FILTER CARTRIDGE, FILTER ASSEMBLY AND METHOD OF FORMING A FILTER CARTRIDGE

专利摘要:
Summary "Filter Arrangements, Components, Assemblies, and Methods" The present invention relates to filter cartridge arrangements, features, and construction methods that are described. also described are filter assemblies having the filter cartridge installed therein as a removable service component. the filter cartridge generally comprises a media pack having one end with an end piece positioned thereon. the end piece includes an end cap section and a sealing bracket. a sealing member is secured to the end cap. mounting and usage methods are described.
公开号:BR112015011479B1
申请号:R112015011479-2
申请日:2013-11-18
公开日:2022-01-11
发明作者:Steven Campbell；Steven Scott Gieseke；Andrew L. Albitz
申请人:Donaldson Company, Inc；
IPC主号:

专利说明:

[001] This application is being filed on November 18, 2013, as an international PCT patent application. CROSS REFERENCE TO RELATED ORDERS
[002] The above application includes, with edits and additions, the description of USSN 13/833,002 filed March 15, 2013 and USSN 61/728,091 filed November 19, 2012. Full Descriptions of USSN 13/833,002 and USSN 61/728,091 are incorporated herein by reference. Priority claims for each of USSN 13/833,002 and USSN 61/728,091 are made as appropriate. FIELD OF TECHNIQUE
[003] The present invention relates to filter sets. In particular, it considers filter cartridges and features that are usable as service parts in filter sets, such as air (gas) purifier sets. In certain specific examples, filter cartridges include an end cap or end piece arrangement comprising a sealing member non-removably secured in place, and typically molded in place of, an end piece; the end piece having a radial sealing support thereon. FUNDAMENTALS OF THE INVENTION
[004] A variety of filter assemblies are known in which a serviceable filter cartridge is positioned within a filter housing. By the term “repairable” in this context, we mean that the filter cartridge is a serviceable component that is installed in the housing, and over the life of the equipment involved, is repeatedly removed and reconditioned or replaced. Examples of such assemblies include, for example, air cleaner assemblies used to filter engine inlet air for internal combustion engines. Such assemblies are used, for example, in vehicles and other equipment.
[005] Serviceable filter cartridges are supplied with a housing seal arrangement. A housing seal arrangement is an arrangement that forms a releasable seal with an appropriate portion of a housing when the repairable filter cartridge is installed for use.
[006] In general, improvements in filter cartridges with respect to end cap construction and/or housing seal arrangement are sought after. Improved arrangements and processes for assembly are described here. SUMMARY OF THE INVENTION
[007] In accordance with one aspect of the present description, a filter cartridge is provided. The filter cartridge can be configured, for example, as a gas (air) filter cartridge, although the principles can be applied in other applications.
[008] In a typical application, the filter cartridge comprises a package of filter media. Typically, the media package is positioned around and defining an open filter interior, although alternatives are possible. Such a media package typically extends between the first and second ends of the media package. The media pack may include pleated media, but alternatives are possible.
[009] The cartridge includes an end piece or end cap having a central gas flow opening therethrough. The end piece is typically molded in place at one end of the media pack. The typical end piece comprises an end cap section and a sealing support section. The end cap section and the sealing support section are typically formed integral with each other, for example molded from a moldable material. The seal support section usually protrudes away from the media pack. In some applications, the sealing support defines a sealing support wall that slopes radially (i.e., toward or away from a central axis) as it extends away from the end cap section to define a recess. of sealing.
[010] A housing sealing element is secured to the open end piece, for example, within a sealing recess (when a sealing recess is present) and configured to form a radially directed, releasable seal with a sealing member. housing, when the filter cartridge is installed for use.
[011] The present description also pertains to preferred sealing arrangements, manufacturing and assembly methods, and related cartridge features and filter assemblies.
[012] As will be clear from the following, there is no specific requirement that a filter cartridge, feature or component; or, a filter, feature or component set, includes all characteristic details and includes applications of all techniques characterized herein, so as to obtain some benefit in accordance with the present description. That is, there is no requirement that a filter cartridge or component be configured to obtain all the possible benefits achievable with techniques described herein, so as to conform to the general teachings cited herein. DESCRIPTION OF DRAWINGS
[013] Figures 1 to 19 of the present application are also found in USSN 13/833,002 filed March 15, 2013 and incorporated herein by reference.
[014] Figure 1 is a schematic open end perspective view of a filter cartridge in accordance with the present description.
[015] Figure 2 is a schematic closed-end perspective view of a filter cartridge shown in Figure 1.
[016] Figure 3 is a schematic perspective view of a filter assembly including a filter cartridge in accordance with the present description detachably positioned therein.
[017] Figure 4 is a schematic cross-sectional view of the filter assembly of Figure 3.
[018] Figure 5 is an enlarged, fragmented schematic cross-sectional view of a part of the set represented in Figures 3 and 4.
[019] Figure 6 is a schematic side view of the cartridge shown in Figures 1 and 2.
[020] Figure 7 is a schematic open end view of the filter cartridge shown in Figures 1, 2 and 6.
[021] Figure 8 is a schematic closed end view of the filter cartridge shown in Figures 1, 2, 6 and 7.
[022] Figure 9 is a schematic cross-sectional view of the filter cartridge, taken generally along line 9-9 of Figure 8.
[023] Figure 10 is an enlarged fragmentary schematic view of an identified part selected from Figure 9.
[024] Figure 11 is a schematic cross-sectional view of a filter cartridge taken generally along line 11-11 of Figure 8.
[025] Figure 12 is an enlarged schematic fragmentary view of an identified part of Figure 11.
[026] Figure 13 is a schematic cross-sectional view of a step of forming a sealing element according to a process for building the cartridge of Figure 1.
[027] Figure 14 is a schematic perspective view representing a step of removing a molded sealing element, such as a preform, from the mold shown in Figure 13.
[028] Figure 15 is a schematic fragmentary cross-sectional view of a step of forming a part of an exemplified filter cartridge including a sealing member and an endpiece component, in accordance with the principles of the present description.
[029] Figure 16 is a schematic fragmentary cross-sectional view of a step of forming a closed end piece in a filter cartridge in accordance with the present description.
[030] Figure 17 is a schematic perspective exploded view depicting features with respect to structure, components and methods for forming a filter cartridge in accordance with the present invention.
[031] Figure 18 is a schematic closed-end perspective view of an alternative filter cartridge in accordance with the present description.
[032] Figure 19 is a schematic fragmentary cross-sectional view of a step of forming a filter cartridge according to Figure 18.
[033] Figures 20 through 46 are not found in the priority documentation of USSN 13/833,002, filed March 14, 2013, and/or provisional USSN 61/728,091 filed November 19, 2012.
[034] Figure 20 is an enlarged schematic cross-sectional view of an air cleaner assembly including a filter cartridge in accordance with the present description having a radially outwardly directed seal shown engaging a housing portion.
[035] Figure 21 is a schematic enlarged fragmentary cross-sectional view of a filter cartridge according to an example described here, but implemented using the radially outwardly directed seal therein.
[036] Figure 22 is a schematic open end perspective view of a filter cartridge in accordance with a further alternative example of the present description.
[037] Figure 23 is an exploded view in schematic perspective depicting features with respect to structure, components and methods to form a filter cartridge according to Figure 22.
[038] Figure 24 is a schematic fragmentary cross-sectional view of a step of forming a closed end piece in a filter cartridge according to Figure 22.
[039] Figure 25 is a schematic fragmentary cross-sectional view of a step of forming a part of the filter cartridge exemplified in accordance with Figure 22, including a sealing element (preform) and an open end piece component of accordance with the principles of the present description.
[040] Figure 26 is a schematic cross-sectional view of a step of forming the sealing element or preform according to a process described here, to build the cartridge of Figure 22.
[041] Figure 27 is a schematic cross-sectional view of the filter cartridge of Figure 22.
[042] Figure 28 is a schematic enlarged fragmentary cross-sectional view of an identified part of Figure 27.
[043] Figure 29 is a schematic open-end plan view of a filter cartridge according to Figure 22.
[044] Figure 30 is a schematic side view of a filter cartridge according to Figure 22.
[045] Figure 31 is a schematic cross-sectional view of a filter cartridge in general according to Figure 22 installed in an air cleaner assembly; noting that in Figure 31, the filter cartridge is shown without certain structural and functional details selected, to emphasize certain points.
[046] Figure 31A is an enlarged fragmentary schematic view of a selected portion of Figure 31.
[047] Figure 32 is a schematic perspective view of an air purifier assembly usable with the cartridge of Figure 22.
[048] Figure 33 is a schematic closed-end perspective view of the filter cartridge of Figure 22.
[049] Figure 34 is a schematic open-end perspective view of a filter cartridge in accordance with yet another example of the present description.
[050] Figure 35 is a schematic perspective exploded view depicting features with respect to structure, components, and methods for forming a filter cartridge according to Figure 34.
[051] Figure 36 is a schematic enlarged fragmentary cross-sectional view of a step of forming a closed end piece of a filter cartridge according to Figure 34.
[052] Figure 37 is a schematic fragmentary cross-sectional view of a step of forming an open end part with a sealing element or preform therein, in a process of forming a filter cartridge according to Figure 34.
[053] Figure 38 is an enlarged fragmentary schematic cross-sectional view of a step of forming a sealing element preform for use in a process according to Figure 37 to form a filter cartridge according to Figure 34.
[054] Figure 39 is a schematic cross-sectional view of a filter cartridge according to Figure 34.
[055] Figure 40 is an enlarged fragmentary schematic view of an identified part of Figure 39.
[056] Figure 41 is a schematic open end plan view of the filter cartridge according to Figure 34.
[057] Figure 42 is a schematic side view of a filter cartridge according to Figure 34.
[058] Figure 43 is a schematic cross-sectional view of a filter cartridge according to Figure 34, installed in an air cleaner assembly for use.
[059] Figure 44 is an enlarged fragmentary schematic cross-sectional view of an identified part of Figure 43.
[060] Figure 45 is a schematic perspective view of an air cleaner housing for use with a cartridge in accordance with Figure 34.
[061] Figure 46 is a schematic closed-end perspective view of the filter cartridge according to Figure 34. DESCRIPTION OF THE INVENTION
[062] I. An example filter cartridge and filter set, Figures 1 to 12
[063] Reference numeral 1, Figure 1, generally represents an exemplified filter cartridge incorporating features in accordance with the present description. The filter cartridge 1 shown is configured as a gas filter cartridge, for example as would be used to filter air; although the techniques described here can be applied to a variety of alternative constructions. In general, the filter cartridge 1 comprises filter media 2m, or a media pack 2, through which the gas (air) to be filtered is passed during a filtration operation.
[064] The particular filter cartridge 1 depicted comprises a media pack 2 including media 2m extending between the first and second media ends 3, 4. In the example, the media package 2 is configured to extend around of an open filter interior 5, and a central axis X. This would be typical for applying the techniques described here, although alternatives are possible. The particular media pack configuration depicted is generally cylindrical, however alternative shapes are possible, including those having non-circular cross-sections and/or those which taper down in cross-dimension in extent between ends 3, 4 (or 4, 3).
[065] Here, the term “media package” refers to a media construction in the filter cartridge. The term “media package” includes the definition of media and may include additional material or structure; for example, the media package may include an inner liner or an outer skin, or both, as discussed below.
[066] The techniques described are particularly advantageous when applied in circumstances in which the media package 2, or at least a portion thereof, is pleated, i.e. includes pleated media. However, the techniques can be applied in alternative applications.
[067] The particular filter cartridge 1 shown is configured for use with outside-in flow during filtration. By this it is meant that the carrier fluid (i.e. typically gas or air) being filtered is filtered as the carrier fluid passes from an outer perimeter 2x of the media pack 2 to an inner perimeter 2i during filtration. The techniques can, however, be applied when cartridge 1 is configured for an alternate flow direction during filtration.
[068] The cartridge 1 shown is configured with the media pack 2 extending between the first and second end pieces 8, 9. The first end piece 8 is positioned at the first end 3 of the media package 2, and generally comprises an "open end piece", i.e. the end piece 8 has a central opening 10 through which fluid (typically gas or air) passes during use. For the particular outside-in flow assembly shown, the central opening 10 is an outlet opening for the filtered fluid (typically gas or air) to leave the interior of the cartridge 5.
[069] In a typical application, with the media 2m surrounding an open interior 2i, the second end piece 9 is positioned at the second end 4 of the media package 2, and is closed to the passage of fluid (typically air or gas) through it. her; that is, it is a closed end piece. The techniques described here can be applied in different applications, however, for example those in which the end piece 9 is open or closed by additional structure.
[070] Still with reference to Figure 1, the particular cartridge 1 depicted includes a media pack 2 that includes an optional inner media holder or casing 12 around which the media 2m, in the media package 2, is positioned. The optional internal media support 12 provides a variety of functions including: media support 2m against shrinkage, radially inward, due to air or gas pressure against the outside 2x during filtration; retention of 2m medium in a desired configuration during fabrication and assembly; and, providing axial strength to the cartridge 2 in an extension direction between the ends of the media pack 3, 4 (i.e., in the X-axis direction) during manufacture, assembly and/or use.
[071] A variety of materials for optional cladding 12 can be used. The exemplified coating 12 depicted comprises an expanded metal coating. However, alternatively, a perforated metal tube may be used, and/or various plastic casing constructions may be used. In some cases, cartridge 1 may be supplied with a media pack that does not include an inner liner, although the use of an inner liner is typical in many cases. In some cases, when an inner liner is not provided on the cartridge, support for the medium 2m, if desired, can be provided by a linear construction already positioned in a housing, in which the cartridge 1 is installed for use. For example, such support may be provided by a support structure comprising a portion of the housing (or coupled thereto), or by the support structure comprising a portion of an internally positioned secondary or safety filter or other arrangement.
[072] The cartridge 1 depicted is shown with the media pack 2 and the media 2m represented schematically, i.e. individual surface details and contours are not shown. Furthermore, it is not indicated whether or not the medium 2m, or the package of media 2, includes an outer covering surrounding the medium. In some applications, with outside-in flow, such an outer jacket will not be used. However, the techniques described here can be applied to cartridges in which an outer coating is provided. The outer shell, when used, may comprise expanded metal, perforated metal, or plastic constructions, for example. Typically, when the 2m medium is pleated, similarly to the inner lining, the outer lining will extend adjacent to the outer pleat tips.
[073] A variety of mid configurations can be used, including mid pleat configurations. The media can be supplied with the pleat tip bending to support the spacing of the media pleats, e.g. as widely used in air filtration and e.g. as can be found in media packs supplied under the brand name “PleatLoc” from Donaldson Company, Inc., of Bloomington, MN, the assignee of the present disclosure. The 2m medium may be provided with one or more beads of adhesive extending along one or both of the inner pleat tips and the outer pleat tips to facilitate pleat spacing, also in accordance with widely used techniques.
[074] Still referring to Figure 1, the cartridge 1 therein includes a housing sealing arrangement 15. The housing sealing arrangement 15 includes a resilient and typically compressible element (housing seal) 16 positioned for releasable arrangement. with a part of a filter assembly by installing the operable cartridge 1 for use. By "resilient" and "releasable sealing engagement" together, and variants thereof in this context, is meant that the housing sealing member 16 comprises an appropriately resilient material which will form a seal in engagement with a housing member when the cartridge 1 is installed, and will release from sealing engagement, when cartridge 1 is removed from interaction with the engaged housing component. Typically, the resilient material chosen will be a compressible material, i.e., a material that can compress in size as it is pushed into place. The releasable sealing engagement will typically be of a type that can be engaged/disengaged under manual forces (installation or removal) provided by a service provider. In addition, typically the releasable sealing engagement will be “no-clamp” or “no-clamp”, that is, it will engage and disengage without the use of a fastener or other structure that needs to be tightened or set in place.
[075] The particular resilient (sealing) element 16 shown is configured to form a radial seal (or radially directed seal) with a housing component in use. The term "radial seal" and its variants in this context refers to a seal that is established with sealing forces directed generally towards or away from a central axis X, surrounded by the sealing element 16. In this case, the central axis X also corresponds to the central axis X for the cartridge 1, around which the means 2 is positioned, and still corresponds to a central axis X for the opening 10.
[076] The particular housing sealing element 16 shown is configured to form a "radially inwardly directed" seal, upon engagement with a housing component, i.e., a seal that engages with the sealing element surrounding the housing component. . While this will be typical for many of the applications in accordance with the present description, the techniques described can be applied when the seal arrangement 16 is configured to form an outwardly directed seal with a housing component in use, i.e., a seal that it engages with a housing member by the sealing member surrounded by the housing member.
[077] The particular housing sealing element 16 depicted generally defines a circular pattern around the central axis X. While this will be typical for many applications, alternatives are possible. Alternatives may include, for example, an oval fence shape yet more alternative geometric configurations.
[078] A variety of materials can be used for the sealing member 16. Typically, the sealing member will be formed from a relatively soft compressible member (compared to the remainder of the end cap 8), such as a polymer. foam that compresses/deflects by engaging with a housing structure. Typical housing seal elements 16 will be formed from a TPE (thermoplastic elastomer) material providing a "molded" density of no more than 28 lbs/cubic feet (0.32 g/cc) and often no more than 15 lbs/cubic feet (0.24 g/cc), e.g. 10 lbs/cubic feet to 15 lbs/cubic feet (0.16 g/cc - 0.24 g/cc) and/or that has a hardness Shore A, after casting, not more than 20, typically not more than 18, and often within the range of 10-18, inclusive. For example, usable materials include foamed polyurethanes such as those described in the US. 8,226,786, incorporated herein by reference, although alternatives are possible.
[079] A typical housing seal arrangement 16 comprises a molded element which is preformed prior to being incorporated into the cartridge 1, and which, upon incorporation, cannot be easily removed from the cartridge 1 without damaging either the seal element 16 or other parts of the cartridge 1. Alternatively indicated, the typical housing sealing element 16 is a preformed element (or preform) secured to the remainder of the cartridge 1 in a non-removable manner. Thus, when the cartridge 1 is removed and replaced, so is the sealing element 16.
[080] As the sealing member 16 is typically formed from a compressible/resilient material, it is typically desired to provide the sealing arrangement 15 with a sealing support (radial). Cartridge 1 includes such a sealing bracket as indicated at 20. The sealing bracket 20 is a relatively rigid construction (compared to the sealing member 16) which provides structural and radial support to the radial sealing member 16 to ensure the integrity of the sealing member 16 and to provide the structure against which the sealing member 16 is radially compressed when the sealing member is radially engaged with a housing sealing arrangement. Alternatively stated, when the cartridge 1 is installed, the sealing member 16 becomes radially compressed between the housing member against which it seals and the sealing support. Since the sealing arrangement 15 shown is a radially inwardly directed seal, the sealing bracket 20 is positioned encircling the sealing member 16. (If the sealing member 16 were configured to form a radially outwardly directed seal , the sealing support would comprise structure surrounded by the sealing element). As will be understood from a more detailed description below, the particular sealing support 20 described preferably comprises a structure which also cannot be removed from the cartridge 1, once positioned therein, without damaging the sealing support and/or the rest. of the cartridge. Furthermore, for the example shown, the sealing bracket 20 comprises an integral part or end cap section or end piece, together with an end cap section 21, discussed below.
[081] Typically, the only part of the end cap 8 that forms a seal with the housing member is the sealing member 16 configured to form a radially directed seal. That is, preferably, no part or material in the end cap 8 other than the sealing member 16 is positioned to form a seal of any kind with the housing member when the cartridge 1 is installed. While alternatives are possible, construction with only one sealing member 16 (as characterized) is preferred.
[082] Although alternatives are possible, typically the sealing support 20 is a solid, continuous element extending around the central axis X. By "continuous" in this context it is understood that preferably the sealing support 20 does not have any openings therein, in parts which support the sealing member 16, i.e. parts against which the sealing member 16 presses, although spaces can be accommodated. By "solid" in this context it is meant that the sealing element 20 preferably does not have any openings therethrough, in parts that support the sealing element 16, i.e. parts against which the sealing element is pressed by means of the installation, although openings can be accommodated.
[083] Still referring to Figure 1, it is noted that the sealing support 20, when positioned around the sealing element 16 as shown, provides protection to the sealing element 16 against damage during handling and transport. Generally speaking, having a relatively rigid structural member adjacent to the sealing member 16 facilitates this.
[084] As can be understood from the discussion below in conjunction with Figures 3-5, typically when cartridge 1 is installed in a filter assembly for use, a first end of cartridge 1 at which the sealing arrangement 15 is positioned, is pressed against an end wall of the housing. It is preferred that this coupling has resilience, for stable support of the cartridge 1 during the operation of the equipment, such as under conditions that induce vibrations, temperature fluctuations and/or shock. To provide this, the cartridge 1 includes an axial damping arrangement 25 (Figure 1) positioned on the end piece 8, at an axially more remote location from the end of the middle 4, and an end piece 9 and/or end of the media pack 3 than any part of the end piece 8. The illustrated damping arrangement 25 shown is integrated with a resilient compressible member that forms the sealing member 16, and comprises the same material. The particular damping arrangement 25 (Figure 1) described projects axially beyond an end 20x of the sealing bracket 20, and comprises a plurality of spaced-apart projections 25p, separated by recesses 25r, although alternative shapes are possible. The particular configuration for the shown damping arrangement 25 is discussed further below.
[085] In Figure 2, a perspective view of cartridge 1 is provided, directed generally towards end piece 9. While alternatives are possible, end piece 9 can be seen as comprising a closed end piece in the example shown; that is, there is no opening through the end piece 9. The end piece 9 can also be seen to have, projecting axially outward in a direction generally away from the end piece 8, an axial projection arrangement 28 configured to engage with a part of a housing, during installation of the cartridge 1, as discussed below. The projection arrangement 28 depicted is configured as a continuous ring, although alternatives such as segmented rings are possible. The typical preferred operation of the projection arrangement 28 is discussed further below in conjunction with other figures. In general, the projection engagement 28 may comprise either a relatively hard rigid material (compared to the damping element 25 and the sealing element 16) or a soft compressible material (compared to the support 20). It is generally configured to engage an end of the housing opposite the housing damping groove 25, upon installation of the cartridge 1, to support the cartridge.
[086] Attention is now directed to Figure 3. In Figure 3, a schematic perspective view of an air cleaner assembly 30, including a filter cartridge in accordance with filter cartridge 1, is represented. Figure 3 should be understood to be schematic, and a variety of specific housing features can be used with the principles in accordance with the present description. For example, housing features as described in US 6,312,491, US 7,455,707, US 6,139,607, US 7,981,187, WO 89/01818, WO 2012/116314, WO 2006/026241, WO 2006/119414 , WO 2009/014982 , WO 2009/014986 , WO 2009/014988 , incorporated herein by reference, can be used. The filter assembly 30 depicted would typically be configured as an air cleaner assembly, but, as mentioned above, alternative applications are possible.
[087] Referring to Figure 3, the filter assembly 30 comprises a housing 32 having a housing body portion 33 and an access cover 34. The access cover 34 is removably positioned on the body portion 33 for maintenance access to interior 32i of housing 32. Generally speaking, upon removal of access cover 34, an internally received cartridge 1 can be removed, and/or a cartridge 1 can be installed.
[088] Still referring to Figure 3, at 36, a gas flow tube is provided, allowing flow access to the interior 32i. The particular flow tube 36 shown is a gas (air) flow inlet since the filter assembly 30 is configured to flow from outside to inside through cartridge 1 during filtration. Of course, in selected alternative applications, the flow tube 36 could be an outlet flow tube for filtered air.
[089] Attention is now directed to Figure 4, a schematic cross-sectional view of the filter assembly 30. Here, the cartridge 1 can be seen installed with the interior 32i of the housing 32. The housing 32 is seen to include a second tube of flow 37. For the particular assembly shown, the flow tube 37 is an outflow tube of filtered gas (air), but alternative constructions are possible, for example, with the flow during filtration being through the tube 37 to a interior 2i surrounded by cartridge 1, through means 2, and then out through flow tube 36, Figure 3.
[090] Still referring to Figure 4, the particular filter assembly 30 depicted is shown including a repairable secondary or safety filter cartridge 40 positioned therein. Filter or security cartridge 40 is positioned with means 41 thereof positioned in an interior 5 of cartridge 1 at a location surrounded by media pack 2. As gases flow through media pack 2 from outside 2x to the inside 2i, they are filtered. The gases are then passed through the security cartridge means 41 into the open central interior 42 (and a portion of the interior of the cartridge 5 of the main cartridge 1). These gases can then pass to the outside through the tube 37. The optional safety cartridge 40 can be constructed in a variety of configurations, now known or later developed.
[091] In Figure 4, the cartridge 1 can be seen positioned in extension between an end 34x of the access cover 34, and an end 33x of the housing body part 33. In the particular arrangement shown, the cartridge 1 is configured with a central axis X extending vertically, and with the end piece 8 directed downwards. However, alternative orientations are possible with the principles according to the present description, including, for example, horizontal and inverted ones.
[092] In Figure 4, it can be seen that the cartridge 1 is stabilized axially, that is, against unwanted movement in the direction of the X axis, by engagement between the projection arrangement 28 with the end 34x, and the damping arrangement 25 with the 33x end. The damping arrangement 25 provides some damping in this engagement to help stabilize the cartridge 1 under vibration, shock, etc. In addition, providing hitch damping helps ensure manufacturing variance is accommodated and variations in temperature fluctuations are managed.
[093] Typically, a locking arrangement (not shown) or other connection arrangement is provided between the access cover 34 and the housing body 33. Typically, the connection arrangement is configured to help ensure that the cartridge 1 is secured in place under axial compression between the 33x and 34x ends.
[094] Still referring to Figure 4, it is preferred that the cartridge 1 does not form an axial seal with the end 33x of the cartridge, i.e. a seal under compression in the direction of the axis X. Reasons for this include that the housing 32 it is not often built to maintain and ensure such a seal. In addition, there may be housing structure, for example reinforcing ribs or other structures, at the end 33x in the region where it is engaged by damping arrangement 25. The particular damping arrangement 25 shown in Figure 1 comprises a plurality of projections 25p separated by recesses 25r and thus do not provide an end edge readily capable of such unwanted axial sealing engagement.
[095] Although alternatives are possible, preferably projections 25p and recesses 25r are configured and sized so that even in recesses 25r, a damping arrangement 25 projecting axially beyond an end or tip of bracket 20 is provided. Thus, even if the projections 25p fully compress, damping material will still be present from the regions 25r to help prevent hard contact between the support 20 and the housing body 33.
[096] Referring to Figure 4, the filter assembly 30 includes a sealing flange 44, which projects axially into the housing 32i, for sealing engagement by the sealing member 16. The sealing flange 44 shown comprises a part integral with the remainder of the housing section 33. However, the sealing flange 44 may, for example, comprise a part of a flowtube or other housing construction which is assembly-coupled to the remainder of the housing section 33 as opposed to being formed integrated with it.
[097] Still with reference to Figure 4, the particular sealing flange 44 illustrated is configured to be encircled by the sealing member 16 during a releasable sealing engagement with it, resulting in the radially directed housing seal (in this, directed radially inward). ) releasable.
[098] In Figure 4, it can be seen that the sealing flange 44 is also positioned to be sealed against, along a radially inner surface thereof, by a sealing arrangement positioned on an optional safety cartridge 40. Such an optional safety hitch is known.
[099] Still referring to Figure 4, at 45, in the housing section 33, it is optional for the structure to provide a stabilizing/centering support for one end of the cartridge 1 in the end piece 8; and at 46, access cover 34 is provided with stabilizing/centering bracket encircling one end of cartridge 1 in endpiece 9. Such stabilizing rings as rings 45, 46 are optional but can help provide stability and security for cartridge positioning 1.
[0100] Attention is now directed to Figure 5, an enlarged fragmentary cross-sectional view of a portion of Figure 4, generally in the vicinity of sealing flange 44. The features of housing 30 viewed and discussed previously include a housing body portion 33, end wall 33x, flow tube 37, and support arrangement or ring 45.
[0101] Parts of the safety filter or cartridge 40 can also be seen. The sealing member 40x can be seen positioned on the safety filter or cartridge 40, in releasable sealing engagement with an inner surface 44i of the sealing flange 44, as an outwardly radial seal.
[0102] Selected parts of the main cartridge 1, which can be seen in Figure 5 and discussed above, include: the media pack 2 having the end 3; outer 2x and inner 2i of the media pack; inner lining 12; end piece 8; sealing member 16; and sealing bracket 20. Damping arrangement 25 can be seen with a spike 25t projecting into engagement with end wall 33x. The overlap indicated in the drawings between tip 25t and end wall 33x indicates an exemplified amount of interference or damping that would typically occur at that location. Similarly, the overlap between sealing arrangement 16 and flange 44, on an outer surface 44x of flange 44 shows radial interference during normal sealing installation.
[0103] The exemplified dimensions provided in Figure 5 are as follows: XA = 16.6 mm and XB = 1.8 mm. Alternatives can be used.
[0104] Still with reference to Figure 5, some particular and advantageous preferential features of the end piece 8, especially related to the sealing support 20, can be understood. First, the particular end piece 8 shown can be seen as having two sections: an end cap section 21 and a sealing support section 20. In the example shown, the cap section 21 extends completely through the end cap section 20. end 3 of the media pack 2 and the middle 2m between the inside 2i of the media pack and the outside of the medium 2x. Typically, when the middle 2m is pleated, the end piece part 21 has a middle end part 2 incorporated therein, and thus is molded in place and comprises a material that can flow into the spaces between the pleats to ensure the seal, before complete curing takes place. Typically, the end cap section 21 is solid in extension through one end 3 of the media package 2, i.e. it does not include any openings overlapping with the media 2m, so as to avoid undesired levels of leakage. Of course, the endpiece 21 does not encircle a central airflow opening 10 discussed above.
[0105] Still with regard to the end piece or end section 21, attention is directed to the groove 48. The groove 48 is an artifact from a media spacer in a mold in which the end piece 8 would be formed . Such media separator rings/grooves are typical on many cast-in-place parts.
[0106] Another characteristic observable in Figure 5 is that for a typical preferred application, the support structure 20 is integrated with the end section 21, that is, the two are formed integrated with each other (as integrated parts of the same material ). Typically, both comprise molded parts of a molded-in-place material, as discussed below.
[0107] Still referring to Figure 5, another feature that can be understood from the Figure with respect to the sealing support 20 is that generally the sealing support 20 defines a sealing or wall engaging surface 20i against which the seal 16 is pressed. Although alternatives are possible, for the example shown, the seal or wall engagement surface 20i is a surface that extends in a direction away from the end section 21 at an angle that is not parallel to a central axis X of the seal. , and so is not perpendicular to a plane that is perpendicular to the central axis X. In Figure 5, an exemplified plane perpendicular to the central access X is usually indicated in Y. With respect to this definition, for example, an angle of surface 20i extending axially away from the media pack 2 or the medium 2m (or end section 21) is generally indicated in Z. When such a supporting wall or sloped surface 20i is used, it is typically sloped at a Z angle that is at least 30°, in many typical applications not more than 85°, and often not more than 80°, more often not more than 75°. It is also typically at least 40°, and often at least 55°. In typical arrangements it will be within the range of 50° to 80° inclusive, typically within the range of 55° to 75° inclusive, often 60° to 75°. In general, the sloped wall 20i, in coordination with a part of the end section 21, forms a recess of the sealing member 16x in which the sealing member 16 is nested or positioned.
[0108] In a later example given here, the Z angle can be very large, in fact in some cases it can be 90°, but typically not greater than approximately 89.9°, and often not greater than 89.5 °, so that it forms at least some recess in preferential cases.
[0109] Note that, in the example shown, the sloping wall 20i (i.e., wall 20) is shown sloping from a location approximately at an intersection with section 21, as it extends axially out of the medium 3. This will be typical. However, in some applications of the techniques described here, a wall section 20i (i.e., a bracket 20) that slopes as defined may be a section that does not intersect the end section 21. For example, the part that The incline may be elsewhere extending away from the end section 21 generally perpendicular to the central axis X, which then turns to form the incline. It is preferred, but not necessary in all cases, that the inclined section 20i (for the support 20) be a section in radial overlap with a portion of the element 16 that forms the radial seal, in use, however. That is, so that the sealing part 16 is preferably within a recess as defined, and with the radial support provided by the support element 20 being provided by an inclined section, to take advantage as discussed below.
[0110] Note that there is no specific requirement that in all applications of the techniques described here, the surface 20i, i.e. the support surface for the sealing support, is not perpendicular to a plane perpendicular to the central axis X That is, again, in some cases, the surface 20i may extend generally parallel to a central axis X, while still obtaining some benefit in accordance with the present disclosure.
[0111] For the particular exemplified arrangement described, the surface or wall 20i slopes towards the central axis X as it extends further away from the media pack 2 at the end 3. However, if the sealing arrangement were to be configured for a radially outwardly directed seal, an opposite extension angle, i.e. away from the central axis X, would typically be involved when a tilt is used. Thus, a slope in surface 20i is typical as it extends from the end of the media pack 3 and the end cap section 21; with the slope being in the general direction of seal 16 (radially in or radially out).
[0112] Still with reference to Figure 5, for the particular example shown, the inner surface 20i of the support 20, which, in this case, is the sealing support surface, is generally smooth and regular. However, while this can be advantageous in many cases, it is not specifically required. That is, the support surface or wall 20i can be irregularly formed and still provide the desired support. When an irregular shape is involved, generally reference to slope is intended for a general slope or angle, disregarding surface irregularities.
[0113] Still referring to Figure 5, the tip 20x of the sealing support 20 can be seen ending with the damping part or section 25 of the sealing element 16 projecting axially therefrom, in a direction away from the middle 3. This is preferred, but not required in all cases. Typically, the maximum amount of this extension beyond the 20x tip by the 25t tip is at least 2 mm, usually at least 4 mm, typically at least 5 mm, and generally not more than 20 mm and typically not more than 15 mm, although alternatives are possible.
[0114] It is noted that typically up to portions 25r of the tip 25t between the various projections 25p also extend beyond the tip 20x of the holder 20, typically at least 0.5mm, generally at least 1mm. This is advantageous as it helps to ensure that even if the 25p projections are fully compressed, it is still unlikely that any part of the 20x end will engage the housing, which is advantageous to ensure that the cartridge 20 is supported without an engagement. of hard contact between the support 20 and a part of the housing, during use.
[0115] In a typical assembly, a sealing element 16 is not removable from the end piece 8, i.e. from the engagement with the section 21 and the support 20. That is, the sealing element 16 cannot be separated from these two sections (20, 21) of the end piece 8, without damage to one or the other. This provides good structural integrity during use. Preferably, such non-detachable engagement is established by forming the end piece 8 by: preforming the sealing arrangement 16; and then molding the end piece 8 into place, in position to engage both the media pack 2 and the sealing member 16. Exemplified techniques for achieving this are described hereinbelow.
[0116] Still with reference to Figure 5, and although alternatives are possible, it is noted that, for the example shown, no part of the sealing element 16 extends along, over or against, a surface 20o, of the support 20 , which is the opposite surface or wall 20i. This would be typical for preferred applications in accordance with the present description, as the support 20 would typically have been molded in place, in engagement with a preformed sealing member 16.
[0117] In Figure 6, a side view of cartridge 1 is represented. Note that, as described and illustrated, the particular cartridge 1 shown and described is generally radially symmetrical, i.e. when viewed from the left or right in Figure 6, or in a direction opposite to that shown in Figure 6, the cartridge 1 would generally look the same. Of course, there could be minor differences concerning such features as: middle detail; and, the precise number and orientation of 25p projections. In general, cartridge 1 will typically have general radial symmetry, but for surface details, although alternatives are possible.
[0118] In Figure 7, a schematic plan view taken generally towards the end piece 8 is provided. Note that the inner surface features on an opposite end piece 9 of the cartridge from the end piece 8 are not represented in detail in Figure 7.
[0119] In Figure 8, an end view towards the closed end piece 9 is represented. Features previously discussed include the 28 projection.
[0120] In Figure 9, a cross-sectional view taken along lines 9-9, Figure 8 is shown. Here, the previously described selected features include: the media pack 2, the end piece 9, and the end piece 8, the support section 20, the end cap section 21, the sealing member 16, the or damping arrangement 25, and inner liner 12. At 50, a spot-welded seam is schematically depicted on an expanded metal inner liner 12.
[0121] In Figure 10, an enlarged fragmentary view of an identified part of Figure 9 is shown. It is noted that the inner liner 12 can be embedded in a part of the end piece 8, in particular a part of the end cap part 21.
[0122] In Figure 11, a second cross-sectional view, taken generally along lines 11-11, Figure 8, is represented. Note that, by comparison with Figure 9, in Figure 11 the cross section is through a recess at 25r in the damping section 25, while in Figure 9 the cross section is through the projections 25p in the damping section 25 Again, although not necessarily shown in Figure 12, preferably within the recesses 25r, at least a portion of the element 16 extends axially beyond the tip 20t in a direction away from the middle 2 and the section 21. It is not necessary, however, let all recesses 25r so extend.
[0123] In Figure 12, an enlarged fragmentary view of an identified part of Figure 11 is represented.
[0124] II. Exemplified method for constructing an array according to Figures 1 to 12; Figures 13 to 17
[0125] A variety of methods can be used to construct a filter cartridge 1 in accordance with the features discussed and described above in conjunction with Figures 1 to 12. In Figures 13 to 17, a particularly advantageous and usable construction approach is schematically represented.
[0126] As discussed earlier, in a typical application of preferred principles in accordance with the present description, cartridge 1 will be made in a process that involves preforming sealing arrangement 16 before being positioned on cartridge 1 (and in engagement with end piece 8). In Figures 13 and 14, a process for forming (i.e., preforming) such a sealing arrangement (or preform) is schematically depicted.
[0127] Referring to Figure 13, a schematic cross-sectional view is provided of a mold or mold array 60 having a resin array 61 positioned therein. The resin arrangement 61 comprises a resin from which the seal 16 would be formed. The process shown in Figure 13 is an "open mold" process, in which the sealing member 16 is formed from a resin 61 poured into an open mold and then allowed to cure. It is understood, however, that the described processes can be applied in a closed mold process. Thus, the sealing member 16 may be formed from a free expansion process or may be formed from an alternative process, such as, for example, an injection molding process or through other techniques.
[0128] Typically, the sealing member 16 will be formed from a resin that increases substantially in volume during curing, for example at least 50% generally at least 60%, often 70% or more, in many cases. cases, at least 80%. Typically, the sealing member 16 will be molded from a foam polymer, such as a foamed polyurethane. Exemplified usable materials are those described above.
[0129] An advantage to forming the sealing member 16 from a resin that swells during curing, which typically forms a foam component, is that the resulting sealing member will be compressible, i.e. it can be compressed. as a resilient element between the structure when forming a seal and to conform to a surface against which it seals. Such materials will sometimes be characterized as "soft" since, relative to the structural supports against which they are compressed, they are soft materials. Thus, typically and preferably, the previously discussed sealing member 16 comprises a portion of a soft compressible member which is formed from a foam resin during curing.
[0130] In Figure 14, a step 65 of removing a molded gasket 16 (or preform) from the mold 60, after the resin 61 has sufficiently cured (Figure 13), is shown. Referring to Figure 14, seal 16 can be seen as having an end 25 comprising projections 25p separated by recesses 25r. Furthermore, the seal 16 can be seen as having a sealing surface section 16s configured for engagement with a housing feature in a releasable seal form. The surface section 16s for the shown seal 16 encircles a central opening 10 and the X axis, because the particular cartridge for which the shown seal 16 is configured has a radially inwardly directed seal.
[0131] Still referring to Figure 14, the seal 16 (or preform) includes a base end 16b which is an opposite end 25 that comprises a portion directed towards the end of the media pack 3, Figure 5, on the cartridge 1 resulting.
[0132] In Figure 15, a step of forming the end piece 8, using the preformed sealing element 16, is shown schematically, and in cross section. Referring to Figure 15, a mold 70 is shown having a mold cavity 71. Within the mold cavity 71, a preform sealing member 16 is positioned as a preform. Typically, after positioning the preformed sealing member 16, a resin will have been poured into the cavity 71, which resin is suitable for forming the end piece 8, i.e. sections 20 and 21. Typically, then, the end 3 of the media pack 2, including an end 12e of the optional liner 12, will be placed in the mold cavity 71 to be engaged by the resin forming the end piece 8 during curing. The resin can flow into and engage the middle 2m and the cladding 12, holding the construction together as sections 20 and 21 are formed. Furthermore, if the resin 8 is chosen from a material that will fully engage and adhere to the gasket 16 along an interface between the two, the gasket 16 will be securely held in place, non-removably. Typically, it is desirable to form the sealing ring 16 and the molded parts in place of the end piece 8 of chemically similar materials, e.g. both could be formed from urethanes which differ from each other with respect to density, hardness or amount. of foam. Typically, endpiece 21 will have a molded density of at least 0.08 g/cc greater than seal 16, typically at least 0.2 g/cc more. When urethane as described above is used for the gasket 16, it will be particularly convenient to choose a urethane to form the bracket 20 and the end piece 21, which typically has a density of at least 35 pounds/cubic feet (0.4 g /cc) and often at least 40 pounds/cubic feet (0.46 g/cc), for example, 45 to 55 pounds/cubic feet (0.51 g/cc to 0.63 g/cc), inclusive; and/or, a Shore A hardness of at least 30, typically at least 35, often at least 40, and generally not more than 75; for example 40 to 70 inclusive. Typically, such a resin, if it increases in volume during curing, increases relatively minimally, i.e., no more than 30%, typically no more than 20%, and often no more than 15%.
[0133] Typically, the order of inserting the components and materials into the mold is not crucial, except to manage the desire to form the end piece and support for the middle and the sealing element, holding the two together.
[0134] In Figure 15, a media support 75 is shown, against which the media 2m or media pack 2 rests, during the molding of the end piece 8. The media support 75 will leave the artifact 48 as discussed above, on the end piece 8. Typically, the media support 75 is sized and configured so that at least a thin region of the end piece 8 forms over it, to avoid the formation of a weak spot or region.
[0135] Still with respect to Figure 15, the process described and shown is an "open mold" curing process. An open mold process will be typical as the media package 2 (including the liner 12) can protrude outside the mold cavity; and, the resin needs to flow to the end of the middle, e.g. around the pleats (if the pleated middle is used) to ensure a good seal of the end piece extending through the middle 12.
[0136] In Figure 16, a schematic representation, in cross section, is provided of a step of forming the end piece 9. Here, a mold 80 is represented having a mold cavity 81. Inside the cavity 81 is positioned a resin 84 which will cure to form the end piece 9. Also positioned within the cavity 81 is an end 4 of the media pack 2 (including an end 12y of the liner 12). When cured, the resin 84 will form an end piece 9 fixed in place and holding the liner 12 and the middle 2m together in a proper manner. Note that once the end piece 9 is closed, resin 84 is distributed within the mold cavity 81 between open interior 5.
[0137] End piece 9 can be constructed of a variety of materials, and can be formed with either a hard construction (compared to sealing member 16) or soft construction (compared to sealing bracket 20) as wished. For the particular process shown in Figure 16, a material that will form a relatively hard construction, such as a material similar to that used to form the end piece 8, is used. However, a softer material (such as the seal 16 construction) may be preferred for a dampening effect.
[0138] Note that in Figure 16, the molding process described is an "open mold" process. An open mold process will be typical and preferred as it allows parts of the middle 2m and the optional liner 12 to protrude out of the mold.
[0139] In Figure 17, at 90, an exploded view is shown of materials related to the construction of a cartridge 1 in accordance with the present description. It is not suggested by Figure 17 that the components would be constructed and used in the orientation shown, merely that these materials are used to construct cartridge 1.
[0140] It is not crucial to obtain a desirable cartridge 1 if the end piece 8, or the end piece 9 is the first formed end piece. Several orders can be used in a process according to the present description.
[0141] III. Selected alternative constructions; Characteristics
[0142] In Figures 18 and 19, an alternative closed end piece to the end piece 9 is represented. Referring to Figure 18, a cartridge 101 is shown. Cartridge 101 may be generally analogous to cartridge 1, except for the selected construction of a closed-end piece. Thus, the cartridge 101 comprises the media pack 2, the first end piece 8 and the second piece 109; the second exemplified end piece 109 being a closed end piece. The second part 109 comprises a molded-in-place section 110 having a preformed compression ring 111 attached thereto. This construction allows the end part 109 to have a composite construction, in which, for example, a region 110 may have a first density or hardness; and compression ring 111 may have a second density or hardness or different density or hardness. Typically, when this approach is used, the ring 111 will be softer and less dense than the section 10. A method for constructing such an arrangement can be understood with reference to Figure 19.
[0143] Referring to Figure 19, a step of shaping the end piece 109 is shown. Here, the media package 2 (including optional liner 12) is inserted into a cavity 121 of a mold 120. Also, within the mold 20, is a preformed ring or cushion structure 125. A typical process would involve placing a preformed ring 125 into mold 121, pouring a suitable resin 130 to form an end cap 110, and then inserting the ends of a liner 12 in the middle 2m into the mold. As the resin 130 cures, it will secure the compression ring 125 to the remainder of the cartridge. A typical approach would be to use a related chemical (such as urethane) for both the resin 130 and the preformed ring 125, formulated to cure to different densities and/or hardnesses. For example, the ring 125 could be formed from a resin similar to that used for the sealing ring 16, and the resin 130 could be a resin similar to that used for the hard regions 20/21 of the endpiece 8 discussed above.
[0144] IV. Selected exemplified features and advantages
[0145] A. Configuration of selected parts of the sealing element 16 that engage a housing sealing element and that are radially compressed during installation
[0146] Attention is now directed to Figure 10. From a comparison of Figures 5 and 10, it can be understood that the sealing member 16 includes a sealing surface part 16s that engages a selected housing part during use, to form a seal. For the particular exemplified arrangement shown, the surface 16s is a radially inner surface of the sealing member 16. However, again, in an alternative embodiment in which the seal is directed radially outward, the surface portion 16s will be a radially external portion.
[0147] The sealing surface 16s preferably includes an extended section that engages the housing element to form a seal, which is devoid of any projection ledge or step along a length of the axial extension of at least 6 mm , typically at least 10 mm and often at least 12 mm, for example 12 to 20 mm, inclusive. This span length is at least a part of the region shown in Figure 5, where indicated by dimension XA. Thus, preferably, the surface 16s in this region is smooth and without substantial surface disruption.
[0148] Preferably, the surface 16s along the same region of extension, i.e. the part forming a seal with a housing sealing element, extends almost parallel to the central axis X, typically with only a minor angle, for example, as an angle of inclination provided in the molded configuration during forming to facilitate demoulding, from a process as shown in Figure 13 and discussed above. Such an angle will typically be no greater than 2°, typically no greater than 1°, for example approximately 0.2° to 0.7°. Determined with respect to a plane perpendicular to the X axis, typically the angle is not less than 88°, usually not less than 89°, often 89.3° to 89.8°. For the view shown in Figure 10, the slope angle would be the slope (typically inward) in extent between approximately region F and region G. If sealing member 16 were configured as an outward facing seal, it would be a slope (typically outward) between analogous regions.
[0149] The particular end piece 8 shown is shown with an internal radial chamfer or bellows section 21b adjacent to the base 16b, Figure 10. The bellows section 21b provides stability for the end 16b and for engagement with the liner 12.
[0150] Still referring to Figure 10, it is noted that in the axial extension towards the media package 2, along the sealing section 16s, as a result of the thickness of the sealing region 16 and the slope of the supporting wall 20i, the amount of material in region 16 becomes progressively thicker in extent in a direction between locations F and G. Typically, seal 16 is configured to be at least 5 mm, often at least 9 mm thick, typically at least 9 mm thick. at least 7 mm thick, generally 7 to 18 mm thick and generally not more than 20 mm thick, at an axial location of engagement during sealing most remote from the media pack 2, for example, at approx. F; and, the sealing material 16 is configured to be at least 9 mm thick, typically at least 15 mm thick; and, generally at least 4 mm thicker (typically at least 5 mm thicker) at a location adjacent to region G, i.e. adjacent to a portion of the surface 16s that forms a seal more closely positioned adjacent to medium 2, axially, relative to region F. The dimensions indicated in this section are intended to be when the material in region 16 is in a relaxed state, that is, when cartridge 1 is not installed.
[0151] Typically, the compressibility of the material of the sealing element 16 is relatively constant. Thus, if the structure around which the sealing surface 16s is of relatively small narrowness, with respect to the central axis X, as the cartridge 1 is positioned, the higher amount (99.9% thickness) of compression will initially occur in region F, and as more insertion takes place, the force that is required to move cartridge 1 increases relatively slowly, as the material of sealing member 16 has a greater radial distance over which to compress, with the total amount of compression in the region indicated in XB, Figure 5, as measured by mm of displacement of sealing member 16 radially, remaining relatively constant.
[0152] Also, as in region G, the sealing material 16 is generally not compressed (99.9% thick) as in region F, the cartridge in the end piece 9 can be balanced relatively easily, to facilitate the disengagement of cartridge 1 with the housing, during maintenance. That is, as cartridge 1, when installed in a housing, is gripped to dislodge, material in region G, which is not as compressed as in region F, allows the cartridge to be easily rocked, with material in region G being alternately compressed and released during the swing. This is desirable to facilitate cartridge removal.
[0153] Furthermore, during installation, the greatest amount of compression on the seal (99.9% thickness), during installation, will be in region F. As more insertion occurs, when the material of element 16 is deflected by the structure against which it is compressed, through its thickness, the shape of support 20 allows element 16 to absorb compression over a wider radial range, resisting further compression during installation to a lesser degree than compression initial. This makes installation easier.
[0154] B. Advantages over molding the end piece from a relatively hard material that does not substantially rise during curing
[0155] In preferred applications of the techniques described herein, the material of the end cap piece that forms the end cap section 21 and support section 20 is a relatively hard material that does not substantially increase in volume during curing. As indicated, preferably it is a material which, if it increases in volume, does not increase in volume by more than 30%, preferably not more than 20%, more preferably not more than 15%. Advantages are gained from this. These can be understood, in part, in relation to Figure 10.
[0156] In particular, adjacent to the outer perimeter of the media pack 2x, the end piece 8 needs to completely encompass the medium 2, to ensure the sealing of the end cap. However, it needs to project radially outward from the media pack 2x substantially. Typically, when a high foaming, free-rising urethane or similar material is used to mold the endpiece 8 in place, there will need to be a margin for substantial expansion of the material radially out of the 2x outer perimeter. However, when a relatively low free-rise volume low rise material is used, there will be no need for substantial expansion of the material radially outside the 2x outer perimeter of the medium. Typically, in a preferred material as characterized herein, the amount of reach or extension of the end piece 8 radially outwardly from adjacent parts 2x of the media pack is used is not more than 2 mm, typically not more than 1, 5 mm, and often not more than 1 mm. The advantages of this refer, in part, to the advantageous use of the volume of the medium. That is, within the same perimeter volume of the cartridge, the media pack can have a large radially outer reach, which means that more media is present. When more medium is present, the net result is the ability for longer cartridge life within the same volume; or, using a smaller volume to achieve the same cartridge life.
[0157] A similar observation can be made with respect to the end piece 8 adjacent to the inner perimeter 2i of the media package. Here, generally, the radial inward extension adjacent to the media pack 2i is not more than 2mm, typically not more than 1.5mm, and often not more than 1mm. Again, this results in efficient use of media package volume and related advantages identified above.
[0158] Note that with respect to the outward radial dimension and the inward radial dimension of the end piece 8, reference has been made to adjacent parts of a media package 2. This refers to any adjacent part of the media package 2. means, i.e., for example, the combination of the means and any coating present. In the example shown, on the outer perimeter 2x no cladding is present, so the dimension is also with respect to the middle 2m. On the inner perimeter 2i, a coating 12 is present, so that reference is to a dimension radially inwardly from the coating 12.
[0159] V. Variations and Exemplified Characteristics, Figures 20 to 46
[0160] Here above, together with Figures 1 to 19, the exemplified modalities are described, according to the characteristics and principles discussed and described in general here, and as characterized in USSN 13/833.002, filed on March 15, 2013 and/or USSN 61/728,091, filed November 19, 2012, each of which is incorporated herein by reference. In this section, some additional examples are presented and described in conjunction with Figures 20 through 46. The specific descriptions in Figures 20 through 46 were not included in USSN 13/833,002 and USSN 61/728,091. However, the features and descriptions, as will be clear from the following characterizations, are consistent with what is described in USSN 13/833,002 and USSN 61/728,091. In fact, the same characteristics, variations, preferences and alternatives characterized by Figures 1 to 19, and the disclosure of USSN 13/833,002 and/or 61/728,091 are applicable, with appropriate adjustments in detail, for application with respect to variations of the Figures 20 to 46, whether or not specifically characterized as such herein in conjunction with those figures.
[0161] A. Exemplified outward-directed radial seal, Figures 20-21
[0162] Here above and in USSN 13/833,002, it has been specifically and repeatedly stated that the principles of the present description can be applied in conjunction with a radially outwardly directed seal. In Figures 20 and 21, examples of such modalities are represented.
[0163] Attention is first directed to Figure 20. Here, a schematic fragmentary cross-sectional view is shown of a filter cartridge 201 shown in sealing engagement with an air cleaner housing 232 of an air cleaner assembly 230.
[0164] Housing 232, then, includes a housing body part 233. Of course, it would include an access cover analogous to access cover 34, not shown. At 237, a flow tube is provided, for flow access with the interior 232i of the housing 232. For the example shown, the flow tube 237 would be an outlet flow tube for filtered gas (air), but constructions alternatives are possible. When the flow tube 237 is an outlet tube, the filter cartridge 201 should be configured for outside-in flow during filtration, as characterized above for the embodiment of Figures 1 to 19.
[0165] The depicted cartridge 201 includes a media package 202 that includes an optional intermediate support or casing 212 around which the media 202m of the media package 202 is positioned. Optional intermediate support 212 may be otherwise characterized herein.
[0166] In general, cartridge 201 may be analogous to cartridge 1, except configured for an outwardly directed radial seal as characterized. Specifically, the exemplified cartridge 201 includes a housing sealing arrangement 215 shown sealed against a surrounding sealing ring 234 in housing 232 with a radially outwardly directed engagement. That is, housing seal ring 234 surrounds seal arrangement 215, a distinction from the arrangement described specifically for cartridge 1. It may be supplied as a preform in accordance with the foregoing descriptions.
[0167] Referring to Figure 20, the housing seal arrangement 215 includes a housing seal (typically compressible resilient material or ring) 216. The resilient material may be as previously characterized for the cartridge arrangement 1.
[0168] In Figure 20, a central axis X for the cartridge 201 is shown. In Y, a plane perpendicular to the central axis X is shown. The media package 202 extends around the X axis, defining an interior 202i. The media package 202 may extend cylindrically, with a circular cross-section, but alternatives are possible. For example, an oval configuration is possible. Also, whether circular or oval or some other shape, a construction tapered to the middle is possible. For example, the media package 202 may be configured to taper downwards in outer dimension, extending away from the end 203.
[0169] Analogously to the arrangements of Figures 1 to 19, as the sealing member 216 is typically formed from a compressible/resilient material, it is desirable to provide the sealing arrangement 215 with a sealing support. Cartridge 201 includes such sealing support as indicated at 220. Sealing support 220 is relatively rigid (compared to sealing member 216) and provides structural radial support for radial sealing member 216 to ensure element integrity. seal 216 and to provide structure against which the seal element 216 is radially compressed, in the example radially inwardly towards axis X), when the seal element 216 is radially engaged with a housing seal element 234. As with the previously described embodiment, the particular sealing support 220 is preferably represented as a structure that cannot be removed from the cartridge 201 once therein. This is also preferred in the case with respect to the sealing member 216. In the illustrated example, the sealing support 220 comprises an integral part or section of an end cap 208 (or end piece 219), together with the end cap section 219. end 221. Dimensions and sealing surface characteristics similar to those described above for seal 16 can be applied to member 216.
[0170] Typically, the only end cap portion 208 that forms a seal with housing member 234 is sealing member 216, on sealing surface 216S, again shown configured to form a radially directed seal. That is, preferably no part or material in end cap 208 (other than sealing member 216) is positioned to form a seal of any kind with housing 232 when cartridge 201 is installed.
[0171] Except for the direction of extension, typically the sealing bracket 220 may be analogous to the sealing bracket 20. Thus, it is preferably a solid continuous wall element in extension around the central axis X.
[0172] Still referring to Figure 20, note that the sealing support 220 is not positioned around the element 216 to provide the exact same type of protection during handling and shipment as the sealing support 20, Figure 1 However, support 220 is a relatively rigid element against which compressible element 216 is positioned, and thus provides some protection during handling and shipping, as well as a sealing advantage.
[0173] When cartridge 201 is installed in filter assembly 230 for use, a first end of cartridge 201, on which a sealing arrangement 215 is positioned, is against an end wall 232x of housing 232. It is preferred that such engagement have a resilience, for stable support of the 201 cartridge during equipment operation. This is analogous to the description with respect to cartridge 1 above, and similar dimensions and characteristics can be used. To provide this, cartridge 201, similarly to cartridge 1, includes an axial damping arrangement 225 positioned in endpiece 208 at a more axially remote location from middle end 203 than any other portion of endpiece 208. While alternatives are possible, the illustrated damping arrangement 225 shown is integrated with the resilient compressible member that forms the sealing member 216, and comprises the same material. The particular damping arrangement 225 shown projects axially beyond the end 220x of the sealing bracket 220, analogously to the damping arrangement 25 described above. Furthermore, it preferably comprises a plurality of spaced projections 225p (which may be analogous to projections 25p) separated by recesses 25r), although alternative shapes are possible. Note that in Figure 20, the projection 25p is shown to overlap with the end wall 232x of the housing 232, and indicates the amount of damping or compression that would likely occur after complete installation.
[0174] Of course, the opposite end cap 208, the cartridge 201 would include another end cap, analogous to the end cap 9 discussed above. This would typically be a closed end cap, although alternatives are possible. It can be formed analogously to the closed end caps previously described herein.
[0175] In Figure 21, a schematic fragmentary view of the cartridge 201 is shown, separated from the housing 232. Attention is directed to the casing 212. The casing 212 is shown not embedded in part 221 (Figure 20) of the endpiece 208 However, a molded end cap section or bellows analogous to bellows 21b, Figure 10, could be used to embed one end of liner 212. For the exemplified liner 212 shown, the option of an expanded metal liner is shown. As with the previously described modalities, alternatives are possible.
[0176] In Figure 21, the groove 248 is visible, which would be analogous to the previously described groove 48.
[0177] Figures 20 and 21 are intended to indicate an example of features that would typically result if the end cap arrangement is described in conjunction with Figures 1 to 19 were implemented with features that allow an outwardly directed radial seal. , as opposed to an inwardly directed radial seal. Of course, alternative specific details could be implemented. It is also noted that these drawings indicate alternatives in general principle, which could be applied with a variety of arrangements including the alternative cartridge arrangements described below in conjunction with Figures 22 to 46.
[0178] B. An additional exemplified embodiment, Figures 22-33
[0179] In Figures 22-33, drawings depicting the features generally analogously to those of Figures 1 to 19 are provided, but in an alternate embodiment in detail. Note that the characteristics and general principles, as well as the exemplified characteristics and dimensions, may be analogous to those applied and/or described in conjunction with Figures 1 to 19. In addition, the variations described above together with these figures can be applied . Furthermore, features analogous to those discussed above in conjunction with Figures 20 and 21 could be applied in the embodiment of Figures 22 to 33 when an outwardly directed radial seal is desired.
[0180] Reference numeral 301, Figure 22, then, represents an alternative filter cartridge incorporating features as described. Filter cartridge 301 comprises a media pack 302 including means 302m, which extends between the first and second ends of the means 303, 304. In the example, the media pack 302 is configured to extend around an interior open filter 305 and the central X axis.
[0181] The particular filter cartridge 301 shown can be used with outside-in flow during filtration, although alternatives are possible. Thus, it is configured to filter as the carrier fluid passes from the outer perimeter 302x to the inner perimeter 302i during filtration.
[0182] The illustrated cartridge 301 is configured with means 302 extending between the first and second end pieces 308, 309. The first end piece 308 is positioned at the first end 303 of the media pack 302 and generally comprises a "open end piece", i.e. end piece 308 has a central opening 310. When cartridge 301 is configured to flow from outside to inside during filtration, central opening 310 is an outlet opening for filter fluid leave the inside of the 305 cartridge.
[0183] As is typical for many applications, the second end piece 309, positioned at the second end 304 of the media pack 302, is closed to the passage of fluid therethrough, i.e., it is a closed end piece. Again, the principles described here can be applied in different applications, however, for example, those where the end piece 309 is opened or closed by an additional structure.
[0184] The depicted cartridge 301 is not shown with an internal coating analogous to the coating 12. However, such a coating could be applied with the cartridges in accordance with the present description. It is also the case, as described above, that if an internal support is required for the media package 302, it can be provided by a support within a housing, for example, by a security cartridge or other structure.
[0185] With further reference to Figure 22, the represented media package 302 is generally cylindrical. The principles described herein can be applied to alternative media packages including, for example, those that taper in length from end 303 to end 304; and/or, media packages that do not define a generally circular cross-section, e.g. those that define an oval cross-section).
[0186] Still referring to Figure 22, the cartridge 301 includes a housing seal arrangement 315. The housing seal arrangement 315 includes a housing seal 316 (typically a resilient compressible element 316) analogous to element 16, which has a sealing surface 316s and is positioned for releasable engagement with a portion of a filter assembly upon operation when installing the cartridge 301 for use. Materials similar to those described for housing 16 may be applied, in a manner analogous to that described above.
[0187] Analogously to the housing sealing element 16, a housing 316 is configured to form a "radially inwardly" directed seal. However, the features described may alternatively be applied with an "outward facing" seal, using variations on principles analogous to those described above in conjunction with Figures 20 and 21.
[0188] The housing seal arrangement 316 may be formed analogously to the seal arrangement 16 from similar materials of similar shapes and dimensions, and may be positioned within an assembly or cartridge 301 in an analogous manner.
[0189] Analogously to sealing member 16, sealing arrangement 315 is provided with radial support, by sealing support 320 similarly to sealing support 20. Sealing support 320 may be generally analogous to support 20 with respect to selected details and variations described above.
[0190] As described for previous embodiments, typically the only part of the end cap 308 that forms a seal with a housing member is the sealing member 316 configured to form a radially directed seal. That is, again, preferably no part of the material of the end cap 308, other than the sealing member 316, is positioned to form a seal of any kind with a housing member, when the cartridge 301 is installed. Again, although alternatives are possible, as described for the seal holder 20, the seal holder 320 is typically a solid, continuous element in extension around the central axis X. Furthermore, as discussed above for the cartridge 1, preferably, when the cartridge 301 is installed in the housing or filter assembly for use, a first end of the cartridge 301, on which the sealing arrangement 315 is positioned, is pressed against an end wall of the housing. It is preferable that when this occurs, the coupling has resilience. To provide this, cartridge 301, analogous to cartridge 1, includes an axial seal damping arrangement 325 analogous to damping arrangement 25. Damping arrangement 325 is positioned on endpiece 308 at a location axially furthest from the end of the barrel. means 304, end piece 309 and/or end of media pack 303, than any other part of end piece 308. This is typical for advantage, but not required in all cases. The exemplified damping arrangement 325 shown is integrated with a resilient compressible element forming element 316, and typically comprises the same material. The particular damping arrangement 325 shown projects axially beyond end 320x of sealing bracket 320 and comprises a plurality of spaced-apart projections 325p separated by recesses 325r.
[0191] In Figure 33, a perspective view of the cartridge 301 is provided, directed generally towards the end piece 309. While alternatives are possible, the end piece 309 can be seen as comprising a closed end piece molded in place on the end piece. end 304 of the media package 302. An axial projection arrangement 328, analogous to the axial projection arrangement 28, but different in detail, is shown configured to engage with a portion of a housing during installation of the cartridge 301. For the particular example, array 328 comprises a plurality of spaced projections, although it may be continuous for array 28.
[0192] In Figure 32, a schematic perspective view of an air cleaner assembly 330 for use with a filter cartridge in accordance with cartridge 301 is provided. Figure 32 should be understood to be schematic and a variety of specific housing features can be used. The filter assembly 330 depicted would typically be configured as an air cleaner assembly, but alternative applications are possible.
[0193] Referring to Figure 32, the filter assembly 330 comprises a housing 332 which comprises a housing body 333 and which would typically include a removable access cover 334. Access cover 334 is not shown in detail, but typically , would be removable from the remainder of the body 333. In general terms, upon removal of the access cover 334, an internally received cartridge 301 can be removed, or a cartridge 301 can be installed.
[0194] In 336, a flow tube (gas) is provided, allowing flow access to an interior of the housing body. The flow tube 336 described is an inlet tube when the assembly 330 is configured to flow from outside to inside through the cartridge during filtration. Of course, it could be an outflow pipe when an opposite flow direction is used.
[0195] Attention is now directed to Figure 31, a schematic cross-sectional view of filter assembly 330. Here, cartridge 301 can be installed with an interior 332i of housing 330. Note that cartridge 301 is shown schematically, and without resilient member 316, Figure 22. This is to allow internal details to be seen. It is noted that cartridge 301 would not typically be constructed without resilient member 316.
[0196] Referring to Figure 31, it is noted that the assembly 330 includes a central cartridge support 334. This support 334 would typically be a porous support. Although alternatives are possible, for example the support 334 is positioned close enough to the middle 302m that an inner lining is not necessary. Support 334 may be a permanent part of the housing, or a removable part. Holder 334 can be a part of a safety cartridge or safety filter, if desired.
[0197] Still referring to Figure 31, it is noted that cartridge 301 includes an optional outer shell 312x that surrounds the middle 302m. This provides protection to the media during handling, strength to the media package and integrity to the cartridge.
[0198] Still in relation to Figure 31, in 344, a sealing flange is represented, against which a part of the damping element 316, not represented in Figure 31, forms a radially inwardly directed seal during installation.
[0199] In Figure 31A, an enlarged fragmentary view of a part of Figure 30 is represented, with analogous features numbered with analogous reference numbers.
[0200] Parts of the cartridge 301 are visible in the cross-sectional view of Figure 27 and the enlarged fragmentary view of Figure 28. Selected parts discussed previously include: the media pack 302 having end 303 and end 304; exterior 302x and interior 302i of the media pack; the 312x outer shell; end piece 308 and end piece 309; and, the sealing arrangement 315 with the sealing member 316 and the sealing bracket 320. The damping arrangement 325 can be seen as having the tip 325t. Tip 325t can be seen to extend beyond end 320x of bracket 320. It can be seen to comprise projections 325p which are spaced apart by recesses 325r. Note that endpiece 308 does not include a groove analogous to groove 48, Figure 5. This is because the media pack support would have alternatively been molded, during molding, in regions indicated by spacing artifacts 380, Figures 27, 28 and 29.
[0201] With reference to Figures 27 and 28, it is noted that the surface or surface section 320i of the support 320 against which the seal 316 is pressed is inclined similarly to the surface 20i, except that the surface 320i begins the slope at a location spaced from the inner end 316a of the sealing member 316.
[0202] In particular and with reference to Figure 28, support 320 includes a base section 320b and an extension section 320e. Extension section 320e defines an inner wall section at 320i, which extends at an angle with respect to a plane perpendicular to the central axis X (the central axis X being shown in Figure 27).
[0203] The angle of extension of wall section 320i in region 320e may generally be analogous to that described above for section 20i. One problem shown in Figure 28 is that the base portion 320b is present and is relatively thick, with 380 spacing artifacts in it. This means that the sealing member 316 is also differently shaped so that it can properly snap into position. In particular, in region 316b, a damping base part 316 is shown engaging the wall section 320w of the base 320b.
[0204] Still with reference to Figure 28, in another way, support 320 and damping 316 may be analogous to those described above for cartridge 1. In particular, projections 325p are shown, separated by recesses 325r.
[0205] In Figure 29, a plan view of the end piece 308 is represented. Recesses or spacing artifacts 380 positioned around an outer perimeter of endpiece 308 are shown. These would be the locations where the molding would have included separations to support the media package when the support 320 was molded in place. Also, at 381, perimeter artifacts are shown, for mold sections that were used to keep the media package in the desired and proper shape, in this case round, during the molding of the end piece 308. Note that the Figure 29 is schematic, and representations of an end piece opposite end piece 308 are not shown.
[0206] In Figure 30, a side view of the cartridge 301 is schematically represented. Opposite end pieces 308, 309 can be seen in the media pack 302m.
[0207] Attention is now directed to Figures 23 to 26 in conjunction with an approach to assemble the cartridge 301. Figure 23 is generally analogous to Figure 17 and indicates various molds, mold features and components that are used (or formed) in the 301 cartridge production.
[0208] In Figure 24, a schematic cross-sectional view is shown of the molding process of the closed end piece 309. Here the mold section 390 is shown, which would have the appropriate resin positioned therein, to generate the end piece 309. Media package 302 is shown projecting into mold 390 such that molding of end piece 309 takes place directly at end of means 304. It is noted that positioning of appropriate features in mold 380 forms projections 348, Figure 23 .
[0209] In Figure 25, a schematic fragmentary view of a step of molding the end piece 308 is shown, the view is generally analogous to that of Figure 15, discussed above. The sealing member 316 will have been preformed and placed in the mold 391, along with an end portion of the media pack 303, before the molding section 320, with the support 320i. At 316o, the overlap shows how the two urethane sections would engage, in certain regions.
[0210] In Figure 26, a view analogous to Figure 13 discussed above is shown, depicting the preforming of the sealing member 316 in the mold 392 (as a preform for use in forming the endpiece 308). Element 316 would be removed from mold 390 and then inserted into mold 391, Figure 25, during cartridge construction.
[0211] C. An additional modality, Figures 34 to 46
[0212] In Figures 34 to 46, drawings generally analogous to those of Figures 1 to 19 are provided, but in an alternative embodiment with respect to details. It is noted that the features and general principles may be analogous to those applied and/or described in conjunction with Figures 1 to 19 and/or Figures 22 to 33. This includes analogous exemplified dimensions, materials and surface features. Furthermore, the variations described above in conjunction with the figures may apply. Furthermore, features analogous to those discussed above in conjunction with Figures 20 and 21 could be applied in the embodiment of Figures 34 to 46 when an outwardly directed radial seal is desired.
[0213] Reference numeral 401, Figure 34, then, represents an alternative filter cartridge incorporating features as described. Filter cartridge 401 comprises a media package 402 including media 402m, which extends between the first and second ends of media 403, 404. In the example, media package 402 is configured to extend around an interior open filter 405 and central axis X.
[0214] With reference to Figure 34, the media pack 402m (and cartridge 401) depicted is shown to be generally cylindrical. Alternatives are possible, as discussed above for other embodiments. For example, media pack 402 may taper in length between ends 403, 404 (or ends 404, 403). Furthermore, it can be configured with a non-circular transverse perimeter, for example an oval perimeter.
[0215] The particular filter cartridge 401 depicted may be used with outside-in flow during filtration, although alternatives are possible. Thus, it is configured to filter as the carrier fluid passes from the outer perimeter 402x to the inner perimeter 402i during filtration.
[0216] The illustrated cartridge 401 is configured with means 402 extending between the first and second end pieces 408, 409. The first end piece 408 is positioned at the first end 403 of the media pack 402 and generally comprises a " open end piece", i.e. the end piece 408 has a central opening 410. When the cartridge 401 is configured to flow from the outside in during filtration, the central opening 410 is an outlet opening for the filtered fluid to leave. the inside of the 405 cartridge.
[0217] As is typical for many applications, the second end piece 409, positioned at the second end 404 of the media package 402, is closed to the passage of fluid therethrough, i.e., it is a closed end piece. Again, the principles described here can be applied in different applications, however; for example, those where the end piece 409 is opened or closed by an additional structure.
[0218] Referring to the cross-sectional view of Figure 39, the illustrated cartridge 401 includes both an inner shell 412i and an outer shell 412X. Variations are possible depending on general system requirements. These variations would include the possibility of only one of the two coatings, or none as may be desired. The particular liners 402i, 402x depicted comprise expanded metal liners, but alternatives, e.g., plastic liners, are possible.
[0219] Referring again to Figure 34, the cartridge 401 includes a housing seal arrangement 415. The housing seal arrangement 415 includes a housing seal 416 (typically a typically resilient compressible element 416) analogous to elements 16, 216 and 316 positioned for releasable sealing engagement of the sealing surface 416s with a portion of a filter assembly upon operation when installing the cartridge 401 for use. Materials similar to those described for elements 6, 216 and 316 can be applied in an analogous manner.
[0220] Similar to housing seal elements 16 and 316, element 416 is configured to form a "radially inward" directed seal. However, the features described may alternatively be applied with an "outward facing" seal, using variations on principles analogous to those described above in conjunction with Figures 20 and 21.
[0221] The housing seal arrangement 416 may be formed as a preform analogously to the seal arrangements 16, 216 and 316 from similar materials and may be positioned within an assembly or cartridge 401 in an analogous manner. .
[0222] Similar to the sealing elements 16 and 316, the sealing arrangement 415 is provided with radial support, by a sealing bracket 420 similar to the sealing brackets 20, 320. The sealing bracket 420 may be generally analogous to the bracket 20 , 320 with respect to selected details and variations described above.
[0223] As described for previous embodiments, typically the only portion of the end cap 408 that forms a seal with a housing member is the sealing member 416 configured to form a radially directed seal. That is, again, preferably no part of the material of the end cap 408, other than the sealing member 416, is positioned to form a seal of any kind with a housing member, when the cartridge 401 is installed. Again, while alternatives are possible, as described for seal holders 20, 320, seal holder 420 is typically a solid continuous element in extension around the central axis X. Also, as discussed above for cartridges 1, 301, preferably when the cartridge 401 is installed in the housing or filter assembly for use, a first end of the cartridge 401, in which the sealing arrangement 415 is positioned, is pressed against an end wall of the housing. It is preferable that when this occurs, the coupling has resilience. To provide this, cartridge 401, analogous to cartridges 1, 301, includes an axial seal damping arrangement 425 analogous to damping arrangements 25, 325. Damping arrangement 425 is positioned on endpiece 408 at a more axially location. further away from the end of the means 404, the end piece 409 and/or the end of the media pack 403, than any other part of the end piece 408. This is typical for advantage, but not required in all cases . The exemplified damping arrangement 425 shown is integrated with a resilient compressible element forming element 416, and typically comprises the same material. The particular damping arrangement 425 shown projects axially beyond end 420x of sealing bracket 420 and comprises a plurality of spaced-apart projections 425p separated by recesses 425r.
[0224] In Figure 46, a perspective view of the cartridge 401 is provided directed generally towards the end piece 409. While alternatives are possible, the end piece 409 can be seen as comprising a closed end piece molded in place at the end. 404 of media pack 402. An axial projection arrangement 328, analogous to axial projection arrangements 28, 328, is not shown, but could be used. A damping arrangement comprising a ring 428r is shown.
[0225] In Figure 45, a schematic perspective view of an air cleaner assembly 430 for use with a filter cartridge in accordance with cartridge 401 is provided. Figure 42 should be understood to be schematic and a variety of specific housing features can be used. The filter assembly 430 depicted would typically be configured as an air cleaner assembly, but alternative applications are possible.
[0226] Referring to Figure 42, the filter assembly 430 comprises a housing 432 comprising a housing body 433 and a removable access cover 434. Generally speaking, upon removal of the access cover 434, a cartridge received internally 401 can be removed, or a 401 cartridge can be installed.
[0227] In 436, a flow tube (gas) is provided along for full access to an interior housing body. The flow tube 436 shown is an inlet tube when the assembly 430 is configured to flow from outside to inside through the cartridge during filtration. Of course, it could be an outflow pipe, with an opposite flow direction.
[0228] Attention is now directed to Figure 43, a schematic cross-sectional view of filter assembly 430. Here, cartridge 401 can be installed with an interior 432i of housing 430. Cartridge 401 is installed with sealing member 416 surrounding, and in sealing engagement with, sealing ring 440, in a releasable sealing manner. Since the sealing ring 440 is surrounded by the sealing member 416, the seal is an inwardly directed radial seal. Of course, the principles described here for forming an outwardly directed radial seal could alternatively be used.
[0229] Still with reference to Figure 43, the depicted assembly 430 is also shown having a removable security element 500, sealed with an outwardly directed radial seal 501.
[0230] For the particular assembly shown, seal 406 and seal 501 are sealed on opposite sides of the same bracket 440. This is typical, but alternatives are possible. It is also noted that in Figures 43 and 44, the seals are shown superimposed on the support 440. This indicates an amount of compression that has occurred during installation.
[0231] In Figure 44, an enlarged fragmentary view of a part of Figure 43 is represented, with analogous features numbered with analogous reference numbers.
[0232] Portions of cartridge 401 are visible in the cross-sectional view of Figure 39 and the enlarged fragmentary view of Figure 40. Selected parts discussed previously include: the media pack 402 having end 403 and end 404; exterior 402x and interior 402i of the media pack; coatings 412x, 412i; end piece 408 and end piece 409; the sealing arrangement 415 with the sealing member 416, the sealing surface 416s of the sealing bracket 420. Also, the damping arrangement 425 can be seen as having the tip 425t. Tip 425t can be seen to extend beyond end 420x of bracket 420. It can be seen to comprise projections 425p which are spaced apart by recesses 425r. Note that endpiece 408 does not include a groove analogous to groove 48, Figure 5. This is because support was provided, during molding, in regions indicated by spacing artifacts 480, Figures 38, 40, and 49.
[0233] With respect to Figures 39 and 40, it is noted that the surface or surface section 420i of the support 420 against which the seal 416 is pressed is not inclined towards the central axis X, Figure 39, as the surface 20i. Preferably, in the example, surface 420i is inclined less than 5° with respect to the X axis, typically less than 4°. In fact, in some cases, the 420i surface can be configured to not tilt. However, typically it will tilt at least 0.1°, usually at least 0.3°, and often at least 0.5°.
[0234] Thus, relative to a plane perpendicular to the central axis X (a plane analogous to the Y plane discussed above), the surface 420i extends at an angle of typically not less than 85°, and generally not less than 86° In fact, the extension angle can be a relatively small or non-existent angle. However, typically, at least a small angle of inclination, for example at least 0.1°, will be preferred as it helps form a pocket to secure the element 416 and provide convenient molding of the shape and outer surface of the element. 416, which would typically be formed including an angle of inclination for release.
[0235] It is also noted that the variation discussed above in conjunction with the cartridge 301 can be applied, and that different interior parts of the support 420 can extend at different angles.
[0236] In Figure 41, a plan view of the end piece 408 is represented. Recesses or spacing artifacts 480 positioned around an outer perimeter of endpiece 408 are shown. These would be locations where the molding included separations, to support the media pack when the support 420 was molded in place. Furthermore, at 481, perimeter artifacts are represented, from mold sections that were used to keep the media package in a proper shape, in this case round, during the molding of the end piece 408. Note that the Figure 41 is schematic, and representations of an end piece opposite end piece 408 are not shown.
[0237] In Figure 42, a side view of the cartridge 401 is schematically represented. Opposite end pieces 408, 409 can be seen on the media package 402m.
[0238] Attention is now directed to Figures 35 through 38 in conjunction with an approach to cartridge assembly 401. Figure 43 is generally analogous to Figure 17 and indicates the various molds, features and mold components that were used (or formed) in the production of the 401 cartridge.
[0239] In Figure 36, a schematic cross-sectional view is shown of the process of molding the closed end piece 409. Here, the mold section 490 is shown, which would have the appropriate resin positioned there, to generate the end piece 409 Media package 402 is shown projecting into mold 490 so that molding of end piece 409 occurs directly at end of means 404. Note the placement of appropriate features in mold 480 to form ring 448r.
[0240] In Figure 37, a schematic fragmentary view of a step of molding the end piece 408 is shown, the view being generally analogous to that of Figure 15, discussed above. The sealing member 416 will have been preformed and placed in the mold 491, along with a part of the end media pack 403, before the molding section 420, with the surface support 420i. At 416o, the overlap shows how the two urethane sections could engage.
[0241] In Figure 38, a view analogous to Figure 13 discussed above is shown, depicting the preforming of the sealing member 416 in the mold 492 to use a preform to form the end piece 408. The member 416 would be removed. mold 492 and then inserted into mold 391, Figure 37, during construction of cartridge 401.
[0242] D. Some selected observations regarding the modalities of Figures 20 to 46
[0243] The embodiments of Figures 20 to 46 indicate possible variations with the principles described above in relation to the embodiment of Figures 1 to 19. Similar materials, dimensions, characteristics and surface shapes can be applied between the various embodiments. Thus, the features shown in any of the modes can be applied with the features shown in the others. Furthermore, general characterizations of dimensions, materials, shapes, etc. of one modality or description can be applied to the others.
[0244] Again, there is no specific requirement that the features be applied to obtain all the same advantages as can be applied with maximum application of the principles described here.
[0245] VI. Summary and Observations
[0246] In accordance with one aspect of the present description, a filter cartridge is provided. The filter cartridge generally comprises a media pack including media having one end. The media pack may be configured around an open filter interior.
[0247] A first end piece having a central opening therethrough is provided at the end of the media pack. The first end piece may be molded in place at the end of the media pack to completely enclose the end of the media pack and to have means embedded therein.
[0248] The end piece generally includes an end cap section and a seal support section. The sealing support section can optionally and advantageously be configured to define a sealing recess in cooperation with the end cap section.
[0249] The seal support section protrudes axially from the media pack and the middle. In some cases, the projection is not parallel to a central axis through the central opening. In many cases, it leans toward or away from the center opening and shaft. That is, in some cases, the sealing support section defines a sealing support wall that slopes radially in extension away from the end cap section to define a sealing recess. In alternative applications, the bracket may extend parallel to a central axis.
[0250] In a typical arrangement, the end cap section and the seal support section are integrated together and molded in place.
[0251] A housing sealing element is positioned in the first end piece, for example in the sealing recess, if present. Typically, it is not removably secured within the sealing recess, and configured to form a radially directed seal with a housing member when the filter cartridge is installed for use. The housing sealing member may be configured to form a radially inwardly directed seal with a sealing member, or a radially outwardly directed seal with a housing sealing member. Typically, the sealing bracket is positioned so that when a housing sealing member forms a radially directed seal, it is compressed between the housing member and the housing sealing bracket.
[0252] In some examples, the gasket support typically defines a wall or gasket support wall section that slopes radially in extension out of the end cap section at an acute wall angle within the range of 30° to 80°. °, inclusive. In another example, it is an angle of 90°, or nearly 90°, for example (at least 85°, typically at least 86°, often 87° or more).
[0253] Typically, the end piece is molded in place at a first end of the media package and defines a radial sealing bracket while being molded to secure the housing sealing member (provided as a pre-assembled housing sealing member). -formed) in place on the cartridge and media pack.
[0254] Typically, the media package (and the means) surrounds and defines an open filter interior with a central axis coaxial with a central axis of the opening through the first endpiece and seal. Typically, the end cap section extends completely through and closes off the first end of the media and media package. Typically, the first end cap section and the seal support section are molded integral with each other. Also, typically, the middle is pleated. Again, in some cases, an acute angle of extension of the support wall is within the range of 30° to 80°, inclusive, in extension axially outward from the support, and an end cap section with respect to a plane perpendicular to a central axis. In some cases, more typically, this angle is within the range of 45° to 80°, often 50° to 80°, and in many cases 55° to 75°, inclusive, as an example, 60° to 75°, inclusive. . Alternatives are described.
[0255] Typically, the housing sealing member comprises a portion of a resilient compressible member having a sealing surface. The resilient compressible member may be configured to extend axially further from the middle than from the sealing support, advantageously. When this is the case, typically an amount of further extension is at least 2 mm, usually at least 4 mm, and often at least 5 mm.
[0256] The tip of the resilient (and typically compressible) element remote from the middle may be configured to include a plurality of spaced-apart projections that extend axially away from the middle. Preferably, the portion of the resilient (and typically compressible) element adjacent the tip comprises a plurality of projections and separating recesses, with both portions of the projections and portions of the recesses comprising material of the resilient element extending axially further away from the middle. than any part of this sealing bracket.
[0257] In a described example, the media pack or medium has an outer perimeter and the projection of the end cap on the first end piece does not extend radially beyond an adjacent part of the outer perimeter of the media pack farther than 2 mm, typically further than 1.5 mm and preferably even further than 1 mm. This can be applied with any of the characteristics of any of the modalities.
[0258] Furthermore, typically, the media pack has an inner perimeter, and the end cap section adjacent to the first endpiece does not extend radially beyond an adjacent portion of the inner perimeter of the middle or the wider media pack. farther than 3mm, typically farther than 2mm and often farther than 1.5mm (in fact no more than 1mm is preferred). This can be applied with the characteristics of any of the described modalities.
[0259] In a described example, the first end piece comprises a molding having a molded density of at least 0.4 g/cc; typically at least 0.46 g/cc; and often a density within the range of 0.51 to 0.63 g/cc, inclusive. Typically, the first end piece comprises a molding that has a Shore A hardness of at least 30, typically at least 35, generally not more than 75, and often within the range of 40 to 60, inclusive. The features can be applied to any of the described modalities.
[0260] Typically, the sealing member comprises a molding having a density not greater than 0.32 g/cc, typically not greater than 0.24 g/cc. It typically comprises a molding having a Shore A hardness of not more than 20, typically not more than 18, and often within the range of 10 to 18, inclusive. The features can be applied to any of the described modalities.
[0261] Typically, when made together, the first end piece comprises a first molding having a first density and the sealing member comprises a second molding having a second density, the first density being greater than the second density, typically, at least 0.08 g/cc greater, usually at least 0.2 g/cc greater. The features can be applied to any of the described modalities.
[0262] Typically, the sealing element defines a sealing surface, i.e. a surface that engages a part of a housing, in use, with an axial extension length of at least 5 mm, typically at least 10 mm, and preferably at least 12 mm, where the sealing surface does not have a radial step in this section. Typically, the sealing member surrounds and defines a cartridge center axis, and the sealing member defines a sealing surface section that engages a housing structure to form an in-use seal that extends at an angle thereto. , with respect to a plane perpendicular to the cartridge's central axis, of at least 80°, typically at least 83°, often at least 85°, and typically within the range of 85° to 89.9°, inclusive, for example 88° to 89.7°, often 89.3° to 89.7°. The features can be applied to any of the described modalities.
[0263] In a typical example, the housing sealing member has a first part having a first thickness radial from the sealing surface to the sealing support section; and, a second portion having a second radial thickness from the sealing surface to the sealing support section. Typically, the second radial thickness is at least 4mm greater, typically at least 5mm greater than the first radial thickness. Also, typically the part with a second radial thickness is closer to the middle than is the part with the first radial thickness. As discussed above, an advantage thereof is that it can allow convenient swinging of the cartridge when it engages with the housing for ease of removal/installation. The features can be applied to any of the described modalities.
[0264] Typically, the first radial thickness is at least 7 mm, generally at least 9 mm.
[0265] In a described example, a central cladding is provided, for example an expanded cladding. In an alternative application, the center liner may be plastic. In some applications, center coating can be avoided. In a typical application, the first end piece defines a circular outer perimeter, and a circular central opening, although in each case alternatives are possible.
[0266] In an exemplified arrangement described, a second end piece is positioned at an end of the media pack opposite the first end piece. The second end piece may be molded in place, and will typically be a closed end cap, although alternatives are possible. In a described example, the second end piece has a density of at least 0.4 g/cc, typically at least 0.46 g/cm, but alternatives are possible.
[0267] Typically, the first end piece comprises a thermoplastic elastomer and a sealing member comprises a thermoplastic elastomer, each of which is formed from a thermoplastic elastomer generally related to an elastomer of the other. In one example described, each is formed from polyurethane.
[0268] Here, a filter assembly is generally described which comprises a housing having a filter cartridge in accordance with the characterizations of filter cartridges described herein, removably installed in an interior of the housing and sealed radially to a component of the accommodation. The filter assembly may, for example, comprise an air purifier assembly.
[0269] Here, the methods of forming a filter cartridge are described. The methods generally involve molding in place, on a media pack at a location that extends between the media pack and a housing sealing member, an end piece having a central opening. When this is practised, the end piece generally includes an end cap section attached to the media pack at the first end of the media pack and a radial sealing support section for the sealing member of the housing. The molding step includes non-removably securing the housing sealing member to the endpiece.
[0270] In a typical approach, the molding step comprises positioning a preformed housing sealing element in a mold along with resin to a mold end piece and positioning a middle end in the mold.
[0271] Advantageous filter cartridges made in accordance with this process are described. Among the various advantageous subjects described are the following:
[0272] 1. Filter cartridge, characterized in that: (a) a media pack includes media having a first end; (b) an end piece having a first end of the means embedded therein and defining a radial sealing bracket; and (c) a pre-formed housing sealing member non-removably attached to the endpiece; (i) the end piece being molded into place in the middle while holding the housing sealing member in place.
[0273] 2. Filter cartridge, characterized by: (a) a media pack including media and having a first end; (b) a first end piece having a central opening therethrough and a media pack end therein; the end piece comprising: (i) an end cap section adjacent the first end of the media pack; and (ii) a sealing support section defining a sealing recess; (A) the seal support section projecting away from the media package, the direction of extension typically being generally axially; and, (B) the sealing support section defining a sealing support wall with a portion that slopes radially in an extending direction away from the end cap section to define the sealing recess; and, (iii) the end cap section and the seal support section being integral with each other; and, (c) a housing sealing member removably secured within the sealing recess and configured to form a radially directed seal with a housing member when the filter cartridge is installed for use.
[0274] 3. Filter cartridge characterized by: (a) a media pack comprising media and having a first end; (b) a first end piece including: (i) an open lid section; and, (ii) a sealing bracket defining a wall having a portion that slopes radially in extension out of the end cap section at an acute wall angle of at least 30° (often within the range of 30° to 80°, inclusive) to form a sealing recess, and (c) a housing sealing member removably secured within the sealing recess and configured for a radially directed seal with a housing member when the filter cartridge is installed for use.
[0275] 4. Filter cartridge, according to any one of characterizations 2 and 3, wherein: (a) the first end piece includes the first end of the means incorporated therein.
[0276] 5. A filter cartridge, according to any one of characterizations 2 to 4, wherein: (a) the first end piece is molded in place in the media pack and housing sealing member.
[0277] 6. A filter cartridge, according to any one of characterizations 1 to 5, wherein: (a) the housing sealing member comprises a portion of a resilient member having a sealing surface; (i) resilient member that extends axially farther from the media pack than from the sealing bracket.
[0278] 7. Filter cartridge, according to characterization 6, wherein: (a) the sealing bracket extends to a sealing tip remote from the media package; and, (b) the resilient member extends to a remote end from the media package; (i) the tip of the resilient sealing member remote from the medium comprising a plurality of spaced-apart projections extending axially away from the media package.
[0279] 8. Filter cartridge according to characterization 7, where: (a) a portion of the tip of the resilient element between the spaced projections also extends axially further from the media package than the support of sealing.
[0280] 9. Filter cartridge, according to any one of characterizations 6 to 8, wherein: (a) at least a portion of the resilient member extends axially at least 5 mm beyond the sealing bracket.
[0281] 10. A filter cartridge, comprising: (a) a package of media including media having a first end; (b) a first end piece having a central opening therethrough and a sealing support section defining a sealing support wall that extends in a direction away from the media pack; (c) a housing seal formed from a radially directed seal with a housing member, when the filter cartridge is installed for use; (i) the housing sealing member comprises a resilient member having a tip remote from the media pack; the tip of the resilient member comprises a plurality of spaced-apart projections; and, (ii) the spaced projections, and an end of the resilient member positioned between the spaced projections, extending axially to a location beyond the sealing bracket, in a direction away from the middle.
[0282] 11. Filter cartridge, according to characterization 10, where: (a) the sealing support section defines a wall that slopes radially in extension away from the middle.
[0283] 12. A filter cartridge, according to any one of characterizations 1 to 11, wherein: (a) the sealing support has a sealing support wall that surrounds a sealing recess; (b) the outer wall of the sealing bracket slopes radially inwardly in extension away from the end cap section; and, (c) the housing sealing member is configured to form a radially inwardly directed seal with a housing member when the filter cartridge is installed for use.
[0284] 13. Filter cartridge according to any one of characterizations 1 to 12, wherein: (a) the media package surrounds and defines an open filter interior.
[0285] 14. Filter cartridge according to any one of characterizations 1 to 13, wherein: (a) the end piece includes an end cap section that extends completely through and closes off the first end of the package of means.
[0286] 15. Filter cartridge according to any one of characterizations 1 to 14, wherein: (a) the end piece includes an end cap section and a sealing support section, which are molded integrally with each other .
[0287] 16. Filter cartridge, according to any one of characterizations 1 to 15, where: (a) the first end piece is molded in place.
[0288] 17. A filter cartridge, according to any one of characterizations 1 to 16, wherein: (a) the media package surrounds and defines a central axis of the cartridge; and, (b) the sealing bracket includes a wall section or supporting wall that extends, relative to a plane perpendicular to the central axis, at an acute angle within the range of 30° to 80°, inclusive, to the extent axially away from the media pack.
[0289] 18. A filter cartridge, according to any one of characterizations 1 to 17, wherein: (a) the media package surrounds and defines a central axis of the cartridge; and, (b) the sealing bracket includes a supporting wall that extends, with respect to a plane perpendicular to the central axis, at an acute angle of at least 45° (for example, within the range of 45° to 80° , inclusive) extending axially away from the media package.
[0290] 19. A filter cartridge, according to any one of characterizations 1 to 18, wherein: (a) the media package surrounds and defines a central axis of the cartridge; and, (b) the sealing bracket includes a supporting wall that extends, relative to a plane perpendicular to the central axis, at an acute angle of at least 50° (for example, within the range of 50° to 80° , inclusive) extending axially away from the media package.
[0291] 20. Filter cartridge, according to any one of characterizations 1 to 19, wherein: (a) the media package surrounds and defines a central axis of the cartridge; and, (b) the sealing support includes a sealing support wall that extends, with respect to a plane perpendicular to the central axis, at an acute angle within the range of 55° to 75°, inclusive, in extension axially to away from the media pack.
[0292] 21. A filter cartridge, according to any one of characterizations 1 to 20, wherein: (a) the media package surrounds and defines a central axis of the cartridge; and, (b) the sealing support includes a sealing support wall that extends, with respect to a plane perpendicular to the central axis, at an acute angle within the range of 60° to 75°, inclusive, in extension axially to away from the media pack.
[0293] 22. Filter cartridge, according to any one of characterizations 1 to 21, where: (a) the media package has an outer perimeter; and, (b) the end cap section of the first end piece does not extend radially beyond an adjacent portion of the outer perimeter of the media pack not more than 2 mm.
[0294] 23. Filter cartridge, according to any one of characterizations 1 to 22, where: (a) the media package has an outer perimeter; and, (b) the end cap section of the first end piece does not extend radially beyond an adjacent portion of the outer perimeter of the media pack not more than 1.5 mm.
[0295] 24. Filter cartridge according to any one of characterizations 1 to 23, where: (a) the media package has an inner perimeter; and, (b) the end cap section of the first end piece does not extend radially beyond an adjacent part of the inner perimeter of the media pack not more than 2 mm.
[0296] 25. Filter cartridge, according to any one of characterizations 1 to 24, where: (a) the media package has an inner perimeter; and, (b) the end cap section of the first end piece does not extend radially beyond an adjacent portion of the inner perimeter of the media pack not more than 1.5 mm.
[0297] 26. A filter cartridge, according to any one of characterizations 1 to 25, wherein: (a) the first end piece comprises a molding having a density of at least 0.4 g/cc.
[0298] 27. A filter cartridge, according to any one of characterizations 1 to 26, wherein: (a) the first end piece comprises a molding having a density of at least 0.46 g/cc.
[0299] 28. Filter cartridge according to any one of characterizations 1 to 27, wherein: (a) the first end piece comprises a molding having a density within the range of 0.51 to 0.63 g/cc , including.
[0300] A filter cartridge according to any one of claims 1 to 28, wherein: (a) the first end piece comprises a molding having a Shore A hardness of at least 30.
[0301] 30. Filter cartridge according to any one of characterizations 1 to 29, wherein: (a) the first end piece comprises a molding having a Shore A hardness of at least 35.
[0302] 31. Filter cartridge according to any one of characterizations 1 to 30, wherein: (a) the first end piece comprises a molding having a Shore A hardness of not more than 75.
[0303] 32. A filter cartridge, according to any one of characterizations 1 to 31, wherein: (a) the sealing member comprises a molding having a density of not more than 0.32 g/cc.
[0304] 33. Filter cartridge according to any one of characterizations 1 to 32, wherein: (a) the sealing member comprises a molding having a Shore A hardness of not more than 20.
[0305] 34. Filter cartridge according to any one of characterizations 1 to 33, wherein: (a) the sealing member comprises a molding having a Shore A hardness of not more than 18.
[0306] 35. A filter cartridge, according to any one of characterizations 1 to 34, wherein: (a) the sealing member comprises a molding having a hardness of Shore A within the range of 10 to 18, inclusive.
[0307] 36. A filter cartridge, according to any one of characterizations 1 to 35, wherein: (a) the first end piece comprises a first molding having a first density; and, (b) the sealing member comprises a second mold having a second density; (i) the first density being greater than the second density.
[0308] 37. Filter cartridge, according to characterization 36, where: (a) the first density is at least 0.08 g/cm higher than the second density.
[0309] 38. Filter cartridge, according to characterization 37, where: (a) the first density is at least 0.2 g/cc higher than the second density.
[0310] 39. Filter cartridge according to any one of characterizations 1 to 38, wherein: (a) the sealing member defines a sealing surface having a sealing surface section with an axial extension length of at least 10 mm without a radial step on it.
[0311] 40. Filter cartridge according to any one of characterizations 1 to 38, wherein: (a) the sealing member defines a sealing surface having a sealing surface section with an axial extension length of at least 12 mm without a radial step on it.
[0312] 41. Filter cartridge, according to any one of characterizations 1 to 40, where: (a) the medium surrounds and defines a central axis of the cartridge; and, (b) the sealing member defines a sealing surface that extends at an angle, relative to a plane perpendicular to the cartridge's central axis, of at least 80°.
[0313] 42. Filter cartridge, according to any one of characterizations 1 to 41, where: (a) the medium surrounds and defines a central axis of the cartridge; and, (b) the center sealing surface extends at an angle to a plane perpendicular to the cartridge center axis, within the range of 85° to 89.9°, inclusive.
[0314] 43. A filter cartridge, according to any one of characterizations 1 to 42, wherein: (a) the housing sealing member has a first portion having a first radial thickness for the sealing support section; and, (b) the housing sealing member has a second portion having a second radial thickness for the sealing support section; (i) the second radial thickness being at least 4 mm greater than the first radial thickness.
[0315] 44. A filter cartridge, according to any one of characterizations 1 to 43, wherein: (a) the housing sealing member has a first portion having a first radial thickness for the sealing support section; and, (b) the housing sealing member has a second portion having a second radial thickness for the sealing support section; (i) the second radial thickness being at least 5 mm greater than the first radial thickness.
[0316] 45. Filter cartridge, according to any one of characterizations 43 and 44, where: (a) the first radial thickness is at least 7 mm.
[0317] 46. Filter cartridge, according to any one of characterizations 43 to 45 where: (a) the first radial thickness is at least 9 mm.
[0318] 47. Filter cartridge, according to any one of characterizations 1 to 46, where: (a) the medium is pleated.
[0319] 48. Filter cartridge according to any one of characterizations 1 to 47, where: (a) the medium surrounds a central liner.
[0320] 49. Filter cartridge, according to characterization 48, where: (a) the center liner is a metal liner.
[0321] 50. Filter cartridge, according to any one of characterizations 1 to 49, where: (a) the first end piece defines a circular outer perimeter.
[0322] 51. Filter cartridge according to any one of characterizations 1 to 50, where: (a) the first end piece defines a circular central opening.
[0323] 52. Filter cartridge according to any one of characterizations 1 to 51, wherein: (a) a second end piece is positioned at a middle end opposite the first end piece.
[0324] 53. Filter cartridge, according to characterization 52, wherein: (a) the second end piece has a middle end recessed therein and is molded in place.
[0325] 54. Filter cartridge, according to any one of characterizations 52 and 53, wherein: (a) the second end piece is a closed end cap.
[0326] 55. Filter cartridge according to any one of characterizations 52 to 54 wherein: (a) the second end piece has a density of at least 0.4 g/cc.
[0327] 56. Filter cartridge according to any one of characterizations 52 to 55 wherein: (a) the second end piece has a density of 0.46 g/cc.
[0328] 57. A filter cartridge, according to any one of characterizations 1 to 56, wherein: (a) the first end piece comprises polyurethane; and, (b) the housing sealing member comprises polyurethane.
[0329] 58. A filter assembly, characterized in that it comprises: (a) a housing; and, (b) a filter cartridge according to any one of claims 1 to 57, operatively positioned within the housing.
[0330] 59. Filter assembly, in accordance with characterization 58, where: (a) the housing includes a sealing flange; and, (b), the filter cartridge is configured with a radially inwardly directed seal positioned around the sealing flange.
[0331] 60. Filter assembly, in accordance with Characterization 56, wherein: (a) the filter housing includes a sealing flange; and, (b), the filter cartridge is configured with a seal directed radially outward and positioned surrounded by the sealing flange.
[0332] 61. A method of forming a filter cartridge, characterized by: (a) molding in place the end piece, in a medium at a location that extends between the medium and a housing sealing element, the end piece end having a central opening and comprising: (i) an end cap section secured to the middle at a first end of the middle; and, (ii) a radial sealing support section for the housing sealing member; (b) the step of molding including non-removably attaching the housing sealing member to the endpiece.
[0333] 62. Method, according to characterization 60, where: (a) the molding step comprises: (i) positioning a pre-formed housing sealing element, a middle end and the resin to the part of end in a mould.
[0334] 63. Filter cartridge prepared in accordance with any of characterizations 61 and 62.
[0335] 64. Filter cartridge, according to characterization 2, wherein: (a) the seal support sections extend radially at an acute angle within the range of 30° to 80°, inclusive, to form the sealing recess.
[0336] 65. Filter cartridge, according to characterization 2, where: (a) the housing sealing element is preformed; and, (i) the first end piece is a molded-in-place end piece in the middle while holding the pre-formed housing sealing member in place.
[0337] 66. Filter cartridge according to Characterization 2, wherein: (a) the housing sealing member comprises a portion of a resilient member having a sealing surface; (i) the resilient member extends axially farther from the media package than from the sealing bracket.
[0338] 67. Filter cartridge, in accordance with Characterization 64, wherein: (a) the sealing support extends to a sealing support tip remote from the media pack; and (b) the resilient member extends to a remote end from the media package; (i) the tip of the resilient sealing member remote from the middle comprises a plurality of spaced-apart projections extending axially away from the media package.
[0339] 68. Filter cartridge according to characterization 2, where: (a) a portion of the tip of the resilient element between the spaced projections also extends axially further from the media package than does the support of sealing.
[0340] 69. Filter cartridge, in accordance with Characterization 68, wherein: (a) the sealing support wall slopes radially inwardly in extension away from the end cap section; and, (b) the housing sealing member is configured to form a radially inwardly directed seal with a housing member when the filter cartridge is installed for use.
[0341] 70. Filter cartridge, in accordance with Characterization 68, wherein: (a) the media package surrounds and defines an open filter interior.
[0342] 71. Filter cartridge, in accordance with Characterization 68, wherein: (a) the end piece includes an end cap section that extends completely through and closes off the first end of the media pack.
[0343] 72. Filter cartridge according to Characterization 2, wherein: (a) the first end piece includes an end cap section and a seal support section which are molded integrally with each other.
[0344] 73. A filter cartridge, according to any one of characterizations 1 to 57, wherein: (a) the media package surrounds and defines a central axis of the cartridge; and, (b) the sealing bracket includes a supporting wall that extends, with respect to a plane perpendicular to the central axis, at an acute angle within the range of 45° to 80°, inclusive, in extension axially away from the media package.
[0345] 74. Filter cartridge, according to characterization 2, where: (a) the media package has an outer perimeter; and, (b) the end cap section of the first end piece does not extend radially beyond an adjacent portion of the outer perimeter of the media pack not more than 2 mm.
[0346] 75. Filter cartridge, according to characterization 2, where: (a) the media package has an inner perimeter; and, (b) the end cap section of the first end piece does not extend radially beyond an adjacent part of the inner perimeter of the media pack not more than 2 mm.
[0347] 76. Filter cartridge, according to characterization 2, wherein: (a) the first end piece comprises a molding having a density of at least 0.4 g/cc.
[0348] 77. Filter cartridge according to characterization 76, wherein: (a) the sealing element comprises a molding having a density not greater than 0.32 g/cc.
[0349] 78. Filter cartridge, according to Characterization 2, wherein: (a) the first endpiece comprises a first molding having a first density; and, (b) the sealing member comprises a second mold having a second density; (i) the first density being greater than the second density.

权利要求:
Claims (13)
[0001]
1. Filter cartridge (1, 301, 401), CHARACTERIZED in that it comprises: (a) a package of media (2, 302, 402) including media (2, 302, 402m) and having a first end (3 , 303, 403); (b) a first end piece (8, 308, 408) having a central opening (10, 310, 410) therethrough and a media pack end incorporated therein; the end piece comprising: (i) an end cap section (21) adjacent the first end of the media pack (3, 303, 403); and (ii) a sealing support section (20, 320, 420) defining a sealing recess (16x); (A) the sealing support section (20, 320, 420) projects away from the media package (2, 302, 402); and, (B) the seal support section (20, 320, 420) defining a seal support wall (120, 320, 420) with a portion that slopes radially in a direction extending away from the section. end cap (21) to define the sealing recess (16x); and, (iii) the end cap section (21) and the seal support section (20, 320, 420) being integral with each other; and, (c) a housing sealing member (16, 316, 416) non-removably secured within the sealing recess (16x) and configured to form a radially directed seal with a housing member when the filter cartridge (1, 301, 401) is installed for use; (d) the sealing support having a sealing support wall (120, 320, 420) surrounding the sealing recess (16x); (e) the seal supporting wall slopes radially inwardly extending away from the end cap section (21); and, (f) the housing sealing member (16, 316, 416) is configured to form a radially inwardly directed seal with a housing member when the filter cartridge (1, 301, 401) is installed for use .
[0002]
2. Filter cartridge (1, 301, 401), according to claim 1, CHARACTERIZED in that: (a) the housing sealing element (16, 316, 416) comprises a part of a resilient element having a sealing surface; (1) resilient member extending axially further from the media pack (2, 302, 402) than the sealing bracket.
[0003]
3. Filter cartridge (1, 301, 401), according to claim 2, CHARACTERIZED by the fact that: (a) the sealing support extends to a sealing support tip remote from the media pack ( 2, 302, 402); and, (b) the resilient member extends to a remote end from the media pack (2, 302, 402); (1) the tip of the resilient sealing member remote from the middle (2, 302, 402m) comprising a plurality of spaced-apart projections extending axially away from the media pack (2, 302, 402).
[0004]
4. Filter cartridge (1, 301, 401), according to claim 3, CHARACTERIZED by the fact that: (a) a portion of the tip of the resilient element between the spaced projections also extends axially further of the media pack (2, 302, 402) than the sealing bracket.
[0005]
5. Filter cartridge (1, 301, 401) according to any one of claims 1 to 4, CHARACTERIZED in that: (a) the media package (2, 302, 402) surrounds and defines an interior of open filter.
[0006]
6. Filter cartridge (1, 301, 401) according to any one of claims 1 to 5, CHARACTERIZED in that: (a) the end piece includes an end cap section (21) that extends completely through, and closes, the first end of the media package (3, 303, 403).
[0007]
7. Filter cartridge (1, 301, 401) according to any one of claims 1 to 6, CHARACTERIZED by the fact that: (a) the media package (2, 302, 402) surrounds and defines a central axis of the cartridge; and, (b) the sealing bracket includes a wall section or supporting wall that extends, relative to a plane perpendicular to the central axis, at an acute angle within the range of 30° to 80°, inclusive, to the extent axially away from the media pack (2, 302, 402).
[0008]
8. Filter cartridge (1, 301, 401), according to any one of claims 1 to 7, CHARACTERIZED by the fact that: (a) the media package (2, 302, 402) surrounds and defines a central axis of the cartridge; and, (b) the sealing bracket includes a supporting wall that extends, with respect to a plane perpendicular to the central axis, at an acute angle of at least 45° in extension axially away from the media package (2, 302). , 402).
[0009]
9. Filter cartridge (1, 301, 401) according to any one of claims 1 to 8, CHARACTERIZED in that: (a) the first end piece (8, 308, 408) comprises a first mold having a first density; and, (b) the sealing member comprises a second mold having a second density; (1) the first density being greater than the second density.
[0010]
10. Filter cartridge (1, 301, 401) according to any one of claims 1 to 9, CHARACTERIZED in that: (a) the first end piece (8, 308, 408) defines a circular outer perimeter .
[0011]
11. Filter cartridge (1, 301, 401), according to any one of claims 1 to 10, CHARACTERIZED in that: (a) the first end piece (8, 308, 408) defines a central opening ( 10, 310, 410) circular.
[0012]
12. Filter assembly, CHARACTERIZED in that it comprises: (a) a housing; and (b) a filter cartridge as defined in any one of claims 1 to 11 operatively positioned within the housing.
[0013]
13. A method of forming a filter cartridge, as defined in claim 1, CHARACTERIZED in that it comprises: (a) in-situ molding an end piece, in a medium at a location that extends between the medium and an element of housing seal, the end piece having a central opening and comprising: (i) an end cap section secured to the middle at a first end of the middle; and, (ii) a radial sealing support section for the housing sealing member; (b) the step of molding including non-removably attaching the housing sealing member to the endpiece.

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法律状态:
2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2018-03-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2018-03-20| B06I| Publication of requirement cancelled [chapter 6.9 patent gazette]|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |

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2019-10-15| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-06-01| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|

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2021-10-26| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2022-01-11| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 18/11/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US201261728091P| true| 2012-11-19|2012-11-19|

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US61/728,091|2012-11-19|

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US13/833,002|2013-03-15|

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US13/833,002|US9089804B2|2012-11-19|2013-03-15|Filter arrangements; components; assemblies; and, methods|

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PCT/US2013/070585|WO2014078796A2|2012-11-19|2013-11-18|Filter arrangements; components; assemblies; and, methods|

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