• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    filter for a tire. a tire set includes a tire, a filter element arranged between the tire cavity and the atmosphere. the filtering element has threads for attachment to the tire. the first and second sides extend, respectively, from the first and second tire bead regions to a tire tread region. the first side has a curving region, curving operationally when radially within a rolling rolling impression. a side notch defines notch walls, positioned within the curved region of the first, tire side. the side notch deforms in response to the curving of the curving region of the first side, while radially within the impression of rolling rolling pattern. an air passage is defined by the side notch and deforms when radially within the impression of rolling rolling pattern.
    公开号:BR102013018903B1
    申请号:R102013018903-0
    申请日:2013-07-24
    公开日:2020-07-14
    发明作者:Andreas Frantzen
    申请人:The Goodyear Tire & Rubber Company；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The invention relates to the filtration of air for a pneumatic tire, and, more specifically, the filtration of air in a pumping set for a pneumatic tire. BACKGROUND OF THE INVENTION
    [002] Normal air diffusion reduces tire pressure over time. The normal state of tires is under inflated. Consequently, drivers must act, repeatedly, to maintain tire pressures, or fuel economy, tire life and vehicle braking and handling performance will be reduced. Tire pressure monitoring systems have been proposed to alert drivers when tire pressure is significantly low. These systems, however, remain dependent on the driver taking remedial action, when advised to refill a tire at the recommended pressure. It is desirable, therefore, to incorporate an air maintenance aspect inside a tire, which will maintain the air pressure inside the tire, to compensate for any reduction in tire pressure over time, without the need for driver intervention. SUMMARY OF THE INVENTION
    [003] In one form of the present invention, a pneumatic tire assembly comprises: a tire having a pneumatic cavity; a filter element disposed between the pneumatic cavity and the atmosphere, the filter element being made of a porous plastic, the filter element having threads to fix it in the pneumatic tire; a first and a second side extending, respectively, from the first and second bead regions to a tire tread region, the first side having at least one curving region, which curves operationally when radially within an impression. rolling tire tread design; and a side notch, defined by notch walls positioned within the curving region of the first tire side, the side notch deforming segment by segment, between a non-deformed and a deformed state, a constricted state in response to the curving of the curving region of the first side, while radially within the impression of rolling tire tread design. An air passage is defined by the side notch and deforms segment by segment, between an expanded condition and a condition that is at least partially compressed, in response to the respective segment by segment deformation of the side notch, when radially within the rolling tire tread design.
    [004] According to another aspect of the pneumatic tire set, the filter element is constructed of polyamide.
    [005] According to another aspect of the pneumatic tire set, the filter element also includes a connector with threads corresponding to the threads of the filter element.
    [006] According to yet another aspect of the pneumatic tire set, the connector is attached to the pneumatic tire, in a position separate from the threads.
    [007] According to yet another aspect of the pneumatic tire set, an underlayer is applied to a bare surface of the connector.
    [008] According to yet another aspect of the pneumatic tire set, a top layer is applied to the connector.
    [009] According to yet another aspect of the pneumatic tire set, a composite cement is applied to the connector.
    [010] According to yet another aspect of the pneumatic tire set, the sublayer is dried on the bare surface of the connector at 180 ° C for 8 min.
    [011] According to yet another aspect of the pneumatic tire set, the connector is dried in the connector sublayer at 180 ° C for 8 min.
    [012] According to yet another aspect of the pneumatic tire set, the composite cement is prepared from a homogeneous paste in a solvent on the top layer.
    [013] In another form of the present invention, a pneumatic tire assembly comprises: a tire having a pneumatic cavity; a filter element disposed between the pneumatic cavity and the atmosphere, the filter element being made of a porous plastic, the filter element having threads to fix it in the pneumatic tire; a first and a second side extending, respectively, from the first and second bead regions to a tire tread region, the first side having at least one curving region, which curves operationally when radially within an impression. rolling tire tread design; and a side notch, defined by notch walls positioned within the curving region of the first tire tread, the side notch deforming segment by segment, between an undeformed state and a constrained state, deformed in response to curving of the curving region of the first back, while radially within the impression of rolling tire tread design. An air passage is defined by the side notch and deforms segment by segment, between an expanded condition and a condition that is at least partially compressed, in response to the respective segment by segment deformation of the side notch, when radially within the design print. rolling tire rolling.
    [014] According to another aspect of the tire set, a separate chamber is arranged within the side notch, the separate chamber defining a circular airway, the filter element operating within the circular airway.
    [015] According to yet another aspect of the tire set, the filter element also includes a connector with threads corresponding to the threads of the filter element.
    [016] According to yet another aspect of the tire set, the connector is attached to the tire, in a position separate from the threads.
    [017] According to yet another aspect of the tire set, an underlayer is applied to a bare surface of the connector.
    [018] According to yet another aspect of the tire set, a top layer is applied to the connector.
    [019] According to yet another aspect of the tire set, a composite cement is applied to the connector.
    [020] According to yet another aspect of the tire set, the sublayer is dried on the bare surface of the connector at 180 ° C for 8 min.
    [021] According to another aspect of the tire set, the connector is dried in the connector sublayer at 180 ° C for 8 min.
    [022] According to yet another aspect of the tire set, the composite cement is prepared from a homogeneous paste in a solvent on the top layer. DEFINITIONS
    [023] "Aspect ratio" of the tire means the ratio of its section height (SH) to its section width (SW), multiplied by 100 percent for expression as a percentage.
    [024] "Asymmetric tread" means a tread that has an asymmetrical tread pattern around the tire's central plane or equatorial plane EP.
    [025] "Axial" and "axially" mean lines or directions that are parallel to the tire's axis of rotation.
    [026] "Anti-friction element" is a narrow strip of material, placed around the outside of a tire bead, to protect the lining of the cord from wear and cut against the rim and distribute the flex above the rim.
    [027] "Circumferential" means lines or directions extending along the perimeter of the annular tread surface, perpendicular to the axial direction.
    [028] "Equatorial central plane (CP)" means the plane perpendicular to the axis of rotation of the tire and which passes through the center of the tread.
    [029] "Tread pattern printing" means the contact patch or contact area of the tire tread with a flat surface at zero speed and under normal load and pressure.
    [030] "Notch" means an elongated empty area on a tire, dimensioned and configured in section to receive an air chamber in it.
    [031] "Built-in side" means the side of the tire closest to the vehicle, when the tire is mounted on a wheel, and the wheel is mounted on the vehicle.
    [032] "Lateral" means an axial direction.
    [033] "Side edges" means a line tangent to the tread contact patch or tread pattern printing more axially external, measured under normal load and normal inflation, the lines being parallel to the equatorial central plane.
    [034] "Final contact area" means the total area of tread elements in contact with the ground, between the lateral edges around the entire circumference of the tread, divided by the total area of the entire tread , between the side edges.
    [035] "Non-directional tread" means a tread, which has no preferred forward travel direction, and does not need to be positioned on a vehicle in one or more wheel positions, to ensure that the tread pattern of travel is aligned with the preferred direction of travel. In contrast, a directional tread model has a preferred travel direction, requiring specific wheel placement.
    [036] "Extruded side" means the side of the tire furthest from the vehicle, when the tire is mounted on a wheel, and the wheel is mounted on the vehicle.
    [037] "Peristaltic" means an operation by means of wave-shaped contractions, which impel the contained matter, such as air, along tubular paths.
    [038] "Radial" and "radially" mean directions radially towards or away from the axis of rotation of the tire.
    [039] "Streak" means a rubber strip extending circumferentially in the tread, which is defined by at least one circumferential notch, and a second of that notch or a lateral edge, the strip being laterally undivided by notches of full depth.
    [040] "Cut" means small grooves molded into the tire tread elements, which subdivide the tread surface and improve traction, the cuts are generally narrow in width and close to the tire tread pattern impression, opposite to the notches that remain open when printing a tire tread pattern.
    [041] "Tread element" or "traction element" means a lane or a block element, defined by a shape with adjacent notches.
    [042] "Tread bar arc width" means the length of the tread arc, measured between the lateral edges of the tread. BRIEF DESCRIPTION OF THE DRAWINGS
    [043] The invention will be described by way of example and with reference to the accompanying drawings, in which: Figure 1 is a schematic view of an exemplary filter, according to the present invention; Figure 2 is a side view of an exemplary tire / tube assembly; Figures 3A - 3C show the details of an exemplary output connector; Figures 4A - 4E show the details of the example input connector (filter); Figure 5A is a side view of an exemplary tire rotating with the movement of the air (84) into the cavity; Figure 5B is a side view of the exemplary tire rotating with air pouring out of the filter; Figure 6A is a sectional view taken from Figure 5A; Figure 6B shows an enlarged detail of the chamber area taken from Figure 6A, the side in an uncompressed state; Figure 7A is a sectional view taken from Figure 5A; Figure 7B shows an enlarged detail of the chamber area taken from Figure 7A, the side in a compressed state; Figure 8A shows an enlarged detail of an exemplary camera & notch detail taken from Figure 2; Figure 8B shows a detail of an exemplary chamber compressed and being inserted into the notch; Figure 8C shows a detail of an exemplary chamber fully inserted in the notch, in a notched area of the notch; Figure 8D is a detailed fragmentary view of the chamber being inserted into a scored notch; Figure 9 shows an enlarged detail taken from Figure 2, showing an exemplary lane profile area, located on both sides of the outlet to a cavity connector; Figure 10A shows an enlarged detail of the notch with the exemplary streak profile; Figure 10B shows an enlarged detail of the compressed chamber in the exemplary streak profile; Figure 11 shows an enlarged detail taken from Figure 2, showing another exemplary lane profile area, located on both sides of the outlet for a cavity connector; Figure 12A shows an enlarged detail of the notch with the other exemplary streak profile; Figure 12B shows an enlarged detail of the notch compressed in the other exemplary lane profile; Figure 13A shows an enlarged view of another detail of the exemplary chamber &notch; Figure 13B shows a detail of the chamber of Figure 13A being compressed and inserted into the notch; Figure 13C shows a detail of the chamber of Figure 13A fully inserted in the notch; Figure 14A shows an enlarged view of a third exemplary camera & notch detail; Figure 14B shows a detail of the chamber of Figure 14A being compressed and inserted into the notch; Figure 14C shows a detail of the chamber of Figure 13A fully inserted in the notch; Figure 15A shows an enlarged view of a fourth exemplary camera & notch detail; Figure 15B shows a detail of the chamber of Figure 14A being compressed and inserted into the notch; Figure 15C shows a detail of the chamber of Figure 13A fully inserted in the notch; and Figure 16 shows a detailed isometric view of an exemplary tire and tire assembly. DETAILED DESCRIPTION OF THE EXAMPLES OF THE PRESENT INVENTION
    [044] With reference to Figures 16, 2 and 6A, an exemplary tire set 10 can include a tire 12, a peristaltic pump set 14 and a tire rim 16. The tire can be mounted in a conventional manner in a pair of rim mounting surfaces 18, 20, adjacent to adjacent outer rim flanges 18, 20. The rim flanges 22, 24 both have a flange end facing radially outward 26. A rim body 28 can support the rim assembly tire 10 as shown. Tire 12 can be of a conventional construction, having a pair of sides 30, 32 extending from opposite bead areas 34, 36 to a rope or tire tread region 38. Tire 12 and rim 16 can close a pneumatic cavity 40.
    [045] As seen in Figures 2 and 3A, 3B, 3C, 6B and 8A, the exemplary peristaltic pump assembly 14 may include an annular air chamber 42, which encloses an air passage 43. Chamber 42 may be formed from a resilient flexible material, such as plastic or rubber compounds, that are able to withstand repeated strain cycles from a flattened condition subjected to an external force, and, upon removal of that force, returned to an original condition generally of circular cross section. The chamber 42 can be of sufficient diameter to operationally pass a volume of air, for the purposes described in this specification, and allow a positioning of the chamber in an operable location within the tire assembly 10, as will be described below. In the exemplary configuration shown, the chamber 42 can be a cross section of generally elliptical shape, elongated, having opposite chamber sides 44, 46 extending from a flat (closed) rear camera end 48 to a streaked front camera end ( 50) The chamber 42 may have a pair projecting outward from locking streaks 52 of a generally semicircular cross section, and each streak extending along the outer surfaces of the sides 44, 46, respectively.
    [046] As noted in Figure 8A, chamber 42 can have a length L1 within a range of 3.65 mm to 3.80 mm, a width of D1 within a range of 2.2 mm to 3.8 mm , a rear end width of D3 within a range of 0.8 mm to 1.0 mm. The protruding detent streaks 52, 54 can both have a radius of curvature R2 within a range of 0.2 mm to 0.5 mm, and each streak can be located at a position distance L3 within a range of 1.8 mm to 2.00 mm from the end of the rear chamber 48. The front end 50 of the chamber 42 may have a radius R1 within a range of 1.1 mm to 1.9 mm. The air passage 43 inside the chamber 42 can also be generally elliptical, with a length L2 within a range of 2.2 mm to 2.3 mm and a width D2 within a range of 0.5 mm to 0.9 mm.
    [047] Chamber 42 can be profiled and geometrically configured for insertion into a notch 56. Notch 56 may have a generally elliptical, elongated configuration, with an L1 length within a range of 3.65 mm to 3.80 mm, complementary to the elliptical shape of the chamber 42. The notch 56 may include a narrower narrow entry path 58, having a width in the nominal cross section D3 within a range of 0.8 mm to 1.0 mm. A pair of grooved and axial receiver channels 60, 62 of semicircular configuration can be formed within the opposite sides of the groove 56, for corresponding reception of the camera locking streaks 52, 54, respectively. The channels 60, 62 can be spaced approximately a distance L3, within a range of 1.8 mm to 2.0 mm from the slot entry path 58. The holding channels 60, 62 can both have a radius of curvature R2 within a range of 0.2 mm to 0.5 mm. An internal retaining notch part 64 can be formed with a radius of curvature R1 within a range of 1.1 mm to 1.9 mm and a nominal width in cross section D1 within a range of 2.2 mm to 3, 8 mm.
    [048] As best seen from Figures 8D, 9, 10A and 10B, tire 12 can still form one or more compression streaks 66, extending around the circumference of, and projecting to, notch 56. Streaks 66 can form a model of streaks of pitch, frequency and pre-established location, as described below. For explanatory purposes, seven compression streaks can generally be referred to by the number 66, in the first model of streak profile shown, and specifically by the designations DO to D6. Rays DO to D6 can be formed in a sequence and step model, to optimize air pumping through the passage of chamber 43. Rays 66 can have all unique and predetermined height and placement within the model, and, as shown in Figure 8D, protrude out into the slot 56 at a radius R3 (Figure 8A) within a range of 0.95 mm to 1.60 mm.
    [049] With reference to Figures 16, 2, 3A to 3C, and 4A to E, the peristaltic pump assembly 14 may further include an input device 68 and an output device 70, spaced between silicon at approximately 180 degrees, in respective locations along the circumferential air chamber 42. The exemplary outlet device 70 has a T-shaped configuration, in which conduits 72, 74 direct air to and from the pneumatic cavity 40. An outlet device housing 76 contains duct arms 78, 80, which extend integrally from respective ducts 72, 74. Each duct arms 78, 80 have external coupling streaks 82, 84, to retain the ducts within disconnected ends of the chamber 42, in assembled condition. The housing 76 is formed having an external geometry, which complements the notch 56 and includes a flat end 86, a generally oblong body, striped 88, and longitudinal detent rays extending outward 90. The housing 76 can be way, able to close the receipt in the slot 56, in its undesired location, with the streaks 90 registering inside the slot 56, as shown in Figure 8A.
    [050] Input device 68, as seen in Figures 12, 4A to 4E, can include an elongated outer glove body 95 joining an elongated inner glove body 96, in a narrow glove neck 98. The outer glove body it is usually of triangular section. The inner glove body 96 has an oblong outer geometry, complementary to the groove 56, and includes a pair of retaining streaks 100, extending longitudinally along the inner glove body. An elongated air inlet chamber 101 is positioned within the inner sleeve body 96 and includes opposite chamber ends 102 and an inlet opening model 104, extending into a central chamber passage. The outer streaks 106, 108 secure the chamber ends 102 in the air chamber 42, opposite the outlet device 70.
    [051] As shown in Figures 6A, 6B, 7A, 7B, 8A to D, the pump assembly 14 can comprise the air chamber 42 and the inlet and outlet devices 68, 70 affixed in line in the air chamber, in the respective locations 180 degrees apart from each other when inserted in the groove 56. The groove 56 can be located in a region of the lower side of the tire 12, which, when the tire is mounted on the rim 16, positions the air chamber 42 above the ends rim flange 26. Figure 8B shows air chamber 42 squeezed and compressed diametrically to accommodate insertion in slot 56. Upon complete insertion, as shown in Figure 8C, streaks 52, 54 can register within the channels of notch 60, 62, and the flat outer end 48 of chamber 42 can generally be coplanar with the outer end of the tire tread. Once fully inserted, the air passage 43 of the chamber 42 can itself be elastically restored to an open condition, to allow airflow through the chamber, during operation of the pump.
    [052] With reference to Figures 16, 2, 5A, 6A, 6B, 7A, 7B, 8A to 8D, the input device 68 and the output device 70 can be positioned within the circumference of the circular air chamber 42, generally 180 degrees apart. The tire 12 with the chamber 42, positioned inside the notch 56, rotates in a direction of rotation 110, causing an impression of the rolling pattern 120, which is formed against the surface of the ground 118. A compressive force 124 is directed to the tire 12 of the running pattern print 120 and acts to flatten a segment of the tube passage 43, as opposed to the running pattern print 120, as shown with the number 122. Flattening a segment of the runway 43 forces the air in the segment along the passage of the chamber 43, in the direction shown by the arrow 116, towards the outlet device 70.
    [053] As the tire 12 continues to rotate in the direction 110, along the surface of the ground 118, the chamber 42 can be sequentially flattened or squeezed as opposed to the tire's tread pattern printing, segment by segment, in a direction opposite to direction 110. Sequential flattening of chamber passage 43, segment by segment, can cause air, evacuated from the flattened segments, to be pumped in direction 116 into chamber passage 43, towards outlet device 70 Air can flow through the outlet device 70 and into the pneumatic cavity 40, as shown in 130. At 130, the air leaving the outlet device 70 can be directed to the pneumatic cavity 40 and serve to re-inflate the tire 12 to a desired pressure level. A valve system, for regulating the air flow to cavity 40, when the air pressure within the cavity drops to a pre-established level, is shown and described in the pending U.S. Patent Application Serial No. 12 / 775,552, filed on May 7, 2010, and incorporated in this specification by reference.
    [054] With the tire 12 turning in the direction 110, the flattened chamber segments can be sequentially refilled by air flowing to the input device 68, in the direction 114, as shown in Figure 5A. The inflow of air into the input device 68, and then into the passage of chamber 43, can continue until the output device 70, rotating in a counterclockwise direction 110, passes the impression of tire tread 120. A Figure 5B shows the orientation of the peristaltic pump assembly 14 in that position. The chamber 42 can continue to be sequentially flattened, segment by segment, as opposed to the impression of tire tread 120 by a compressive force 124. Air can be pumped clockwise 116 to the input device 68 and evacuated or exhausted external to the tire 12. The discharge air passage, as shown in 128, from the input device 68, can occur through a filter sleeve 92, formed exemplarily of a cellular or porous material or composite. The air flow through the filter sleeve 92 and into the chamber 101 can thus clean up debris or particulate matter. In the discharge flow or reverse air direction 128, the filter sleeve 92 can be cleaned of accumulated debris or particles trapped within the porous medium. With the evacuation of the pumped air out of the input device 68, the output device 70 can be in a closed position, preventing the flow of air to the pneumatic cavity 40. When the tire 12 rotates further in the counterclockwise direction 110 , until the inlet device 70 passes the tire tread pattern printing 120 (as shown in Figure 5A), the air flow can be restored to the outlet device and cause the pumped air to flow out and into the pneumatic cavity 40. The air pressure within pneumatic cavity 40 can thus be maintained at a desired level.
    [055] Figure 5B illustrates that the chamber 12 is flattened, segment by segment, as the tire 12 rotates in the direction 110. A flattened segment 134 moves counterclockwise as it is rotated away of the tire tread pattern print 120, while an adjacent segment 132 moves opposite the tire tread pattern print and is flattened. Consequently, the progression of squeezed or flattened or closed air chamber segments can move air in the direction of outlet device 70 (Figure 5A) or inlet device 68 (Figure 5B), depending on the rotational position of tire 12 relative to those devices. As each segment is moved by rotating the tire away from the tread pattern printing 120, the compressive forces within the tire 12, from the tread pattern printing, can be eliminated, and the segment can be reconfigured resiliently in an uninflated or open condition, as the segment is refilled with air from passage 43. Figures 7A and 7B show a segment of chamber 42 in the flattened condition, while Figures 6A and 6B show the segment in an expanded, deflated, or open configuration, before and after moving away from a location opposite the tire tread pattern 120. In the original deflated configuration, the chamber segments 42 can restore the exemplary generally elliptical elliptical shape.
    [056] The cycle described above can be repeated for each revolution of the tire, with half of each rotation resulting in pumped air moving into the pneumatic cavity 40 and half each rotation resulting in pumped air moving back into the tire sleeve. filter 92 of input device 68, for self-cleaning of the filter. It can be considered that, even though the rotation direction 110 of the tire 12 is as shown in Figures 5A and 5B, in the counterclockwise direction, the present tire set 10 and its peristaltic pump set 14 can also work in a similar way in a reverse (clockwise) direction of rotation. The peristaltic pump assembly 14 can therefore be bidirectional and equally functional, with the tire 12 and the vehicle moving in a forward or reverse direction of rotation and the forward or reverse direction of the vehicle.
    [057] The air chamber / pump assembly 14 can be as shown in Figures 5A, 5B, 6A, 6B, 7A and 7B. The chamber 42 can be located inside the notch 56, in a lower region of the side 30 of the tire 12. The passage 43 of the chamber 42 can be closed by curving deformation by compression of the notch of the side 56, within the impression of the tread pattern. in bearing 120, as explained above. The location of the chamber 42 on the side 30 can provide freedom of placement, thereby avoiding the contact between the chamber 42 and the rim 16. The higher placement of the chamber 42 in the groove of the side 56 can use high deformation characteristics of that region from the side, as it passes through the tread pattern of the tire 120, to close the chamber 42.
    [058] The configuration and operation of the notched sides and, in particular, the compression of the variable pressure pump of chamber 42, by operating recesses or compression streaks 66, inside the notch 56, are shown in Figures 8A - 8D, 9 , 10A and 10B. The indentations or lanes are indicated by the number 66 and, individually, as DO to D6. The notch 56 can be circumferentially uniform in width along the side of the tire 12, with the molded recesses DO to D6 formed, for projection into the notch 56 in a pre-selected sequence, model or arrangement. Rays DO through D6 can retain chamber 42 in a predetermined orientation within slot 56, and may also apply a variable sequential constriction force to the chamber.
    [059] The pump chamber uniformly sized 42 can be positioned inside slot 56, as explained above - a procedure initiated by mechanically spreading the D3 inlet path of slot 56 separately. The chamber 42 can then be inserted into the enlarged opening of the notch 56. The opening of the notch 56 can then be released to return to close at the original spacing D3, and thereby capture the chamber 42 within the notch. The longitudinal locking streaks 52, 54 can thus be captured / locked in the longitudinal notches 60, 62. The locking streaks 52, 54 therefore operate to lock the chamber 42 into the notch 56 and prevent the ejection of the chamber from the notch. 56, during operation / rotation.
    [060] Alternatively, the chamber 42 can be inserted by pressing into the groove 56. The chamber 42, being of uniform dimensions and wide geometry, can be manufactured in large quantities. In addition, a uniformly sized pump chamber 42 can reduce the overall assembly time, material cost and unevenness of chamber inventory. From a reliability perspective, this results in less chance of scrap.
    [061] The circumferential recesses DO to D6, projecting into the notch 56, can increase in frequency (number of recesses per unit of axial notch length) in the direction of the entrance passage of the chamber 42, represented by the exit device 70. Each of the recesses DO to D6 can have a common radius dimension R4 within a range of 0.15 mm to 0.30 mm. The spacing between the Do and D1 recesses can be larger, the spacing between D1 and D2 the next largest, and so on, until the spacing between the D5 and D6 recesses is normally eliminated. Although seven indentations are shown, more or less indentations can be arranged at various frequencies along the notch 56.
    [062] The projection of the recesses in the notch 56 by radius R4 can serve a dual purpose. First, the recesses DO to D6 can be coupled to the chamber 42 and prevent the migration of the chamber, or "walking" of it, along the notch 56, during operation / rotation of the tire, from the desired location of the chamber. Second, the recesses DO to D6 can compress the chamber segment 42, opposite each recess, to a greater degree, as the tire 12 rotates through its rotating pumping cycle, as explained above. The flexion of the side can manifest a compressive force through each of the recesses DO to D6, and can constrict the chamber segment, opposite to this recess, to a greater degree than would otherwise occur in the non-curled parts opposite the segments of the slot chamber 56. As seen in Figures 10A and 10B, as the frequency of the recesses increases in the direction of the air flow, tightening of the passage of chamber 43 can occur progressively, until the passage is constricted to the size shown in number 136, gradually reducing the volume of air and increasing the pressure. Therefore, with the presence of the recesses, the notch 56 can provide a variable pumping pressure within the chamber 42, configured so that it has a uniform dimension along it. As such, the side notch 56 may be a variable pressure pump notch, working to apply variable pressure to a chamber 42, located within the notch. It must be considered that the degree of variation of pumping pressure can be determined by the pitch or frequency of recesses within the notch 56 and by the amplitude of the recesses arranged relative to the diametal dimensions of the passage of the chamber 43. The greater the amplitude of the recesses, relative to the diameter, a larger volume of air can be reduced in the chamber segment, opposite the recess, and the pressure increased, and vice versa. Figure 9 illustrates the attachment of chamber 42 to the outlet device 70 and the direction of the air flow on both sides to the outlet device.
    [063] Figure 11 shows a second alternative of a lane profile area, located on both sides of the outlet for the output device 70. Figure 12A shows an enlarged detail of the notch 56, with the second alternative lane, and Figure 12B shows an enlarged detail of chamber 42 compressed in the second lane profile. With reference to Figures 11, 12A, 12B, the recesses or streaks DO to D6 have, in this alternative mode, a frequency model similar to that described above with reference to Figures 10A, 10B, but with each streak also having a respective unique amplitude . Each lane DO to D6 can generally have a semicircular cross section, with a respective radius of curvature R1 to R7, respectively. The radii of curvature of the recesses DO to D6 can be within the exemplary range: A = 0.020 mm to 0.036 mm.
    [064] The various recesses Do to D6 and the respective radii of each recess can be built outside the ranges mentioned above, to suit other dimensions or applications. The radius of increasing curvature, in the direction of the air flow, can result in the recesses DO to D6 projecting to an increasing amplitude, and to an increasing extent, for the passage 43, towards the outlet device 70. As such , the passage 43 can be constricted to a narrower region 138 in the direction of the outlet device 70 and cause a correspondingly greater increase in air pressure, from a reduction in air volume. The benefit of this configuration is that the chamber 42 can be constructed less than would otherwise be necessary, to obtain a desired air flow pressure along the passage 43 and into the pneumatic cavity 40, from the outlet device 70. A smaller size chamber 42 may be desirable from an economic and functional point of view, in order to allow a smaller notch 56 within the tire 12 to be used, thereby resulting in minimal structural discontinuity in the tire sidewall.
    [065] Figures 13A to 13C show another detail of the chamber 42 and the notch 56, in which the retaining streaks 90 of Figures 8A to 8C are eliminated as a result of the changes of the streak and the notch. This chamber 42 can have an external configuration of passage and geometry, with dimensions within the ranges indicated below: D1 = 2.2 to 3.8 mm; D2 = 0.5 to 0.9 mm; D3 = 0.8 to 1.0 mm; R4 = 0.15 to 0.30 mm; L1 = 3.65 to 3.8 mm; L2 = 2.2 to 2.3 mm; and L3 = 1.8 to 2.0 mm.
    [066] The ranges mentioned above can be modified to suit the dimensional preference, the geometry of the tire or the application of the particular tire. The external configuration of the chamber 42 can include: the chamfered surfaces 138, 140 adjacent the end surface 48; the parallel and opposite straight intermediate surfaces 142, 144 adjacent to the chamfered surfaces, respectively; and a striped nose, or a front surface 146, adjacent to the intermediate surfaces 142, 144. As seen from Figures 13B and 13C, the chamber 42 can be compressed for insertion by pressing into the groove 56, and, after complete insertion, expand if. The constricted opening of the groove 56, on the surface of the side, can firmly retain the chamber 42 within the groove 56.
    [067] Figures 14A to 14C show another configuration of chamber 42 and notch 56. Figure 14A is an enlarged view, and Figure 14B is a detailed view showing chamber 42 compressed and inserted into notch 56. Figure 14C is a detailed view showing the chamber 42 fully inserted in the slot 56. The chamber 42 can generally be of an elliptical cross section, inserting itself in a slot of similar configuration 56. The slot 56 can have a narrow entry path, formed between the opposite parallel surfaces 148, 150. In Figures 14A to 14C, chamber 42 is configured having an external geometry and passage configuration with dimensions within the specified ranges shown below: D1 = 2.2 to 3.8 mm; D2 = 0.5 to 0.9 mm; D3 = 0.8 to 1.0 mm; R4 = 0.15 to 0.30 mm; L1 = 3.65 to 3.8 mm; L2 = 2.2 to 2.3 mm; and L3 = 1.8 to 2.0 mm.
    [068] The ranges mentioned above can be modified to suit the dimensional preference, the geometry of the tire or the application of the particular tire. Figures 15A to 15C show another configuration of chamber 42 and notch 56. Figure 15A is an enlarged view, and Figure 15B is a detailed view showing chamber 42 compressed and inserted into notch 56. Figure 15C is a detailed view showing the chamber 42 fully inserted in the groove 56. The chamber 42 can generally have a parabolic cross section, for insertion into a groove of similar configuration 56. The groove 56 can have an entry path dimensioned to closely accept the chamber 42 therein. The recesses 66 can be coupled to the chamber 42, once inserted in the groove 56. In Figures 15A to 15C, the chamber 42 has an external geometry and passage configuration with dimensions within the ranges specified below: D1 = 2.2 to 3 , 8 mm; D2 = 0.5 to 0.9 mm; D3 = 0.8 to 1.0 mm; R4 = 0.15 to 0.30 mm; L1 = 3.65 to 3.8 mm; L2 = 2.2 to 2.3 mm; and L3 = 1.8 to 2.0 mm.
    [069] The ranges mentioned above can be modified to suit the dimensional preference, the geometry of the tire or the application of the particular tire.
    [070] From what has been presented above, it should be considered that the present invention may comprise a bidirectional peristaltic pump assembly 14, for air maintenance of a tire 12. The circular air chamber 42 can flatten, segment by segment, and closing in the tread pattern print of the tire 100. The air inlet device 68 may include an external filter sleeve 92, formed of porous cellular material, and thereby make the air inlet device 68 self-cleaning. The outlet device 70 may employ a valve unit (see U.S. Copending Patent Application Serial No. 12 / 775,552, filed May 7, 2010, incorporated by reference in this specification). The peristaltic pump assembly 14 can pump air by rotating the tire 12 in any direction, half a revolution by pumping air into the pneumatic cavity 40 and the other half of a revolution by pumping air back into the input device 68. The set of peristaltic pump 14 can be used with a secondary tire pressure monitoring system (TPMS) (not shown), which can serve as a fault detector in the system. TPMS can be used to detect any failure in the self-inflating system of tire set 10, and alert the user of this condition.
    [071] The tire air maintenance system 10 may further incorporate a variable pressure pump notch 56, with one or more recesses or streaks directed inward 66 coupling to, and compressing, a segment of the air chamber 42 opposite to that one or more lanes. The pass or frequency of the lanes can increase towards the outlet device 70, to gradually reduce the volume of air inside the passage 43 by compression of the chamber 42. The reduction in the volume of air can increase the air pressure inside the passage 43, and thereby facilitate a more efficient air flow from the chamber 42 to the pneumatic cavity 40. The increase in the chamber pressure can be obtained by coupling by the lanes 66 of the notch 56 and the chamber 42, having uniform dimensions along its length. The chamber 42 can therefore be made in a uniform size and in a relatively smaller size, without compromising the air flow pressure to the pneumatic cavity 40, for maintaining the air pressure. The pitch and amplitude of the lanes 66 can both be varied to better achieve the desired pressure increase within the passage 43.
    [072] The structures in a pneumatic tire may require the insertion of certain rigid parts, functional devices and / or adherent connectors in the tire rubber. For example, structures 14, 42, 68, 70, 101, 202, etc. of the air maintenance tire 10, described above, may require embedding / adhesion. These structures 14, 42, 68, 70, 101, 202, etc. typically encounter high stresses during the operating conditions of the tire 10. Thus, a strong connection of these structures 14, 42, 68, 70, 101, 202, etc. is desirable, since a break in the surfaces of structures 14, 42, 68, 70, 101, 202, etc. it will probably result in the destruction of the assembly 14 and / or the integrity of the tire 10 as a whole.
    [073] For example, a polyamide 70 elbow-like structure can be attached to a tire 10, to define a cavity similar to a built-in chamber (Figure 3C). This structure 70 can thus allow redirection of pressurized air to a pump assembly 14 and from it to a pneumatic cavity 40, as well as making a connection to the outside, to provide fresh depressurized air to the pump assembly.
    [074] The establishment of the self-inflating tire technology (STI / AMT), described above, may require a filter 200, according to the present invention, as part of that pneumatic tire 12, to filter air, before it enters the pneumatic cavity 40. Filter 200 may require sufficiently high air permeation, as well as acceptable cost, chemical and mechanical durability, ability to retain water and / or complexity. The filter 200 can therefore be constructed of a porous plastic.
    [075] Conventionally, porous plastics (eg polypropylene, polyethylene, teflon, etc.) are offered as an air filter material for various applications. These porous plastics combine flexibility in shape, chemical durability, ability to retain water, low complexity and low manufacturing cost, to demonstrate a new and extremely useful filter material for SIT / AMT tires, such as the pneumatic tire 12. The permeation properties of air, chemical durability and water separation potential can be reduced to a mere material property, relative to the distribution of pore sizes and the type of polymer. As an example, the screws can be manufactured from porous plastics, so there is no need to embed the material in a metal or plastic frame material (for example, threads mechanically attach filter 200 to the pneumatic tire 12). This can reduce complexity to the lowest possible level, and, consequently, minimize the manufacturing cost of the 200 filter and / or the filter set.
    [076] As shown in Figure 1, a grub screw 200 of a porous plastic material can be threaded into a connector 202, which is embedded in the side 30, 32 of a pneumatic self-inflating tire 12, thereby filtering a flow of air between the atmosphere, through filter 200, to pneumatic cavity 40. This filter 200 can also form a part of a pneumatic tire 12, rotating and under load. Furthermore, this filter 200 comprises an improvement over conventional woven metal filters in which corrosion is eliminated, the ability to retain water is increased, and the cost and complexity are reduced.
    [077] Variation in the present invention is possible in light of its description provided in this specification. Although certain examples and representative details have been shown, in order to illustrate the present invention, it will be apparent to those skilled in the art that various variations and modifications can be made to it, without departing from the scope of the present invention. It is, therefore, to be understood that variations can be made in the particular examples described, which will fall within the desired scope of the present invention, as defined by the appended claims presented below.
    权利要求:
    Claims (10)
    [0001]
    1. Pneumatic tire assembly comprising: a cavity (40), a first and a second side (30, 32) extending respectively from a first and a second tire bead region (34, 36) to a region of tire tread (38), the first side having at least one curving region operationally curving when radially within a rolling tire tread design (120); a side notch (56) defined by notch walls positioned within the curving region of the first tire side (30), the side notch (56) operationally deforming segment by segment between an undeformed state and a constrained state , deformed, in response to a curving of the curving region of the first side (30) while radially within the impression of rolling tire tread pattern (120); an air passage (43) defined by the side groove or located within the side groove (56) and operationally deforming segment by segment between an expanded condition and a condition at least partially compressed in response to the respective segment by segment deformation. side notch (56) when radially within the impression of rolling tire tread pattern (120); and a filter element (200) disposed between the cavity (40) and atmosphere, the filter element (200) being constructed of a porous plastic, and the filter element (200) comprising fixing means for securing the filter element (200) to the pneumatic tire (12), CHARACTERIZED by the fact that the fixing means are or comprise threads or in that the tire (12) comprises a connector (202) with fixing means or threads corresponding to the fixing means or threads of the filter element ( 200) to attach the filter element (200) to the tire (12).
    [0002]
    2. Pneumatic tire set according to claim 1, CHARACTERIZED by the fact that the filter element (200) is constructed of polyamide or comprises polyamide.
    [0003]
    3. Pneumatic tire assembly according to any one of the preceding claims, CHARACTERIZED by the fact that it further comprises a separate chamber (42) within the side groove (56), the separate chamber (42) defining a preferred air passage circular, and the filter element (200) operating within the circular air passage.
    [0004]
    4. Pneumatic tire set according to any one of the preceding claims, CHARACTERIZED by the fact that the separate chamber (42) has an external profile corresponding to an internal profile of the side notch (56).
    [0005]
    5. Pneumatic tire set, according to any of the previous claims, CHARACTERIZED by the fact that the filter element (200) operates within the air passage (43).
    [0006]
    6. Pneumatic tire assembly according to claim 1, CHARACTERIZED by the fact that the connector (202) is attached to the tire (12) in a position separate from the threads or fastening means.
    [0007]
    7. Pneumatic tire set, according to any one of the preceding claims, CHARACTERIZED by the fact that it also includes a sublayer applied to a connector surface (202).
    [0008]
    8. Pneumatic tire set according to claim 7, CHARACTERIZED by the fact that it also includes a top layer applied to the connector (202).
    [0009]
    9. Pneumatic tire set, according to claim 7 or 8, CHARACTERIZED by the fact that a composite cement is applied to the connector (202).
    [0010]
    10. Pneumatic tire set, according to any of the previous claims, CHARACTERIZED by the fact that the tire is a self-inflating tire
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    法律状态:
    2015-08-18| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-07-14| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 24/07/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/561.141|2012-07-30|
    US13/561,141|US8944126B2|2012-07-30|2012-07-30|Filter for a pneumatic tire|
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