• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A dispensing pump (700) includes a polymer compression spring assembly (706). The dispensing pump (700) includes a pump base (702), and a dispensing head having a piston rod. The polymer compression spring assembly (706) includes a split tubular spring element (722) and first and second loading cones (724,726) received at opposite ends of the split tubular spring element (722). The first loading cone (724) is fixed in relation to the pump base (702) while the second loading cone (726) is axially movable with the piston rod (716) and the dispensing head (704). The tubular spring element (722) is arranged coaxially around the piston rod (716) between the cones (724,726). When the dispensing head (704) is compressed, the loading cones (724,726) compress axially towards each other by means of which the split tubular spring element (722) expands radially to create an opposite contraction force, and , in turn, an axial extension force. When released, the spring element (722) contracts elastically to its resting shape, returning the loading cones (724,726) and the dispensing head (704) to their resting positions.
    公开号:BR112020013408A2
    申请号:R112020013408-2
    申请日:2018-12-28
    公开日:2020-12-01
    发明作者:Eelco H. DeMan；Paulus Zuijderduijn
    申请人:Silgan Dispensing Systems Corporation；
    IPC主号:
    专利说明:

    [001] [001] (1) Field of the Invention: the present invention relates in general to dispensing pumps for liquids, viscous fluid materials, foams, gels, etc. and, more particularly, to a dispensing pump with a polymer compression spring assembly.
    [002] [002] (2) Description of Related Art: Dispensing pumps for various liquids, lotions, foams, gels, etc. are known in the art. They generally comprise a body portion that is supported on the neck of a container, a coatting nozzle portion that slides in relation to the body portion, and a spring structure that requests the coattening mouthpiece portion to its normal resting position. To dispense the material in the container, the user manually presses the nozzle which forces the material from inside the body portion out through the nozzle. When the nozzle is released, the spring forces the nozzle portion back to its normal resting position. Most components of the pump system are typically formed of polymer materials, with the exception of the spring, which is typically formed of metal. The plastic pump components are easily recyclable. However, it was observed that the presence of the metal spring in the pump assemblies prevents or delays the recycling process because of the need to separate the metal spring from the other plastic components. Thus, there is a need in the industry for dispensing pump systems including plastic spring assemblies. SUMMARY OF THE INVENTION
    [003] [003] Exemplary modalities of a dispensing pump for liquids, viscous materials, foams, gels, etc. include a polymer compression spring assembly that allows the pump to be more easily recycled. The dispensing pump includes a pump base, and a dispensing head having an associated piston rod. The polymer compression spring assembly includes a split tubular spring element formed from a strength polymer material and first and second loading cones received at the first and second opposite ends of the split tubular spring element. The piston rod extends coaxially through the first loading cone, which is fixed to or on the pump base, and the second loading cone, which is axially movable with the piston rod and dispensing head. The tubular spring element is arranged coaxially around the piston rod between the first and second loading cones. When the dispensing head is compressed, the loading cones are compressible axially towards each other within the split tubular spring element whereby the split tubular spring element expands radially under tension to create an opposite radial contraction force , and, in turn, a spring force of axial extension. When released, the spring element elastically returns to its normal resting shape, returning the loading cones and dispensing head to their normal resting positions.
    [004] [004] An exemplary embodiment of a compression spring assembly according to the present invention includes a slotted tubular spring element formed from a resistant polymer material, and first and second loading cones received at the first and second opposite ends of the split tubular spring element. In some embodiments, both the spring element and the loading cones can be formed from polymer materials, making the spring assembly more easily recyclable.
    [005] [005] In the exemplary embodiment, the split tubular spring element is cylindrical in shape and has a uniform wall thickness. Loading cones are generally conical in shape and preferably have at least one wall section with a wall angle of no less than
    [006] [006] The loading cones are axially compressible towards each other within the open ends of the split tubular spring element, whereby the split tubular spring element expands radially under tension to create an opposite radial contraction force. Deformation of the tubular spring walls elastically stores energy that will return the spring to its normal resting shape when released. When released, the spring element elastically contracts, in turn creating an axial extension force, and returns the cones to their normal resting positions.
    [007] [007] Some embodiments of the spring assembly include a modified spring element having stress reducing ribs that extend along the opposite edges of the longitudinal slit. The ribs can include convex outward surfaces that extend both radially outward and circumferentially out of the slit edges. This embodiment additionally includes a first smaller wall thickness at the slit edges and a second smaller wall thickness diametrically opposite the slit edges. The arched surface along with the increasing wall thickness away from the slit edges distributes the tension more evenly across the spring element and extends the life cycle of the spring element.
    [008] [008] Other modalities of the spring set include a spring element that is hyperboloid in shape
    [009] [009] In some exemplary embodiments, all components of both the dispensing pump and the compression spring assembly are molded from the same plastic material that make the entire dispensing pump easily recyclable in a single classification of plastic material. Exemplary plastic materials include polypropylene (PP), high density polyethylene (HDPE), and low density polyethylene (LDPE). However, the description should not be considered limited to these materials. BRIEF DESCRIPTION OF THE DRAWINGS
    [0010] [0010] Although the specification concludes with claims particularly stressing and distinctly claiming particular embodiments of the invention in question, various embodiments of the invention can be more easily understood and understood from the following descriptions of various embodiments of the invention when read in combination with the accompanying drawings wherein: Fig. 1 is a plan view of an exemplary compression spring assembly according to the present invention; Fig. 2 is a perspective view of the tubular spring element cracked in a resting condition; Fig. 3 is a perspective view of the slotted tubular spring element in a radially expanded condition; Fig. 4 is a top view of the spring element; Fig. 5 is a front view of it; Fig. 6 is a side view of it; Fig. 7 is a cross-sectional view taken along line 7-7 of Fig. 4; Fig. 8 is an enlarged plan view of the loading cone; Figs. 9-12 are sequential views of the compression spring assembly being axially loaded and released;
    [0011] [0011] Referring now to the drawings, an exemplary embodiment of the present compression spring set is generally indicated by 10 in Fig. 1-12. According to the present invention, the compression spring assembly 10 comprises a slotted tubular spring element 12 formed of a resistant polymer material, and first and second loading cones 14, 16 received at the first and second opposite ends of the element slotted tubular spring 12. In some embodiments,
    [0012] [0012] In the exemplary embodiment, the split tubular spring element 12 is cylindrical in shape and has a uniform wall thickness (best illustrated in Figs. 2 and 4). The spring element 12 includes a single longitudinal slot 18 that extends the entire length of the tube to define parallel opposite slot edges 20, 22. The slot 18 allows the element 12 to expand radially by applying an axial force to the first and second ends of it. The inner wall edges are chamfered 24 to facilitate the sliding of the walls over the surfaces of the loading cone 14, 16 (best illustrated in Fig. 7).
    [0013] [0013] The loading cones 14, 16 are of identical shapes and are symmetrically inverted to provide opposing compression and axial extension forces on the tubular spring element 12. Referring to Fig. 8, the loading cones 14, 16 ( only 14 is shown) are generally tapered in shape and preferably have at least one wall section (primary loading wall) 26 with a wall angle 0 'of not less than 11 degrees. In the present embodiment, a wall angle of less than 11 degrees tends to create a friction lock, while a wall angle of more than 11 degrees minimizes the stroke length and increases the diameter of the overall spring assembly. It should be understood that the critical wall angle for the primary loading wall 26 is based on the type of material used,
    [0014] [0014] Back to Figs. 9-12, the loading cones 14, 16 are axially compressible towards each other within the open ends of the slotted tubular spring element 12 whereby the slotted tubular spring element 12 expands radially under tension to create a force opposite radial contraction. Fig. 9 illustrates an initial resting state. Fig. 10 illustrates initial preload and expansion out of the spring element. Fig. 11 illustrates compression and total axial load. The deformation of the tubular spring element 12 elastically stores energy that will return the spring element 12 to its normal resting shape when released. When released, as shown in Fig. 12, the spring element 12 contracts elastically (inwardly), in turn creating an axial extension force, and returns the cones 14, 16 to their normal resting positions.
    [0015] [0015] Back to Fig. 13, modalities of the present polymer compression spring 10 can be advantageously used in a dispensing pump 100 for various liquids, lotions, etc. contained in a bottle or other container (not shown) In some exemplary embodiments, all components of both the dispenser pump 100 and the compression spring assembly 10 are molded from the same plastic material that makes the entire dispensing pump 100 including the spring set 10 easily recyclable in a single classification of plastic material.
    [0016] [0016] The dispensing pump 100 comprises an accumulator cup 102 having a dip tube receptacle 104 and ball valve 106 at a lower end thereof. A tubular guide 108 is received at the upper end of the accumulator cup 102, and the tubular guide 108 is secured to a neck of the container (not shown) with a threaded cap ring 110. The present compression spring set 10 is received and guided inside the tubular guide 108. As noted here, angle 9! of the loading wall 26 of the loading cones 14, 16 is a critical factor in determining the diameter of the general spring assembly. As seen in this type of pump 100, the spring assembly 10 fits into the inner walls of the guide 108 which, in turn, fit into the neck of the container. Thus, the wall angle, material and profile of the spring element are all factors in determining this specification. A piston rod 112 is received axially through the loading cones 14, 16 and the tubular spring element 12 and extends through the base of the guide 108 into the interior of the accumulator cup 102 where the end end is equipped with a piston 112 forming a seal with the inner wall of the accumulator 102. A nozzle head 116 is attached to the upper end of the piston rod 112 and received over the upper loading cone 16.
    [0017] [0017] In operation, a forced downward compression of the nozzle head 116 causes a corresponding downward axial movement of the upper loading cone 16 and deflection outward and loading of the spring element 12 as per the illustrations previously described in Figs. 9-12. Upon subsequent release of the nozzle head 116, the tubular spring element 12 contracts elasticly back to its normal resting shape and position (see also Fig. 12), causing a forced upward movement of the upper loading cone 16, stem piston 112, piston 114 and nozzle head 116 back to their normal resting positions. Pump assembly 100 and ball valve 106 operate as is known in the art to draw material onto the dip tube 104 and dispense material through the nozzle head 116.
    [0018] [0018] Now back to Figs. 14-21, some embodiments of the spring assembly 200 may include a modified split tubular spring element 202 having stress reducing ribs 204, 206 extending along opposite edges 208, 210 of the longitudinal slot 212. Ribs 204,206 may include symmetrical convex surfaces extending both radially outward 204a, 206a (see Figs. 15 and 16) and circumferentially outward 204b, 206b (see Fig. 14) of the slit edges 208, 210. This embodiment 202 additionally includes a first minor wall thickness 214 at the slit edges 208, 210 adjacent to tension ribs 204, 206 and a second minor wall thickness 216 diametrically opposite the slit edges 208, 201 (see Fig. 15). The arched surfaces 204a, 204b, 206a, 206b together with the increasing wall thickness away from the slit edges 208, 210 more evenly distribute the stress throughout the spring element 202 and prolong the life cycle of the spring element 202 Fig. 17 illustrates the spring element 202 in an expanded loaded state. Figs. 18 and 19 illustrate the motion vectors (arrows) associated with the corners of the slit edges 208, 210. The reduced volume of material in these areas allows these corners to deform more easily and reduces stress. The present spring element 202 is used in combination with the same loading cones 14, 16 previously described. Figs. 20 and 21 show axial compression of the present embodiment 200 with exemplary loading cones 14, 16. The present spring assembly 200 can be used in the same types of dispensing pumps 100 previously described with longer spring life.
    [0019] [0019] Referring now to Figs. 22-28, other modalities of the compression spring assembly 300 include a slotted tubular spring element 302 that is hyperboloid in shape, that is, having a smaller (more reduced) diameter in the center and symmetrically larger diameters at the ends, and first and according to opposite loading cones 304, 306. The spring element 302 has a uniform wall thickness (see Figs. and 26) and includes a single longitudinal slot 308 (Figs. 23 and 24) that extends the entire length of the tube , allowing the spring element 302 to expand radially by applying an axial force to the first and second ends thereof. The curved spring wall of the hyperboloid spring 302 is provided with a more rigid loading profile (larger loading profile) using the same amount of plastic material compared to the cylindrical shape previously described (Figs. 1-12). The inner wall edges are also chamfered 310 to facilitate the sliding of the spring element 302 over the wall surfaces of the loading cone 304, 306 (See Fig. 26). The hyperboloid shape of the spring element 302 works most efficiently with loading cones 304, 306 having a single frustoconical loading wall 312 with a slightly steeper wall angle 03 (Fig. 22). The preferred embodiment illustrated shows a wall angle 93 greater than 11 degrees. As noted here, the particular wall angle 0 is selected based on the tensile characteristics of the spring element 302, as well as the material and surface finishes. The exemplary modalities should be illustrative, but not limiting.
    [0020] [0020] Back to Figs. 27 and 28, the present hyperboloid compression spring assembly 300 serves to be advantageously used as an external spring return in certain dispensing pumps 400 for various liquids, lotions, etc. As described here, in many exemplary embodiments, all components of both dispenser pump 400 and compression spring assembly 300 are molded from the same plastic material, making the entire dispensing assembly easily recyclable in a single classification of plastic material .
    [0021] [0021] Referring to Figs. 27-28, the dispensing pump 400 comprises an accumulator cup 402 which is attached to the neck of a container 404 with a screw closure 406. A nozzle head 408 is received on a piston rod 410 which extends through the closure 406 and to the interior of the accumulator 402. A piston seal 411 is received at the terminal end of the piston rod 410, forming a seal with the internal walls of the accumulator. The loading cones 304, 306 of the present hyperboloid compression spring set 300 are integrated into the opposite outer surfaces of the closure 406 and the upper end of the piston rod 410 and the split tubular hyperboloid spring element 302 is received by pressure fitting over and around piston rod 410 and upward from cone extension 304 to closure 406 so that it engages the ramped walls of loading cone 304, 306 of piston stem 410 and closure 406.
    [0022] [0022] In operation, a forced downward compression of the nozzle head 408 causes a corresponding downward axial movement of the upper loading cone (piston rod head) 410/306 and deflection out and loading of the similar spring element 302 to the illustrations previously described in Figs. 9-12. Upon subsequent release of the nozzle head 408, the tubular spring element 302 contracts elasticly (radially inward) back to its normal resting position and shape, causing a forced upward movement of the upper loading cone (piston rod) 410/306 and nozzle head 408 back to their normal resting positions. The pump assembly 400 operates as is known in the art to extract material over an immersion tube connection 412 and dispense material through the nozzle head 408.
    [0023] [0023] Referring to Figs. 29 and 30, another exemplary pump dispenser modality is illustrated and indicated in general by 500. The dispensing pump 500 comprises an accumulator 502 which is fastened inside the neck of a container 504 with a screw closure 506. The accumulator 502 has an inlet of the immersion tube 508 formed in the lower wall thereof. A nozzle head 510 is received on a piston rod 512 which extends through a second closing ring 514 attached to the top of the accumulator 502 and to the interior of the accumulator 502. A piston seal 516 received at the terminal end of the piston rod 512, forming a seal with the internal walls of the accumulator 502. The compression spring assembly 518 is received inside the accumulator 502, similar to the embodiment in Fig. 13, and comprises a cylindrical split tubular spring element 520 and first and second cones loading cone 522, 524. The first loading cone 522 of the present embodiment is an independent component that is supported on a shoulder 526 formed in the accumulator wall. The piston rod 512 extends coaxially through the first loading cone 522 in such a way that the piston seal 516 is located below the first loading cone 522. The second loading cone 524 is integrated into the outer surface of the piston rod 512 Note that the loading cones 522, 524 have a single uniform loading surface. The split tubular spring element 520 is received coaxially around the piston rod 512 and between the first and second loading cones 522, 524.
    [0024] [0024] The operation of the dispensing pump 500 is similar to that described with respect to the modality in Fig. 13.
    [0025] [0025] Referring to Fig. 31, another exemplary embodiment is illustrated and in general indicated by 600. The dispensing pump 600 in general comprises a pump base 602, a dispensing head 604 and a compression spring assembly of polymer 606. The pump base includes an accumulator 608 trapped inside the neck of a container (not shown)
    [0026] [0026] Compression under the dispensing head 604 causes corresponding downward compression of the piston rod 616 and the second loading cone 624, and elastic radial expansion of the slotted tubular spring element 620. The material inside the accumulator chamber is pumped through a port 626 in the piston rod wall 616 in an inner and upward rod passage path within the dispensing head 604. As described here, releasing the dispensing head 604 frees the spring element 620 to contract radially and create upward axial force to return piston rod 616 and dispensing head 604 back to their normal resting positions.
    [0027] [0027] Fig. 32 illustrates a slightly modified modality 600A where the inner passage of piston rod 616 is widened to improve material flow.
    [0028] [0028] Fig. 33 illustrates another modified modality 600B where the tip of the second loading cone 624 is truncated and the accumulator 608 is slightly shorter in length.
    [0029] [0029] Fig. 34 illustrates yet another modality 600C where the second loading cone 624 is molded as a separate component and attached to an end end of piston rod 616 below piston seal 618.
    [0030] [0030] Now back to Figs. 35-48 a preferred exemplary embodiment of the dispensing pump is illustrated and generally indicated by 700. The dispensing pump 700 comprises a pump base assembly 702, a dispensing head 704 and a polymer compression spring assembly 706. The pump base assembly 702 includes an accumulator cup 708 that is fastened inside the neck of a container (not shown) with a closing ring 710. In the example illustration, the closing ring 710 is threaded for attachment to a neck of threaded container. Referring to Figs. 38 and 40, the accumulator 708 has an immersion tube inlet 712 formed in the lower wall thereof and a ball valve 714 is located inside the inlet of the immersion tube 712. The dispensing head 704 is integrally formed in the upper end of a piston rod 716 extending through the closing ring 710 and into the accumulator 708. The piston rod 716 is guided axially inside the accumulator 708 by an annular flap 718 which is threaded into the upper peripheral edge of the accumulator 708. A piston seal 720 (see Figs. 37-38) is received at piston rod 716 in the middle along its length.
    [0031] [0031] The compression spring set 706 is received inside the accumulator 708, and comprises a cylindrical slotted tubular spring element 722 and first and second loading cones 724, 726. The first loading cone 724 of the present embodiment is integrally formed with the bottom wall of the accumulator 708 and extends upwards around the inlet of the immersion tube 712 and ball valve 714.
    [0032] [0032] The second loading cone 726 is molded as a separate cup-shaped component with an open top, an empty interior and internal ribs 728 which are received in pressure fitting on corresponding protrusions 730 of the piston rod end end
    [0033] [0033] The loading cones 724, 726 have both the pre-loading surface A and the primary loading surface B described above. The cylindrical split tubular spring element 722 is received inside the accumulator 708 between the first and second loading cones 724, 726. Although the exemplary embodiment here is illustrated with a cylindrical tubular spring element 722, it should be understood that the spring 722 can comprise any of the spring elements described herein.
    [0034] [0034] Back to Figs. 43-48, a complete dispensing sequence for the present embodiment 700 is illustrated. Fig. 43 illustrates an initial position with loading cones 724 slightly preloaded and ball valve 714 closing the inlet port of dip tube 712. During assembly, flap 718 is threaded down on top of accumulator 708 and compress the various components together in a slightly preloaded condition. From Fig. 44, downward compression of the dispensing head 704 and piston rod 716 causes corresponding downward compression of the second loading cone 726, the beginning of the radial elastic expansion of the split tubular spring element 722, and opening a dispensing passage between the base of the piston seal 720 and the top edge of the second loading cone 726. In Fig. 45, additional downward compression of the dispensing head 704 moves both the loading cone 726 and the seal piston 720, providing pumping action. A set of circumferentially spaced guide ribs 732 extending longitudinally downward on the outer wall of the piston rod 716 has terminal projections 734 that engage the central ring of the piston seal 720 and cause corresponding downward movement thereof along with the head. dispensing 704. Material inside accumulator 708 is forced down into the second loading cone 726, up into the passage path of the inner stem 729 and up into the dispensing head 704. Back to Figs. 46-48, dispensing head release 704 releases spring member 722 to contract radially and create upward axial force to return piston rod 716, piston seal 720 and dispensing head 704 back to their positions in normal rest. Returning to the initial position, ball valve 714 is opened (Fig. 46) to extract fresh material from the container into accumulator 708 (Fig. 47). At the end of the pump stroke, the ball valve 714 settles to close the inlet of the immersion tube 712.
    [0035] [0035] It can therefore be seen that the exemplary modalities provide exclusive and innovative dispensing pump sets in which all discrete components can be molded from a single plastic material to facilitate the recycling of plastic in a single chain. - In addition, all-plastic compression spring assemblies can advantageously be used in all-plastic dispensing pumps which can then also be easily recycled.
    [0036] [0036] Although certain specific structures that incorporate various modalities of the invention have been shown and described here, it is clear to those skilled in the art that various modifications and rearrangements of the parts can be made without departing from the spirit and scope of the basic inventive concept and that the same it is not limited to the particular forms shown and described herein, except as indicated by the scope of the appended claims.
    权利要求:
    Claims (20)
    [1]
    1. Dispensing pump, characterized by the fact that it comprises: a pump base; a dispensing head including a piston rod that is axially guided inside the pump base; and a compression spring assembly comprising: a slotted tubular spring element formed of a strength polymer material; a first loading cone received at a first end of said slotted tubular spring element, said first loading cone being fixed in relation to said pump base; and a second loading cone received at said second end of said slotted tubular spring element, said second loading cone being movable with respect to said pump base, said tubular spring element being received coaxially around the piston rod between said first and second loading cones, said second loading cone being axially compressible with said piston rod towards the first loading cone and within said slotted tubular spring element, whereby said slotted tubular spring expands radially under tension to create a spring force of opposite axial extension.
    [2]
    2. Dispensing pump according to claim 1, characterized in that said split tubular spring element is cylindrical.
    [3]
    Dispensing pump according to claim 1, characterized in that said slotted tubular spring element has strain reducing ribs that extend longitudinally along opposite slit edges.
    [4]
    4. Dispensing pump according to claim 1, characterized by the fact that said split tubular spring element is hyperboloid in shape.
    [5]
    5. Dispensing pump, characterized by the fact that it comprises: a pump base including an accumulator; a dispensing head including a piston rod that is guided inside the pump base and has an end end that extends into the accumulator; a piston seal received at the terminal end of the piston rod and forming a seal with the internal walls of the accumulator; and a compression spring assembly comprising: a slotted tubular spring element formed of a strength polymer material; and first and second loading cones received at the first and second opposite ends of said slotted tubular spring element, said piston rod extending coaxially through said first loading cone which is fixed in relation to said pump base, and additionally extending coaxially through said second loading cone which is movable with said dispensing head in relation to said pump base, said tubular spring element being received coaxially around the piston rod between said first and second cones of loading, said second loading cone being axially compressible with said dispensing head towards the first loading cone and within said slotted tubular spring element, whereby said slotted tubular spring element expands radially under tension to create a spring force of opposite axial extension.
    [6]
    6. Dispensing pump according to claim 5, characterized in that said split tubular spring element is cylindrical.
    [7]
    Dispensing pump according to claim 5, characterized in that said slotted tubular spring element has strain reducing ribs that extend longitudinally along opposite slit edges.
    [8]
    8. Dispensing pump according to claim 5, characterized by the fact that said split tubular spring element is hyperboloid in shape.
    [9]
    Dispensing pump according to claim 5, characterized by the fact that said first and second loading cones are disposed within the accumulator.
    [10]
    Dispensing pump according to claim 5, characterized in that the first loading cone integrally formed with an upper outer surface of said pump base, said second loading cone being integrally formed with an upper portion of said piston rod adjacent to said dispensing head.
    [11]
    Dispensing pump according to claim 10, characterized in that the split tubular spring element is hyperboloid in shape.
    [12]
    12. Dispensing pump, characterized by the fact that it comprises: a pump base including an accumulator;
    a dispensing head including a piston rod that is guided inside the pump base and has an end end that extends into the accumulator; a piston seal received around the piston rod; and a compression spring assembly disposed within said accumulator, said compression spring assembly comprising: a slotted tubular spring element formed of a strength polymer material; and first and second loading cones received at the first and second opposite ends of said slotted tubular spring element, said first loading cone being integrally formed with a lower wall of said accumulator, said second loading cone being received at said end terminal of said piston rod and being movable with said dispensing head in relation to said first loading cone, said tubular spring element being received coaxially around the piston rod between said first and second loading cones, the said second loading cone being axially compressible with said dispensing head towards the first loading cone and within said split tubular spring element, whereby said split tubular spring element expands radially under tension to create a spring force of opposite axial extension.
    [13]
    Dispensing pump according to claim 12, characterized in that said slotted tubular spring element is cylindrical.
    [14]
    Dispensing pump according to claim 12,
    characterized by the fact that said slotted tubular spring element has stress reducing ribs that extend longitudinally along opposite slit edges.
    [15]
    Dispensing pump according to claim 12, characterized in that it additionally comprises an immersion tube port within said lower wall, and additionally having a ball valve within said immersion tube port.
    [16]
    Dispensing pump according to claim 12, characterized in that said pump base additionally includes a closing ring which secures said accumulator to a neck of a container.
    [17]
    Dispensing pump according to claim 15, characterized in that said pump base additionally includes a closing ring which secures said accumulator to a neck of a container.
    [18]
    18. Dispensing pump, characterized by the fact that it comprises: a pump base including an accumulator having an immersion tube port within a lower wall, and additionally having a ball valve within said immersion tube port, the said pump base additionally including a closing ring which secures said accumulator to a neck of a container; a dispensing head including a piston rod that is guided inside the pump base and has an end end that extends into the accumulator; a piston seal received around the piston rod and forming a seal with internal walls of the accumulator; and a compression spring assembly disposed within said accumulator, said compression spring assembly comprising:
    a slotted tubular spring element formed from a strength polymer material; and first and second loading cones received at the first and second opposite ends of said slotted tubular spring element, said first loading cone being integrally formed with said lower wall of said accumulator, said second loading cone being received in said terminal end of said piston rod and being movable with said dispensing head in relation to said first loading cone, said tubular spring element being received coaxially around the piston rod between said first and second loading cones, said second loading cone being axially compressible with said dispensing head towards the first loading cone and within said slotted tubular spring element, whereby said slotted tubular spring element expands radially under tension to create a spring force of opposite axial extension.
    [19]
    19. Dispensing pump according to claim 18, characterized in that said slotted tubular spring element is cylindrical.
    [20]
    Dispensing pump according to claim 18, characterized in that said slotted tubular spring element has strain reducing ribs that extend longitudinally along opposite slit edges.
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    同族专利:
    公开号 | 公开日
    EP3735542A4|2021-03-24|
    US10138971B1|2018-11-27|
    US20190203794A1|2019-07-04|
    WO2019136003A1|2019-07-11|
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    US11035429B2|2018-01-03|2021-06-15|Silgan Dispensing Systems Corporation|Compression spring assembly and methods of using the same|
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    USD920805S1|2019-05-30|2021-06-01|Berlin Packaging, Llc|Container with pump actuator|
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    法律状态:
    2021-12-07| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-12-07| B08F| Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]|Free format text: REFERENTE A 3A ANUIDADE. |
    2022-01-11| B08G| Application fees: restoration [chapter 8.7 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US15/861,108|2018-01-03|
    US15/861,108|US10138971B1|2018-01-03|2018-01-03|Dispensing pump with polymer compression spring assemby|
    PCT/US2018/067986|WO2019136003A1|2018-01-03|2018-12-28|Dispensing pump with polymer compression spring assembly|
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