Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
  • B05B11/0064—Lift valves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0037—Containers
  • B05B11/0039—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means
  • B05B11/0044—Containers associated with means for compensating the pressure difference between the ambient pressure and the pressure inside the container, e.g. pressure relief means compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/0005—Components or details
  • B05B11/0062—Outlet valves actuated by the pressure of the fluid to be sprayed
  • B05B11/007—Outlet valves actuated by the pressure of the fluid to be sprayed being opened by deformation of a sealing element made of resiliently deformable material, e.g. flaps, skirts, duck-bill valves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1028—Pumps having a pumping chamber with a deformable wall
  • B05B11/1032—Pumps having a pumping chamber with a deformable wall actuated without substantial movement of the nozzle in the direction of the pressure stroke
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1028—Pumps having a pumping chamber with a deformable wall
  • B05B11/1033—Pumps having a pumping chamber with a deformable wall the deformable wall, the inlet and outlet valve elements being integrally formed, e.g. moulded
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1028—Pumps having a pumping chamber with a deformable wall
  • B05B11/1035—Pumps having a pumping chamber with a deformable wall the pumping chamber being a bellow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1059—Means for locking a pump or its actuation means in a fixed position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1066—Pump inlet valves
  • B05B11/1067—Pump inlet valves actuated by pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1042—Components or details
  • B05B11/1073—Springs
  • B05B11/1077—Springs characterised by a particular shape or material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1097—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle with means for sucking back the liquid or other fluent material in the nozzle after a dispensing stroke

Definitions

• This invention relates to liquid dispensing pump devices for use with liquid consumer product containers; more particularly, to such liquid dispensing pump devices which utilize a collapsible pump chamber (e.g., a bellows).
• a collapsible pump chamber e.g., a bellows.
• Known liquid dispensing pump devices for use with consumer product containers are many and varied. Such dispensing pumps may be utilized to deliver liquids as a foam, a spray, or a liquid stream (e.g., as with moisturizing lotions), for example. Most commonly, such liquid dispensing pump devices utilize a piston and cylinder pump chamber. Such pump chambers require that a liquid tight moving seal be maintained between the piston and the cylinder. Disadvantages are commonly associated with this liquid tight seal requirement.
• piston and cylinder dispensing devices have generally been designed without significant effort to reduce the number of parts and overall cost.
• liquid dispensing pump devices which utilize pump chambers with collapsible walls which overcome some of the disadvantages of piston and cylinder pump chambers.
• balloon type pump chambers have been utilized.
• flexible, resilient bellows have been utilized as collapsible pump chambers in liquid dispensing pump devices.
• Such bellows-type pumps permit the pump chamber to expand and contract in volume without the disadvantages associated with the moving seal required in piston and cylinder pumps.
• the bellows can replace the piston, the cylinder and the spring; thereby reducing molding and assembly costs.
• a manually operated dispensing pump device for pumping a liquid product rom a supply container through a discharge orifice.
• the pump device including a housing for sealingly mounting the dispensing pump device onto the supply container.
• the housing including a portion of a liquid passage providing fluid communication from the supply container downstream to the discharge orifice.
• An inlet valve is located within the liquid passage which is closed to prevent liquid flow therethrough during periods of positive downstream pressure and is open during periods of negative downstream pressure.
• An outlet valve is located within the liquid passage which is open to permit liquid flow therethrough during periods of positive upstream pressure and is closed during periods of negative upstream pressure.
• a shipping seal including two functional elements which cooperate when in a closed position to seal the liquid passage and cooperate when in an open position to permit liquid flow through the liquid passage is also provided.
• a collapsible pump chamber defining a portion of the liquid passage downstream of the inlet valve and upstream of the outlet valve, the collapsible pump chamber including one of the functional elements of the shipping seal as an integral component thereof.
• the manually operated dispensing pump device includes a locking feature operatively associated with the housing which prevents actuation of the pump device when the shipping seal is in the closed position and which permits actuation of the pump device when the shipping seal is in the open position.
• the manually operated dispensing pump device preferably includes a removable tamper evident tab operatively associated with the upper housing or the lower housing which prevents actuation of the pump device prior to removal of the tamper evident tab.
• a collapsible pump chamber for use in a manually operated dispensing pump includes a valve as an integral component thereof.
• the valve includes a valve member, a valve seat and a valve opening which are all integral components of a wall of the collapsible pump chamber, the valve seat facing one side of the walTand the valve member being formed at an angle away from the other side of the wall so that upon pushing the valve member through the valve opening the valve member is biased against the valve seat.
• Figure 1 is a expanded perspective view from above of a particularly preferred embodiment of the liquid dispensing pump of the present invention
• Figure 2 is a expanded perspective view from below of the liquid dispensing pump of Figure 1;
• Figure 3 is a cross-sectional view taken along the center line with the tamper evident tab intact and shipping seal closed;
• Figure 4 is a cross sectional view, similar to Figure 3 with the tamper evident tab removed and the shipping seal open;
• Figure 5 is a cross sectional view, similar to Figure 3, of the pump of Figure
• Figure 6 is a cross sectional view, similar to Figure 3, of the pump of Figure 1 in operation, during the misstroke;
• Figure 7 is a cross-sectional view, similar to Figure 3, of another preferred embodiment of the liquid dispensing pump of the present invention for pumping relatively large volumes;
• Figure 8 is a cross-sectional view, similar to Figure 3, of another preferred embodiment of the liquid dispensing pump of the present invention with a stationary nozzle with the shipping seal open;
• Figure 9 is a cross sectional view, similar to Figure 5, of the pump of Figure 8 in operation, during the downstroke;
• Figure 10 is a cross sectional view, similar to Figure 6, of the pump of Figure 8 in operation, during the misstroke;
• Figure 11 is a cross sectional view, similar to Figure 6, of an alternative venting arrangement;
• Figure 12 is a cross sectional view, similar to Figure 6, of another alternative venting arrangement
• Figure 13 is a cross sectional view, similar to Figure 6, of another alternative venting arrangement.
• FIG 14 is a cross sectional view, similar to Figure 6, of another alternative venting arrangement.
• a liquid dispensing pump device indicated generally as 20.
• This dispensing pump device 20 is particularly useful in conjunction with a liquid product supply container 22 (seen partially in Figure 3).
• the illustrated liquid dispensing pump 20 basically includes an upper housing 24, a lower housing 26, an outlet valve member 30, and inlet vent member 34, a diptube 38, and a collapsible pump chamber 40.
• collapsible pump chamber is defined as a pump chamber delineated - at least partially - by a flexible wall which moves in response to a manual compressive force in such a way that the volume within the pump chamber is reduced without sliding friction between any components delineating the pump chamber.
• collapsible pump chambers may include balloon-like diaphragms and bladders made from elastomeric materials such as thermoplastic elastomers, elastomeric thermosets (including rubber), or the like.
• the collapsible pump chamber may include a helical metal or plastic spring surrounding (or covered by) an elastic material; creating an enclosed pump chamber.
• the illustrated and preferred collapsible pump chamber is a bellows 40; i.e., a generally cylindrical, hollow structure with accordion-type walls. Bellows are preferred, for example, because they can be made resilient to act like a spring; eliminating the need for a spring.
• the collapsible pump chamber includes a functional element of a shipping seal as an integral component thereof, as described hereinafter. As used herein, the term "integral" is defined as molded, or otherwise formed, as a single unitary part. Referring to Figure 3, the upper housing 24 is telescoped onto the lower housing 26 and retained by cooperation between an annular collar 25 and an annular rib 27. The lower housing 26 includes screw threads 28 which operate to sealingly attach the pump device 20 to the container 22.
• the lower housing 26 may utilize a bayonet-type attachment structure (not seen) such as that described, for example, in U.S. Patent 4,781,311 issued to Dunning et al. on November 1, 1988; or U.S. Patent 3,910,444 issued to Foster on October 7, 1975.
• the lower housing 26 includes an inlet passage 42 with an inner conical inlet valve seat 35 which cooperates with the inlet valve member 34 to form the inlet valve 34 and 35.
• the lower housing 26 includes three equally spaced retaining tabs 36 which retain the inlet valve member 34 during operation of the pump devjce 20, as discussed hereinafter.
• a ball valve could be utilized.
• the lower housing 26 also includes a vent opening 37, three equally spaced actuation lugs 44, a cooperating lug 45, and three equally spaced anti-rotation lugs 46. Friction fit onto the inlet passage 42 of the lower housing 26 is a diptube 38 which extends down into the container 22.
• the upper housing 24 includes an outlet passage 48; terminating in a dispensing opening 50.
• An inner cylindrical wall 52 is located within the upper housing 24 at an angle to, and connected with the outlet passage 48.
• the upper housing 24 includes a collar 25 with three equally spaced actuation channels 54, three stops 56, three pairs of tactile lugs 58, a projection 60, and a removable tamper evident tab 62.
• the phrase "tamper evident” is defined as providing evidence that the pump has been previously actuated; not necessarily that the product has not been tampered with (since the entire pump device may be unscrewed and replaced). Tamper evidence, in this sense is important because it discourages sampling of the product on the store shelf.
• the housing 24 and 26 could include any tamper evident feature (not seen) known in the art to indicate that there has been removal of the pump device 20 from the container 22.
• Passing through the housing 24 and 26 is a liquid passage which is delineated by several parts, including the diptube 38, the inlet passage 42 of the lower housing 26, the outlet passage 48 of the upper housing 24, and the collapsible pump chamber 40.
• the liquid passage provides fluid communication from the distal end of the dip tube 38 within the supply container 22 in a downstream direction to the discharge orifice.
• downstream is defined as in the direction from the supply container 22 to the discharge orifice 50; and “upstream” is defined as in the direction from the discharge orifice 50 to the supply container 22.
• the phrase “inlet end” means the upstream end; and the phrase “outlet end” means the downstream end.
• the collapsible pump chamber 40 has a structure which is flexible such that it can be manually compressed; thereby reducing the volume within the collapsible pump chamber 4Q. Although a spring (not seen) may be utilized to help return the collapsible pump chamber 40 to its original shape, the collapsible pump chamber 40 is preferably sufficiently resilient that it returns to its initial shape when the manual compression force is released.
• the illustrated collapsible pump chamber is a bellows 40.
• a preferred bellows 40 should have several qualities.
• the bellows 40 should make the pump device easy to actuate. Generally this means having a spring force from about three pounds to about five pounds.
• the bellows 40 should also have good resiliency with minimal hysterisis and creep.
• the bellows 40 preferably has good stiffness in the radial direction (hoop strength) to ensure the bellows 40 is not radially deformed under normal operating conditions.
• the bellows 40 preferably has a good volumetric efficiency; i.e., change in internal volume divided by the total expanded internal volume.
• Some geometric features which can be utilized to endow the bellows 40 with the appropriate qualities include the diameter of the bellows 40. The larger the diameter the lower the spring force and the lower the radial stiffness. Although lower spring force is generally desirable, lower radial stiffness can be a problem; e.g., the bellows 40 might blow out in a precompression trigger sprayers. Increasing the wall thickness of the pleats will increase radial stiffness but it increases the spring force and results in decreased volumetric efficiency of the bellows. Reducing the pleat angle generally decreases the spring force but decreases the volumetric efficiency.
• the pleat angle is the aggregate of two angles; the angle above a line normal to the axis and passing through the origin of a pleat and the angle below that line. Preferably, the pleat angle above the normal line is about 30° and the pleat angle below the normal line is about 45° (making removal of the bellows from the core pin easier). Increasing the number of pleats will lower the spring force and lower the volumetric efficiency.
• the major components of the spring force are the wall thickness and the upper and lower pleat angles while the major component of resiliency is material selection.
• Material selection can also help endow the bellows 40 with the appropriate qualities.
• the material preferably has a Young's modulus below 10,000 psi.
• the material should enable retention of mechanical properties, be dimensionally stable and be resistant to stress cracking. These properties should be present over time in air and in the presence of the liquid product.
• the material should not be pH sensitive and should not undergo hydrolysis.
• Exemplary such materials include polyolefins such as polypropylene, low density polyethylene, very low density polyethylene, ethylene vinyl acetate.
• thermosets e.g., rubber
• thermoplastic elastomers Most preferred for trigger sprayers is a high molecular weight ethylene vinyl acetate with a vinyl acetate content between about 10 and 20 percent.
• ethylene vinyl acetate with a vinyl acetate content between about 10 and 20 percent.
• pH and hydrolysis may not be an issue. Instead a low spring force with a high resiliency may be more important. In such cases a low modulus ethylene vinyl acetate or a very low density polyethylene are preferred.
• An exemplary bellows 40 made of ethylene vinyl acetate or very low density polyethylene might have a 0.6 in inner large diameter and a 0.4 inch inner small diameter and a wall thickness of between about 0.02 inch and 0.03 inch.
• the aggregate pleat angle would be about 75°; with the upper pleat angle 30° and the lower pleat angle 45°.
• the inlet end of the manually compressible pump chamber 40 is attached by friction fit to the generally cylindrical inner wall of the lower housing 26.
• the collapsible pump chamber 40 includes an integral annularly extending flange 64 near its inlet end. This flange 64 seals against the interior surface of the lower housing 26; to form a vent valve 26 and 64.
• the vent valve 26 and 54 includes the flange 64 which operates as a valve member and the housing 26 which provides the valve seat.
• the outlet end of the collapsible pump chamber 40 is attached by friction fit to the inner cylindrical wall 52 of the upper housing 24.
• the outlet end of the collapsible pump chamber 40 includes an elongate channel 66 which has an integral outlet valve seat 32 which cooperates with the outlet valve member 30 to form the outlet valve 30 and 32.
• the elongate channel 66 also includes an integral outlet opening 68.
• the inlet valve member 34 and 35 and an outlet valve member 30 and 32 are located within the liquid passage. These valves may be of any type known in the art, including duckbill, ball, poppet or the like.
• the outlet valve member 30 is a lightweight ball or poppet valve member which provides suckback, as discussed hereinafter.
• the liquid dispensing pump 20 is in the closed position.
• the outlet opening 68 of the bellows 40 is misaligned with the outlet passage 48; providing a fluid tight shipping seal.
• the shipping seal includes several functional elements; e.g., the outlet opening 68 and the cylindrical wall 52 which can be moved relative thereto to seal the outlet opening 68. Therefore, the liquid passage which flows through the diptube 38, inlet passage 42 of the lower housing 26, the bellows 40, and the outlet passage 48 of the upper housing 24 is sealed closed; thereby providing a shipping seal.
• actuation lugs 44 are misaligned with the actuation channels 54 which prevents actuation of the pump device 20 when the shipping seal is closed. Without this feature, a increase in the pressure within the collapsible pump chamber 40 which might damage the collapsible pump chamber 40 could be caused by attempted actuation of the pump device 20 while the shipping seal is closed. In the closed position, one side of the upper end of each actuation lug 44 is located against one end of each stop 56. The other side of each actuation lug 44 is located against one of the tactile lugs 58.
• the tamper evident tab 62 extends generally horizontally from the upper housing 24 over the top end of the lower housing 26.
• the illustrated tamper evident tab 62 includes a slot 63 which cooperates with a locking lug 45 to prevent rotation of the upper housing 24 relative to the lower housing 26.
• the shipping seal cannot be opened without removal of the tamper evident tab 62.
• the pump device 20 cannot be actuated without removing the tamper evident tab 62.
• the liquid dispensing pump 20 is in the open position.
• the upper housing 24 may be rotated relative to the lower housing 26 from the closed position to the open position once the tamper evident tab 62 has been removed.
• the tamper evident tab 62 is removed by simply rotating it upwardly. This rotation causes the projection 60 to interfere with the tamper evident tab 62; creating a force which pushes the tab 62 away from the upper housing 24. This force causes the tab 62 to tear away from the upper housing 24 along the thinned line connecting the tab 62 to the upper housing 24.
• each actuation lug 44 moves against the tactile lugs 58 which provide a tactile and/or audible signal that the shipping seal of the dispensing pump device 20 is being moved -first, from the closed position and - second, into the open position.
• the tactile lugs 58 also help maintain the pump device 20 in the open or closed position through interaction with the actuation lugs 44.
• the actuation lugs 44 align with the actuation channels 54. Furthermore, the integral dispensing opening 68 aligns with the outlet passage 48; thereby opening the liquid passage.
• the upper housing 24 is rotated relative to the lower housing 26
• the upper housing 24 is also rotated relative to the bellows 40.
• the bellows 40 remains stationary relative to the lower housing 26 due in part to the cooperation between notches 70 on the inlet end of the bellows 40 and the anti-rotation lugs 46 of the lower housing 26.
• the elongate channel 66 of the bellows 40 rotates within the inner cylindrical wall 52 of the upper housing 24 until the outlet opening 68 aligns with the outlet passage 48.
• Manual actuation of the pump device 20 is accomplished by axially reciprocating the upper housing 24 relative to the lower housing 26. As this reciprocating action is accomplished the actuation lugs 44 slide within the actuation channels 54. During the downstroke of this reciprocating action, the inlet valve member 34 is sealed against the inlet valve seat 35. This causes pressure to increase within the collapsible pump chamber 40 which causes the outlet valve member 30 to move away from the outlet valve seat 32; thereby opening the outlet valve 30 and 32. Consequently, the liquid within the decreasing volume of the collapsible pump chamber 40 is dispensed through the integral outlet opening 68 and the outlet passage 48. As the liquid is dispensed it provides an upward force on the outlet valve member 30 which can move the outlet valve member 30 to the distal end of the integral elongate channel 66.
• the bellows 40 Upon release of the manually compressive force, the bellows 40 begins to expand, due to its resiliency.
• a spring (not seen) may alternatively be added to replace or supplement the resiliency of the bellows 40.
• This expansion creates a negative pressure (i.e., below atmospheric) within the collapsible pump chamber 40. Consequently, atmospheric pressure pushes liquid in the outlet passage 48 back into the bellows 40 (at least relatively viscous liquids) until the outlet valve member 30 again seals against the outlet valve seat 32; thereby closing the outlet valve 30 and 32.
• the longer the integral elongated channel 66 the more time it takes for the valve member 30 to seat, and the more liquid is sucked back into the bellows 40. Such suck back is desirable since it helps keep the dispensing passage clear between operations.
• a large dose embodiment of a dispensing pump device of the present invention is provided.
• This pump device 120 is substantially identical to the previous pump device 20.
• the lower housing 126 extends into the container 122 to permit a bellows 140 of increased length.
• the tamper evident tab 162 is attached to the lower housing 126 instead of the upper housing 124. Although the tamper evident tab 162 does not prevent rotating the pump device 120 between open and closed shipping seal positions, it prevents actuation of the pump device 120 through interference with the nozzle surrounding the outlet passage 148 when in the open shipping seal position. Operation of this pump device 120 is substantially identical to that discussed above with respect to the previous pump device 20.
• FIG. 8 another embodiment of a liquid dispensing pump device of the present invention, indicated generally as 220, is illustrated in the open position.
• This pump device 220 provides a stationary nozzle.
• the housing 124 and 126 of this pump device 220 includes essentially the same tactile lugs 158, actuation lugs 144, and actuation channels 154 found in the previous embodiments.
• this pump device 220 has an open (seen in the drawings) and a closed shipping seal position (not seen) which is functionally similar to those discussed above.
• Both the inlet passage 242 and the outlet passage 248 of the housing 224 and 226, however, are located in the lower housing 226.
• the anti-rotation lugs 246 and their cooperating notches 270 are provided on the upper end of the upper housing 224 and on the bellows 240 , respectively.
• the bellows 240 of this embodiment rotates with the upper housing 224 as the upper housing 224 is rotated relative to the lower housing 226 into the open position.
• This bellows 240 includes the following functional elements integral therewith: the vent valve member 264, the inlet valve member 234, the inlet valve seat 235, the outlet valve member 230, the outlet valve seat 232, and a functional element of the shipping seal 68.
• the vent valve member 264 of this bellows 240 is essentially the same resilient annular flange integral with the previous bellows.
• Each of the inlet valve member 234 and outlet valve member 230 is a "U"-shaped flapper valve member.
• the valve members 234 and 230 are each molded at an angle (e.g., as seen or 90°) to the end wall 275 of the bellows inside the bellows 240 (i.e., in the direction the inlet valve member 234 is oriented in Figure 8).
• the outlet valve member 230 is pushed through the opening so that it rests against the outlet valve seat 232.
• the outlet valve member 230 is biased closed.
• the amount of biasing can be controlled somewhat by modifying the angle at which the outlet valve member 230 is molded, controlling the thickness of the hinge portion 233, and material selection. Consequently, if strong biasing is desired (e.g., in a trigger sprayer application) the angle would be relatively large, the hinge portion 233 can be relatively thick and the bellows 240 can be molded of a highly resilient material. The opposite would be true if a weak biasing force is desired (e.g., a lotion pump where significant suckback is desired). The inlet valve member 234 is not pushed through its opening.
• the inlet valve seat 232 is a thinned ledge integral with the bellows 240.
• the inlet valve seat 232 may be the adjacent horizontal wall of the lower housing 226.
• the bellows 240 Upon release of the manually compressive force, the bellows 240 begins to expand, due to its resiliency. This expansion creates a negative pressure within the pump chamber 240. Consequently, atmospheric pressure pushes liquid in the outlet passage 248 back into the bellows 240 until the outlet valve member 230 again seals against the outlet valve seat 232; thereby closing the outlet valve 230 and 232.
• the lower the biasing force on the outlet valve member 232 the more time it takes for the outlet valve member 232 to seat, and the more liquid is sucked back into the bellows 240.
• Figures 11 through 14 illustrate alternative venting arrangements which may be utilized in lieu of the resilient annular flange integral with the previously described bellows.
• Figure 11 utilizes a separate resilient annular flange 364 which is friction fit internally within the generally cylindrical wall of the lower housing 326.
• the flange 364 operates as a valve member which seals against the inner surface of the generally cylindrical wall operating as the valve seat. Air can enter the container 322 trough the vent opening 337 as indicated by the arrow.
• Figures 12 and 13 utilize a conically shaped flexible member 464 and 564, respectively, which extends from the container 422 neck or lower housing 526, respectively.
• a lug 478 and 578, respectively is included to prevent overtightening of the lower housing 426 and 526 onto the container 422 and 522.
• the generally conical flexible member 464 and 564 operates as the vent valve member which seals against a vent valve seat provided by the adjacent part; thereby forming a vent valve. Air is able to enter the container 422 and 522 on the upstroke of the pump device 420 and 520 in response to differential pressure by passing around the threads 429 and 529 and between the vent valve member 464 and 564 and the vent valve seat 426 and 522.
• Figure 14 utilizes a gasket 664 as the vent valve.
• the gasket is porous such that air can pass through the gasket 664 but the liquid product cannot.
• Materials which can be utilized to make such gaskets 664 are commonly known in the art. For example, sintered polypropylene, and sintered polyethylene (such as porex) may be utilized. Thus air is able to enter the container 622 on the upstroke of the pump device 620 in response to differential pressure by passing around the threads 629 and through the gasket 664.
• liquid dispensing pump devices may be in the form of a trigger sprayer or a foamer. Accordingly, the present invention comprises all embodiments within the scope of the impended claims.

Landscapes

• Reciprocating Pumps (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Closures For Containers (AREA)
• Massaging Devices (AREA)
• Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
• Devices For Checking Fares Or Tickets At Control Points (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)
• Details Of Reciprocating Pumps (AREA)
• Display Devices Of Pinball Game Machines (AREA)
• Jet Pumps And Other Pumps (AREA)

Applications Claiming Priority (5)

Publications (2)

Family

ID=26766307

Family Applications (2)

Family Applications After (1)

Country Status (12)

Families Citing this family (27)

Family Cites Families (6)

• 1994
  • 1994-04-18 CN CN94192584A patent/CN1069232C/zh not_active Expired - Fee Related
  • 1994-04-18 KR KR1019950705976A patent/KR960703353A/ko not_active Application Discontinuation
  • 1994-04-18 ES ES94913425T patent/ES2118403T3/es not_active Expired - Lifetime
  • 1994-04-18 JP JP7502780A patent/JPH08511723A/ja active Pending
  • 1994-04-18 EP EP94919979A patent/EP0705144B1/fr not_active Expired - Lifetime
  • 1994-04-18 CA CA002165314A patent/CA2165314C/fr not_active Expired - Fee Related
  • 1994-04-18 BR BR9406972A patent/BR9406972A/pt not_active Application Discontinuation
  • 1994-04-18 DE DE69411919T patent/DE69411919T2/de not_active Expired - Fee Related
  • 1994-04-18 MX MXPA94002797A patent/MXPA94002797A/es unknown
  • 1994-04-18 JP JP7503463A patent/JPH08511988A/ja active Pending
  • 1994-04-18 KR KR1019950705977A patent/KR960703354A/ko not_active Application Discontinuation
  • 1994-04-18 EP EP94913425A patent/EP0705141B1/fr not_active Expired - Lifetime
  • 1994-04-18 WO PCT/US1994/004255 patent/WO1995001226A1/fr active IP Right Grant
  • 1994-04-18 ES ES94919979T patent/ES2135586T3/es not_active Expired - Lifetime
  • 1994-04-18 AU AU65595/94A patent/AU678463B2/en not_active Ceased
  • 1994-04-18 AT AT94913425T patent/ATE168594T1/de active
  • 1994-04-18 CN CN94192582A patent/CN1071147C/zh not_active Expired - Fee Related
  • 1994-04-18 DE DE69420730T patent/DE69420730T2/de not_active Expired - Fee Related
  • 1994-04-18 BR BR9406962A patent/BR9406962A/pt not_active IP Right Cessation
  • 1994-04-18 CA CA002165315A patent/CA2165315C/fr not_active Expired - Fee Related
  • 1994-04-18 AU AU70917/94A patent/AU7091794A/en not_active Abandoned
  • 1994-04-18 WO PCT/US1994/004254 patent/WO1995000253A1/fr active IP Right Grant

Non-Patent Citations (1)

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