Fluent Product Dispensing Package and Diaphragm Pump For Use Therein
A diaphragm pump (12) is provided for a fluent product dispensing package (10), and includes a rigid pump base (22), a pumping dome (20), and an outlet valve (122). The dome (20) can include a mount ring (30) and a flexible dome member (32) that are permanently bonded to each other, with the ring (30) and the base (22) configured to provide a releasable connection for retaining the dome (20) to the base (22). The valve (122) can be part of an outlet valve cartridge (28) that includes the valve (122), a valve base (120) configured to releasably mount the outlet valve cartridge (26) to the base (22), and a retaining ring (124) for retaining the valve (122) to the base (120).
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This application claims the benefit of the filing date of U.S. Application No. 61/733,029, filed Dec. 4, 2012, which is hereby incorporated by reference.
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENTNot Applicable.
MICROFICHE/COPYRIGHT REFERENCENot Applicable.
TECHNICAL FIELDThe present invention relates to components for dispensing fluid, such as liquid. The components are particularly well suited for use in a diaphragm pump for dispensing liquid, such as hand soap.
BACKGROUND OF THE INVENTION AND TECHNICAL PROBLEMS POSED BY THE PRIOR ARTThere are a variety of components in use in various fluid dispensing systems. Fluid dispensing systems typically include a reservoir for fluid and a discharge structure which may be connected to the fluid reservoir directly or through a conduit.
Some dispensing systems utilize a fluid dispensing pump which has a resiliently deformable diaphragm that defines a convex wall of the cavity into which fluid enters through a one-way inlet structure and from which fluid is discharged through an outlet discharge structure. Such a diaphragm is typically pushed inwardly to pressurize a fluid in the cavity and squeeze the fluid out of the cavity through the discharge structure of the pump. Examples of such pumps are shown in US 2005/0087555 A1; U.S. Pat. No. 6,216,916 B1; U.S. Pat. No. 7,806,301 B1; U.S. Pat. No. 7,434,710 B2; WO 2004/073878 A2; and WO 2004/073870 A2, the entire disclosures of which are incorporated herein by reference.
While there are many known forms of such deformable diaphragm pumps for use in fluid dispensing systems, there is always room for improvements.
While this invention is susceptible of embodiment in many different forms, this specification and the accompanying drawings disclose only specific forms of various aspects of the invention. The invention is not intended to be limited to the embodiments so described, however. The scope of the invention is pointed out in the appended claims.
For ease of description, the components and assemblies of this invention may be described in an upright position as shown in the Figures, and terms such as upper, lower, horizontal, top, bottom, upward, downward, etc., are used with reference to this position. It will be understood, however, that the components and assemblies of this invention may be manufactured, stored, transported, used, and sold in an orientation other than the upright position described herein.
The components of this invention may be employed in various fluid dispensing systems, particularly liquid dispensing systems. Various components of the present invention are particularly well-suited for use in a discharge structure which may be connected to a fluid supply directly or through a conduit. The components of the present invention are especially useful in a fluid dispensing pump which contains a fluid reservoir in the form of a pressurizable cavity having an inlet and an outlet. Aspects of the invention are especially suitable for use with a diaphragm type dispensing pump which has a resiliently deformable diaphragm that defines a convex wall of the cavity into which fluid enters though a one-way valve inlet structure and from which fluid is discharged through an outlet discharge structure. Such a diaphragm is typically pushed inwardly to pressurize the fluid in the cavity and to squeeze the fluid out of the cavity through the discharge structure.
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The housing 11 and over cap 16 can be made from any suitable material, including any suitable plastic material or suitable metallic material that can provide adequate structural support to perform the functions of the housing 11 and over cap 16. The collapsible pouch 14 is of any suitable construction, with such pouches typically having two, opposed, flexible web portions 19 peripherally sealed to one another so as to define an interior region that is adapted to contain the fluent product and also to define an opening for establishing communication between the pouch interior region and the exterior of the pouch via a dispensing fitment assembly, which may incorporate a dispensing valve, and a removable cover, or other similar or dissimilar features, and which typically further includes a fitment body molded from a polymeric material that can be heat-sealed to the web portions of the collapsible pouch. Such constructions are commonly referred to as Bag-On-Valve (“BOV”) packages. Some examples of BOV packages can be seen in U.S. Pat. No. RE 39,520 E, issued Mar. 20, 2007; U.S. Pat. No. 6,439,429, issued Aug. 27, 2002; and U.S. Pat. No. 6,272,307 issued Aug. 14, 2001, the details of which are incorporated herein by reference. Further design details of the housing 11, pouch 14, and the over cap 16 are not critical to the invention described herein and such details may be configured to meet the particular requirements of any specific application, such as, for example, upon the particular type of fluent product being dispensed and the particular environment in which the fluent product dispensing package 10 will be utilized. Accordingly, the details of the components 11, 14 and 16 will not be further described herein except as required to provide an adequate explanation of the features and advantages of the pump 12.
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The inlet valve 24 includes a generally cylindrical mount post 90 having a frusto-conical shaped terminal end 92 that diverges upward to an annular rib 93 that provides a snap-fit connection that retains the inlet valve to the base 22 when the post 90 is inserted through the valve mount bore 62 of the inlet port 46, as best seen in
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The decorative shroud 160 includes a downwardly extending, cylindrical mount wall 180 having a container engaging feature in the form of internal threads 182 for engaging mating external threads 184 provided on the container 11A. While a threaded connection is illustrated, it should be understood that any suitable connection to the container may be used. A radially inwardly opening, annular groove 186 is provided in the shroud 160 to receive a peripheral edge 187 of the mount lip 50A of the pump base 22A to form a snap-fit connection therewith to retain the pump 12A and shroud 160 in assembled relation. The shroud 160 also includes a downwardly facing, planar seal surface 188 for sandwiching a gasket seal 190 against an upper seal surface 192 of the container 10A to prevent leakage of the fluent product from the container 10A. The shroud 160 further includes an angled, planar upper surface 194 with an opening 196 therein through which the dome member 32A extends so that it can be actuated by a user to operate the pump 12A to dispense the fluent product from the outlet cartridge 26A. The shroud 160 also includes a generally vertical wall 198 extending between and connecting the mount wall 180 with the upper surface 194, and having an opening 199 therein through which the outlet cartridge 26A extends. The shroud 160 also includes a plurality of circumferentially spaced, radially outwardly extending bumps 200 that can engage mating features in the cap 16A to provide a snap-fit connection to retain the cap 16A on the shroud 160.
In operation of the pump 12, 12A, a user depresses the dome member 32, 32A (illustrated by arrows A) which increases the pressure inside the pump 12, 12A which, in turn, forces the inlet valve 24, 24A to the closed position to prevent fluent product from being forced back into the container 14, 11A. When the pressure inside the pump 12, 12A reaches the cracking pressure is of the outlet valve 122, 122A, the outlet valve 122, 122A moves to the open position and fluent product is dispensed from the pump 12, 12A through the valve 122, 122A (illustrated by arrows B). The amount of fluent product dispensed depends on how far a user depresses the dome member 32, 32A. The dispensing of the fluent product from the pump 12, 12A reduces the pressure inside of the pump and, when the user's releases the dome member 32, 32A by removing their finger, the resiliency of the dome member 32, 32A returns it to its as-molded condition/position (illustrated by arrows C), which creates even lower pressure inside of the pump 12, 12A. When the pressure inside the pump 12, 12A reaches the cracking pressure of the inlet valve 24, 24A, the inlet valve 24, 24A moves to the open position and fluent product is drawn from the container 14, 11A into the pump 12, 12A through the inlet port 46, 46A, thereby placing the dispensing package 10, 10A in a ready condition wherein fluent product can again be dispensed from the pump 12, 12A.
It should be appreciated that the disclosed pumps 12 and 12A and shroud 160 can be designed to fit onto standard bottles/fluent containers or custom bottles/fluent containers. Furthermore, it should be appreciated that the bi-injected domes 20 and 20A eliminate the need for an additional retaining ring to hold the elastomeric dome member onto the pump base. Additionally, it should be appreciated that the use of thermoplastic elastomer for the dome members 32 and 32A improves oxygen migration performance in comparison to conventional dome members made of silicone. It should also be appreciated that the provision of the inlet valves 24 and 24A that are separate from other operating components of the pumps 12 and 12A allows for better performance and for the ability to change materials and designs to specifically enhance the performance of the valves 12 and 12A without affecting other operating components of the pumps 12 and 12A. It should also be appreciated that the use of the shroud 160 can allow for different decorative appearances while retaining common pump features from one product to the next. It should also be appreciated that the disclosed pumps 12 and 12A allow for a complete snap-fit assembly of all the components of the pumps 12 and 12A.
It should be appreciated that the invention may include any or all of the above described features, include only one of the above features, more than one of the above features, and any combination of the above features. Furthermore, other objects, features, and advantages of the invention will become apparent from a review of the entire specification, including the appended claims and drawings.
Claims
1. A diaphragm pump (12) for a fluent product dispensing package (10), the diaphragm pump (12) comprising:
- a rigid pump base (22); and
- a pumping dome (20), the pumping dome (20) comprising a mount ring (30) and a resilient, flexible dome member (32), the mount ring (30) and the dome member (32) being permanently bonded to each other, and wherein the mount ring (30) and the pump base (22) are configured to provide a releasable connection for retaining the pumping dome (20) to the base (22).
2. The diaphragm pump (12) of claim 1 wherein the dome member (32) is made from thermoplastic elastomer material.
3. The diaphragm pump (12) of claim 1 wherein the pumping dome (20) is a bi-injected construction with the dome member (32) overmolded onto the mount ring (30).
4. The diaphragm pump (12) of claim 1 wherein the dome member has a convex outer surface (34) and a concave inner surface (36) with the dome member (32) in an un-compressed condition.
5. The diaphragm pump (12) of claim 4 wherein the inner and outer surfaces (34,36) are semispherical in shape.
6. The diaphragm pump (12) of claim 5 wherein the pump base (22) comprises a pump chamber (42) defined by a concave surface (44).
7. The diaphragm pump (12) of claim 6 wherein the concave surface (44) of the pump base (22) is semispherical in shape.
8. The diaphragm pump (12) of claim 7 wherein the concave surface (44) of the pump base (22) mirrors the geometry of the dome member (32) when the dome member (32) is inverted into a fully compressed condition so that the inner surface (36) of the dome member (32) conforms to the concave surface (44) of the pump base (22).
9. The diaphragm pump (12) of claim 1 further comprising an inlet valve (24) in the form of a one-piece component that is snap-fit into the pump base (22).
10. The diaphragm pump (12) of claim 1 further comprising an outlet valve cartridge (26) comprising a valve base (120) configured to releasably mount the outlet valve cartridge (26) to the pump base (22), a resilient, flexible outlet valve (122), and a retaining ring (124) for retaining the valve (122) to the base (120).
11. The diaphragm pump (12) of claim 10 wherein the valve base (120) further includes a disk-shaped stop portion (136) that engages the outlet valve (122) to prevent the outlet valve (122) from opening in response to a negative pressure differential across the outlet valve (122) such as will occur when the pressure inside the pump (12) is lower than the atmospheric pressure outside of the pump (12).
12. The diaphragm pump (12) of claim 11 wherein the outlet valve (122) includes a peripheral mount portion (150), a flexible, resilient head portion (152) having an orifice defined by at least one slit (154), and a flexible, resilient intermediate portion (156) that connects the peripheral mount portion (150) to the head (152), the head (152) being movable between a closed position wherein fluent product cannot flow through the outlet valve (122) and an open position wherein fluent product can flow through the outlet valve (122).
13. The diaphragm pump (12) of claim 1 further comprising an inlet valve (24) and an outlet valve (122), and wherein the inlet valve (24), the outlet valve (122), and the pumping dome (20) are all snap-fit connected to the pump base (22).
14. The diaphragm pump (12) of claim 1 wherein the mount ring (30) and the pump base (22) are configured to provide a snap-fit connection for retaining the pumping dome (20) to the base.
15. A diaphragm pump (12) for a fluent product dispensing package (10), the diaphragm pump (12) comprising:
- a rigid pump base (22);
- a pumping dome (20); and
- an outlet valve cartridge (26) comprising a valve base (120) configured to releasably mount the outlet valve cartridge (26) to the pump base (22), a resilient, flexible outlet valve (122), and a retaining ring (124) for retaining the outlet valve (122) to the valve base (120).
16-30. (canceled)
Type: Application
Filed: Dec 3, 2013
Publication Date: Sep 17, 2015
Applicant: APTARGROUP, INC. (Crystal Lake, IL)
Inventors: Jason D. Hatton (Essexville, MI), Franz Lenz (Hinterschmiding), Fabrizio Camplone (Pescara), Darcy J. Wright (Bay City, MI), Andrew Brunner (Lincolnton, NC), James W. Hammond (North Prarie, WI), David Johnson (Colgate, WI), Sarah De La Mare (Bavaria)
Application Number: 14/434,675