US20150251841A1 - Pumps with container vents - Google Patents
Pumps with container vents Download PDFInfo
- Publication number
- US20150251841A1 US20150251841A1 US14/718,668 US201514718668A US2015251841A1 US 20150251841 A1 US20150251841 A1 US 20150251841A1 US 201514718668 A US201514718668 A US 201514718668A US 2015251841 A1 US2015251841 A1 US 2015251841A1
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- US
- United States
- Prior art keywords
- container
- liquid
- pump
- air
- refill unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/38—Details of the container body
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K5/00—Holders or dispensers for soap, toothpaste, or the like
- A47K5/14—Foam or lather making devices
-
- 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
- B05B11/0037—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
- B05B11/00442—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 the means being actuated by the difference between the atmospheric pressure and the pressure inside the container
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- 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
- B05B11/1001—Piston pumps
- B05B11/1015—Piston pumps 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
- B05B11/1087—Combination of liquid and air pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K5/00—Holders or dispensers for soap, toothpaste, or the like
- A47K5/06—Dispensers for soap
- A47K5/12—Dispensers for soap for liquid or pasty soap
- A47K5/1217—Electrical control means for the dispensing mechanism
Abstract
Exemplary embodiments of pumps, refill units and dispensers are disclosed herein. Some embodiments include a container for holding a fluid and a pump housing secured to the container. The pump housing includes an annular collar for securing the pump housing to the container. The pump housing includes an air chamber and a vent valve located at least partially within the air chamber. One or more air passageways are provided in the collar for providing air to the air chamber. A compressible liquid pump chamber is also located in the housing. The exemplary embodiment includes a liquid inlet valve for allowing liquid to flow from the container into the compressible pump chamber; and a liquid outlet valve located downstream of the pump chamber.
Description
- This application claims priority to and the benefits of U.S. application Ser. No. 13/747,909, filed Jan. 23, 2013, titled PUMPS WITH CONTAINER VENTS, which application is incorporated herein by reference in its entirety.
- The present invention relates generally to pumps, refill units for dispensers, and dispensers, and more particularly to pumps, refill units and dispensers that have a non-collapsible container that requires venting.
- Liquid dispenser systems, such as liquid soap and sanitizer dispensers, provide a user with a predetermined amount of liquid upon actuation of the dispenser. In addition, it is sometimes desirable to dispense the liquid in the form of foam by, for example, injecting air into the liquid to create a foamy mixture of liquid and air bubbles. Many dispensers are refillable with refill units that comprise a pump (or a pump and an air compressor) and a container. Many of the refill units currently on the market are inverted. In an inverted refill unit, the pump is located under the container when installed in the dispenser and the containers are often “collapsible” containers. That is, as liquid is pumped out of the container, a vacuum is created in the container and the vacuum pressure collapses the container because air does not flow into the container to replace the liquid. Providing a vent in the bottom of the container subjects the container to potential leakage problems.
- Exemplary embodiments of pumps, refill units and dispensers are disclosed herein. Some embodiments include a container for holding a fluid and a pump housing secured to the container. The pump housing includes an annular collar for securing the pump housing to the container. The pump housing also includes an air chamber and a vent valve located at least partially within the air chamber. One or more air passageways are provided in the collar for providing air to the air chamber. A compressible liquid pump chamber is also located in the housing. The exemplary embodiment includes a liquid inlet valve for allowing liquid to flow from the container into the compressible pump chamber and a liquid outlet valve located downstream of the pump chamber.
- Another exemplary refill unit includes a container for holding a fluid and a pump housing secure to the container. The pump housing has an annular collar for securing the pump housing to the container. A seat member is located at least partially within the annular collar. An air chamber is located within the pump housing below the seat member. One or more air passageways are in the collar for providing air to the air chamber. A vent valve is secured to the seat member for controlling the flow of air from the air chamber into the container. A compressible liquid pump chamber is also located in the housing. A liquid inlet valve is secured to the seat member for allowing liquid to flow from the container into the compressible pump chamber, and a liquid outlet valve is located downstream of the pump chamber.
- Another exemplary refill unit includes a container for holding a liquid. A housing is secured to the container. The housing includes an opening with a sleeve located in the opening. A piston is provided that is movable within the sleeve. The piston includes a sealing member. The housing includes first aperture through a wall of the opening. The first aperture places an area between the sleeve and the opening in fluid communication with the interior of the container. A second aperture through a wall of the sleeve is provided. The second aperture is located so that the second aperture is closed off by the sealing member when the piston is in a first position. When the piston is in a second position, the second aperture is in fluid communication with the atmosphere.
- Another exemplary refill unit includes a container and a pump housing secured to the container. The pump housing includes a substantially cylindrical valve cavity and a substantially cylindrical pump cavity. A sleeve is located at least partially within the pump cavity. An aperture places the valve cavity in fluid communication with the pump cavity. A piston is provided, and the piston is movable horizontally within the sleeve. An inlet valve and an outlet valve are stacked on each other and are offset from the neck of the container.
- Exemplary pumps are also disclosed herein, and the exemplary embodiments of refill units described above include the exemplary embodiments of the pumps. Similarly, the above described refill units may be used in dispensers.
- These and other features and advantages of the present invention will become better understood with regard to the following description and accompanying drawings in which:
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FIG. 1 is a cross-section of an exemplary foam dispenser having a refill unit with a non-collapsible container; -
FIG. 2 is a cross-section of an exemplary refill unit with a pump and a container vent; -
FIG. 3 is a cross-section of an exemplary refill unit with a pump having a simplified inlet and outlet valve and a container vent; and -
FIG. 4 illustrates another cross-section of an exemplary refill unit with a pump having a simplified inlet and outlet valve and a container vent. -
FIG. 1 illustrates an exemplary embodiment of afoam dispenser 100. The cross-section ofFIG. 1 is taken through thehousing 102 to show thefoam pump 120 andcontainer 116.Foam dispenser 100 includes adisposable refill unit 110. Thedisposable refill unit 110 includes a non-collapsiblecontainer 116 connected tofoam pump 120. Thefoam dispenser 100 may be a wall-mounted system, a counter-mounted system, an un-mounted portable system movable from place to place or any other kind of foam dispenser system. Some of the exemplary embodiments described herein have foam pumps; that is, they contain a liquid pump and an air compressor. However, the inventive venting system described herein works equally well with a liquid pump that does not include an air compressor. - The
container 116 forms a liquid reservoir that contains a supply of a foamable liquid within thedisposable refill unit 110. In various embodiments, the contained liquid could be for example a soap, a sanitizer, a cleanser, a disinfectant or some other liquid that may be foamable or not foamable (in the case of a liquid only pump). In the exemplarydisposable refill unit 110, thecontainer 116 is a non-collapsible container and can be made of thin plastic or like material. In other embodiments, thecontainer 116 may be formed by a rigid housing member, or have any other suitable configuration for containing the foamable liquid without leaking Thecontainer 116 may advantageously be refillable, replaceable or both refillable and replaceable. - In the event the liquid stored in the
container 116 of the installeddisposable refill unit 110 runs out, or the installedrefill unit 110 otherwise has a failure, the installedrefill unit 110 may be removed from thefoam dispenser 100. The empty or faileddisposable refill unit 110 may then be replaced with a newdisposable refill unit 110. - In one embodiment, the
housing 102 of thefoam dispenser 100 only extends part way around thecontainer 116 thereby exposing at least a portion of thecontainer 116. In such an embodiment, having a container that does not collapse as liquid is pumped out is aesthetically pleasing. Thehousing 102 of thefoam dispenser 100 contains one ormore actuating members 104 to activate thepump 120. As used herein, actuator or actuating members or mechanism includes one or more parts that cause thedispenser 100 to move liquid, air or foam.Actuator 104 is generically illustrated because there are many different kinds of pump actuators which may be employed in thefoam dispenser 100. The actuator of thefoam dispenser 100 may be any type of actuator such as, for example, a manual lever, a manual pull bar, a manual push bar, a manual rotatable crank, an electrically-activated actuator or other means for actuating thefoam pump 120 which includes aliquid pump portion 124 andair compressor portion 122. Electronic actuators may additionally include a sensor (not shown) to provide for a hands-free dispenser system with touchless operation. In one embodiment,actuator 104 is connected tohousing 102 by ahinge member 106. Various intermediate linkages, such as forexample linkage 105, connect theactuator member 104 to thefoam pump 120 within thesystem housing 102. In one embodiment,linkage 105 has asocket 107 that snaps onto a ball 245 (FIG. 2 ) at the proximate end ofpiston 240. Anaperture 115 inbottom plate 103 ofhousing 102 allows foam dispensed from thenozzle 125 offoam pump 120 to be dispensed to a user. -
FIG. 2 is a cross-sectional view of an exemplary embodiment of arefill unit 200 suitable for use in foam dispensers.Refill unit 200 includes anon-collapsible container 221 for holding a foamable liquid connected to afoam pump 201.Foam pump 201 includes ahousing 202.Housing 202 receivesseat member 216.Seat member 216 includes anannular projection 218. A neck of acontainer 221 is received within anannular groove 222 formed betweenannular projection 218 andhousing 202.Housing 202 may be connected to thecontainer 221 by any means such as, for example, a snap-fit connection, a threaded connection, a welded connection, an adhesive connection or the like. -
Seat member 216 includes one or moreliquid inlet apertures 224 located therethrough. In addition,seat member 216 includes an inlet valve retaining aperture and one-way inlet valve 226 is secured toseat member 216 therethrough. One-wayliquid inlet valve 226 may be any type of one-way valve such as, for example, a ball and spring valve, a poppet valve, a flapper valve, an umbrella valve, a slit valve, a mushroom valve, a duck-bill valve or the like. - In addition,
seat member 216 includes anair inlet aperture 292 and one-wayair inlet valve 294. One-wayair inlet valve 294 includes one or moreair inlet apertures 296.Housing 202 includes anannular projection 299 that engages with a secondannular projection 227 ofseat member 216 to form a liquid passageway on the inside of firstannular projection 299 and secondannular projection 227. Located outside of the firstannular projection 299 and secondannular projection 227 is anair chamber 298.Housing 202 includes one or moresmall channels 290 between the neck of thecontainer 221 andhousing 202 that form an air passageway to provide air from the outside atmosphere to theair chamber 298. - During operation, as liquid is pumped out of
container 221, a vacuum is created inside thecontainer 221. Once the vacuum pressure rises above the cracking pressure of theair inlet valve 294, air fromair chamber 298 is drawn intocontainer 221 to relieve the vacuum pressure. Liquid is prevented from leaking out ofcontainer 221 by one-wayair inlet valve 294. In addition, in one embodiment, thechannels 290 inhousing 202 that form the air passage are very small and if a small amount of liquid entersair chamber 298 it is trapped in theair chamber 298 and will not leak through thechannels 290. In one embodiment,seat member 216 includes a deflector member (not shown) betweenliquid inlet valve 226 andair inlet valve 294 to prevent air from being sucked into the liquid inlet -
Pump housing 202 includes aliquid chamber 204. In oneembodiment liquid chamber 204 is cylindrical. Located at least partially withinliquid chamber 204 is asleeve 232.Housing 202 includes anannular projection 210 at one end of theliquid chamber 204.Sleeve 232 is secured to annular projectingmember 210 bycollar 211.Collar 211 includes anaperture 212. - A
piston 240 includes ashaft 241 that projects throughaperture 212.Piston 240 is slideable in a reciprocating manner withinsleeve 232.Piston 240 includes a piston head having adouble wiper seal 244 located at the distal end. Movement ofpiston 240 causes the volume ofliquid chamber 204 to expand and contract.Double wiper seal 244 may be any type of sealing member such as, for example, an o-ring, a single wiper seal or the like.Housing 202 includes a projectingmember 206 that contacts anend 207 ofpiston 240 to stop movement ofpiston 240 when it reaches the end of its stroke. - In addition,
piston 240 includes a second piston head and sealingmember 242 located at the proximal end ofpiston 240. Second sealingmember 242 engages the inside of theair compressor housing 230. The term “air compressor” may be used interchangeably herein with the term “air pump.” In one embodiment,air compressor housing 230 andsleeve 232 are formed as one piece. Movement ofpiston 240 causesair chamber 243 to expand and contract.Air chamber 243 includes anair outlet 236, which is also an air inlet to mixingchamber 262. In one embodiment,air outlet 236 is integrally formed with bothsleeve 232 andair compressor housing 230. - A
liquid inlet passageway 250 is formed betweensleeve 232 and the wall ofliquid chamber 204. Theliquid inlet passageway 250 may extend entirely aroundsleeve 232 or may be enclosed by one or more rib projections (not shown) that cause liquid ininlet passageway 250 to flow throughpassage 250 andpassage 252 into the interior ofsleeve 232.Outlet passages sleeve 232 and the walls ofliquid chamber 204.Outlet passageway 256 may extend entirely aroundsleeve 232 or may be enclosed by one or more rib projections (not shown) that cause liquid to flow from the interior ofsleeve 232 throughpassageways Passageway 254 andpassageway 250 may be connected to form a common passageway. -
Housing 202 includes anoutlet passage 208. Connected tohousing 202 islower housing 260.Lower housing 260 may be connected tohousing 202 by any means such as, for example, a threaded connection, a snap-fit connection, a welded connection an adhesive connection or the like. In the present exemplary embodiment,lower housing 260 includesannular projection 267 that snaps ontoannular projection 209 ofhousing 202. Locatedproximate outlet passage 208 is aliquid outlet valve 264.Liquid outlet valve 264 includes aslit 266.Slit 266 opens to allow liquid to flow fromliquid chamber 204 into mixingchamber 262. The backing provided by the wall surrounding theliquid outlet 208 prevents theslit 266 from opening when there is pressure in mixingchamber 262 and prevents liquid and/or air from enteringliquid chamber 204 from mixingchamber 262.Liquid outlet valve 264 is retained in place byannular rim 263 onlower housing member 260. While a slit valve is shown and advantageously takes up very little room, other types of liquid outlet valves may be used such as, for example, a ball and spring valve, a flapper valve, a poppet valve, a mushroom valve, a duck-bill valve or the like. -
Lower housing 260 has an interior cavity that forms a mixingchamber 262.Lower housing 260 includes anopening 273 in the wall of mixingchamber 262. Theair outlet 236 ofair chamber 243 is fitted intoopening 273 to allow mixingchamber 262 to be in fluid communication withair chamber 243. Mixingchamber 262 is in fluid communication withliquid chamber 204 throughvalve 264. In addition,lower housing 260 includes anoutlet opening 261 and a lowerannular projection 269.Outlet nozzle 270 fits overlower projection 269 to secureoutlet nozzle 270 tolower housing 260.Outlet nozzle 270 is secured using a press-fit connection, but may be connected by other means such as, for example, a snap-fit connection, an adhesive, a threaded connection or the like.Outlet nozzle 270 includes abase 271, a taperedportion 272 and anoutlet 274. In addition, a foamingmedia 275, such as one or more screens, is included inoutlet nozzle 270. Optionally, a foaming cartridge may be used whereby the foaming cartridge rests onbase 271. In some embodiments,screens 275 are replaced by one or more porous members or baffles. - An exemplary benefit to using
sleeve 232 is that theliquid inlet 224 orliquid inlet valve 226 may be positioned over any portion of thesleeve 232 without affecting the volume ofliquid chamber 204 or reducing the efficiency ofpump 201. Similarly, theliquid outlet 208 and/orliquid outlet valve 264 may be located along any portion of thesleeve 232 without reducing the volume ofliquid chamber 204 or reducing the efficiency ofpump 201. In some embodiments, the liquid inlet and the liquid outlet are off-set from each other. In some embodiments, the liquid outlet is located closer to the front of the dispenser than the liquid inlet when thepump 201 is installed in the foam dispenser. In some embodiments, the liquid inlet and liquid outlet are along a common axis. Thepiston 240 may move along a pump axis that is substantially horizontal. In some embodiments, theliquid inlet valve 226 moves along an axis that is substantially normal to the pump axis. In some embodiments, at least a portion of theliquid inlet valve 226 moves along a substantially vertical axis even though it may collapse both horizontally and vertically. - In addition, although the
pump 201 has been described as being made of selected sub-parts, pump 201, as well as the other embodiments of pumps disclosed herein, may be made from more sub-parts or fewer sub-parts. - During operation, as
piston 240 ofpump 201 moves from a discharged position to a charged position or primed state, liquid flows in throughliquid inlet 224, past one-way inlet valve 226, intoliquid chamber 204, throughpassages sleeve 232, which also forms a portion of theliquid chamber 204. - Movement of
piston 240 from the charged position to the discharged position causes fluid to flow out of the liquid chamber 204 (including the center of the sleeve 232) throughpassages liquid outlet valve 264 and into mixingchamber 262. Simultaneously, the volume ofair chamber 243 is reduced and air flows out ofair outlet 236 into mixingchamber 262. The air and liquid mixture is forced throughopening 261 and throughfoam media 275 to create a rich foam. The rich foam travels through taperedsection 272 where it accelerates due to the reduced volume and exitsfoam pump 201 throughoutlet 274. - The air compressors and liquid pumps described herein may include biasing members to return them to a charged or primed state. In some embodiments, a biasing member in the actuator mechanism returns the air compressor and/or liquid pump to a first state. Still yet, if the air compressor and/or liquid pump are electrically operated, they may be moved to the first state electronically.
- In some embodiments, the
foam pump 201 is replaced with a liquid pump that does not include an air compressor. -
FIG. 3 is a cross-sectional view of an exemplary embodiment of arefill unit 300 suitable for use in a dispensers.Refill unit 300 includes anon-collapsible container 321 for holding a liquid connected to apump 301.Pump 301 includes ahousing 302.Housing 302 includes anannular collar 307 and an interiorannular projection 318 that forms anannular groove 322 for receiving the neck ofcontainer 321.Housing 302 may be connected to thecontainer 321 by any means such as, for example, a snap-fit connection, a threaded connection, a welded connection, an adhesive connection or the like. -
Housing 302 includes abase 309.Base 309 includes aliquid inlet aperture 324 that leads into avalve cavity 325, placing thevalve cavity 325 in fluid communication withcontainer 321.Valve cavity 325 is formed in part bywall 306. Located withinvalve cavity 325 is anannular projection 308 that serves to retainvalve stem 336.Valve stem 336 is part oflower housing 330.Lower housing 330 includes anannular projection 333 to secure to thewall 306 ofhousing 302.Lower housing 330 may be secured tohousing 302 by any means, such as, for example, a snap-fit connection, a threaded connection, an adhesive connection, a welded connection or the like.Lower housing 330 also includes anoutlet 334 for dispensing a fluid.Valve stem 336 supportsinlet valve 342 andoutlet valve 339 which are stacked on top of each other. Located in a wall ofvalve cavity 325, in between theinlet valve 342 and theoutlet valve 339 is anaperture 305.Aperture 305 places thevalve cavity 325 in fluid communication withpump chamber 304.Inlet valve 342 andoutlet valve 339 are one-way valves and allow liquid to pass in one direction. The valves are simple wiper valves and are interchangeable with each other. -
Pump housing 302 includes apump chamber 304. In oneembodiment pump chamber 304 is cylindrical. Located at least partially withinpump chamber 304 is asleeve 332.Housing 302 includes anannular projection 310 at one end of thepump chamber 304.Sleeve 332 is secured to annular projectingmember 310 bycollar 311. The connection may be any type of connection, such as, for example, a snap-fit connection, a threaded connection, an adhesive connection, a welded connection or the like.Collar 311 includes anaperture 312. - A
piston 340 includes ashaft 341 that projects throughaperture 312.Piston 340 is slideable in a reciprocating manner withinsleeve 332.Piston 340 includes a piston head having adouble wiper seal 344 located at the distal end. Movement ofpiston 340 causes the volume ofpump chamber 304 to expand and contract.Double wiper seal 344 may be any type of sealing member such as, for example, an o-ring, a single wiper seal or the like. -
Sleeve 332 includes anaperture 392.Aperture 392 places the area between thesleeve 332 and thehousing 302 in fluid communication with the atmosphere when the liquid piston is moved forward as illustrated inFIG. 3 . When thepiston 340 moves outward, pistondouble wiper seal 344 closes offaperture 392 andseals aperture 392 from the atmosphere. Located aroundsleeve 332 is a sealingmember 390. Sealingmember 390 seals the area betweensleeve 332 andhousing 302 to prevent liquid from passing from thepump chamber 304 into the area that is periodically open to the atmosphere when the pistondouble wiper seal 344 is moved off ofaperture 392. -
Base 309 ofhousing 302 includes anaperture 394, which may include anannular projection 395. Avent tube 396 is inserted intoaperture 394 andprojection 395. The top 397 of thevent tube 396 is located proximate the top 323 ofcontainer 321 allowing the air to vent the container without fluid traveling down thevent tube 396 into the area between thesleeve 332 andhousing 302. In one embodiment,piston 340 is moved outward to seal offaperture 392 during shipping. - In addition, although the
pump 301 has been described as being made of selected sub-parts, pump 301, as well as the other embodiments of pumps disclosed herein, may be made from more sub-parts or fewer sub-parts. - During operation, as
piston 340 ofpump 301 moves from a discharged position (as illustrated inFIG. 3 ) to a charged position or primed state, liquid flows intovalve cavity 325 throughliquid inlet aperture 324, past one-wayliquid inlet valve 342, throughaperture 305 and intopump chamber 304 to charge thepump 301 or place thepump 301 in the charged position. - Movement of
piston 340 from the charged position to the discharged position causes fluid to flow out of thepump chamber 304 back intovalve chamber 325. One-way liquidinlet check valve 342 prevents liquid from flowing back intocontainer 321 and accordingly, the liquid flows past one-wayliquid outlet valve 339 intooutlet nozzle 334 where it is dispensed to a user. - Pumping liquid out of
container 321 causes a vacuum to develop incontainer 321. When thepiston 340 is moved toward the discharged position anddouble wiper seal 344 moves off ofair inlet aperture 394, the vacuum pressure draws in air from the atmosphere up thevent tube 396 into thecontainer 321. - In some embodiments, pump 301 is used without the
vent tube 396,aperture 394 and sealingmember 390 and used with a collapsible container instead of a non-collapsible container. -
FIG. 4 is another exemplary embodiment of arefill unit 400.Pump 401 is substantially similar to pump 301. The liquid pumping portion is so similar, the components are not renumbered with respect toFIG. 4 , and only the venting components are described with respect toFIG. 4 .Pump 401 includes a ventingaperture 492 through a wall ofsleeve 432. Anaperture 494 is throughbase 406 ofhousing 402. An annular projectingmember 495 projects up frombase 406 aroundaperture 494. Additionalair inlet apertures 494A may be included aroundaperture 494 ifaperture 494 is used solely to anchor one-wayair inlet valve 496 tobase 406. Optionally, air may flow through grooves (not shown) in the base of one-wayair inlet valve 496 and throughaperture 494. A sealingmember 490, such as, for example, an o-ring provide an air passage betweensleeve 432 andbase 402 for air to flow to one-wayair inlet valve 496. One-wayair inlet valve 496 allows air to flow intocontainer 421 once sufficient vacuum pressure builds withincontainer 421 to overcome the cracking pressure ofvalve 496. Operation ofpump 401 and the venting system is similar to the operation of the prior embodiments and will not be re-discussed herein. - While the present invention has been illustrated by the description of embodiments thereof and while the embodiments have been described in considerable detail, it is not the intention of the applicants to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled in the art. Moreover, elements described with one embodiment may be readily adapted for use with other embodiments. Therefore, the invention, in its broader aspects, is not limited to the specific details, the representative apparatus and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of the applicants' general inventive concept.
Claims (22)
1. A refill unit comprising:
an inverted container for holding a fluid;
the inverted container having a neck portion located on the bottom of the inverted container;
a pump housing secured to the neck of the inverted container to pump liquid;
the pump housing having an annular collar for securing to the neck of the inverted container;
an air chamber located within the pump housing;
a vent valve located at least partially within the air chamber;
one or more air passageways in the collar for providing air to the air chamber;
a compressible liquid pump chamber located in the housing;
a liquid inlet valve for allowing liquid to flow from the container into the compressible pump chamber; and
a liquid outlet valve located downstream of the pump chamber.
2. The refill unit of claim 1 wherein the vent valve is located adjacent the liquid inlet valve.
3. The refill unit of claim 1 further comprising a seat member, wherein the seat member comprises an air passage and a liquid passage, and the vent valve is located proximate the air passage and the liquid inlet valve is located proximate the liquid passage.
4. The refill unit of claim 3 wherein the neck of the inverted container is in contact with the seat member.
5. The refill unit of claim 3 wherein the seat member further comprises a deflector member for deflecting air entering the container away from the liquid passage in the seat member.
6. The refill unit of claim 1 further comprising a compressible air chamber and a mixing chamber, wherein the mixing chamber has an air inlet in fluid communication with the compressible air chamber and a liquid inlet downstream of the liquid outlet valve and in fluid communication with the liquid pump chamber.
7. The refill unit of claim 1 further comprising a liquid contained in the inverted container.
8. The refill unit of claim 1 wherein the air passage is located between a wall of the collar and a wall of the inverted container.
9. A refill unit comprising:
a container for holding a fluid;
a pump housing secured to the container;
the pump housing having an annular collar for securing the pump to the container;
a seat member located at least partially within the annular collar;
an air chamber located within the pump housing below the seat member;
one or more air passageways in the collar for providing air to the air chamber;
a vent valve secured to the seat member for controlling the flow of air from the air chamber into the container;
a compressible liquid pump chamber located in the housing;
a liquid inlet valve secured to the seat member for allowing liquid to flow from the container into the compressible pump chamber; and
a liquid outlet valve located downstream of the pump chamber.
10. The refill unit of claim 9 wherein the air passage is located between a wall of the collar and a wall of the container.
11. The refill unit of claim 9 wherein the container is in contact with the seat member.
12. The refill unit of claim 9 wherein the seat member further comprises a deflector member for deflecting air entering the container away from the liquid passage in the seat member.
13. The refill unit of claim 9 wherein the seat member is a single unitary piece.
14. A refill unit for a dispenser comprising:
a container for holding a liquid;
a housing secured to the container;
the housing having a opening;
a sleeve inserted in the opening;
a piston movable within the sleeve;
the piston including a sealing member;
a first aperture through a wall of the opening;
the first aperture placing an area between the sleeve and the opening in fluid communication with the interior of the container;
a second aperture through a wall of the sleeve, the aperture located so that the second aperture is closed off by the sealing member when the piston is in a first position; and
wherein when the piston is in a second position, the second aperture is in fluid communication with the atmosphere.
15. The refill unit of claim 14 further comprising a one-way valve located proximate the first aperture to allow air to enter the container.
16. The refill unit of claim 15 further comprising a vent tube in fluid communication with the first aperture and extending up into the container to a position that is above the top of a fluid fill level.
17. The refill unit of claim 14 further comprising one or more sealing members that create an air passage between the sleeve and the opening.
18. The refill unit of claim 15 further comprising a third aperture, the third aperture located in the housing between a liquid inlet valve and a liquid outlet valve, the third aperture placing a liquid chamber located at least partially within the sleeve in fluid communication with the interior of the container.
19. The refill unit of claim 18 wherein the inlet valve and the outlet valve are stacked on top of each another.
20. The refill unit of claim 19 further comprising an outlet nozzle, wherein the outlet nozzle is secured in a fourth aperture of the housing and the outlet nozzle includes a projecting member that retains the stacked inlet valve and the outlet valve.
21. The refill unit of claim 14 wherein the sleeve is located in a substantially horizontal orientation and the piston reciprocates back and forth in a substantially horizontal direction.
22. A refill unit comprising:
a container for holding a liquid;
a pump housing secured to the container;
the pump housing having a substantially cylindrical valve cavity and a substantially cylindrical pump cavity;
a sleeve located at least partially within the pump cavity;
an aperture between the valve cavity and the pump cavity;
a piston movable horizontally within the sleeve; and
an inlet valve and an outlet valve stacked on each another,
wherein the inlet and outlet valve are offset from the neck of the container.
Priority Applications (1)
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US13/747,909 US9038862B2 (en) | 2013-01-23 | 2013-01-23 | Pumps with container vents |
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EP (1) | EP2948255B1 (en) |
JP (1) | JP2016506782A (en) |
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AU (1) | AU2014209540B2 (en) |
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AU2014209540B2 (en) | 2018-07-05 |
EP2948255B1 (en) | 2019-01-16 |
CA2898269A1 (en) | 2014-07-31 |
BR112015017250A2 (en) | 2017-07-11 |
US20140203047A1 (en) | 2014-07-24 |
CA2898269C (en) | 2021-08-10 |
AU2014209540A1 (en) | 2015-09-10 |
US9038862B2 (en) | 2015-05-26 |
CN104955583A (en) | 2015-09-30 |
TW201441142A (en) | 2014-11-01 |
WO2014116632A1 (en) | 2014-07-31 |
EP2948255A1 (en) | 2015-12-02 |
MX2015009481A (en) | 2015-11-16 |
JP2016506782A (en) | 2016-03-07 |
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