Abstract: The invention relates to a dispensing device for dispensing a preferably cosmetic liquid, comprising an elastic or flexible pump section. The aim of the invention is to provide a dispensing device having a compact and simple structure, that is easy to use and operate such that said dispensing direction is at least substantially counter to the direction of actuation and/or it extends at least substantially vertically in the upward direction. Alternatively or additionally, a widening receiving area for the dispensed liquid adjoins the outlet such that said liquid can be removed or extracted manually. Said receiving area is preferably shell-shaped and open towards the top.

Abstract: A pump for a bottle is disclosed. The pump comprises a lid for being assembled to a mouth of the bottle, a shell settled inside the lid, a drawing tube connected to a lower end of the shell with a one-way valve settled therebetween so that contents in the bottle can be drawn into the shell through the drawing tube and retained from reversely flowing back to the bottle, a pressing head for controlling a piston tube to axially shift in the lid and the shell, an elastic member settled in the shell so as to axially deform and resile in responding to the axially shifting piston tube so that the contents in the bottle can enter the shell through the one-way valve and be extruded into the piston tube through a radial hole so as to be expelled at an outlet of the pressing head.

Abstract: A device for dispensing a flowable material is disclosed. The device includes a container holding the flowable material therein and a pumping assembly attached to the container. The pumping assembly includes a pump and a placard portion configured for displaying viewable information thereon associated with the flowable material.

Abstract: An apparatus for extracting the contents from a refill pouch comprises a holding member for holding the pouch with its extraction port located downward, and a pump attached to the extraction port of the pouch. The pump has a pump body defining a housing space having an inlet opening and an outlet opening, an inlet-side valve which communicates with the extraction port to open and close the inlet opening so that the contents can be introduced into the housing space from the pouch, and an outlet-side valve to open and close the outlet opening so that the contents in the housing space can be discharged through a nozzle that communicates with the outlet-side valve. In one embodiment, the pump has two spindles disposed in laterally spaced-apart relation at opposite sides of the pump body and that are manually movable towards each other in a sidewise direction of the pump body to pressurize the housing space so that the contents can be extracted through the nozzle.

Abstract: A pump is arranged to be mounted on a product storage and dispensing container. It includes a variable-volume pumping chamber and a dip tube having a first end able to be inserted inside the container where it picks up product and a product-dispensing second end at the exit from the pumping chamber. The dip tube can be produced by extrusion and typically has two valves and at least one elastically deformable portion running between the valves.

Abstract: A fluid dispenser member (1) for associating with a fluid reservoir (2) so as to form a fluid dispenser, said member (1) including a body (11) via which the dispenser member is mounted in stationary manner on a mounting part (3), the body (11) defining a housing (113) for receiving another component element (13) of the dispenser member, the member being characterized in that the housing (113) includes a movable portion (115) that is displaceable from an initial configuration in which the housing is open, to a final configuration in which the housing is closed on the component element (13) while the dispenser member (1) is being mounted in the mounting part (3).

Abstract: The invention relates to a dispenser (1) for discharging liquid to pasty materials. The dispenser comprises a pump head (2) and a pump chamber (8) which is embodied therein and is provided with a pump chamber wall (20), an inlet valve (26) and a discharge valve (11). The dispenser (1) further comprises a reservoir (3) which contains a storage bag (4) whose volume can be reduced so as to empty the same. In order to obtain an advantageous design regarding vibrations or sudden pressure increases in the material, the pump chamber wall (20) of the pump head (2) is configured in a flexible manner.

Abstract: A dispenser device for liquors, pastes or foams and the like fluid materials comprises a reservoir (10) for fluid material, an outlet (12) for said reservoir and an outlet passage (18) to connect the reservoir outlet with an outlet orifice (19) of the device. Means (21) defining a post-expansion chamber are provided between the reservoir outlet and said outlet orifice to prevent material from escaping from the outlet after use. The post-expansion chamber is configured to increase in size once actuation of the device has stopped.

Abstract: There is provided a backflow preventing mouth plug comprising an elastic membrane element having a discharge opening for discharging fluid and mounted to a mouth part of a container and a plug member disposed in the elastic membrane element to prevent unintentional outflow of the fluid. The plug member has a spherical seal surface with which the elastic membrane element elastically and closely contacts. At least one thick wall portion and at least one thin wall portion are alternately formed around the discharge opening of the elastic membrane element in a circumferential direction thereof.

Abstract: A pump engine or unit for pump-action fluid dispenser has a fluid storage chamber (16), a final fluid outlet nozzle and a manually actuated pump for delivering fluid from the fluid storage chamber to the outlet under pressure. The engine has a body comprising two parts (48, 50) which define between them the fluid storage chamber and least one chamber (64) of the pump. The fluid storage chamber is defined between opposing wall portions (52, 54) of the two parts of the body and at least one of the opposing wall portions (54) is flexible and is configured to conform closely to the contour of the other of the opposing wall portions (52), at least when the fluid storage chamber is empty.

Abstract: A plastic container includes a squeezable bottle providing a lower main liquid reservoir for storing a cleaning solution, an upper dispensing receptacle for measuring and dispensing a measured quantity of liquid, and a transfer duct communicating a lower portion of the main liquid reservoir with an upper portion of the dispensing receptacle for transferring liquid from the main liquid reservoir to the upper dispensing receptacle. After the main liquid reservoir is filled through an opening at the base of the dispensing receptacle, the opening is closed with an insert equipped with a check valve. This same container is adapted to a single flow or double-flow proportioning container by providing a drop tube which opens the check valve and permits liquid to pass from the main reservoir through a check valve housed in a cap assembly, thence through a metering tip to a delivery tube which is in fluid communication with a proportioning device.

Abstract: A method and apparatus for dispensing a post-mix beverage in which a disposable concentrate unit 15 and a disposable pump unit 17 are housed in an upper refrigerated cabinet area 20 of a beverage dispenser 12. The pump unit 17 is operable to dispense metered volumes of concentrate for mixing with a regulated flow of diluent to dispense a required ratiometric mixture thereof.

Abstract: The invention relates to a pump for a liquid product dispenser, which includes a reservoir and interacts with a manually actuatable element provided with an injection orifice. The pump includes a body embodied in the form of a single piece and including a seat which covers the reservoir and is provided with an intake orifice and a flap, which is mounted on the seat by means of a joint associated with an elastic return means which enables the flap to be reversibly tilted towards the seat, by pressing on the actuating element, in such way that the injection orifice is opened and the intake orifice is simultaneously closed.

Abstract: A liquid dispensing device includes a storage container and dome pump mechanism attached thereto for metered dispensing. A one-way valve is employed to pull liquid from the storage container into the dome for metering. An exit passageway serves as an output valve. Each time the dome pump housing is depressed, a substantially equal volume of fluid is dispensed from the container. To prevent accidental dispensing, the one-way valve in the dome pump remains normally open and unsealed to allow backflow of liquid back into the storage container pouch when pressure is placed on the dome. The user squeezes the dome and base plate together to seal the one-way valve to urge liquid out through the exit port for actual dispensing. The dome pump is integrally formed with a top portion of the exit pathway. Optionally, the base plate and bottom portion of the exit pathway are also integrally formed to facilitate manufacture and reduce costs of the pump while improving performance thereof.

Abstract: A liquid dispensing device includes a storage container and dome pump mechanism attached thereto for metered dispensing. A one-way valve is employed to pull liquid from the storage container into the dome for metering. An exit passageway serves as an output valve. Each time the dome pump housing is depressed, a substantially equal volume of fluid is dispensed from the container. To prevent accidental dispensing, the one-way valve in the dome pump remains normally open and unsealed to allow backflow of liquid back into the storage container pouch when pressure is placed on the dome. The user squeezes the dome and base plate together to seal the one-way valve to urge liquid out through the exit port for actual dispensing. Also, interior pouch force creates blackflow through the exit port back into the containment chamber to further prevent leakage.

Abstract: A container having a body surrounding a cavity and with lotion within the cavity, a mouth formed in the body and communicating with the cavity, and a dispenser located in the mouth. The dispenser comprises a pump base at a bottom end of the dispenser, a foraminous member located in an upper end of the dispenser, a first hollow piston extending from the base and a second hollow piston mounted on the foraminous member and disposed coaxially with respect to the first hollow piston, and a bellows surrounding the second piston and operative to urge away from the first piston upon release of an external actuating force on the foraminous member.

Abstract: A dispenser for dispensing fluid, such as a perfume, the dispenser comprising: a fluid receptacle (1); an actuatable dispenser member (O) that is suitable for taking and for dispensing doses of fluid; and a supply tube (24) connecting the receptacle to the dispenser member; the dispenser being characterized in that: the dispenser member includes a deformable, flexible envelope (6), the dispenser member being actuatable by deforming the envelope; and, in use, the dispenser member is movable relative to the receptacle.

Abstract: A bellows-type pump includes a body portion with an inlet and an outlet. A bellows member is secured to the body portion and provides a dosage volume that communicates with both the inlet and outlet. Compressing the bellows member causes a sealing web thereof to contact the inlet and seal the same against the flow of product from within the dosage volume. The sealing web does not cover the outlet upon compression of the bellows member and, thus, product is dispensed through the outlet upon such compression. Expansion of the bellows member draws product in through the inlet.

Abstract: A hanging liquid dispenser is provided that includes a pump and valving for delivering the fluid material when the dispenser is operated by the user in a controlled fashion. The hanging dispenser includes a main body that serves as a fluid reservoir and has an eyelet formed therein which is suitable for use in hanging the dispenser from a suitable support. In addition to including the ability to hang, the dispenser preferably includes a pump for metered dosing of the fluid within the dispenser wherein operation of the pump delivers a controlled volume of the fluid as desired by the user.

Abstract: The present invention relates to a pumping device for dispensing a media. More specifically the present invention relates to a pump dispenser consisting of a pump cap and a receptacle, said pump cap being particular suitable for dispensing powder or fiber.

Abstract: A fluid dispenser is provided that includes a multiple chamber fluid storage region, each having a dispensing pump of its own such that the dispenser can dispense the fluids from within the multiple fluid storage regions. Further, the multiple fluid storage regions may each contain the same or different liquids. The dispensing pumps include a metering housing, which when depressed, generate a one-way flow from the interior fluid storage region of the container that serves to fill the predetermined volume of the chamber within the metering housing. When the metering housing is depressed a second time a substantially equal volume of each of the fluids is dispensed from the container, while upon release, the metering housings are refilled by drawing fluids from their respective fluid storage regions. The fluids are mixed in the exit port as they are dispensed from the metering pumps.

Abstract: A dispensing device is provided that includes at least two separate reservoirs therein and a dispenser for mixing and delivering a substantially equal metered dose of fluid material from the reservoirs with each dispensing operation. In one example, the present invention relates to a dispenser for mixing and delivering hair colorant that allows the user to dispense a metered dose of the hair colorant components in a manner that measures and mixes those components with each dispensing operation. An optional applicator may be provided for even distribution of the dispensed hair colorant material.

Abstract: The present invention is a fluid dispensing device that includes a flexible and compressible outer housing that defines a bladder-receiving region. An independently deformable bladder, that contains media to be dispensed therein, resides in the bladder-receiving region. Compression of the outer housing exoskeleton causes the inner bladder to collapse and urge liquid, contained therein, to exit through the nozzle dispensing. A pump, which is accessible from the outside of the housing by a user, may be installed in fluid communication with the bladder to assist in dispensing media from the bladder for use.

Abstract: The fluid dispenser includes a storage pouch that defines a storage container with fluid residing therein. The storage container has an exit port. A docking support includes a seat for removably receiving the storage container. The docking support has an input port. The exit port of the storage container is in fluid communication with the input port of the docking support. A conduit is fluidly connected to the input port of the docking support whereby fluid is delivered from the storage container through the docking station and through the conduit and out through the nozzle. A nozzle is preferably attached to the free end of the conduit with a metering pump positioned thereat to control flow of fluid therefrom.

Abstract: The invention relates to a device (1), comprising a valve element (2) and a valve seat (4) associated therewith, for dispensing a preferably cosmetic fluid. The invention also relates to the use of thermoplastic silicone for producing a valve element. The aim of the invention is to produce the aforementioned device in a simple and inexpensive manner. For this purpose, the valve element (2) is produced from a thermoplastic silicone. The valve element is especially injection-molded from thermoplastic silicone at a processing temperature of from 140° C. to 250° C.

Abstract: A fluid container is provided that includes at least two separate reservoirs therein and a metering pump device for delivering a substantially equal metered dose of fluid material from one of the reservoirs to the other reservoir with each dispensing operation. In one example, a beverage container is provided that allows the user to introduce a metered dose of ingredients or additives from a separate reservoir to the beverage contained therein prior to or while drinking. In another example, a cap is provided that can be affixed to a beverage container, wherein the cap contains ingredients or additives and a metered dispensing system. The container or cap allows the user to add or adjust the levels of flavorings, supplements, purifying agents, or other ingredients prior to or during drinking.

Abstract: The present invention is a fluid dispensing device that includes a reusable outer housing that defines a bladder-receiving region. An independently deformable bladder, that contains media to be dispensed therein, resides in the bladder-receiving region. A pump, which is accessible from the outside of the housing by a user, is installed in fluid communication with the bladder to dispense media from the bladder for use. When media is depleted from the bladder, the bladder and pump arrangement can be easily replaced with a full bladder and new pump for installation into the reusable outer housing.

Abstract: An atomizing fluid dispenser for delivering, via a spray nozzle, a substantially equal metered dose of fluid material for each dispensing operation is disclosed. The fluid dispensing device includes a container with an interior fluid storage region therein. A metering housing, when depressed, generates a one-way flow from the interior fluid storage region of the container that serves to fill the predetermined volume of the chamber within the metering housing. When the metering housing is depressed a second time a substantially equal volume of fluid is dispensed from the container, while upon release, the metering housing is refilled by drawing fluid from the fluid storage region. A spray nozzle or atomizer is attached to the exit port of the dispensing device so that the liquid is delivered in metered fashion in spray form.

Abstract: A siphon device facilitates the removal of liquids from botanical containers, without requiring the removal, destruction, or alteration of botanical materials that may be contained therein. The siphon device comprises a first segment of tubing, a second segment of tubing coupled to the first segment of tubing, and a bulb coupled to the second segment of tubing. Inlet and outlet openings in the first segment of tubing allow liquids to be drawn into and released out of the siphon device. A first end of the first segment of tubing may be inserted into a botanical container holding liquid, such as a vase, urn, bottle, etc. Squeezing of the bulb forces air out of the bulb. Releasing of the bulb causes liquid to be drawn up through the first end and out of a second end of the first segment of tubing, thereby removing the liquid from the botanical container. The second end may be positioned in a disposal area, such as a sink, bucket, etc., in order to collect the liquid removed from the botanical container.

Abstract: A structure for controlling soap discharging quantity of soap dispensing apparatus includes a connector coupling with a liquid soap container by screwing that has a bottom housed in a sleeve. The sleeve has a pump housing on one side formed by an elastic pressure bulb. The sleeve has a discharge opening on the bottom and houses axially an upper valve and a lower valve that form a valve chamber therebetween. The tubular wall of the sleeve on the pump housing on an upper end of the lower valve has a hole. The tubular wall of the sleeve on the upper end of the upper valve has an upper hole. The upper hole can disperse pressure entering the valve chamber to make outlet of the valve chamber smaller thereby to reduce output quantity of the liquid soap. An action passage of vacuum suction force can also be formed to suck the liquid soap held on the bottom of the soap container into the valve chamber.

Abstract: A beverage dispenser for dispensing a post-mix beverage is characterized by a disposable concentrate beverage unit and a disposable pump unit that are housed in a refrigerated area of the beverage dispenser. The pump unit is operable to dispense metered volumes of concentrate for mixing with a regulated flow of diluent to dispense a required ratiometric mixture thereof.

Abstract: This invention relates to pump-action nozzle devices methods of making the same. The nozzle devices of the invention comprises a body which defines an internal chamber having an inlet through which fluid may be drawn into said chamber and an outlet through which fluid present in the chamber may be expelled from the nozzle. The inlet comprises an inlet valve and the outlet comprises an outlet valve. Fluid is dispensed from the dispenser nozzles by applying pressure to an actuator member that engages and resiliently deforms or displaces a portion of the body of the device that defines the chamber, thereby compressing the chamber and actuating the dispensing of fluid. In preferred embodiments, the actuator provides a rigid actuator surface that an operator can apply a pressure to.

Abstract: Liquid soap dispensers including a vacuum relief valve which comprises an enclosed chamber having an air inlet open to the atmosphere and a liquid inlet in communication with liquid in the reservoir and in which the liquid inlet opens to the chamber at a height below a height at which the air inlet opens to the chamber. The vacuum relief valve permits relief of vacuum from the reservoir without moving parts or valves.

Abstract: An apparatus for storing fluid and dispensing multiple portions of the stored fluid has a container defining a variable-volume storage chamber; a dispensing valve including a valve inlet coupled in fluid communication with the variable-volume storage chamber, and an elastic valve member in fluid communication with the valve inlet and defining a normally-closed valve opening; a manually engageable actuator; and a pump including a compressible member defining a compression chamber coupled in fluid communication with the variable-volume storage chamber. Multiple portions of the stored fluid are hermetically sealed in the variable-volume storage chamber. The actuator is manually engageable and movable between (i) a first position wherein the compression chamber defines a first volume, and (ii) a second position wherein the compression chamber defines a second volume less than the first volume.

Abstract: An apparatus for storing fluid and dispensing multiple portions of a stored fluid therefrom. The apparatus comprises a container defining a variable-volume storage chamber for receiving therein the fluid and a dispensing valve including a valve inlet coupled in fluid communication with the variable volume storage chamber, and a valve member in fluid communication with the valve inlet and defining a normally-closed valve opening. The valve member is responsive to fluid at the valve inlet exceeding a valve opening pressure to move between (i) a normally closed position, and (ii) an open position permitting fluid flow through the valve opening. The dispensing valve defines a dispensing axis defining a direction substantially along which fluid is dispensed from the valve, and further includes an outlet surface over which dispensed fluid flows oriented at an acute angle relative to the dispensing axis for preventing the collection of residual dispensed fluid thereon.

Abstract: The present invention relates to a fluid dispenser member comprising a body (1), a pusher (2) axially displaceable between a rest position and a depressed position, the pusher forming a fluid dispenser orifice (24), and a flexible part (3) connecting the body to the pusher. The part forms return spring means (35) urging the pusher towards the rest position. The part also forms the moving member (38) of an outlet valve. The part also comprises support means (33) engaged with the body, and anchor means (37) engaged with the pusher. The support means are surrounded by the anchor means. The part includes an elastically deformable portion (34) that extends between the support means and the anchor means. The elastically deformable portion (34) constitutes both the return spring means (35) and the outlet valve moving member (38).

Abstract: A liquid metered dispensing squeeze bottle includes: (a.) a squeezable container having an opening for dispensing liquid therefrom at one end and a bottom at the other end; (b.) a nonflexible trap chamber of a predetermined volume, connected to the opening of the container; (c.) a dip tube, and (d.) a one way valve at the bottom of the dip tube.

Abstract: A liquid metered dispensing squeeze bottle includes: (a.) a squeezable container having an opening for dispensing liquid therefrom at one end and a bottom at the other end; (b.) a nonflexible trap chamber of a predetermined volume, connected to the opening of the container; (c.) a dip tube, and (d.) a one way valve at the bottom of the dip tube. There is an inlet leg that freely rotates around the bottom of the dip tube and a drive mechanism, such as a counterweight or a float, to assure that the leg extends into an air pocket when the container is tilted for liquid squeeze dispensing.

Abstract: A liquid dispenser is described and includes a cover connecting to the opening of a container and a main body connecting to the cover. Th e main body includes a chamber in communication with the cover and a liquid outlet for liquid discharge, wherein a liquid output device is arranged in the chamber, a button is arranged on the main body for controlling the action of the liquid output device, a one-way valve is arranged in the liquid output device for adjusting the open/close state of a liquid output passage. The liquid dispenser described is novel in design, simple and compact in construction. The liquid dispenser described can employ the operating principle of a one-way valve so as to realize liquid discharge in any direction.

Abstract: A liquid soap leakage-proof structure for soap dispensing apparatus comprising a pointed end portion which is integrally extended from the bottom end of a liquid soap discharge opening of the liquid soap dispensing apparatus to prevent liquid soap from leaking during storing or transportation. The pointed end portion has an upper end connecting to the liquid soap discharge opening on which a weaker portion is formed so that the pointed end portion can be broken as desired to expose the discharge opening to discharge the liquid soap.

Abstract: An apparatus has a valve body defining a first passageway, a valve seat, and a flow aperture extending through the valve body and coupled in fluid communication with the first passageway. A valve cover of the apparatus is formed of an elastic material and includes a cover base mounted on the valve body and fixedly secured against movement relative thereto, and a valve portion overlying the valve seat. The valve portion defines a predetermined radial thickness and forms an interference fit with the valve seat. The valve portion and the valve seat define a normally closed, axially-extending valve opening therebetween. The valve portion is movable between a normally closed position with the valve portion engaging the valve seat, and an open position with at least a segment of the valve portion spaced away from the valve seat to connect the valve opening in fluid communication with the flow aperture to thereby allow the passage of fluid from the flow aperture through the valve opening.

Abstract: A piston configured to be engaged inside a cylindrical container includes: a sliding member having an upper fluidtight portion and a lower fluidtight portion; and a support member connected to the sliding member and having concentric flexions for urging the sliding member against the inner wall of the cylindrical container. The upper and lower fluidtight portions are each constituted by at least one annular convex bump portion having a thickness which is the greatest at a point where the annular convex bump portion is in contact with the inner wall of the cylinder.

Abstract: A piston adapted to be engaged inside a cylindrical container is constituted by an elastic member and includes: a sliding member having an upper fluidtight portion and a lower fluidtight portion, both of which fluidtightly and slidably contact an inner wall of the cylindrical container; and a support member having an upper concentric flexion and a lower concentric flexion to urge the sliding member against the inner wall of the cylindrical container.

Abstract: A fluid dispensing apparatus includes a fluid reservoir and a dispensing assembly. The dispensing assembly includes a housing and a deformable member that define a metering chamber that is configured to receive a predetermined volume of fluid from the fluid reservoir. The deformable member is deformed from a rest position to an eject position and the deformation causes the volume of the metering chamber to change which results in a change in fluid pressure within the metering chamber. An increase in the fluid pressure within metering chamber causes a predetermined volume of fluid within the metering chamber to be ejected and a decrease in the fluid pressure within the metering chamber causes fluid to be drawn into the metering chamber from the reservoir.

Abstract: A bottle is disclosed that includes a product stored therein. It is configured to be removably engaged with a docking station in an inverted arrangement to be activated by the docking station and heat the product. The bottle may include a pump structure (e.g. in the form of a bellows), or be a squeezable bottle, or be a bowable bottle, or have other pumping features. Structures are provided to prevent drool after use, to help apply the heated product to the skin, and to insure proper heating and dispensing. Also disclosed are combined docking stations and bottles where the bottle is positioned in an inverted manner, and methods for using these devices.

Abstract: An apparatus has a valve body defining a first passageway, a valve seat, and a flow aperture extending through the valve body and coupled in fluid communication with the first passageway. An elastic valve cover includes a valve portion overlying the valve seat, forming an interference fit with the valve seat, and defining an axially-extending valve opening therebetween. The valve portion is movable between a normally closed position with the valve portion engaging the valve seat, and an open position with at least a segment of the valve portion spaced away from the valve seat to allow the passage of fluid from the flow aperture through the valve opening. A hermetically sealed variable-volume storage chamber is connectible in fluid communication with the one-way valve assembly. A pump is coupled between the variable-volume storage chamber and the one-way valve assembly to dispense discrete portions of fluid through the valve assembly.

Abstract: A dispenser has a housing, and a variable-volume storage chamber formed within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed. A piston is mounted within the housing, and a one-way valve is mounted within the housing and coupled in fluid communication with the variable-volume storage chamber.

Abstract: A pump for delivery of gas-liquid mixtures adapted to be connected to a container for a liquid comprising: suction means adapted to be reciprocated between a first rest position and a second position so as to collect the liquid from the container; a mixing chamber in communication with the suction means so that when the suction means are moved from a first position to a second position, the liquid is collected from the container and conveyed into a mixing chamber; elastic means adapted to displace the suction means back in the first position after that the suction means are moved from a first position to a second position. The elastic means define a variable volume gas chamber in communication with the mixing chamber so that, when the suction means are moved from a first position to a second position, the gas is conveyed into the mixing chamber and a gas-liquid mixture is formed in the mixing chamber.

Abstract: A water gun (10) is provided having a storage tank (18), a expandable pressure tank (19) having an elastic bladder (30) encased within an outer shell (29), and a pump (32) for conveying liquid from the storage tank to the expandable pressure tank. The conveyance of liquid into the expandable pressure tank causes the liquid to be pressurized by the biasing force of the elastic bladder. The pressurized liquid is released through a nozzle (21) coupled to the expandable pressure tank by actuation of a trigger (17).

Abstract: The invention provides a pump of type comprising a moving member mounted to move relative to a support, the moving member having a central duct into which the substance to be dispensed penetrates via at least one opening, the support co-operating with the moving member to define a variable volume pump chamber around said central duct, the pump also having a diaphragm having a central portion in the form of a sleeve that is open at its top end and closed at its bottom end, said central duct being inserted in said central portion, the diaphragm being organized in such a manlier as to isolate the opening(s) of the pump chamber when the volume of the pump chamber increases and the substance is sucked into it. The bottom portion of the central portion of the diaphragm presents, at least over a sector of its periphery, a preferred deformation zone.