Abstract: A depress-to-actuate pneumatically-operated double-walled container includes a double-walled contained accommodated in an outer casing, both being secured to a dispenser cap. The double-walled container includes an outer layer accommodating therein a flexible inner layer forming a collapsible bag in which a fluid product is contained. When the dispenser cap is depressed and actuated, the fluid produce is gradually pumped out of the container, which induces a negative pressure inside the inner layer by which the inner layer is collapsed toward the dispenser cap to completely expel the fluid produce out of the container with repeated actuation of the dispenser cap.

Abstract: A fluid dispenser includes a diluent fluid inlet; a fluid-driven proportioning air pump in fluid communication with a diluent fluid inlet, the air pump being driven by fluid from the diluent fluid inlet and having an air outlet isolated from the diluent fluid inlet; a fluid container having first and second openings, the first opening in fluid communication with the pump air outlet; and wherein the pump creates air pressure and flow to evacuate the container of fluid through the second opening. An associated method of evacuating fluid from a container includes supplying a diluent fluid to the proportioning air pump through the pump fluid inlet; delivering a volume of air from the pump air outlet to the container in order to displace a similar volume of fluid and evacuate that volume of fluid from the container; and diluting the evacuated fluid with diluent fluid from the pump fluid outlet.

Abstract: Atomizers for administering liquids to the cornea or conjunctiva of the eye, special eye adapters for atomizers and the use of atomizers for ophthalmological administration. The atomizers are free from propellant gas and have an energy reservoir for supplying the energy needed for the atomization process.

Abstract: A device for dispensing a product may include a stationary portion, a pushbutton configured to move relative to the stationary portion and to be actuated to cause dispensing of a product, and a spring. The spring may include an assembly portion configured to associate the spring and the stationary portion with one another. The assembly portion may include at least one turn. The spring may further include a projecting portion configured to extend substantially along at least a portion of the pushbutton.

Abstract: An apparatus securable to a top opening of a beverage bottle for selectively dispensing fluid therefrom includes a body that has a plurality of vertically aligned chambers, a spout extending outwardly from one of the plurality of chambers and a bellow section disposed within the body. The bellow section cooperates with the spout for moving between expanded and contracted positions has a passageway extending substantially parallel to the axis for selectively drawing air outwardly from the reservoir. The apparatus also includes a plunger section slidably connected to the body for operably introducing pressure downwardly from another of the plurality of chambers. A lever is adjustably engaged with the bellow section and is movable between compressed and released positions for selectively releasing pressure from the reservoir respectively.

Abstract: Dilute chemical carrying systems include multiple embodiments of pressurizable and gravity feed reservoirs, and are provided for support and carriage of a segregated accommodation space, in some cases separately provided and in others integrally provided, for metered introduction of a concentrate into such reservoir. The structures both provide storage for concentrated chemical containers, and metered measurement while eliminating waste, make up time and minimizing contact between workers and the chemicals or nutrients in their concentrated state. Metering may be preferably provided by a pump assembly, and operational blocking of the pump assembly may be provided in separate or integrated structures. A concentrate container system enables users to recycle sealed containers to even further eliminate the necessity to directly handle concentrate.

Abstract: A caulking gun has a tubular chamber to surround sleeve-like rigid tubes and compressible sausage type containers containing viscous materials including sealants, adhesives, caulking, mastics and the like. When rigid tubes are loaded into the chamber, compressed gas is allowed to surround the sleeve and a plunger loaded within the rigid tube to equalize pressure around the outside of the rigid tube. If a sausage type container is loaded into the chamber, a removable plunger is also provided to form a tight seal between the perimeter of the plunger and the inner surface of the chamber. Compressed gas introduced into the chamber preferentially acts on the plunger and an underlying end wall of the sausage to expel the material, without imparting any significant pressure to other parts of the sausage. The caulking gun includes a variable flow rate nozzle which may be removed from the device. The nozzle may be replaced with similar or different nozzle pieces of various shapes and sizes, if desired.

Abstract: A device for producing a jet of water has a portable handheld water reservoir to be filled with warm or cold water manually by the user, a battery powered handheld air or water pump to create water pressure for the generation of water jet which is delivered through a handheld nozzle system, a thin flexible disposable nozzle protector for sanitary protection of the non-disposable nozzle and nozzle tip, and an optional new medicine dispenser on the nozzle system.

Abstract: A toy water gun having a water supply tank which can be filled with water, and a water pump located on the housing for pumping water from the supply tank to at least one water pressure chamber. The water pressure chamber includes a fixed wall, and a moveable wall which substantially sealingly engages the fixed wall and is slidable away from a first end wall as water is pumped into the water pressure chamber and toward it as water is discharged. An air pressure chamber is located on an opposite side of the moveable wall from the water pressure chamber and is pressurizable with compressed air to bias the moveable wall toward the first end wall. A pump is connected to a selector valve assembly which, in a first state, allows air to be pumped into the air pressure chamber for pressurizing it with compressed air and, in a second state, places the pump in communication between the water supply tank and the water pressure chamber to allow water to be pumped from the supply tank to the water pressure chamber.

Abstract: An improved pressurizing sprayer removably attaches to the threaded neck of a container and includes a main body having a handle portion and a head portion. The handle includes a top portion with an exposed trigger and an inside portion in which a hand operated squeeze bulb pump is fitted. The head portion houses a pinch valve which is interconnected in-between a spray nozzle and a fluid conduit. Manually squeezing the pump delivers air into the container. Manually pressing the trigger continuously or intermittently opens the pinch valve allowing the fluid to flow through the conduit and out of the spray nozzle in the form of a pre selected spray pattern. Relatively few pump strokes are required to pressurize the sprayer. The tasks of aiming, spraying, and pressurizing can be completed simultaneously and with the use of only one hand.

Abstract: A miniaturized device for pressurizing fluid. The device includes a hollow piston that provides a fluid path and a valve member. The valve member is configured for axial movement so that the valve axis remains parallel to the piston axis. The valve member is arranged at one end of the hollow piston. The valve member may be partially or completely disposed within the hollow piston. The device is particularly adapted for use in a mechanically operated atomizer to produce an inhalable aerosol of a liquid medicament without the use of propellant gas.

Abstract: A toy water gun having a water supply tank which can be filled with water, and a water pump located on the housing for pumping water from the supply tank to at least one water pressure chamber. The water pressure chamber includes at least one fixed wall, and a moveable wall which substantially sealingly engages the at least one fixed wall and is slidable away from a first end wall as water is pumped into the water pressure chamber and toward the first end wall as water is discharged. An air pressure chamber located on an opposite side of the moveable wall from the water pressure chamber and is pressurizable with compressed air to bias the moveable wall toward the first end wall. An air pump is connected to the air pressure chamber for pressurizing the air pressure chamber with a user desired air pressure. Upon actuation of the release valve, the air pressure acts on the moveable wall to force water under pressure from the water pressure chamber so that a stream of water is ejected from the nozzle.

Abstract: A dispensing apparatus for a liquid product, the apparatus comprising a) a housing (2) or frame (3), b) a receptacle (4) for the liquid with a feed nozzle (4a) arranged substantially stationary with respect to the housing or frame, c) a dosing chamber (11) having an orifice (11a), d) a mechanism arranged to allow at least ejection of liquid through the orifice and e) a through passage (7) arranged to allow the ejected liquid to pass in a direction different from the feed nozzle or opening.

Abstract: A sprayer has a spray shield and a spray shield retainer. The spray shield is removably attached to the spray shield retainer for efficient storage when not in use. The spray shield can be contoured to the body of the sprayer. The spray shield is configured for attachment to a spray wand proximate to a nozzle.

Abstract: A device inhibits oxidation of wine remaining in a bottle. A stopper and an inflatable bladder replace the cork. In a first embodiment, a wine duct formed in the stopper is open when the stopper is in an extended position and is closed when the stopper is retracted. Air displaces but does not contact the wine by filling the bladder through an air duct formed in the stopper. After decanting, air that seeps into the wine chamber is removed by forcing air into the bladder, using an external hand pump inserted into the air duct. When sufficient air is pumped into the bladder to raise the wine level to contact the stopper, the stopper is placed into its retracted position. In an additional embodiment, a valve controls opening and closing of the wine duct and the stopper has no extended and retracted position.

Abstract: A pressurizing beverage dispenser removably attaches to the threaded neck of a container and includes a main body having a handle portion and a head portion. A valve spout on the head portion is moveable between a closed position and an open position. A hand operated squeeze bulb pump fitted to the handle delivers air through the discharge opening and pressurizes the container interior when the valve spout is closed. The handle portion can be structured and disposed to hold the squeeze bulb in a manner which prevents undesirable movement of the squeeze bulb and blockage of airflow to the container.

Abstract: A toy water gun provides a plurality of nozzles for discharging water in a variety of directions, volumes or spray patterns. A multi-position trigger or similar device controls selection of nozzles individually or in combinations whereby an operator can quickly choose among various modes of discharge by moving the trigger through corresponding positions.

Abstract: A miniaturized device for producing high pressure in a fluid imposes stringent requirements on the manufacturing process. The device according to the invention consists of a hollow piston displaceably mounted in a cylinder and a valve member which is guided by the hollow piston and mounted so as to be axially movable relative to the hollow piston. The valve member is arranged at one end of the hollow piston inside or immediately in front of the end of the hollow piston. The device is used in a mechanically operated high pressure atomizer. This consists of a two part housing which comprises a pump housing with nozzle, a blocking mechanism, a spring housing with spring, a non-pressurized storage container for the fluid and a medical counter integrated in the spring housing. The valve operates without any auxiliary force, closes very rapidly and is sealed tight against high pressure. The atomizer is safe and simple to operate and environmentally friendly. The fluid is metered extremely accurately.

Abstract: The invention relates to a hydraulic actuator for actuating a gas exchange valve (1) of an internal combustion engine, which valve is especially closed by the effect of a spring. The actuator is configured by a feed pump (6) with intermittent and thus variable delivery. The feed pump (6) has a high frequency and can be equipped for this purpose with piezoelectric, magnetorestrictive and/or electrochemical actuators as the feed elements. Optionally, the feed pump (6) can be operated with a stop valve (7) that is disposed downstream of the gas exchange valve (1) and that is controlled or regulated depending on the feed pump.

Abstract: A liquid-dispensing device is provided, which is simple in structure, has minimal space requirements, is operative with of a wide range of liquid consistencies, and is adapted for repeatedly dispensing a predetermined liquid volume from a liquid container. The device is particularly useful when contact between the liquid and the atmosphere is to be minimized, for example, when the liquid is a carbonated or naturally effervescent drink, fresh juice, or wines. Similarly, the device is useful when contact between the liquid and a user is to be avoided, for example, when the liquid is harsh or poisonous. The device is formed of common and easily available materials; it is inexpensive to produce and simple to operate. It is adapted for use with existing liquid containers, such as bottles, jerricans, beer kegs, or barrels, and makes pouring an easy task for anyone, and in particular, for children, the elderly, and people with disabilities.

Abstract: A stackable pressure vessel has a substantially non-circular horizontal cross-section and is capable of containing fluids having at least 50, 250 or 1000 psi. The arrangement of various elements on the vessel serve to abate loading on the walls imposed by the pressurized fluid in the vessel. The vessel has creases therein in order to increase its strength. The vessel can also have arcuate recesses in its base. The vessel can also have a foldable pump handle. The handle is substantially flush with the vessel cap when in the storage position and the shaft of the handle is substantially axially aligned with a stem operably attached to a pump assembly when the pump handle is in the pump position.

Abstract: Dilute chemical carrying systems include multiple embodiments of pressurizable and gravity feed reservoirs, and are provided for support and carriage of a segregated accommodation space, in some cases separately provided and in others integrally provided, for metered introduction of a concentrate into such reservoir. The structures both provide storage for concentrated chemical containers, and metered measurement while eliminating waste, make up time and minimizing contact between workers and the chemicals or nutrients in their concentrated state. Metering may be preferably provided by a pump assembly, and operational blocking of the pump assembly may be provided in separate or integrated structures. A concentrate container system enables users to recycle sealed containers to even further eliminate the necessity to directly handle concentrate.

Abstract: A dry wall tool includes a tubular, L-shaped device having a tapered end. A sleeve is disposed around the tapered end. The other end of the tubular device is adapted to receive an existing filler nozzle or it may be fitted with its own filler nozzle. The tapered end is adapted for removable insertion into an open end of the gooseneck of a dry wall mud pump. A finger ring is disposed on the outer surface of the device so that the device may be easily manipulated. The device eliminates the requirement for the box filler adapter and for wrenches needed when switching from bazooka tools to box tools.

Abstract: An apparatus for containing a fluid, said apparatus comprising (d) at least two internal chambers, (f) a fluid product line leading from each chamber to (g) a junction for product lines from at least two of said chambers to produce a mixed product, (h) means for delivering a desired ratio of fluid products in said mixed fluid product, (i) an exit line from said junction for said mixed fluid product, and (j) means for reversibly closing said exit line.

Abstract: An easily operable telescopic pump includes a first cylinder, a second cylinder, a grip and a nozzle. The second cylinder is inserted in the first cylinder. The grip is communicated with the second cylinder. The nozzle is communicated with the grip. A pipe extends through the grip and includes an end inserted in the second cylinder and an opposite end connected with the nozzle.

Abstract: A toy water shooter may be worn in a concealed manner on a user's forearm, beneath clothing. The shooter includes a pressurizable bladder that may be filled with water and which is plumbed to a trigger-operated nozzle mounted on a wrist support. The bladder may be pressurized by pumping an air bulb, which fluidly communicates with the bladder. The trigger is mounted in a position that allows it to be operated by thumb movement. In an alternate embodiment, the bladder may be worn around the user's waist.

Abstract: A device and use method for ejecting a liquid stream towards an eye, the stream moving from a proximal position towards a distal position, the device comprising a) a housing, b) a container for the liquid, c) at least one opening arranged for ejection of the stream and being in fluid communication with the container, d) a pump mechanism operable to deliver at least part of the liquid from the container through the opening to form the stream and e) an eyecup with a contact surface arranged for contact with the eye or its facial surroundings. The eyecup is arranged movable with respect to the opening or housing between at least two positions i) an active position with said eyecup contact surface at a defined safety distance to the opening and ii) a rest position with the eyecup contact surface at a position more proximal than in the active position and a sensor is arranged to allow discrimination between the positions.

Abstract: A water resistant audible toy, such as a toy water gun, includes a speaker having a water resistant speaker cone. The water resistant audible toy includes a switch to activate the speaker to generate sounds. The water resistant audible toy may further include a light to generate lighting effects and a motor to generate a vibration. A pressure equalizer may be further included in the water resistant audible toy. Seals may be provided as part of the water resistant audible toy. The toy water gun includes a trigger to actuate the switch. The speaker may be part of a water resistant sound effects module.

Abstract: A miniaturized device for pressurizing fluid. The device includes a hollow piston that provides a fluid path and a valve member. The valve member is configured for axial movement so that the valve axis remains parallel to the piston axis. The valve member is arranged at one end of the hollow piston. The valve member may be partially or completely disposed within the hollow piston. The device is particularly adapted for use in a mechanically operated atomizer to produce an inhalable aerosol of a liquid medicament without the use of propellant gas.

Abstract: An air pumping type fixed quantity dispensing container for dispensing food stuff, the container having a dispensing opening, including a cap, formed at a lower end of the container for dispensing the food stuff; a lid portion disposed at an upper end of the container, the lid portion including an air pumping unit for injecting the air into an inner portion of the container by the predetermined amount of distribution; and an isolating plate arranged inside the container, the isolating plate isolating the food stuff stored in the container from the air input into the container by the air pumping unit, wherein the isolating plate floats on top of the food stuff due to viscosity of the food stuff and moves along inner sidewalls of the container.

Abstract: The present invention relates to dispensing device for dispensing portions of liquid foodstuff from a foodstuff container. A pump device (5) includes a pump chamber (10) and a connecting pipe (7) or similar for connecting the foodstuff container (2) to the pump chamber (10) and a pump means (14) forming part of the pump device (5) is designed and can be affected such that said pump means (14) can generate a vacuum in the pump chamber (10), connecting pipe (7) and foodstuff container (2) for drawing foodstuff (4) out of said foodstuff container (2) to the pump chamber (10). At least portions (18) of a through-flow passage (13) for foodstuff (4) in the connecting pipe (7) taper in which the flow direction (S) in which food-stuff (4) flows through said through-flow passage (13). The connecting pipe (7) has an inlet pipe (11) which can be pressed through a flexible wall (3) of the foodstuff container (2) and be connected to a connecting member (21) therein.

Abstract: A dry wall tool includes a tubular, L-shaped device having a tapered end. A sleeve is disposed around the tapered end. The other end of the tubular device is adapted to receive an existing filler nozzle or it may be fitted with its own filler nozzle. The tapered end is adapted for removable insertion into an open end of the gooseneck of a dry wall mud pump. A finger ring is disposed on the outer surface of the device so that the device may be easily manipulated. The device eliminates the requirement for the box filler adapter and for wrenches needed when switching from bazooka tools to box tools.

Abstract: A liquid soap reservoir in which the liquid soap is expelled from the reservoir due to pressure exerted on its contents by a second, low viscosity pressurized fluid, with the associated pumping mechanism being removed from the soap path and acting only on the second fluid. The reservoir comprises a first closed container having an inlet in fluid communication with the pumping mechanism for selectively admitting the second fluid into the first container. A second collapsible closed container is disposed within the first container for containing the liquid soap and has an outlet in fluid communication with the outlet of the dispenser. Accordingly, when the second fluid, under pressure from the pump, is admitted into the first container, pressure is exerted on the second container to partially collapse the second container and expel a quantity of the liquid soap from the second container out through the outlet of the dispenser.

Abstract: A noncontainer pressurizing pump sprayer includes a body, which defines a chamber. A piston is positioned within the container and is coupled to a shaft. The piston divides the chamber into an upper section and a lower section. An inlet valve is positioned on the body and permits flow of fluid into the lower section but restricts flow out of the lower section. The shaft of the piston is coupled to a handle. A spray nozzle includes an actuator that is coupled to a control valve and a discharge outlet that is in fluid communication with the lower section of the chamber. In one embodiment, a tube extends continuously from a point upstream of the control valve to a point downstream of the control valve. In another embodiment, a tube is coupled to the piston and extends through the handle. In another embodiment, the tube extends continuously from the spray nozzle and is coupled to the piston.

Abstract: The present invention comprises a medication delivery pump that is configured to administer an infusion therapy using a medication delivery container. Medications in a flexible bag are expelled from the bag and delivered to an infusion site. A fluid delivery pump of the invention may have a constant force spring and a mechanical timer. The constant force spring is configured to compress a flexible fluid container. The mechanical timer assembly is coupled to the constant force spring and limits the maximum rate at which the spring compresses the fluid container. The pump may include first and second doors for charging the spring. Opening the first pump door partially charges the constant force spring and opening the second pump door fully charges the constant force spring. The pump provides improved administration of infusion therapy which is particularly advantageous for reducing errors, infections and other complications associated with manual infusion techniques.

Abstract: A device for dispensing carbonated beverages and collapsing the containers for the beverages.

Abstract: A self-contained device of unitary structure for spraying a cosmetic substance onto a keratinous medium, in particular the skin, the device comprising a supply of substance to be sprayed and a receptacle containing a gas, together with a valve making it possible, when actuated, to spray the substance, the substance containing solid particles and at least one dispersing or jelling agent.

Abstract: The multiple use hand operated pump consists of a rhomboid head (1), a mountable curve shaped outlet part (3), a pumping pipe part (2) with a special base (9) bearing valve (12) and a liquid inlet (13). A piston (4) with external grip (5a) on its upper end and an especially constructed valve (5,6,7,8) on its lower end, as well as a tapered component (14) constituting means of supporting, stablelising and mounting of the pipe part (2) of the pump on any liquid container.

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: A spring-controlled snap action valve assembly and an apparatus for dispensing pressurized liquid using the valve assembly, the apparatus including a connection to a source of pressurized liquid, a spring-controlled snap action ball valve assembly including a snap action ball valve, an inlet and an outlet, a conduit in fluid communication from the connection to the valve assembly inlet, a nozzle in fluid communication with the valve assembly outlet, and an actuator connected to the valve assembly to actuate the snap action ball valve from a closed position to an open position and from an open position to a closed position.

Abstract: A miniaturized device for pressurizing fluid. The device includes a hollow piston that provides a fluid path and a valve member. The valve member is configured for axial movement so that the valve axis remains parallel to the piston axis. The valve member is arranged at one end of the hollow piston. The valve member may be partially or completely disposed within the hollow piston. The device is particularly adapted for use in a mechanically operated atomizer to produce an inhalable aerosol of a liquid medicament without the use of propellant gas.

Abstract: A grout slurry pumping system, and a grout slurry control box and associated tools are described. Methods of using the pumping system and control box are also described. The pumping system and control box may be used separately or together. The pumping system maintains a grout slurry of desired consistency and can provide it through a hose to remote locations. The control box operates to apply grout to a work surface in desired quantities and in desired amounts according to a control valve.

Abstract: The present invention provides a toy water gun including a pump for pressurizing the gun for shooting out a stream of water, a trigger for controlling the flow of the water, and a source of electricity and at least one light source for illuminating the stream, wherein the device is adapted to provide a lighted coherent stream of water.

Abstract: A beverage tapper having at least two supply lines includes a beverage tapper and at least two supply fittings. The beverage tapper is normally used to pump a quantity of beverage out of a beverage container. The at two supply fittings are preferably formed radially outward from the supply cavity of the beverage tapper similar to any existing beverage tapper. Existing beverage tappers may be modified to form the beverage tapper having at least two supply lines by attaching at least one attachable supply fitting adjacent the existing supply fitting.

Abstract: A liquid sucking and dispensing device includes a body having a passage and an air inlet and an air outlet are respectively located one two ends of the body. A first valve is engaged with the passage at a mediate section of the passage and a second valve is engaged with the passage at a second end of the body. An opening is defined radially through the body and communicates with the passage and an interior of a container. When the second valve closes the passage, pressurized air enters the container to push liquid in the container out from the container.

Abstract: A liquid sucking and dispensing device includes a body having a passage and an air inlet and an air outlet are respectively located one two ends of the body. A first valve is engaged with the passage at a mediate section of the passage and a second valve is engaged with the passage at a second end of the body. An opening is defined radially through the body and communicates with the passage and an interior of a container. When the second valve closes the passage, pressurized air enters the container to push liquid in the container out from the container.

Abstract: An oil aerosol has a can member and a compressing member. The can member has a covering part coupled to a can body. The compressing member has a holding tube fitted to the covering part, and received in the can body. A cap is movably disposed in, and has airtight connection with, the holding tube with an elastic member disposed on the bottom to bias same upwards. When the cap is moved up and down by depressing and releasing depressing element placed on the top of the cap, air will be forced into the can member through vent holes of both the cap and the holding tube to increase air pressure in the can member, permitting oil to be dispersed to outside through a nozzle when depressed; both the cap and the holding tube have non-return valves for permitting air to flow only in the above direction into the can member.

Abstract: A miniaturized device for pressurizing fluid. The device includes a hollow piston that provides a fluid path and a valve member. The valve member is configured for axial movement so that the valve axis remains parallel to the piston axis. The valve member is arranged at one end of the hollow piston. The valve member may be partially or completely disposed within the hollow piston. The device is particularly adapted for use in a mechanically operated atomizer to produce an inhalable aerosol of a liquid medicament without the use of propellant gas.

Abstract: The present invention relates to a liquid dispensing apparatus comprising a liquid container, a base and an air pressure device; the liquid container has an internal reservoir for containing the liquid and a dispensing conduit connected to a dispensing nozzle; a part of the dispensing conduit may be situated within the reservoir and is adapted to transfer the liquid from the reservoir to the dispensing nozzle; the base has a surface for holding a liquid receiver; the dispensing nozzle of the liquid container may be positioned above the surface of the base so that when the liquid receiver is situated upon the surface, the liquid from the dispensing nozzle will go into the receiver; the air pressure device is designed for creating pressurized air and is mounted in conjunction with the base; the pressurized device is connected with the internal reservoir of the liquid container, whereby upon operation of the air pressure device, pressurized air is supplied to the internal reservoir of the liquid container which

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).