Abstract: The improved precompression pump has a body in which a hollow stem is slidingly disposed under the control of a knob or pushbutton provided with a nozzle. On the stem there is mounted a piston arranged to move along the stem against the action of a spring to uncover ports through the stem which communicate with the cavity in the stem. A non-return (intake) valve is positioned between the piston and a dip tube which is immersed in the product to be dispensed. The spring has a portion which is substantially cylindrical and another portion which is substantially conical, and moreover is not in contact with the product. The spring is secured at an intermediate point to the stem, acts at one end against the piston and is secured at its other end to the body.

Abstract: A portable oil sump residual engine oil suction pump device, which comprises an oil reservoir having received therein a pump body to change the inner space of the oil reservoir into a negative pressure status so as to efficiently induce residual engine oil from an oil sump into the oil reservoir. A floating choke valve is fastened inside the oil reservoir at an upper position, which follows the filling of certain quantity of engine oil in the oil reservoir to block up a passage way to the pump body so as to stop the formation of vacuum and prohibit from entering of engine oil in the pump body.

Abstract: A reciprocating pump for dispensing liquids from a container comprises a hollow body in which is slidably fitted a hollow piston. A piston seat is located in the body and provides a segment sized for sealing fit inside the hollow piston, thereby minimizing possible leakage through the pump when it is transported with a liquid filled container. Upper and lower valves are provided in the piston and body respectively. The piston seat is adapted to interact with the upper valve member to hold it open during a portion of an upward stroke of the piston thereby drawing any undispensed liquid back into the pump.

Abstract: A manually-operated dispenser for user-controlled discharge of an internally-stored fluid includes a variable length assembly normally driven to its maximum longitudinal extension for fluid-tightly closing a fluid discharge opening and a vent opening disposed at opposite ends of an elongated housing, a piston bounding an end of an internal fluid reservoir and operatively movable along the housing for volumetrically reducing the reservoir and for driving stored fluid toward and through the discharge opening, and an actuator assembly manually operable by the user for causing controlled foreshortening of the variable length assembly whereby the fluid discharge and vent openings are concurrently opened permitting the forced discharge of a correspondingly controlled volume of stored fluid.

Abstract: A spray head for use with a receptacle containing a liquid which is maintained under pressure by a propellant gas, thereby enabling a product to be packaged so that it is protected from coming into contact with the air, the spray head being of the type comprising a manually-operated precompression pump which includes a pump chamber comprising first and second cylinders (11, 15) capable of engaging telescopically, said chamber being closed by relative displacement of said cylinders, said first cylinder being integral with the pump outlet valve and being provided at one of its end with a circular sealing lip (12) capable of engaging against and of sliding along the wall of said second cylinder, which second cylinder is in communication with the inside of the receptacle, said wall being provided at at least one of its ends with fairly substantial relief (18, 25) such that when said sealing lip lies over said relief and said relief causes sealing to be broken, a passage is opened suitable for passing gas at a rat

Abstract: A push up fluid dispenser having a fluid storage container and a vertically oriented plunger carried in the container, with the plunger being manually pushable upward for dispensing fluid from the container. The container includes a valve cylinder mounted in the container and having an upper opening and an interior passage for slidingly receiving the plunger, and the plunger having a fluid flow passage therein providing a flow path from the cylinder interior to the exterior of the dispenser. A first one-way valve is disposed for control of fluid flow into the cylinder interior through an upper opening and a second one-way valve is disposed for control of fluid flow from the cylinder interior into the plunger passage, with a spring between the cylinder and plunger urging the plunger downward.

Abstract: The pump comprises a chamber divided into a lower cavity occupied by the fluid and an upper cavity at atmospheric pressure. A flexible ring piston sealingly runs in the chamber and is inserted in a slidable way on a stem valve, with which it co-operates to enable or interrupt the outward flow of the fluid. The piston has a tapered section at its lower end, which engages by friction in a corresponding tapered groove of the stem valve to allow delivering of a fine mist with a very low delivery pressure also.

Abstract: The thrust piston pump of a delivery apparatus for liquid media and the like is provided with a valve arrangement in the suction passage. The valve arrangement has two valve seats acting in opposing manner and is associated with a single common valve body. This permits a rapid transfer of the valve body into the closed position engaging on the valve seat, particularly during operation in an inverted position. In addition, the discharge passage has a mechanically openably discharge valve which can be simply opened by displacing the actuating head of the pump with respect to a collar of the pump piston.

Abstract: A seal device for hand pumps for dispensing a substance such as paste or liquid products from bottles containing such products, wherein upper closure element of the pump is formed of elastically deformable plastic material. In an axial hole of the closure element there is provided an annular lip defining a circular aperture of diameter slightly less than that of a corresponding part of the pump stem to ensure a seal between the stem and closure element during pump operation even when the bottle is inclined or inverted, while allowing a certain quantity of air to be drawn in to compensate the quantity of substance dispensed. The stem collar has on its upper face a coaxial annular seal rib which engages against the lower face of the closure element under the thrust action of a spring to provide a seal when the pump is not under operation.

Abstract: A dispenser for pasty compositions, having a housing within which a piston displaceable in only the direction of emptying is arranged. An actuator enables a headpiece to act on a restorable wall which can be pressed in the direction towards the piston, the headpiece having a dispenser outlet opening. The wall forms an outlet tube the opening of which is coordinated to the outlet opening, and on which opening a stopper is formed which closes the outlet opening. The outlet opening is formed in the front side actuator and the actuator can act on the wall by means of the lever transmission.

Abstract: An apparatus for facilitating the filling of a spray device, the spray device being constituted by a receptacle and an extraction and projection pump mounted on the receptacle. The pump is of the precompression type and includes a valve member (8) having a pin (9) which is held pressed against a seat (7) by a spring (10) whose characteristics determine the degree of precompression. The seat is formed around the axis of the delivery piston (4) of the pump, and wherein breakable or deformable projections (15) are formed on the valve member suitable for holding the valve open so long as said projections are not destroyed or deformed.

Abstract: A spray pump comprising a main cylinder and a secondary cylinder with a main piston and a secondary piston, first and second springs are provided for urging the pistons to particular positions. A fixed attachment between the main piston and the secondary cylinder and the latter forms a space with a closed bottom and an open upper end through which the interior of the main cylinder and the secondary cylinder are in communication.

Abstract: Leakage of liquid from a container having an atomizer of the type including a cylinder piston moveably mounted within a ring body and defining an annular air gap therebetween is prevented by providing the upper end of the ring body with an inwardly directed annular flange disposed in sealing and sliding engagement around the piston to prevent escape of fluid from the air gap due to inadvertent movement of the piston. The piston includes either a stepped diameter configuration or a plurality of circumferentially spaced longitudinal grooves which, when encountered by the flange after the piston has been intentionally moved a predetermined distance, permits air to flow through the air gap for dispensing liquid from the atomizer.

Abstract: An elastomeric piston member of a product dispenser for semi-viscous liquids includes integrally molded priming valve structure as well as check valve structure. The priming valve comprises a number of generally flat, triangular segments arranged around the periphery of an outlet conduit leading from a pumping chamber, and during a pumping stroke of the piston member, outermost tips of each segment deflect laterally to allow discharge of products from the chamber. The triangular segments are molded in an open or spaced apart orientation to facilitate manufacture, and are biased by ribs of a discharge spout toward a closed, inclined orientation in contact with adjacent segments once the dispenser is assembled.

Abstract: A pump comprises an open-ended hollow body defining a pump chamber and an inlet orifice which communicates with a reservoir. The pump body has four side walls. A piston is mounted for reciprocal movement through a portion of the body and it extends through the upper end of the body. A ferrule is disposed above the body and defines an aperture through which the piston extends. A seal is disposed is disposed between the ferrule and the body, and the seal surround a portion of the piston. A spring is mounted in the body, and the spring actively biases the piston toward the top of the body. The body has a deformable zone which has at least a portion of one side wall which is a noncircular cross-section and is radially elastically deformable. The piston has a portion which blocks the inlet orifice when the piston is depressed a first predetermined distance.

Abstract: A pumping mechanism for a bottled lotion is constructed so that lotion is prevented from flowing out of the bottle if the bottle is inadvertently not placed upright. The pumping mechanism includes a hollow cylindrical member, a piston member, a hollow operating rod, a cap, a hollow pressing member, a ball, an upper valve, and a compression spring arranged in a manner so that when the operating rod is pressed downward, it will disengage the upper valve from the piston member before the bottom end thereof matches against the piston member.

Abstract: A trigger actuated sprayer for dispensing liquid products featuring a movable hinge point for the trigger handle in the form of a flexure. The flexure allows a constant orientation for the spray nozzle to be maintained by accommodating changes in radial distance as the trigger handle is depressed, while decreasing the complexity and parts count of the overall structure. A sealing member is incorporated into the piston and the cylinder of the pump for the device to reduce leakage of the liquid product when the pump is not used or is inverted.

Abstract: A valve in which standardized, interchangeable components are used for converting the valve to use either in a manually operated pump or an aerosol valve. A poppet member is reciprocable in a valve chamber between a flexible valve housing and a main cylinder housing. By making minor modifications to the poppet member and cylinder housing the valve can be adapted or converted to use either in a manually operated pump dispenser or an aerosol dispenser. Unique valve retaining means for attaching a valve to a container is also disclosed. In one form, snap detents secure together peripheral flanges of the valve housing and cylinder housing and also secure the housings to the container neck. In another form, interfitting structure on the flanges align the housings relative to one another, and a gasket is interposed between the flanges so as to seal the flanges relative to one another and relative to the container neck, with a retaining ferrule engaging and securing the flanges to the container neck.

Abstract: A hand pump for delivering a predetermined quantity of paste or liquid substances contained in a bottle comprises an overall tubular hollow main body for receiving the pump operating members, including the operating stem which projects from one of the two ends of the main body. For retaining the stem within the body, the pump comprises a retention element with a hole through which the stem passes. The retention element is provided with projections or recesses arranged to respectively snap-engage corresponding recesses or projections provided in or on the main body.

Abstract: The device comprises a pump with its plunger mobile in a cylinder against the action of a spring, and a delivery button associated with the plunger for controlling its delivery movement. The button incorporates a shut-off member provided on a flexible diaphragm fixed peripherally in a seat in the button.

Abstract: An atomizing pump dispenser which includes a valve member having a flattened top so that the diameter of the sealing area in the outlet is increased substantially. A recess within the valve member is modified to provide conical ball sealing oprtions tapered at predetermined angles to provide a tight seal between the ball and the valve member. The innermost end of an inner hollow part of the valve member is a reduced diameter portion such that the initial movement of the valve member is easier. This in effect, tricks the user's finger by easing the initiation of movement of the actuator so as to give the feel of free movement. The inner part of the valve member is provided with a molded-in slotted protrusion for breaking the seal between the valve member and a flexible annular seal, thus alleviating the creation of the vacuum caused by the seal between the ball and the ball seat.

Abstract: A manually-operated dispenser for user-controlled discharge of an internally-stored fluid includes a variable length assembly normally driven to its maximum longitudinal extension for substantially closing a fluid discharge opening and for fluid-tightly closing a vent opening disposed at opposite ends of an elongated housing, the fluid discharge opening being normally sufficiently closed so as to prevent discharge of stored fluid through the discharge opening but permitting predetermined bleeding of fluid from the housing interior through the discharge opening, a piston bounding an end of an internal fluid reservoir and operatively movable along the housing for volumetrically reducing the reservoir and for driving stored fluid toward and through the discharge opening, and an actuator assembly manually operable by the user for causing controlled foreshortening of the variable length assembly whereby the fluid discharge and vent openings are concurrently opened permitting the forced discharge of a corresponding

Abstract: A portable sprayer has a container is provided with a threaded hole for selectively mounting to either a hand pump which pressurizes the interior of the container or an electric pump, which may be operated by batteries or a rechargeable accumulator, which delivers the liquid to the sprayer without pressurizing the container. The container is provided with another threaded hole for filling purposes. This hole can be closed by a leak-tight stopper, which is equipped with a valve or a pressure gauge if the hand pump is used, or by a simpler stopper if the electric pump is used.

Abstract: A manually-operated dispenser for user-controlled discharge of an internally-stored fluid includes a variable length assembly normally driven to its maximum longitudinal extension for fluid-tightly closing a fluid discharge opening and a vent opening disposed at opposite ends of an elongated housing, a piston bounding an end of an internal fluid reservoir and operatively movable along the housing for volumetrically reducing the reservoir and for driving stored fluid toward and through the discharge opening, and an actuator assembly manually operable by the user for causing controlled foreshortening of the variable length assembly whereby the fluid discharge and vent openings are concurrently opened permitting the forced discharge of a correspondingly controlled volume of stored fluid.

Abstract: A condiment pump having a container and a lid. A cylinder extends downward into the container and contains a piston and a piston rod. A lower ball valve is located near the bottom of the cylinder, and a side arm tube extends from the lower ball valve to the top of the container. An upper ball valve is located at the top of the side arm tube, and a spout extends upward from the side arm tube. A washer plate covers the upper end of the side arm tube and has a eccentric hole and a post. The post extends downward from the washer plate to keep the ball of the upper ball at least a predetermined distance away from the hole. A pin engages one of eight notches in the rim of the washer plate. This allows the washer plate and the spout to be rotated through eight different positions.

Abstract: A submersible positive displacement piston pump includes a cylinder for insertion within a body of liquid, the cylinder including a working end and an opposite end, an inlet port, an outlet port and a working chamber bounded by the outlet port and the working end; a piston rotatably and reciprocably movable in the cylinder between a retracted positon and an extended position for pumping liquid from the inlet port to the outlet port, the piston including a free end having a recessed section alternately in fluid communication with the inlet port and the outlet port; a pivoting assembly pivotally connected to a drive motor which rotatably and reciprocably drives the piston in the cylinder; and an extension assembly for connecting the pivoting assembly to the piston and for ensuring that the pivoting assembly and the drive motor are positioned out of the body of liquid when the piston and cylinder are positioned in the body of liquid, the extension assembly including a shaft extension for connecting the pivoting

Abstract: The object of the invention is a combination of a portioning system and a flexible tube to contain and distribute a paste product or a cream. By pressing on the flexible tube, the system can be completely filled. Exact portions of the product can be obtained and the product is not exposed to the air, does not dry out and is not contaminated.

Abstract: A product dispenser for viscous products is described comprising a tubular container, a liquid pump dispenser, and a take-up piston which advances towards the pump dispenser as product is dispensed therethrough from the container. The take-up piston has a central depression to accommodate the lower portions of the housing of the pump dispenser when the piston reaches its uppermost location when the container is nearly fully evacuated of product. Transverse slots cut downwardly in the upper surface of the piston extend radially outwardly from the central depression to the sides of the piston to provide a means to bleed or vent off unwanted air entrapped in product which lies in the central depression.

Abstract: A package for containing and dispensing a viscous product such as toothpaste. The package includes a cylindrical container with a perforate spider member across an end of the container, such end serving as a dispensing end. A generally rigid, hemispherical pumping member with a discharge spout is reciprocatingly affixed to the dispensing end of the container, and is connected to a rodlike member which slidingly extends through the spider member and through a follower piston which is originally spaced away from the container. The container is operated by the application of hand pressure against the pumping member to move it toward the follower piston, with the pumping member being biased toward its original position upon the removal of the hand pressure by flexible portions of the rodlike member which engage the perforate spider and which are distorted by the movement of the rodlike member through the perforate spider.

Abstract: The instant moveable valve assembly mainly comprises a piston body and a moveable valve body associated with the piston body. The moveable valve has at its middle portion a sleeve which is provided with a flattened shoulder. The outer edge of the flattened shoulder is formed with a projection while the lower end of the sleeve is furnished with an outward projection having an inverted triangular shape. In use, the pressure generated by the pressurized liquid perfume in a perfume bottle can be efficiently applied to the flattened shoulder and the outward projection of the sleeve in order to facilitate the downward movement of the sleeve.

Abstract: A viscous product dispenser is described which comprises a tubular container body adapted to hold product, a take-up piston at the lower end of the body which decreases the internal volume of the container as product is dispensed from the container, and a bulk liquid pump dispenser at the upper portion of the container body having a dip tube extending into the container body and a finger depressible, spring-biased piston/cylinder pumping mechanism. The pumping mechanism of the bulk liquid pump dispenser has a product outlet conduit which is parallel and coaxial to the outlet axis of the dip tube and the center of the piston. The piston/cylinder pumping mechanism is of substantially less cross-sectional area than the internal diameter of the container body.

Abstract: A package for containing and dispensing a viscous product such as toothpaste. The package includes a cylindrical container with a wall extending across an end of the container, such end serving as a dispensing end, and the wall has an opening which is surrounded by a spout through which the viscous product is dispensed. A pumping piston is positioned within the container near the dispensing end to subdivide the container into a reservoir below the pumping piston and a staging area above the pumping piston and in communication with the discharge spout, and to pump viscous product through the discharge spout by the movement of the pumping piston toward the discharge spout.

Abstract: A returnable container system for containing and dispensing liquid chemicals and the like. The system has a drivable reciprocatable pump and a one-way check valve in the suction tube of the system. An attachable assembly unit is provided which includes a rod extension that is reciprocatably driven by a motor and is attachable to the pump rod for the drive of the pump and which includes a counter for indicating the amount of chemicals dispensed from the container. The container system gives the user the option of using the system in a first condition in which the assembly unit is attached or in a second condition in which the assembly unit is detached and the user uses his own separate pump but utilizes the one-way check valve in the suction tube.

Abstract: A pump driven portable sprayer powered by rechargeable batteries. The pump and batteries are housed in a rigid pipe which is threaded onto a liquid tank in extension through a fill opening of the tank. Extending from the pipe is a flexible hose which carries a spray wand on its end. A cap on the pipe is equipped with electrical connections for a battery charger and for alternative power sources such as an AC adapter, a vehicle cigarette lighter adapter or a portable battery pack.

Abstract: A barbecue sauce sprayer includes a container, a pump for pumping barbecue sauce out of the container and a disc having a plurality of holes for causing the barbecue sauce to be discharged in a spray pattern.

Abstract: A fluid discharging device has a cylinder having a first valve at one end of a suction chamber, and a cylindrical piston movably mounted in the cylinder. The piston has a second valve and a suction opening. A resilient element such as a coil spring is mounted between the cylinder and the piston so that the piston is generally biased against the cylinder. This valve mechanism is disposed in a collapsable container which contains a fluid. The cylinder is connected to an opening of the fluid container so that the first valve is exposed. The fluid discharging device can be disposed within a casing which has a refined appearance and includes an actuator for manually actuating the valve mechanism.

Abstract: A manually actuated pump that dispenses liquid substances in measured quantities from the contents of bottles and containers which is comprised of a handle capable of being axially displaced against the action of a spring, a cylinder having a pump space whose volume is reduced on manual actuation of the handle, a feed tube connected to the cylinder, a piston driven by the handle that displaces the volume in the cylinder, and two valve-closing surfaces for alternately opening and closing the passage leading to the feed tube and the discharge duct contained in the handle so that only a known measured quantity of liquid will be dispensed from the bottle.

Abstract: The thrust piston pump of a delivery apparatus for liquid media and the like is provided with a valve arrangement in the suction passage. The valve arrangement has two valve seats acting in opposing manner and is associated with a single common valve body. This permits a rapid transfer of the valve body into the closed position engaging on the valve seat, particularly during operation in an inverted position. In addition, the discharge passage has a mechanically openable discharge valve which can be simply opened by displacing the actuating head of the pump with respect to a collar of the pump piston.

Abstract: A water supply device for vacuum bottle used a space at the bottom outside the inner bottle to install a power driving device to drive a gear. The gear has two magnetic poles provided by a permanent magnetic iron using to repel or attract the other magnetic poles located at the concavity to rotate. These poles use the same shaft with a multiple blade gear, therefore, as the magnetic poles rotate, the water inside the inner bottle can be squeezed and flow out through outlet pipe.

Abstract: A pump for use with a container of liquid material for dispensing and or atomizing the liquid material in an accurate dose. The apparatus has a movable valve member which is normally biased in a closed position. Upon actuation of the pump, a fluid pressure is caused to act upon the valve member. The ratio of the area of the valve member against which the pressure acts before and after opening of the valve member is selected to be at least 1:1.5, to cause a corresponding reduction of the force necessary to open the valve and dispense the fluid upon actuation, resulting in a full stroke and single puff each time.

Abstract: A seating apparatus for sealing a semiconductor element in a resin has a plunger which injects a resin pellet into the cavities of an upper and lower mold. The plunger is driven by a reciprocating mechanism through a flexible transmission member so that the directions of movement of the plunger and the reciprocating mechanism need not be parallel. In preferred embodiments, the reciprocating mechanism is a ball screw mechanism which is driven by a servomotor, and the flexible transmission member is a roller chain which is slidably disposed within a lower mold. The lower mold may be longitudinally divided into a plurality of sections which are detachably secured to one another to enable easy manufacture and disassembly. A ventilating mechanism for passing cooling air along the length of the roller chain during molding may be provided to prevent the roller chain from being damaged by the heat of molding.

Abstract: A fillable toothbrush provided with a handle containing a dispenser for toothpaste is disclosed. One end of the handle is provided with a stem through which a duct is provided from a storage chamber to an outlet adjacent to a brush arranged at the free end of the stem. An actuating element is provided at the end of the handle remote from the stem. When actuated, the actuating element moves a valve that closes off the storage chamber from the duct and pushes toothpaste through the duct to the brush. When the actuating element is released, the valve retracts and permits toothpaste in the storage chamber to flow into the duct. The dispenser toothbrush is of simple design and allows defined quantities of toothpaste to be dispensed in a reliable way.

Abstract: A spray pump having a connecting portion connectable to a container and whose housing is provided with co-axially step bores defining a venting chamber for venting the container and a pump chamber. The pump piston has oppositely conically divergent lips engaging the walls of the respective chambers and is hollow to receive the restoring spring which can also bear upon a checkvalve ball.

Abstract: The dispenser device in accordance with the invention comprises a tubular barrel filled with the product, a nose having a dispenser orifice, possibly closed by a detachable cap, a plunger and a pump assembly for pressurizing the product to be dispensed. This assembly comprises an obturator valve applied against a seat by a stem of the plunger which is biased by a spring. A skirt of the plunger slides in a socket of the barrel in a leakproof manner only over a portion of its stroke. The depression of the plunger actuates the opening of the valve and the pressurization of a quantity of air under the skirt. Air pressure is exerted on the product to cause it to emerge from the orifice.

Abstract: A system for producing confectionary products, especially lollipops, is disclosed. The system includes a plurality of molds mounted on a conveyor belt assembly. A dispensing means adapted for injecting a predetermined quantity of fluid into each of the molds is positioned proximate the belt. A stick handle inserter for receiving a plurality of elongated sticks, and thereafter inserting a single handle into each of the fluid retaining molds, is positioned adjacent the belt either before or after the dispensing means. A cooling means for cooling the viscous fluid to aid in its solidification is associated with the belt. A transfer means positioned proximate the belt is adapted to remove the finished confectionary product from the mold and thereafter transfer that product to a station for wrapping.

Abstract: A pressure vessel for a backpack agricultural sprayer is mounted within a container of the sprayer and connected to the sprayer pump so that liquid from the container is forced under pressure into the pressure vessel for a spraying discharge therefrom. Sediment precipitated from herbicides or insecticides employing wettable powders tends to collect at the bottom of the pressure vessel and a combined sediment agitating and pressure regulating action is provided by a pressure regulator valve mounted in the pressure vessel and having a suction tube connected between the valve and the area of the pressure vessel where the precipitated sediment collects.

Abstract: The discharge pump of a discharge apparatus for flowable media is provided with a ventilating channel for the ventilation of the active substance dispenser and the resulting ventilation connection along the channel passes through a bacteria filter. The filter is arranged on a casing of the pump disposed within the reservoir, the filter facing an opening on the casing for the ventilating passage, at a slight spacing from the pump casing. Thus, bacteria which otherwise could penetrate with the ventilating air passing along the ventilating channel from the discharge pump into the reservoir, is held back within the discharge pump.

Abstract: A discharge pump for expelling fluid from a container comprising a pump chamber, aligned plungers disposed in said pump chamber movable in reciprocation therein and in unison and relative to each other to alternately trap a charge of fluid therebetween, isolate the trapped charge from the container and discharge the trapped charge from the container.

Abstract: A pump sprayer has a body with aligned relatively large and small diameter cylinder portions and relatively large and small diameter pistons respectively reciprocable therein and delimiting with the cylinder a variable volume pump chamber during pumping, the small diameter piston shifting relative to the large diameter piston for opening the discharge. Cooperating limit stops acting between the piston members limit the relative movement thereof during a valve open position so as to thereby limit the duration during which the discharge passage is open irrespective of different external reciprocating pressures applied during pumping, such that the output of the sprayer is controlled during pumping.

Abstract: A garden sprayer for dispensing pressurized liquids has a pressure vessel mounted within a liquid reservoir container. The pressure vessel carries a diaphragm pump which is detachable as a complete unit and which extends from the container for connection to a pivoted actuating lever that is fulcrumed on the container. The diaphragm, which is directly driven by the pivoted lever, is guided in position and orientation by a guide piston fixed to the diaphragm and slidably guided within the pumping chamber. A pair of input and output check valves, mounted at the end of the pump, permit liquid from the container to be drawn into the pumping chamber and to be forced from the pumping chamber into the pressure vessel. A manually controlled valve on a spray nozzle, which is connected to the pressure vessel, controls pressurized discharge of liquid.