Abstract: A dispenser body comprises an upper portion and a lower portion vertically extending from the upper portion. A piston is substantially L-shaped, comprising a horizontal nozzle fixed to the upper portion and a piston body located at the lower portion. A cylinder is coupled with a swingable trigger and located at the lower portion; it can reciprocate when the trigger is squeezed and released. An inlet conduit is formed within the cylinder, whereas an outlet conduit is provided within the piston. A slit is cut in the front section of the lower portion. Thanks to this slit, the lower portion is resiliently fitted in a bottle cap and, thus, connected thereto. The rear end of the trigger and the nozzle can pass through this slit. The proximal end of the bottle cap is held between the lower edge of the rear section of the lower portion and an engagement member formed on the lower portion.

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 disclosed spray cap comprises a manual trigger connected by a living hinge to a hollow main body; a joint-free member of plastic comprises a pump-chamber bellows and a discharge tube in the main body, and a projecting dip tube; a nozzle is threaded on the discharge tube; an outlet check valve body and resilient supporting arms in the nozzle form integral portions of the nozzle; and the discharge tube has a sealing flange engaging an internal cylindrical surface of the nozzle.

Abstract: The invention relates to a dispenser for paste-like products which is characterized by a particular simple construction of its dispensing mechanism requiring a reduced number of components. Integrally connected to a supply container of the dispenser is a cylinder body slidably supporting a dispensing piston connected to an actuator cap guided on the cylinder body. The dispensing piston cooperates with the cylinder body to define a pump chamber communicating with the interior of the supply container through a non-return valve. On the other side the bottom portion of the dispensing piston is provided with a non-return valve for establishing communication of the pump chamber with a tubular section carrying the dispensing piston and at the same time acting as an outlet passage for the paste-like product. The tubular section is integrally connected to the actuator cap, the latter being biased towards a rest position by a return spring supported on a fixed counterstop, particularly on the cylinder body.

Abstract: A dosing gun consists substantially of a housing having a trigger device with a trigger lever, with which a piston arranged on a piston rod can be operated evenly by a spring, which spring is initially compressed by a use of the trigger lever and a band brake. For this purpose a cord, which can be wound up onto a cord drum, is secured to an end of the piston rod. A brake drum which is secured an a drive shaft and can be operated by a brake band, is arranged in one piece on the cord drum. With the hand wheel mounted on a left side of the drive shaft, it is possible to wind the cord onto the cord drum and to compress the spring.

Abstract: The invention relates to a piston dispenser for pasty products which has a single dispensing passage for simultaneously dispensing two products such as a stripe on toothpaste. The dispenser has a pump chamber (5) of a delivery mechanism and a stripe chamber (6) of a dispensing unit (A) disposed radially adjacent one another in free communication with the interior cavity (3) of the dispenser without the provision of valves. The dispensing unit (A) also includes the dispensing passage (29') which has an opening in communication with the stripe chamber.

Abstract: An apparatus for discharging a bead or strand of pasty material from a deformable tubular container such as a tubular bag has a bag-loadable cylinder with a front face pointing in a discharge direction, the front face having a central opening aligned with a nozzle connection of the tubular bag. A substantially piston-like pressure member is axially displaceable against the tubular bag in the cylinder. In order to avoid drooling and dribbling of material through the nozzle after interruption of the discharge process, and also to prevent jamming of the edges of the tubular bag, the pressure member has a pressure relief spring supported on the wall of the cylinder and cooperating therewith, the spring having spring tongues directed obliquely forward around the deformable bag.

Abstract: When using cartridges with delivery plungers, the afterflow of the cartridge content after the action on the piston has stopped, is annoying and undesirable. In a dispenser for such cartridges, which has a ram to act upon the piston as well as a mechanism for driving the ram forward, this drawback is eliminated by the action of at least one retrieval element which is frictionally guided on a ram. The retrieval element is movable longitudinally (distance s) relative to the dispenser body and by way of retrieval springs, engaging at the retrieval element, loadable through the forward drive mechanism. In this way, immediately after each completion of the forward drive of the ram, the ram is guided back and the cartridge plunger as well as the releasable connection between cartridge and dispenser is reduced with respect to stress. This construction has application to dispensers for a single cartridge as well as for double (two-component) cartridges.

Abstract: A gun is provided for repeatedly dispensing precisely metered quantities of liquid from a pressurized source. The gun includes a valve spool axially slidable within a valve chamber and having at least first and second blocking members for blocking the inlet and outlet ports of the valve chamber. An actuating member associated with the gun is responsive to a unidirectional force to impart relative axial sliding movement of the blocking members in the valve chamber.

Abstract: A viscous product dispenser has a positive discharge valve which is opened upon a lost motion arrangement between the spout and the pump piston at the initial actuation of the spout. The lost motion is effected by spaced apart stops on these two members permitting limited sliding movement relative to the pump piston for opening the discharge valve before the pumping movement of the piston. A piston return spring is external to the pump chamber for biasing the discharge valve to a closed position.A stop ring on the piston head may be provided for bearing engagement with an end wall of the container on which the container is mounted for isolating the load on the piston.

Abstract: A metering-type dispenser device, of integrated nature having its own liquid reservoir, particularly for the metered dispensing of liquid reagents in a chemical assay, in which there is an independence of the liquid reservoir from any pressure such as used in activating the pumping stroking of the pumping head member of the device.

Abstract: A dispenser includes a hollow dispensing tube which reciprocates within a container and which incrementally moves a piston downwardly for forcing paste upwardly through a lower inlet end of the tube and outwardly through a nozzle located at the opposite end of the tube. To facilitate the operation of the dispensing tube, an actuator is employed which is pivotally mounted at one end to a head mounted to the body of the dispenser with the pivot connection located on one side of and adjacent to the dispensing tube. A cam and cam follower extend between the actuator and the dispensing tube for initially providing an increased downwardly applied force to the dispensing tube and subsequently decreasing the force during a dispensing stroke of the actuating lever.

Abstract: The dispenser comprises a flexible sealing-tight vessel (1) disposed in a rigid chamber (3) containing a ratchet mechanism comprising ratchet teeth (6) secured to a tubular element (4) and pawls (11) on resilient arms (10) mounted on a disc (9) disposed above the flexible bag (1). Resilient elements (12) fastened to the disc (9) lower it in proportion as a drink is withdrawn from the flexible bag (1). The ratchet mechanism retains the disc (9) when the pressure in the bag (1) becomes higher than atmospheric pressure.

Abstract: A dispenser of products having a varying degree of viscosity includes a longitudinal and hollow body of circular cross-section, upon which there is mounted a funnel. The hollow body contains in a rear part thereof a piston which is arranged to push forward an assembly of movable elements including a cross-piece, a piston, a sleeve and a resilient split ring, so as to expel a product dose through a cone formed with holes and loosely lined in the interior thereof with an elastic membrane. The movable elements are returned to their initial position by the force of a spring. The cone is extended by a pouring spout, which in turn carries a tube provided with a distributor cone.

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: In a manually operated dispenser especially suited for striped toothpaste products and the like the reciprocable pumping piston is provided with a concave, product-engaging face that gently, yet forcibly, directs the product in a smooth, laminar flow out of the pump chamber and into the discharge spout when the piston is depressed through a pumping stroke so that stripes in the ribbon of toothpaste issuing from the spout are well defined and maintained in an aesthetically pleasing manner. The cooperating floating takeup piston at the opposite end of the chamber from the pumping piston is provided with a convex dome that becomes complementally received within the concavity of the pumping piston when the contents of the dispenser are nearly depleted, thereby maximizing the degree to which the dispenser is emptied.

Abstract: The present invention is directed to a toy water gun which is battery operated. The present invention water gun has a housing which has a general configuration of a gun with a barrel and a handle. A water reservoir is located within the housing and a battery operated pumping system is also located within the housing. In addition, there is a pick up tube and a water tube, one being connected to an intake valve and the other being connected to the exhaust valve of the pumping system. The water tube which is connected to the exhaust valve is connected to a spray nozzle at its opposite end which is attached to the end of the barrel of the housing of the gun. A battery chamber is also located within the housing and electric circuitry is included which connects the battery chamber to the drive motor and to a switch which is connected to a trigger on the gun.

Abstract: The invention relates to a dispenser for paste-like products which is characterized by a simplified metering device and a simple an low-cost construction in combination with reliable operation and high metering accuracy. The head piece of the dispenser includes a pump chamber at the top of a supply container communicating with the supply of the paste-like product within the container, the communication between the container and the pump chamber being established by a lateral opening in a guide member of the dispensing piston, the opening being surrounded by a bell-shaped sealing body defining a sealed communication space between the outlet opening of the container and the lateral inlet opening in the guide member of the dispenser piston. The dispenser piston is slidably mounted within the actuator cap of the dispenser which at the same time includes the dispensing channel.

Abstract: A dispenser comprises a container having a movable wall in the form of a plunger and an opposite fixed wall opening into a dispensing nozzle. Dispensing is actuated by a fixed dispenser mechanism having an operating rod with a pusher plate. The pusher plate is biased in the retraction direction by a spring, and a bayonet coupling is provided for holding a base portion of the container in relation to a socket of the dispenser mechanism.

Abstract: A dispensing container for cream-like fluids includes a cylindrical body having upper and lower closures. The lower closure is a piston which moves toward the upper closure as the fluid is dispensed from the container. Normally, the container is filled with fluid and then closed with the lower closure. The lower closure or piston is provided with a hole which permits air between the fluid and piston to escape when the lower piston is mounted in the container. The hole is sealed with a disc located at the lower inside portion of the container. The container can advantageously and rapidly reduce the quantity of air remaining in the container thereby reducing deterioration of the fluid due to contact with air.

Abstract: A liquid dispensing gun for repeatedly dispensing precisely metered quantities of liquid from a pressurized source. The gun comprises a hollow body having a valve chamber and a metering chamber connected thereto by a control orifice. An axially slidable valve spool in the valve chamber and a trigger operated actuating plunger serve to govern the reciprocation of a metering piston in the metering chamber and the admission and discharge of metered quantities of liquid to and from the metering chamber.

Abstract: Double-acting mechanical liquid spraying device having a housing which is adapted to be mounted upon and sealed to the neck of a liquid container, and which has a liquid-containing compartment therein. In the housing, aligned with the liquid-containing compartment, there is an operation cylinder which has an annular valve seat disposed transversely to and intermediate the length of such cylinder. Disposed within the liquid-containing compartment is a liquid pumping plunger of the cuff type which cooperates with the valve seat to close the opening through such seat when the plunger is in its forward terminal position, and which is driven to reciprocate within the liquid-containing compartment in forward and reverse liquid dispensing strokes. In each of such strokes the plunger forwards liquid from the liquid-containing compartment to a spray nozzle through a liquid-conducting passage.

Abstract: An apparatus for unloading heat meltable material from a container including a vertically moveable platen assembly having a platen supported by a platen carriage. The weight of the platen assembly is trapped between a balance spring which urges the platen assembly upwardly and a pressure spring which exerts a downward pressure on the platen assembly. The springs are fixed about a motor driven lead screw retaining the balance spring against the platen assembly from below and a pressure adjusting nut retaining the pressure spring against the platen assembly from above. Descent of the lead screw without an equivalent movement by the platen assembly will cause a disequilibrium in spring tensions as the balance spring expands and the pressure spring compresses. A limiting switch restricts the amount the lead screw can move after platen contact with the heat meltable material prevents further platen carriage movement.

Abstract: A liquid dispensing pump in the form of a trigger sprayer includes a thimble-shaped valving element containing inlet and outlet valves, and located within a cylindrical portion of the pump body. In one embodiment, a pressure accumulation chamber is defined between the pump body and the valving element, and a pump piston operates within the valving element and defines therewith a pump chamber in open communication with the accumulation chamber via spaced, flexible and extendable straps which interconnect the inlet and outlet valves for permitting a portion of the valving element to move axially into a discharge valve opening position. Vent valving is effected by either the pump piston or the valving element during inward reciprocation movement of the piston. In another embodiment, the sprayer is converted into a throttle pump by the provision of a pump piston which operates within the cylindrical portion of the pump body.

Abstract: The infiltration pump has an outer cylinder and an inner piston mounted for reciprocal motion within the cylinder. A fluid displacing seal is attached to one end of the piston. A coil biasing spring is placed within the cylinder between the piston and the fluid dispensing end of the cylinder. One end of the spring is seated against the fluid dispensing end of the cylinder. The other end of the spring is seated against an adaptor section which transfers the biasing force of the spring evenly over the face of the fluid displacing seal.

Abstract: A dispenser of the pressure accumulated type includes a unitary pump plunger actuated for reciprocation within a variable volume pump chamber defined by an accumulator which is displaced upon an accumulation of pressure for opening the discharge as a discharge valve thereon becomes unseated, the compression stroke of the plunger acting in a direction opposite displacement of the accumulator in a direction opening the discharge.

Abstract: A manually operated actuator for a pump employs a vertical hollow chamber. A piston is vertically slidable in the chamber between a bottom position at which no pumping action can take place and a top position at which pumping action can occur. The piston and the chamber are contained in a housing. A trigger is pivotally secured in the housing and is connected to the piston. The trigger has a first position at which the piston is held in the bottom position and has a second position at which the piston is held in the top position. The trigger is normally in the first position and is manually movable into the second position. A spring device is disposed in the housing, being secured to the trigger and spaced from the chamber and piston. The device biases the trigger into the first position whenever there is no manual pressure on the trigger.

Abstract: A dual chamber continuous discharge dispenser includes relatively movable pump piston and pump cylinder during compression and the compression strokes and together defining a variable volume pump chamber which comprises part of an encircling accumulator element which is displaced during the compression stroke for opening the discharge. A wall on the accumulator having a valve-controlled opening prevents return flow of product from an accumulation chamber back into the pump chamber during the discharge of product from the accumulation chamber.

Abstract: A dispenser for apportioned dispensing of material, particularly pasty masses. The dispenser has a piston which travels within the dispenser storage chamber toward a mouthpiece dependent on actuating steps. A slide is displaceable toward the mouthpiece by an actuating handle. The slide is guided in sealed fashion by a lip. The slide includes a wing which, upon an actuating stroke, comes in sealing fashion against the wall of an ejection channel and upon a return stroke lifts away from the wall of the ejection channel. The wing is flat in shape, and forms one resiliently movable leg of the slide. The slide is V shaped, with the V tip facing the piston, and extending into the material.

Abstract: A dispenser for paste-like products comprising a preferably cylindrical container for the product to be dispensed is provided with delivery device in the form of a delivery piston (6), the surface area of which is substantially equal to the interior cross-sectional area of the container (7). Connected to this piston is a dispensing structure (2) including a valve (4). The delivery piston is disposed within the upper end portion of the container and is designed for manual operation.

Abstract: A novel self-metering and dispensing device for fluids obtained from a pressurized fluid supply is provided. Tubing and valving means permit the introduction of fluid into and discharge from a closed cylindrical reservoir. The reservoir contains a slideably disposed piston coacting with a coil compression spring, piston travel determining the amount of fluid in the reservoir. Once the determined amount of fluid is introduced into the reservoir, the fluid is discharged by the force of the coil compression spring acting upon the piston.

Abstract: A dispenser for a liquid or pasty product comprises a container containing the respective product and having its upper end closed by a partition having at least one opening therethrough. The partition is covered by a head piece provided with an applicator and forms, together with the partition, a pump chamber, the volume of which is adapted to be varied by actuation of exterior means. The pump chamber is separated from the container by a first check valve adapted to open only towards the pump chamber and is separated from the outlet of the applicator by a second check valve adapted to open only towards the outlet.

Abstract: In an apparatus to apportion and dispense dough, wherein dough is discharged through an outlet having a lower, circumferential cutting edge and is cut off by a piston having an upper, circumferential cutting edge, the piston has an upper, integral, coaxial boss, which has a convex, frusto-conical surface extending upwardly and being spaced from the cutting edge of the piston. Also, an annulus providing the outlet has a concave, frusto-conical surface, which flares upwardly.

Abstract: A continuous low flow rate dispenser of the syringe type wherein a fluid medicament can be administered at a slow and controlled rate to a patient over a long period of time. A syringe carrier having biasing means in the form of spiral coiled springs will be placed under tension as an abutment member is moved away from an opposing slidable driver member. A standard syringe has the plunger moved to an activated position and placed in the syringe carrier with the abutment member in contact with the engagement surface at the end of the plunger rod and the opposing slidable driver member in contact with the engagement surfaces (finger flanges) on the barrel member. A control means is placed in a closed position which will hold the fluid medicament in the syringe barrel but under the biased tension of the biasing means.

Abstract: A reusable tubular casing is made of porous polytetrafluoroethylene (PTFE) membrane for the production of caseless (skinless) parboil or raw sausages. The membrane has a microstructure comprising PTFE nodes connected by PTFE fibrils with a porosity of about 70-80%, a Gurley No. less than about 28 seconds, a Bubble Point Pressure greater than about 13, and a Water Entry Pressure greater than about 40 psig. The casing is contacted on at least a part of its circumferential area by a porous support such as a cylindrical lattice. A new process for production of parboil or raw sausage involves heating the sausage in casing formed by a reusable non-adherent, vapor permeable membrane to drive off moisture and other volatile materials, and removing the sausage from the casing. The sausage can subsequently be smoked and the casing reused.

Abstract: Sprayer for fluid product in which a hand-actuated trigger forces a hollow piston mounted to move in vertical reciprocating fashion in a stationary tubular accumulator, against the compression of a spring. The product is forced upward and out through a swirl chamber adjacent the spray nozzle. Additional product is siphoned up into the accumulator by the partial vacuum created by the return of the piston to its rest position. Alternative embodiments, including both a vertically and horizontally directed sprayer, feature an annular flexible flange seating against an annular skirt below a swirl chamber, which keeps air out of the product chamber and deflects inwardly to release product under pressure. Additionally, a horizontally-directed spray-head may be attached to the vertical trigger sprayer for the purpose of converting the latter to a horizontal sprayer.

Abstract: An apparatus for dispensing measured quantities of viscous material from a pressurized supply source including a measuring cylinder having a spring loaded piston therein and a rotary valve for alternately communicating the measuring cylinder with the supply source and with a discharge outlet. The rotary valve member has axially spaced O-ring seals to inhibit leakage from the ends of the valve member and an inlet seal for sealing against leakage from the pressurized inlet passage in a direction circumferentially of the rotary valve member.

Abstract: A finger operated accumulative pressure spray pump which has two opposing and coaxial chambers. The upper chamber is fitted with an upper and middle piston urged upwardly by a spring, and the lower chamber is fitted with an opposing piston urged upwardly by a spring. A port connects the space between the two upper pistons with the external atmosphere.

Abstract: A continuous, extended spray pump which has two opposing and coaxial chambers. The upper chamber is fitted with an upper and middle piston urged upwardly by a spring, and the lower chamber is fitted with an opposing piston urged upwardly by a spring. A port connects the space between the two upper pistons with the external atmosphere, and a one-way check valve controls the liquid flow between the upper and lower chambers.

Abstract: A continuous, extended spray pump which has two opposing and coaxial chambers. The upper chamber is fitted with an upper and middle piston urged upwardly by a spring, the lower chamber is fitted with an opposing piston urged upwardly by a spring. When the upper and middle pistons are depressed, pressure is built up and the lower piston moves downward. Discharge occurs when the lower end of the lower piston is deflected by nibs on the inside of the upper chamber.

Abstract: A solenoid operated metering pump for displacement of exact amounts of fluid pumped by reciprocation of pumping piston incorporating integral check valve has an elongated valve housing with solenoid operator serving as pump actuating means attached to one housing end while the other housing end is adaptable to serve as the fluid pumping means including an appropriate housing bore passing therethrough and adaptable to receive a differential diameter piston assembly slidably movable therein to reciprocate when solenoid operator becomes electrically cycled inducing fluid flow through appropriate pump chamber created therein between piston and housing bore portion provided with fluid supply port having a detachable check valve with a simple floater for a directional flow control therethrough, means of piston actuation from a first position checking flow and discharge of the fluid delivered to the pump chamber to a second position discharging exact fluid quantity per each stroke of pump reciprocation, and means of

Abstract: Disclosed is a grease gun comprising a tubular casing having a grease pump attachment at one end and a cover at the other end which fits internally against the casing rim. A draw rod extends into the casing through the cover and carries an internal pressure collar with a compression spring acting between the cover and the pressure collar. A small section opening is provided in the casing at the pump attachment end for the expulsion of air from the casing. The draw rod can be clamped in position with respect to the cover by a clamping device and the design of the cover is such that when the draw rod is clamped in position and then pushed inwardly of the casing, movement of the cover in the casing is facilitated.

Abstract: This pumping system provides a continuous discharge of flowable product withdrawn from a container into a pressurizing chamber and pumped by a pressurizing piston there into a storage chamber just ahead of a stationary discharge nozzle. A spring acts on an accumulator piston in the storage chamber to maintain a more uniform pressure on the product there at different times in each operating cycle so as to obtain a substantially non-pulsating discharge of the product. The accumulator piston tends to move in the same direction as the pressurizing piston due to a frictional coupling acting on the accumulator piston. Air is more easily purged from this pumping system.

Abstract: A manually operated, hand-held rechargeable liquid dispensing container device having a non-pressurized, either refillable or non-refillable receptacle or reservoir, is disclosed. The device comprises a relatively reciprocating piston and cylinder defining a pressurizable chamber therebetween which can be charged with liquid from the receptacle or reservoir in the container. The piston or cylinder is reciprocated relative to the other by a charging system connected to either one which compresses a resilient means such as a spring while simultaneously drawing liquid into the chamber through a check valve at the entrance of the liquid chamber. When the chamber is charged with liquid, hydraulic pressure is exerted upon the liquid by the now compressed spring. An improved charging system permits the hydraulic pressure application to be delayed until the check valve closes, insuring a full charge in the pressurizing chamber.

Abstract: A spring actuated pump device is mounted on a container for fluids, the device including a pump chamber into which fluid from the container can flow, the spring expanding and forcing a cylinder structure against the fluid in the chamber to pressurize it, in order that opening of a discharge valve will effect spraying of a desired quantity of fluid from the device, a suitable nut being threadedly connected to the cylinder structure to enable such structure to be shifted axially, in response to rotation of the nut relative to the container and cylinder structure, to compress the spring and store additional fluid pressure energy therein. A check valve permits ambient air to enter the container to prevent a vacuum condition from developing therein as fluid is withdrawn therefrom. Moreover, fluid is prevented from dribbling from the discharge valve of the device as the spring nears the end of its expansion range.

Abstract: A multi-function dispenser may be adjusted to obtain a spray or stream of the material dispensed, either as a long duration discharge of the material or as intermittent discharges corresponding to actuation of a trigger actuator, or as a continuous discharge during actuations of the trigger, depending upon functional design variables. Structure is provided for storing an accumulated amount of material upon repeated operations of the trigger, for subsequent prolonged discharge of the material, or the accumulating structure may be bypassed for intermittent discharges of the material as the trigger is operated, or the accumulating structure may function as a holding chamber whereby a continuous discharge of the material may be obtained while the trigger is being operated.

Abstract: A pumping system is provided in which actuation of a piston and cylinder device is provided by a combination of a button and a lever. The lever magnifies the force applied to the button so that the pumping system operates at high pressure when pumping liquid product. On the other hand, when pumping air in priming the pump, the pumping system operates at very low pressure so that air can escape from the pump easily to aid in priming the pump.

Abstract: A manually operated, hand-held liquid spraying device which includes a non-pressurized, refillable or non-refillable container, is disclosed. The sprayer is a completely contained device wherein an internal cam in one part of the device which is rotated, causes a displacement of a piston, a part of which is a cam follower. Piston displacement vacates a chamber which is simultaneously charged with liquid. The piston is moved as a result of the cammed motion against a responsor biasing it. The biased responsor generates a hydraulic pressure on the liquid now in the chamber vacated by the piston, since a check valve traps the liquid in the chamber. The liquid is released from the chamber by depressing a push button device, which action uncovers a port in an outlet conduit permitting liquid to flow from the chamber through the conduit and out through a flow connected nozzle in response to the responsor-urged piston moving down through the liquid in the chamber. .Iadd.

Abstract: A liquid dispensing pump in the form of a trigger sprayer includes a thimble-shaped valving element containing inlet and outlet valves, and located within a cylindrical portion of the pump body. In one embodiment, a pressure accumulation chamber is defined between the pump body and the valving element, and a pump piston operates within the valving element and defines therewith a pump chamber in open communication with the accumulation chamber via spaced, flexible and extendable straps which interconnect the inlet and outlet valves for permitting a portion of the valving element to move axially into a discharge valve opening position. Vent valving is effected by either the pump piston or the valving element during inward reciprocation movement of the piston. In another embodiment, the sprayer is converted into a throttle pump by the provision of a pump piston which operates within the cylindrical portion of the pump body.

Abstract: A dispenser for paste-like products comprising a preferably cylindrical container for the product to be dispensed is provided with delivery device in the form of a delivery piston (6), the surface area of which is substantially equal to the interior cross-sectional area of the container (7). Connected to this piston is a dispensing structure (2) including a value (4). The delivery piston is disposed within the upper end portion of the container and is designed for manual operation.