Abstract: A dispensing pump implemented as modular functional unit comprises a piston body (10) having a piston section (11) and a cylinder body (20) having a cylinder section (21). The piston section (11) is slidably accommodated in the cylinder section (21). Both said elements define a pump chamber (30) together. An inlet channel (24) and an outlet channel (14) are connected via the pump chamber (30). A respective check valve (31, 32) is arranged in each of said channels (14, 24). Limiting devices (12, 22), which are adapted to be brought into engagement with one another, are provided on said piston body (10) and said cylinder body (20). In addition, a dispenser and a dispenser unit-assembly system are suggested.

Abstract: A grease dispensing gun includes a handle having a trigger device and a fitting respectively connected thereto. A connection member is connected to a top end of the handle and a first end of a barrel is rotatably engaged with an inner periphery of the connection member. A container is connected to the nozzle member. The first end of the barrel has a flange extending radially inward therefrom and a board is securely engaged with the flange. A bolt extends through the connection member and is engaged with the board.

Abstract: The invention relates to a device enabling delivery of a paste from a flexible storage barrel located in a dimensionally stable container. Product is fed to a dosing device which dispenses product under vacuum. A follow-up plate is located on the storage barrel exerting pressure thereon. An opening is located in a central position and surrounds a pressure-sealed connection between the storage barrel and an access passageway to the dosing device.

Abstract: A pump dispenser suitable for striped toothpaste, comprising a pump head [1] and a replaceable reservoir [2] for the toothpaste, in which the toothpaste is packed in radially disposed segments, and the reservoir is locked against rotation relative to the pump head.

Abstract: A set of components is provided for assembly as a non-vented dispensing package for a fluid product. A hollow body with a take-up piston is provided for holding the fluid product. The body is attached to a holding member to which is mounted a finger-operable pump that is in communication with the interior of the hollow body.

Abstract: A grease gun device includes a cock body having a piston cylinder and a slot joint. The piston cylinder also includes a seal washer opening and an outlet opening spatially disposed from the seal washer opening. A piston is reciprocatingly engaged in the piston cylinder for moving grease from the slot joint to the outlet opening, wherein a valve mechanism selectively allows grease from the piston cylinder to pass through the outlet opening. A grease supply barrel having a grease opening is engaged with the cock body to supply grease to the piston cylinder, and a sealed piston closes the other end of the grease supply barrel. A jacket is mounted about the grease barrel and connected with the cock body, wherein the diameter of an outermost periphery of the grease barrel is less than an inside diameter of the jacket, such that the grease barrel does not overlap the jacket. A rear cover engages the far end of the jacket.

Abstract: A chamber that communicates with a viscous material reservoir has a flexible resilient diaphragm which forms an exterior wall thereof. An impact mechanism, which may comprise a solenoid actuated hammer, applies a predetermined momentum to the diaphragm for rapidly metering a predetermined minute blob of the viscous material from the chamber through a nozzle. The reservoir is pressurized with gas to force the viscous material into the chamber to refill the same. The chamber is heated to control the viscosity of the material. Dispensing rates in excess of four blobs per second can be achieved. Variations in the height of the nozzle from the surface of the workpiece are not critical to uniform rapid dispensing. An alternate embodiment eliminates the diaphragm and instead rapidly retracts a nozzle relative to a fluid feed conduit to eject very small blobs of viscous material. A strain gauge detects refill of the chamber inside the nozzle and sends a signal to control refill logic circuitry.

Abstract: A grease gun includes a tubular casing having a first end, a second end, and an interior cavity defined by interior sidewalls. A pump mechanism is positioned at the first end of the casing. A piston is disposed in the interior cavity in sliding contact with the interior sidewalls. A shaft is provided having a first end secured to the piston and a second end that extends past the second end of the casing. A ratchet mechanism is positioned at the second end of the casing which engages and imparts axial movement to the shaft to move the piston toward the first end of the casing. The ratchet mechanism applies sufficient pressure to force entrapped air from the grease gun.

Abstract: A system for storing, circulating and dispensing a liquid compound is disclosed. The system comprises a vessel having an open top end and a closed bottom end, with the compound being disposed within the vessel. A movable ceiling member is positioned within the vessel, with the movable ceiling member forming a first chamber and a second chamber within the vessel, and wherein the compound is located within the first chamber and the second chamber is exposed to the atmosphere. A lifting member is provided for lifting the movable ceiling member from the vessel is also included. The system may further comprise a circulation conduit operatively attached to the movable ceiling, a drain conduit operatively associated with the bottom end of the vessel, and a pump member adapted for pumping the compound from the first chamber to the circulation conduit so that the compound is circulated within the vessel. A method of storing, circulating and dispensing a fluid compound is also disclosed.

Abstract: A postmix juice dispenser for use with a disposable juice concentrate package that includes an integral progressive cavity pump and a mixing nozzle. The dispenser can read a product I.D. label on the package to automatically change ratios as packages are switched and a low liquid level indicator in the package to both warn the operator and to then provide automatic shut-off. A controller adjusts the pump motor speed in response to signals from a water flow meter to provide excellent control of ratio, even as water pressure changes. An easy lift-out refrigeration deck is located over an ice-water bath tank capable of holding 27 pounds of ice.

Abstract: A fluid-operated dispensing device 10 includes a vessel 12 for defining a chamber 14 in which fluid is received. The vessel 12 also defines an inlet 18, a first outlet 24 and a second outlet 26. The inlet 18 has a greater cross sectional area than that of the second outlet 26. A first closure 28 is operatively arranged with respect to the inlet 18. The first closure 28 moves into an open position when pressure at the inlet 18 is greater than pressure within the chamber 14. The first closure 28 moves into a closed position when pressure within the chamber 14 is at least equal to pressure at the inlet 18. A second closure 50 is operatively arranged with respect to the second outlet 26. The second closure 50 moves into an open position when pressure within the chamber 14 is greater than pressure at the inlet 18. The second closure 50 moves into a closed position when pressure at the inlet 18 is at least equal to pressure within the chamber 14.

Abstract: A dispenser for use with a container of lotion or paste-like product to be dispensed. The dispenser comprises a body having an inlet port connectable to the container and a dispensing spout with a closure cap. The dispenser has a plunger assembly manually shiftable between an unactuated position and an actuated position and a piston shiftable by the plunger assembly between an unactuated position and an actuated position. Both the plunger assembly and the piston are biased toward their unactuated position. As the plunger assembly and piston are shifted toward their actuated positions, the spout cap is opened and the piston causes product to be dispensed through the spout. When the plunger assembly is released and it and the piston return to their unactuated positions, a suck back vacuum withdraws product back into said spout, a vacuum created by the piston draws product from the container into the dispenser and the spout is closed by the cap.

Abstract: A dispenser for dispensing together a first fluid material and a second fluid material comprising a first material chamber (1a) and a second material supply chamber (1b) for containing first and second fluid materials, and a headpiece (2) comprising a first pump chamber (24) having a first pump piston (27) and being connectable to a first discharge channel (30) and to the first material supply chamber (1a) and a second pump chamber (19) having a second pump piston (26) and being connectable to a second discharge channel (31) and to the second material supply chamber (1b), and having a coaxial arrangement.

Abstract: A device for packaging and dispensing a liquid or semi-liquid substance includes a receptacle suitable for containing the substance. The receptacle has a substance outlet orifice fitted with a pump including a valve suitable for enabling the substance to be delivered without ingress of air. The receptacle also includes a bottom wall constituted by a bag that defines a space inside the receptacle and contains the substance. The bag is capable of moving inside the receptacle in response to the substance being delivered so as to reduce the volume of the space and to ensure that the substance stored inside the receptacle does not come into contact with air. A margin at one end of the bag is fixed to the receptacle and the bag is suitable for deforming so as to reduce the space until the bag coincides substantially with the inside shape of the receptacle. The bag is made of a material that is elastically deformable.

Abstract: Rechargeable packaging for dispensing fluid substances having a bell-shaped case (1) through which passes a manual plunger (2), which has an orifice (3) providing a passage for a dispensing nozzle (30) and the open base of which is closed by a removable base (5). The interior of the case housing has a replaceable cartridge (4) comprising an inverted pot shaped container (6) with a bottom (7) that is free to move axially and the top face of which has an orifice (15) communicating with a dispensing nozzle (30) via a dispensing device (16, 32) actuated by the plunger. The container and the case have cooperating means (10, 11) for locating the cartridge in the case, the cartridge being secured in the case by its base (5).

Abstract: A dispenser is provided for the concurrent dispensing of two different fluid materials. The dispenser has a first and second supply chamber for containing the two separate fluids, and a headpiece having a first pump chamber and pump piston connected to the first supply chamber and a first discharge channel, and a second pump chamber and pump piston connected to the second supply chamber and a second discharge channel. The first and second supply chambers have a coaxial arrangement.

Abstract: An apparatus for dispensing two flowable substances in a user-selectable ratio. The dispensing apparatus includes first and second containers for receiving flowable substances. Each container has a dispensing end and a second end which initially includes a piston, which is moveable only toward the dispensing end as the substances are dispensed. The dispensing apparatus also includes a manifold member having an inlet with a pair of inlet openings for removably receiving the containers. The manifold member is internally divided into two chambers for receiving the respective flowable substances. A pump member, which is moveable with respect to the manifold chamber, having an inlet end in fluid communication with the manifold chambers is provided. A selector member with a single opening is provided in fluid communication with the outlet end of the manifold member.

Abstract: A postmix juice dispensing system for dispensing a finished beverage directly from a pliable beverage concentrate having an ice point at or near freezer temperatures, with little or no conditioning. The system preferably uses a one-piece, unitary, disposable package that includes both the concentrate container and a positive displacement metering pump. The disposable package is placed in the dispenser which automatically connects the pump to a pump motor. A mixing nozzle is connected to the metering pump and a water line is connected to the mixing nozzle. Upon pushing a load button, the dispenser automatically feeds compressed air on top of a piston in the concentrate container to force concentrate into the pump. The dispenser automatically reads an indicator on the package to set the pump speed in response to the type of concentrate in the package. The dispenser requires no cleanup or sanitization and allows rapid flavor change.

Abstract: A device for the conditioning and the distribution of pasty or liquid products comprises a casing 1 in which is located a primary chamber 3 divided in two parts by a free piston 4. This primary chamber 3 communicates with a secondary chamber 7 thanks to an aspiration channel in which is located a non-return valve 9. The secondary chamber 7 comprises a piston 16 freely sliding in this chamber and tightly connected to a push button 17 which comes out of the casing. The secondary chamber communicates by an expulsion channel having a non-return valve 12 with an expulsion hole 2 of the product. Under the action of the control piston 16, the product dose contained in the secondary chamber is expelled. When the piston 16 comes back in position a new amount of product passes from the primary chamber 3 toward the secondary chamber 7, and the non-return valve 12 prevents any intake of air inside the casing.

Abstract: This invention relates to a grease pump and in particular to one including a body portion having a main tube and a cover threadedly engaged with an end of the main tube, an adjusting device mounted with the main tube and having a throttle valve, a steel ball, a seat, a first piston, and a first Venturi tube, a resilient member disposed within the first Venturi tube, a pumping device including a second Venturi tube, a sleeve, a second piston, two oil seals, a head, a packing and a nozzle, a sealing ring mounted between the nozzle and the head, whereby the grease pump may be operated with a single hand and is especially useful in a narrow space.

Abstract: A postmix juice dispensing system for dispensing a finished beverage directly from a pliable beverage concentrate having an ice point at or near freezer temperatures, with little or no conditioning. The system preferably uses a one-piece, unitary, disposable package that includes both the concentrate container and a positive displacement metering pump. The disposable package is placed in the dispenser which automatically connects the pump to a pump motor. A mixing nozzle is connected to the metering pump and a water line is connected to the mixing nozzle. Upon pushing a load button, the dispenser automatically feeds compressed air on top of a piston in the concentrate container to force concentrate into the pump. The dispenser automatically reads an indicator on the package to set the pump speed in response to the type of concentrate in the package. The dispenser requires no cleanup or sanitization and allows rapid flavor change.

Abstract: A dual mode pistol grip grease gun that operates in either the volume mode or the pressure mode. The grease gun comprises a cylinder head, which has a handle fixed to it. Attached to the handle via a shiftable link is a lever, which has a U-shaped slot disposed at one end. The shiftable link is disposed in the U-shaped slot of the lever, and its position therein defines whether the grease gun is in the volume or the pressure mode. Rotatably attached to the lever is a piston, which enters the cylinder head when the lever is depressed. A stop disposed in the lever that rests against the piston keeps the span between the lever and the handle the same for both the volume and pressure modes.

Abstract: A dental composition, such as a paste or gel dentifrice containing triclosan, as an antibacterial agent which acts to decrease plaque on the teeth, and polyphosphate for anti-tartar actions, is packaged in a finger actuatable pump-type plastic dispensing container which is made of or includes a solid polymeric material, such as a polyfluoroethylene, which is compatible with triclosan, so that excessive loss of its anti-plaque activity on storage is avoided, which losses have been noted when various other plastics have been employed as dispensing container component materials. Alternatively, others of such plastic may be employed for dispensing container parts when a stabilizer, such as a terpene, e.g., limonene, is present in the dentifrice.

Abstract: An auto-pull follower is provided for use in a grease gun of the type having a grease reservoir with a piston mounted for reciprocating movement in the reservoir. The reciprocating piston is provided with a novel auto-pull mechanism comprising a spring biased spool mounted for rotation on the piston, and a flexible cord or chain extending from the spool and out of the reservoir through a hole in a rearward end wall of the reservoir. Pulling the end of the cord outside the reservoir causes the spool to rotate against the bias of the spool spring and causes a length of cord to be unwound from the spool. After unwinding the length of cord from the spool, continued pulling of the cord from the reservoir end wall causes the piston to move against the bias of a piston spring in a direction towards the reservoir end wall. The movement of the piston toward the end wall increases the interior volume of the reservoir and enables the loading of grease into the reservoir interior.

Abstract: A viscous fluid dispenser is provided including a housing enclosing a pressurizable viscous fluid reservoir connected to a collapsible measuring chamber. A valve is connected therebetween and can be activated to fill the chamber on demand. The dispenser will discharge a premeasured quantity of fluid either proximally or remotely and direct dispensing of unmeasured quantities without modification.

Abstract: A piston-type multi-station rotary filling machine having improved reliability and consistency of operation. The filling machine includes a nozzle assembly for a filler with a product port which includes a nozzle body with a rectangular nozzle that intersects the product port. A plunger having a complementary rectangular cross-section and with a knife edge on the side adjacent to the port is reciprocably mounted within the nozzle. The knife edge cleanly cuts tough food products to facilitate accurate dispensing of the food products.

Abstract: A pasty product dispenser (1) comprising a body defining a chamber for storing at least one main pasty product and pumping system defined by a wall surmounting the storage chamber and by an intake valve member, the wall carrying on the side of the storage chamber a separator tube enclosing the valve member and comprising passages for at least one secondary pasty product contained between the separator tube and the body, the passages being outside the separator tube, the wall having a rotating cover with traversing apertures, rotation of the cover progressively masks or exposes the passages, the apertures being occluded by the valve member when it is in its low position.

Abstract: An attachment for use with a grease gun receives grease under pressure therefrom in a reservoir, and at least three, outwardly projecting, circumferentially spaced nozzles are carried by the attachment uniformly dispensing grease into and supporting a hub upon a spindle.

Abstract: An insert adapter is provided for use with a grease gun having a dispensing barrel, a pump housing, and a grease supply casing of the type that is either packed with grease in bulk or receives an open ended grease cartridge. The insert adapter adapts the grease gun to receive a bellows type grease cartridge having a threaded dispensing outlet at one end. The adapter comprises a circular cone shaped body with a threaded connector socket at its center. The periphery of the cone shaped body fits securely in the interior of the grease gun pump housing, and the threaded connector socket securely receives the threaded outlet of the bellows grease cartridge, thereby adapting the grease gun to receive and be supplied by a bellows type grease cartridge.

Abstract: A dispenser of the type having an elongated reservoir for storing toothpaste or other fluent material, an outlet nozzle at one end of the reservoir, and a one-way piston at the other end of the reservoir in contact with the fluent material, the one-way piston comprising a body portion having a top surface for contacting material in the reservoir, a flexible annular sealing member for sealingly engaging the inner wall of the reservoir, and one or more air-venting passages for permitting air trapped between the fluent material in the reservoir and the piston to be vented to the atmosphere as the piston is inserted into the dispenser and into contact with the material.

Abstract: A dispenser for pasty products such as toothpaste, the dispenser having a discharge nozzle and a closure member for the nozzle, the closure member and the nozzle being automatically moved away from each other during a dispensing operation and returned to closed position upon cessation of a dispensing operation. The closure member is combined with an insert for producing a striped product.

Abstract: A distributor for pasty products having a sliding piston and a distribution head. The distribution head has a tubular, deformable pumping member, an actuator acting on the pumping member and an expelling valve. An upper end of an upper tube of the pumping member forms an annual end edge. The expelling valve has a flexible disk with a periphery kept in engagement with the end edge of the tube by a central bearing member of the disk. The bearing member is connected to the actuator, the flexible disk and the end edge of the tube.

Abstract: A dispensing device for dispensing at least two flowable substances includes a container with two separate coaxial compartments for containing two flowable substances, respectively. Independently operable dosing units are associated with each compartment. Each dosing unit communicates with its associated compartment through a valve flap. Each dosing unit also includes a spring-actuated plunger guided in a cylinder, with a valving mechanism for enabling a predetermined quantity of the associated flowable substance to be selectively dispensed.

Abstract: A dispenser for paste-like materials is described which has a cover that automatically seals the dispenser's spout when no material is pumped therefrom thereby protecting the spout and its immediate surroundings from ambient air. The cover automatically unseals the spout while material is being dispensed. The dispenser includes (1) a housing, (2) a reservoir or replaceable cartridge for storing paste-like material, (3) a pump for causing the flow of a controlled quantity of material from the reservoir or cartridge, through a channel and its discharge from the spout and (4) an integrated, rotatable cover containing a sealing cap for the spout and a plunger for activating the pump. The sealing cap and plunger move in concert with each other so that material is pumped from the spout after the sealing cap moves away from the spout.

Abstract: An attachment for bleeding trapped air from hand-operated grease guns consists of an in-line valve for disposition between the gun and its output tube. The valve features an in-line fitting on which is threaded a hand-operated nut. When the nut is backed-off it opens a port in the fitting through which trapped air can be bled off.

Abstract: A viscous fluid dispenser having a significant decrease in the number of parts constituting the dispenser and thus having a simplified structure which can be easily assembled and which can function satisfactorily is provided. A first embodiment of the dispenser includes only five parts: a cylindrical body integrally formed with a top plate, a movable bottom lid slidably fitted in a lower end of the cylindrical body, a piston slidably fitted in a cylinder of the top plate and having a discharge pipe, a push button having a discharge nozzle connected to the discharge pipe, and a spring for upwardly forcing the push button and piston. A first check valve for operating a suction hole of the top plate is integrally formed in the top plate, and a second check valve for operating the discharge pipe is integrally formed in the piston.

Abstract: An apparatus for melting and dispensing rapidly degradable reactive adhesive such as moisture curable hot melt adhesive from a thermally conductive, sealed container includes a housing within which the container is supported in a position to engage a heated surface of a platen. The platen is mounted within the housing in fluid communication with a heated manifold carrying a gear pump. The platen melts the adhesive within the container and provides for the transfer of heat uniformly throughout the stream of melted adhesive discharged through the outlet of the container. The melted adhesive is transmitted from the platen into the gear pump in the manifold which is thermally isolated from the platen to maintain the adhesive therein at a substantially constant temperature.

Abstract: A two-chamber viscous product dispenser has an internal valve element which includes integral inlet and outlet check valves for the valving of product into the pump chamber and from the pump chamber through a stationary spout. The outlet valve may be in the form of a flap valve having resilient webs for spring biasing the valve to its closed position. Otherwise, the outlet valve may be plate like capable of deforming when opening.

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: 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: Apparatus for dispensing a desired quantity by weight of a fluid material such as a liquid color printing ink for shade mixing purposes includes a container (1) for the fluid material to be dispensed, a main fluid material dispensing discharge outlet (2) on the container (1) and a secondary fluid material dispensing discharge outlet (3) on the container (1). The container further includes a movable pressure assembly plate to apply a pressure to the fluid to dispense the fluid from the discharge outlets. The secondary dispensing dischage outlet (3) incorporates a gear pump (5) which is adjustably operable to dispense a particular volume of fluid material corresponding to a particular weight of fluid material to be dispensed. The pressure plate assembly (4) includes a presser plate (21) slidably movable in the container (1) in sealed contact with side walls (1a) of the container (1) to engage directly or indirectly the upper surface of fluid material in the container (1).

Abstract: A dispenser for paste-like products consists of a dispensing head (1) and a cartridge (2) containing the paste-like product. The cartridge has its lower end closed by a follower piston slideable along the interior wall surface of the cartridge under action of the exterior atmosphere. In the dispensing head, a pumping device with a pump chamber is provided. An inlet-check valve is provided for prevention of backflow of paste-like material entering the pump chamber through a passage from the interior of the cartridge. At least one part of the inlet-check valve, for instance, a valve seat thereof or, for instance, all parts of the inlet-check valve, namely, a valve seat and a closure member, are provided on an upper cover wall of the cartridge as part of the cartridge. The cartridge is releasably connectable to the dispensing head. After exhaustion of its contents, the cartridge may be detached from the dispensing head and replaced by a filled cartridge.

Abstract: A residual quantity filler is described in which a cylindrical filling tube is used in place of a filling funnel, with a lid arrangement being provided in the filling tube and with the lid arrangement moving during the dispensing step with the dispensed material as a result of the differential pressure between the atmosphere and the vacuum prevailing at inside the filling tube, thus ensuring that the entire residual quantity can be continuously and completely processed.

Abstract: A grease gun has a grease container with a low pressure piston, and a high ressure part with a high pressure piston in a passage. The high pressure part is located on a cap screwed to the grease container. The high pressure part is connected through a hole with the interior of the grease container and has an outlet nozzle extending perpendicularly to the high pressure piston and having a passage and a valve. A hand lever is journalled to the high pressure piston and mounted on a pivoting link joining it to the high pressure part. The high pressure part and the outlet nozzle are made as an integral one piece component bend of round steel stock pressed and bent into an L-shape into which the necessary passages are formed after the bending and pressing. These passages may be formed also by pressing, or drilling, or the like.

Abstract: A pump dispenser for fluent products is disclosed as inluding a container for housing the fluent product, dispensing outlet means on the container, a follower piston closing the lower end of the container below the product, and means for varying the volume within such dispenser. The volume varying means comprises a plunger adapted to be reciprocated within the dispenser to alternately decrease the volume therewithin and, following such decrease, return to its original position thereby increasing the volume within the dispenser. The plunger further comprises a peripheral skirt having predetermined outer lateral dimensions at its lower distal end, and an enlarged attachment head on such lower distal end. The attachment head has predetermined outer lateral dimensions which are larger than the outer lateral dimensions of such lower distal end therey effectively forming a reentrant portion on the plunger above the enlarged head.

Abstract: A hand lever operated grease gun that has both high pressure and high volume modes by changing the mechanical advantage of the lever acting on a dispensing piston. A spring biased pivotal connection between the lever and a forwardly mounted supporting link is shiftable between two positions by depression of the lever against the biasing force of the spring.

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 polymeric grease gun comprising a tubular body of polymeric material which defines a chamber for containing grease, a forward end cap having a grease pump, pump lever and a nozzle, a polymeric rear end cap, and a plunger for urging grease forward into the chamber, where the end caps are secured to the tubular body by means of lugs at each end of the tube which engage blind-ended arcuate slots in the leading edge of the end caps so that the caps are retained on the body against an internal axial force which tends to separate the caps from the body. The caps are also secured on the tubular body by means of springing members extending from the ends of the tubular body which engage corresponding portions of the end caps so that the springing members are resiliently held against the interior of the caps.

Abstract: A practically all plastic lever operated grease gun with a flexible plastic link integrally molded with a plastic head, pivotally connecting the lever to the head. A lever reciprocated dispensing piston, slidably mounted in a transverse bore in the head, actually forms the bore in the head as a core pin during head molding.

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.