Abstract: A mounting cap is disclosed for a container having a shoulder extending to a neck, a neck extending to a flange, an aperture surrounded by the flange, and a pump extending through the aperture, the pump terminating in an actuator button. The mounting cap comprises a cover and a sleeve, the sleeve extending from the cover and surrounding the flange and neck, and also means for mounting the sleeve to the container. In one modification, the mounting cap further comprises a collar extending upward and surrounding the pump. Also disclosed is a method for mounting such a cap onto the container.

Abstract: Apparatus for dispensing fluids comprising a container, a cap for the container, a first cylinder integral with the cap having a portion within the container and a portion outside the container, a spout assembly attached to the latter portion of the first cylinder, a coaxial second cylinder disposed around the lower exterior portion of the first cylinder, reed valves coaxially disposed in the lower portions of each cylinder, and means to move the second cylinder upwardly relative to the first cylinder.

Abstract: A manual liquid dispenser which has a mounting member (1) engaged fixedly with a guide cylinder (11) from the inner surface of the upper end thereof, depending from a neck portion (4) into a container (3) and engaging cylinder (8) stood upwardly therefrom, a spraying head (24) capable of being depressed and formed with a valve seat (19) of a discharge valve (18) and a valve port (20) at the center thereof on the back surface thereof, a rod member (24) slidably contacted with the inner surface of the guide cylinder (11), and a returning coiled spring (27) for always upwardly lifting the spraying head (14) through the rod member (24) and seating the valve body (25) on a valve seat (19) to close the discharge valve (18), and a communication tubular member (28).

Abstract: This disclosure is directed to a method and combined apparatus for converting or translating the immense potential energy of the deep sea water into useful work by providing a jointly enclosed environment in a column or mass of a fluid in which a container or vessel is maintained under a pressure which is less than that of the pressure exerted by the deep sea water. The apparatus consists of two, in all respects entirely independent, machines with individual performances and with entirely separated energy consumptions operatively connected to achieve the end result.A fluid activated work producing machine is disposed so as to be actuated by the continuous differential in pressure between the pressure exerted by the continuous deep sea water and the low pressure of the environment in an associated container or vessel.

Abstract: The invention provides a composite carbon or graphite having desirable properties such as corrosion and wear resistance. The invention combines a graphite substrate with a protective porous zone of silicon carbide. The whole body of graphite plus silicon carbide then is infiltrated with aluminum phosphate. An adhered barrier of silicon carbide, ranging in thickness between 0.015 and 0.050 inch thick is integrated with a graphite stratum to form a very hard surface, resistant to mechanical and chemical wear. The silicon carbide barrier is closely compatible to the graphite substrate, in resistance to thermal shock and in qualities of thermal expansion. In order to improve oxidation resistance further, a new composition was formed by infiltrating aluminum phosphate through the silicon carbide into the graphite to form a single body of composite graphite.

Abstract: A pump for dispensing liquid from a container is disclosed and comprised a cylinder, and a piston having an interior chamber with a valve member disposed therein, the valve member having a cylindrical surface at one end portion thereof. An inlet valve is provided and includes a sleeve having a cylindrical surface having a diameter sized to frictionally engage, provide a liquid seal and slide with respect to the cylindrical surface of the valve member. The inlet valve sleeve seats upon an annular ring extending around the inlet opening of the cylinder and seals the interior chamber of the pump with respect to the container. In accordance with an aspect of the invention, the pump may be non-venting such that a vacuum builds in the container as liquid is dispensed, and a sealing collar is provided to seal the pump with respect to the container.

Abstract: A hydraulic pump unit, comprising an electric motor, the stator (5) of wh is disposed in a housing defining an oil reservoir and the rotor of which is mounted on a shaft which drives a hydraulic pump. Each front end of said stator is associated with an end shield for a shaft bearing. A pump element or the pump is secured to at least one end shield. Elongated connecting members which are distributed about said shaft in the circumferential direction support said end shields. The connecting members are designed as rods (17), abut against the outer circumference (7) of said stator (5) and, in the undeformed state, guide said stator in a close sliding fit. At least one tightening strap (19) encompasses said rods (17) and the outer stator circumference (7) for deforming said rods (17) until said stator is fixed in position and for pressing said rods against the stator circumference. A means for preventing rotation can be provided between said stator and said rods or said tightening strap.

Abstract: A device for emptying a recipient containing a product of high viscosity, comprising an arrangement for introducing a plate, whose dimensions correspond substantially to those of the opening of the recipient, into the recipient, a pump for withdrawing this product, fast with the plate and having a withdrawal zone opening out on the frontal face of the plate in contact with the product, as well as an adjustable device for heating and cooling the plate. The said plate comprises a scraper system disposed in the vicinity of the frontal face, the scraper system being set in motion by a drive system so as to bring the product adjacent the frontal face towards the withdrawal zone of the pump.

Abstract: A manual liquid dispenser which has a mounting member (1) engaged fixedly with a guide cylinder (11) from the inner surface of the upper end thereof, depending from a neck portion (4) into a container (3) and engaging cylinder (8) stood upwardly therefrom, a spraying head (24) capable of being depressed and formed with a valve seat (19) of a discharge valve (18) and a valve port (20) at the center thereof on the back surface thereof, a rod member (24) slidably contacted with the inner surface of the guide cylinder (11), and a returning coiled spring (27) for always upwardly lifting the spraying head (14) through the rod member (24) and seating the valve body (25) on a valve seat (19) to close the discharge valve (18), and a communication tubular member (28).

Abstract: Containers, particularly insulated containers are disclosed consisting essentially of a container body filled with a pump mechanism and featuring a flexible bell shaped member, immersed in liquid and equipped with disc valve. This bell shaped member is compressed whenever the actuating button is pressed, thereby forcing the liquid contents of the container to flow out through the pipe up to the pouring spout. A flexible tube is automatically squeezed shut when the bottom returns to its uppermost position.

Abstract: A closed pumping system for containing and dispensing liquids such as liquid chemicals and the like. The system has a pump that is an integral part of the container and a driving mechanism for the pump which is detachable from the pump to be used again with subsequent containers. The container with the pump thereon may be disposed of.

Abstract: A dispensing pump is adapted for pressure filling and includes a fluid filling passage which remains sealingly closed during pumping operation by the provision of an annular valve skirt in sealing engagement with a wall of the fluid filling passage, such skirt inwardly flexing during charging the container permitting the charged fluids to by-pass the valve and enter the container. The valve skirt depends from either the plunger head or from the plunger. When depending from the plunger, the valve skirt functions as a guide element for the plunger head together with a plunger head retention bead which cooperates with a pump body retention bead in limiting the upward movement of the plunger head to a predetermined extent. These guide members serve to isolate the plunger against the influence of lateral or eccentric forces applied against the plunger head during its reciprocation.

Abstract: Liquid atomizer having a reciprocable pump. The atomizer provides a reliable sealing of the piston rod of the pump with lowered requirements as to the manufacturing tolerances of parts, a simplified manner of venting, and the sealing of the atomizer against leakage when the atomizer is placed in any arbitrary rest position. A sleeve having a smaller inner diameter than the cylinder is mounted on the upper part of the cylinder of the pump and its upper part is in contact with the inner part of a neck of a housing for the atomizer. A free space between the inner wall of the housing and the outer wall of the cylinder of the pump is connected below with the interior of the bottle on which the atomizer is mounted, and the upper part of the free space communicates with the surface of a tube by radial channels passing through the sleeve of the cylinder.

Abstract: A decanter and sanitary pump assembly for dispensing metered quantities of liquid. The pump assembly is mounted inside the decanter, and the entire apparatus is quickly and easily disassembled for cleaning, thus making it particularly useful for dispensing food products. The outlet of the pump assembly projects downwardly from an overhanging section of the decanter to allow convenient placing of a liquid receiving container beneath the outlet.

Abstract: An air-operated diaphragm pump assembly for withdrawing small volumes of liquid from a receptacle until the receptacle is almost completely emptied. The pump assembly includes a diaphragm pump that is submerged within the liquid in one receptacle, an extension sleeve extending upwardly from the pump to a position above the receptacle, fluid logic circuitry to operate the pump, inlet conduit(s) passing through the sleeve to transmit control pulses to the pump, and outlet conduit(s) passing through the sleeve to discharge the liquid forced out of the pump in response to the control pulses. The fluid logic circuitry includes a pneumatic Schmitt-Trigger that is operatively associated with a pneumatic inverter. The diaphragm pump includes a pumping diaphragm and a driving diaphragm, the diaphragms being coupled together to drive a displacer within a pumping chamber in response to a pressure differential to thereby expel the liquid contained therein.

Abstract: Disclosed is a battery-operated utensil for mixing and pouring drinks and the like. It uses a separate motor to drive a shaft carrying mixer blades, and a separate motor to drive a pump. The motors are turned on one at a time, and drive the respective shafts directly, thus eliminating the use of components such as gears, clutches or ratchets. The design allows ingredients to be poured into the mixing vessel through a filling chute, without removing the housing which caps the vessel, as well as for convenient removal of the housing when necessary, as for cleaning. Various other features are provided to make the utensil particularly inexpensive to manufacture and convenient to use.

Abstract: An easily operable liquid dispenser has a tamper-proof lid, a pressuring system that allows the dispenser to be operated either by a foot pump or by hand, and a control system that allows the amount of liquid dispensed by the dispenser to be varied.

Abstract: A reciprocating pump for delivering cutting fluid to the machining situs between a tool and a workpiece includes a collapsible piston which forms a substantial seal in the pump during the power stroke and then collapses during the relaxation stroke to allow the piston to reassume its initial position in preparation for the next power stroke. The pump includes an indexer and switch which maintain the pump in an operative condition, thereby delivering cutting fluid to the machining situs for a predetermined amount of displacement between the tool and workpiece prior to engagement and subsequent thereto. The indexer and switch exploit a predetermined amount of play in the switch to maintain the pump in an operative condition for the desired time.

Abstract: A manual type miniature atomizer having a container for liquid to be atomized, and further having mounting means, a main cylindrical member, a hollow tubular member, a spring, an atomizing head, and an outer cylindrical member. The mounting means is detachably engaged with the neck of the container. The main cylindrical member depends from the flange of the mounting means into the container. The hollow tubular member is elevationally movably engaged at the lower end within the small-diameter portion of the hollow tubular member. The spring urges upwardly the tubular member. When the atomizing head is manually depressed in operation, the interior space in the small-diameter cylinder is reduced and hence the interiors of both the small-diameter and the large-diameter cylinders are simultaneously pressurized.

Abstract: A windshield washer fluid supply comprising a bracket adapted to hold a conventional windshield washer solvent container in which the solvent is originally purchased. The invention also includes a plug which can be secured to the mouth of the solvent container which holds a tube extending into the solvent container and connected to the inlet of a fluid pump. The stopper permits use with solvent containers having different mouths and enables the container to be used with a submersible pump appropriately sized to fit within the container or used with a preexisting external fluid pump.

Abstract: An improved isothermal jug-like container is shown which is well adapted to the coupling of a pouring pump. The pump is installed asymmetrically so that the pump spout, when in the pouring position, projects itself outwards. The entire pump is protected by the handle when the spout is in the "closed" position.

Abstract: A hopper or container for containing drywall joint compound or "mud" used in the "taping and floating" of seams between drywall panels, which hopper includes a shaped metal tank which tapers to define a closed funnel at the bottom, and a pump support projecting from the tank near the bottom, with a pump access opening in the pump support to receive a filler pump for pumping the joint compound from the tank on demand. The hopper can be fitted with wheels to better facilitate mobility, and is provided with a hinged lid fitted with a gasket, for loading the joint compound into the tank and maintaining a tight seal between the closed lid and the top of the hopper.

Abstract: An accumulative pressure pump that has upper and lower pressure chambers of different diameters, each of which is provided with a piston having a connected stem. A third seal piston is provided between the upper and the lower piston. Inlet and outlet check valves are provided. The outlet valve opens on accumulation of pressure on the downward stroke of the two pistons. The lower portion of the inner sidewall of the lower chamber is provided with a rib or a recess to permit any air trapped in the two chambers to be expelled through a bottom opening that is provided in the lower chamber. The dip tube is connected directly to the second piston and has its end abutting or adjacent the bottom of the container and is reciprocal with the second piston whereby its lower end moves into the lowermost portion of the container to permit substantial removal of the entire contents of the container.

Abstract: The invention relates to a pump applicable to containers holding a substance to be delivered or dispensed under pressure, which pump is manually operable. The pump includes a hollow stem movable within a hollow body, urged out of the latter by a spring and retained therein by a ring sealingly connectable or hookable on a ring nut which can be secured on the mouth or inlet member of a substance container. A seal of H-cross-section is mounted and movable on the stem and by its lips seals on the inner surface of the hollow body, on the outer surface of the stem, on a tubular extension projecting from the above mentioned ring, and respectively in either of two annular grooves presented by the stem or bodies associated therewith. On moving between such grooves during the movement of the stem, the seal closes or clears a channel through which the pressure substance can exit as previously sucked within the hollow body, which bears on the outward facing surface of an annular edge projecting from the ring nut.

Abstract: A mechanical device is described consisting essentially of an upper body and a flexible bell shaped member, immersed in liquid and equipped with disc valve, placed in a housing on the lower part of the bell shaped member, that is fitted in a rigid reinforcing ring. This bell shaped member compressed by the activating flange of the transferring pipe, whenever the actuating button is pressed, makes the liquid flow out through the pipe up to the pouring spout. When turning the outer cover of the upper body, the system is locked, sealing the pouring spout and may be unlocked when ready to use.

Abstract: The collar of the pump clamps the top wall of a closure against an underlying, external flange on the pump body, and although the collar is always a fixed, predetermined distance from the flange, a variety of closures with differing top wall thicknesses may be accommodated by the collar because of the yieldable nature of an integrally depending element at a lower periphery of the collar that makes the actual clamping engagement of the collar with the closure. Such element may be defined by an annular series of separate, deflectable segments around the periphery of the collar or by a continuous annular surface capable of deflecting away from the lip but maintaining forcible engagement with the top wall of the closure at all times.

Abstract: In order to effect the opening and closing operations of a control valve leading to a nozzle, an actuating chamber is defined by a piston and a cylinder and is made to have communication with the pressurizing chamber of the pressurizing means of an atomizer. In order to regulate the movement of the piston, the actuating chamber has its lower portion formed with a stopper for preventing the substantial volume of the pressurizing chamber from being abruptly increased. The stopper has its lower portion formed with a depending cylinder for guiding the downward movement of the aforementioned piston.

Abstract: An apparatus for supplying polishing and/or cooling liquid, including a storage container preferably removably supported on a supporting frame, a downwardly facing dished cover for the container pivotally mounted on the frame by a hinge joint assembly and having a bent-over edge whose outer peripheral dimension is slightly smaller than the corresponding inside peripheral dimension of the upper edge of the container to provide a clearance gap therebetween, with the cover supporting thereon various elements such as a discharge pipe and a pump assembly for conveying liquid from the container as well as a mechanism for varying the temperature of the liquid, and stops on the cover and hinge joint assembly, respectively, for determining the range of movement of the cover between closed and open positions relative to the container.

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 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 cartridge-type pump particularly adapted for aircraft or rotorcraft fuel systems incorporates a pump housing which is mounted in a wall of the fuel tank, which housing defines a cartridge pump cavity and a fuel inlet and a fuel outlet. A cartridge-type pump is received in the pump cavity with ports which communicate with the inlet and the outlet. The inlet is provided with an inlet valve which is normally biased to the closed position and is retained in the open position when the pump cartridge is seated in the pump housing so that upon removal of the cartridge, the inlet is automatically closed preventing loss of fuel from the tank. The cartridge is provided with a handle which, in a stored position, operates the inlet valve and which also serves to cam or lift the cartridge out of its seated position and which also operates to cam or force the cartridge into a seated position when the cartridge is being re-installed.

Abstract: A cylinder in which a liquid pressurizing chamber is formed is inserted into a liquid container. The cylinder has an unitary large-diameter portion and a small-diameter portion. A first piston is slidably received by the large-diameter portion of the cylinder. The cylinder also slidably receives an operation body including a second piston slidably in the large-diameter portion and a third piston slidably in the small-diameter portion. The liquid in the pressurizing chamber defined by the cylinder and the pistons is pressurized as the operation body is depressed overcoming a force of a spring. A stop valve mounted on the second piston is opened in response to the pressure generated in the pressurizing chamber, so that the liquid is allowed to reach, through a passage formed in the first piston, a nozzle for atomizing the liquid.

Abstract: An accumulative pressure pump that has upper and lower pressure chambers of different diameters, each of which is provided with a piston having a connected stem. Inlet and outlet check valves are provided. The outlet valve opens on accumulation of pressure on the downward stroke of the two pistons. The lower portion of the inner sidewall of the lower chamber is provided with a rib or a recess to permit any air trapped in the two chambers to be expelled through a bottom opening that is provided in the lower chamber. The dip tube is connected directly to the second piston and has its end abutting or adjacent the bottom of the container and is reciprocal with the second piston whereby its lower end moves into the lowermost portion of the container to permit substantial removal of the entire contents of the container.

Abstract: A miniature type, invertible atomizing spray mechanism includes a receptacle for liquid to be atomized, and further includes at least one pressure chamber, which depends within the receptacle and is arranged to have received therein a piston with which a reciprocable spray head is arranged to cooperate. Beneath the pressure chamber is disposed a valve member which is adapted to control the suction of the liquid into the pressure chamber. The valve member opens an inlet of the pressure chamber by the reciprocal movement of the spray head. The inlet of the pressure chamber is in fluid communication with a passage leading to a three-way valve. The three-way valve includes upper and lower valving assembly which communicate with a passage extending to the cylinder of the atomizer, each of the valving assembly being in communication with the bottom of the receptacle as well as an area adjacent to the neck portion of the atomizer through elongated tubular elements.

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 pressurized dispenser including a container, a mounting cup having a central opening therein, said mounting cup attached to said container, a dispensing means comprising a body member forming a tank and having an open top portion with a dispensing stem projecting therefrom through said central opening in said mounting cup, said body retained in said mounting cup, and a diaphragm interposed between said body and said mounting cup, sealing around said projecting stem at least when said stem is in an unoperated position, a passageway is formed in the body extending across the top of said body and through the body, the passage in communication with the tank in the area below the diaphragm, an annular gasket is interposed between the mounting cup and container, the gasket having an opening with the same profile as the outside of the body disposed so as to seal against the body to interrupt communication between the passageway and container, so that, during pressure filling, when pressure medium is supplied to th

Abstract: A portable fuel and oil dispenser for servicing chain saws and other portable engine driven equipment, includes a compact carrier for side-by-side containers holding different fluids such as fuel and oil. Pump assemblies which effect fluid transfer during an upstroke thereof and have features causing a straight line lifting of a pump piston rod extend into each of the containers for fluid transfer therefrom and respectively include leak protection features such as relief ports for backflow of fluid from the pump assembly into the container when fluid transfer is not required. Flexible delivery conduits such as hoses are connected to the pump assemblies for dispensing the fluids and remote ends thereof have nozzles with a check valve at an extreme tip end to prevent seepage and dripping of the fluid from the nozzle. Further, to prevent inadvertent operation of the pump assemblies, handles therefor are foldable and collapse downwardly and out of the way against the containers.

Abstract: Apparatus for safely dispensing flammable liquids from containers. A reciprocating piston, slidingly positioned within a cylinder, draws flammable liquid from a sealed drum and dispenses the liquid from a spout member extending from the apparatus. A flame-arresting device operably positioned within the apparatus disperses any flame advancing into the cylinder. A dip tube extends from the apparatus into the flammable liquid within the drum. In a preferred embodiment of the invention, the reciprocating piston dispenses flammable liquids on the upstroke only, thus preventing accidental or inadvertent discharge of the liquid.

Abstract: The pumping element and the electric motor are disposed inside a sealed container formed by a tank covered with a lid. The fixing this lid on the body of the tank ensures automatically the assembling of the motor with the pumping element, as well as the fixing of the supply terminals of the motor and the connection pipes to the suction and delivery orifices of the pumping element, which are placed at the upper part of the tank.

Abstract: An apparatus for supplying molten bituminous material to an elevated level in which the molten bituminous material is pumped by a pump through a valve and up an upstanding supply pipe to the elevated level the supply pipe is in communication through two ports of the valve with the interior of the vat for free draining under gravity of the body of bituminous material from the supply pipe back to the vat when the supply of molten bituminous material to the elevated level is discontinued. While the supply of molten bituminous material to the elevated level is discontinued the bituminous material is pumped through two further ports of the valve for recycling back into the vat, preferably at an end of the vat remote from the pump inlet in order to ensure substantially complete circulation of the molten bituminous material within the vat.

Abstract: A liquid dispenser adapted to fit over the open top of a container has a pump plunger connected by valving between a depending inlet and an outlet for pumping liquid from the container and a limitedly movable gauge rod is disposed in spaced parallel relation to the plunger with means securing the plunger and rod together in adjustable longitudinal relation to thereby adjustably fix the plunger stroke for metering fluid dispensed per stroke of the plunger.

Abstract: A triple seal valve member for an atomizing pump dispenser which includes an integrally molded plastic valve member having an outer portion terminating in a sealing tip for sealing against an axial outlet port, the outer part being of a first cross section; an inner part containing therein a hollow recess open at its inner end for accepting a biasing spring, the inner part of a larger cross section than the outer part, the radially outer portion of the inner part adapted to seal against an opening at the inner end of a pump chamber; an intermediate portion forming a generally cylindrical recess between the inner and outer portions, the recess in communication with the hollow recess in the inner portion; a narrowed throat formed at the area of communication between the hollow recess and the cylindrical recess; said intermediate portion having openings therein in the vicinity of its outer end permitting communication between the cylindrical recess and the area above the said inner portion; with a ball having a

Abstract: An improved liquid dispenser has two concentrically spaced cylinders with a pump plunger fitting the inner cylinder, an inlet check valve at the bottom of the outer cylinder, and an outlet check valve adjacent the top of the outer cylinder with a graduated stem extending upwardly from the plunger through a cap structure adapted to engage the open top of a liquid container. The pump plunger is restrained from moving upwardly out of the inner cylinder and a collar is adjustably mounted on the stem above the cap for setting the pump stroke as indicated by the graduations on the stem to thus provide a dispenser adapted to fit containers having a small opening therein.

Abstract: A container for storing and dispensing a liquid product includes a pump operated by a reciprocable control member and associated with a pneumatic servo system. The actuation is achieved by supply of gas pressure, for example, from a reservoir of gas at a pressure of the order of 5 bars, and this is used to actuate the control member of the pump, for example a stepped piston incorporating a pressure multiplying effect. Much higher operating forces on the reciprocable control member can be achieved with this system than were possible by purely manual operation of the valve control member.

Abstract: A manually charged fluid dispenser includes a charging cylinder disposed in the mouth of a bottle and a manually reciprocable piston carried on a charging rod which extends out each end of the cylinder. The charging rod has a differential diameter for providing hydraulic return thereof by fluid pressure in the charging tube after manual charging of the tube. The charging tube is in fluid communication with a spray nozzle mounted on the bottle and tube through a ball valve which is selectively unseatable by a cam actuated by a slidable trigger, which is hydraulically biased by a piston which is in connection with pressurized fluid at the ball valve. An alternative embodiment of the charging cylinder provides a charging rod slidable in a draw tube disposed above an end of a charging cylinder and a piston slidable therein so that fluid pressure in the cylinder will return the rod to its rest position.

Abstract: A dispensing pump of the pressure build-up variety includes a cylinder defining a variable volume pump chamber, and a main piston reciprocable therein, the piston having a valve seat thereon communicating with a discharge passage leading to a discharge nozzle. A valve member having a smaller diameter piston thereon is moved during pressure build-up away from the seat for opening the discharge passage. The smaller diameter piston has a flexible peripheral wall which is deformed inwardly at the commencement of the piston downstroke for closing a flow passage in the smaller diameter piston and thereby interrupting communication between the inlet and the pump chamber, such flow passage being open upon outward movement of such peripheral wall at the end of the piston upstroke. At the top of the cylinder along which the smaller diameter piston moves is a relieved section effecting the opening of the flow passage in an inoperative condition of the pump.

Abstract: A sprayer designed usable in both erect and inverted states and a pump mechanism therefor, comprising a pressure chamber consisting of a cylinder and a piston, a pair of check valves provided in opposition to each other below said pressure chamber, a liquid inlet hole allowing flow of the liquid in the liquid container from its neck side portion into said pressure chamber when the sprayer is brought to its inverted position, and a skirt member adapted to inhibit leakage of the liquid to the spray head from said liquid inlet hole when the sprayer is in its inverted position. Inflow of the liquid and air into the pressure chamber is perfectly inhibited by the two check valves when the sprayer is either in its erect position or in its inverted position.

Abstract: A liquid-gas pumping apparatus includes an immersion pump and motor unit vertically slidable within a housing extending into a cryogenic liquid storage tank, a plurality of valves opened by engagement with the pump and motor unit are circumferentially spaced adjacent the bottom of the housing with one of the valves adapted to be opened before the other valves and permanent electrical supply contacts extending through the housing to be engaged by contacts on the pump and motor unit.

Abstract: A pump assembly for dispensing fluent material from within a container includes a tank and a piston defining therebetween a pump chamber and movable relative to each other to pump fluid from the container into and out of the pump chamber. A poppet interposed between the tank and the piston extends at one end thereof into the inlet conduit for the pump chamber and at the opposite end into the exhaust conduit. When the tank and piston are moving relative to each other to draw fluid from the container into the pump chamber, the end of the poppet extending to within the exhaust conduit engages against a valve seat defined in the exhaust conduit to close the exhaust conduit. The other end of the poppet extending to within the inlet conduit is frictionally engaged within the inlet conduit and the drag forces thus effected upon this end of the poppet operate to enhance the sealing effect of the opposite end of the poppet to close the exhaust conduit thereby permitting fluid to be drawn into the pump chamber.

Abstract: A submersible pumping system especially adapted to cryogenic storage systems which includes a single fluid transmitting casing extending from the top to near the bottom of the storage container, a normally closed spring biased foot valve on the bottom of the casing, a sealing gland closing the top of the casing having a shiftable portion, and a pump and motor unit suspended through the shiftable portion of the sealing gland in the casing and adapted to open the foot valve. The pump and motor unit is centered in the casing and aligned with the foot valve by mating frusto-conical collars associated with the pump and motor unit and with the valve assembly. The shiftable sealing gland allows the pump and motor unit to be lifted off the foot valve so as to close the valve without venting the casing.