Abstract: A gas transport and pressurization system, including a static valve, a compartment concentrically arranged around the static valve, a dynamic valve axially displaceable relative to the static valve, and a crankshaft connected to the dynamic valve, wherein gas from a ground gas well flows through the compartment, the dynamic valve, and the static valve to a gas outlet.

Abstract: This present disclosure relates to feeding and discharging fluids to and from a high-pressure process and is described using the example of supercritical water treatment of used oil. The apparatus comprises a fluid feed pump that feeds unprocessed process fluid into a high-pressure process, a fluid discharge pump and a fluid pressure buffer system.

Abstract: A three-stage compression air pump includes a pump head and a pumping device. The pumping device includes first and second cylinders and a plunger. The first cylinder is connected with the pump head and coupled to a first piston moving in the second cylinder. The second cylinder includes a first end cap and a second end cap respectively coupled to the two ends thereof. The first cylinder is inserted through the first end cap. The second end cap defines an orifice allowing outside air to flow into the second cylinder and includes a one-way valve preventing the air in the second cylinder from flowing outside the three-stage compression pump. The plunger is inserted in and movably coupled to the first cylinder and coupled to a second piston moving in the first cylinder and connected with the second end cap. The plunger is inserted through the first piston.

Abstract: An inflator includes a mouthpiece, an adjustment mechanism, and an air cylinder mechanism that includes a large-diameter cylinder permitted to move relative to the mouthpiece. When the large-diameter cylinder is moved away from the mouthpiece, air from external environment is sucked into a first space of the air cylinder mechanism. The adjustment mechanism is operable to switch between a pressure relief state, where air in the first space is released to the external environment when the large-diameter cylinder is moved toward the mouthpiece, and a sealed state, where the air in the first space is injected into the mouthpiece when the large-diameter cylinder is moved toward the mouthpiece.

Abstract: A mechanically actuated traveling valve for use in fluid pumping equipment. More particularly, a multiple component mechanically actuated traveling plug valve having a valve seat, a valve plug and at least one displaceable valve ring positioned therebetween is provided for use in subsurface positive displacement pumps capable of pumping high viscosity fluids, with any gas to liquid ratio, operating at any inclination angle.

Abstract: A modular system of reciprocating pumps is to be designed in such a way that any type of said reciprocating pumps can be economically assembled and tested on a flexible assembly device. The magnetic part is a pre-assembled subassembly that can be tested separately and is overmolded with plastic material; the connection point to the pump part has a given connecting contour that allows different types of pump parts of the modular system to be connected; and the pump part is a pre-assembled subassembly that can be tested for the displaced volume thereof. Feed pumps and metering pumps for fuels and aqueous reagents.

Abstract: Apparatus for dispensing a dose of fluid, the apparatus comprising a dispensing vessel with a dispensing outlet, the vessel having a piston and a vessel wall defining a cylinder in which the piston may move under pressure from a first position to a second position, wherein the apparatus has a bypass passage that extends through the first piston and has a valve member that is opened by a valve actuating plunger in the piston that moves within the piston to push the valve open when the valve actuating plunger abuts a shoulder at or near the second position in the vessel; wherein the shoulder at the second position is an annular shoulder and the apparatus is adapted to dispense fluid in a sequence of stages comprising a mixing stage and a dispensing stage.

Abstract: A treatment solution supply method includes: a degassed treatment solution generating step of degassing a treatment solution by a degassing mechanism to generate a degassed treatment solution; a treatment solution storing step of storing the degassed treatment solution in a container; a filter solution-passing step of bringing a downstream side from a filter connected to a downstream side from the container via a treatment solution supply pipe to a negative pressure with respect to a pressure in the container to pass the treatment solution in the container through the filter; and a negative pressure maintaining step of maintaining a state in which the downstream side from the filter is brought to the negative pressure, for a predetermined period, after stopping supply of the treatment solution from the container to the filter.

Abstract: A fluid drainage device, for use in a closed wound drainage system, which includes a fluid-receiving volume having a bore, a piston in sealing contact with the bore, a prop extending from the piston and which is connected to an energy storage device, wherein the piston can be user-actuated between a first position, whereby energy is stored in the energy storage device, to a second position, whereby energy is released from the energy storage device, to increase the size and reduce the pressure of the volume, allowing fluid to flow from a conduit into the volume.

Abstract: The present invention provides non-venting transfer systems and methods related to transferring cryogenic liquid between two vessels without venting evaporated cryogenic liquid into the atmosphere. The stations, systems, and methods utilize a feed line and a return line connecting a source tank and a pump system to allow for flow of a cryogenic liquid to the pump and return of evaporated cryogenic liquid to the source tank, thereby avoiding release of the evaporated cryogenic liquid into the atmosphere.

Abstract: The invention relates to a reciprocating piston pump having a magnet drive and a first displacement chamber and a second displacement chamber, which are separated from each other by a piston, wherein both displacement chambers are connected to each other by a fluid-conducting channel. An overflow valve is arranged in the channel and allows a preferred flow from the first displacement chamber to the second displacement chamber, wherein an additional return valve is arranged either in a transition region between an inlet and the first displacement chamber or in a transition region between the second displacement chamber and an outlet, an armature of the magnet drive being firmly connected to the piston.

Abstract: A compression apparatus for compressing a fluid, the apparatus having a frame and a motor mounted to the frame, the improvement comprising a drive mechanism installed on the frame so as to be driven by the motor and at least one piston-cylinder unit operably connected to the drive mechanism, the piston-cylinder unit having a cylinder, a piston slidably installed within the cylinder, and a piston rod interconnecting the piston and the drive mechanism so as to shift the piston up and down within the cylinder.

Abstract: The present invention provides a piston pump for liquid in which a sump is defined in a chamber into which sump liquid in the chamber flows due to gravity. A passageway leads from an outlet of the sump out of the chamber to a dispensing outlet. The dispensing outlet is at a height below the height of the sump outlet and fluid to exit the sump flows from the sump outlet upwardly in a first portion of the passageway to a height above the sump outlet then downwardly to the dispensing outlet. The chamber and its sump is defined between a piston chamber-forming member defining the chamber to be downwardly opening and a piston forming element axially slidable in the chamber.

Abstract: A supercharged internal combustion engine including a pressurized fluid outlet, the engine comprising a two-ended piston, with one end received in a combustion chamber, and another end received in a hydraulic chamber. The piston further including a portion intermediate the two ends and received within an air chamber, and the air chamber has an air outlet communicating with a combustion air inlet to the combustion chamber.

Abstract: The invention relates to a hydraulic device with a supply line for pressurized hydraulic fluid and with a lubricating pump that is connected to the supply line in a fluidic fashion. The lubricating pump comprises a hydraulic inlet, a pump element for conveying a lubricant from a reservoir to at least one lubricating point of the hydraulic device, and mechanism for producing a pump stroke of the pump element. The mechanism for producing a pump stroke comprises a base body, a piston unit movable in the base body, and a reversing mechanism for reversing the direction of movement of at least one element of the piston unit.

Abstract: In a liquid pump for a braking system of a vehicle, one end of a piston is slidably inserted into a cylindrical space of a housing member, and a sliding ring is provided on the piston. A suction chamber is formed by an inner peripheral surface of the housing member, an outer peripheral surface of the piston and the sliding ring. An inner diameter “Dk” of the housing member is made larger than an inner diameter “Dc” of the cylindrical space. As a result, the volume of the suction chamber is increased, without making the piston smaller in its diameter.

Abstract: A hydraulic oil well pumping installation includes a down hole pump positioned down a well, the down hole pump including a master cylinder and at least one slave cylinder in axial alignment with the master cylinder. A master piston is positioned in the master cylinder and divides the master cylinder into a first portion and a second portion. A slave piston is positioned in the at least one slave cylinder and divides the slave cylinder into a first portion and a second portion. The slave piston is connected by a rigid linkage to the master piston, such that movement of the master piston results in movement of the slave piston.

Abstract: A telescopic dual movement pump has a nozzle assembly, a central tube connected to the nozzle assembly, a first tube enclosing the central tube and slidable relative to the central tube and a second tube enclosing the first tube and slidable to the first tube. The central tube has a first piston assembly which includes a block slidably received in the first tube. The first tube has an end provided with a second piston assembly which includes a second block slidably received in the second tube. The movement of the block and the second block in two opposite directions is able to force air inside the pump to be ejected out of the pump.

Abstract: A reciprocating compressor (26) includes two pistons (56 and 58) driven in opposite directions in a piston chamber (54). As a piston is driven in the downstream, compression-stroke direction, pressure causes a piston ring (64 or 66) that seals against the piston-chamber wall to seal against the piston, too, and thereby prevent fluid flow from the piston's downstream side to its upstream side. When the piston is driven downstream, on the other hand, pressure keeps the piston ring spaced from the piston and thereby allows flow from the piston's upstream side to its downstream side. The piston rings thus act as check valves.

Abstract: A vapor-compression distiller includes a rotary heat exchanger. A reciprocating compressor (26) maintains a pressure difference between the compressor's evaporation chambers (46) and its condensation chambers (44). The compressor is assembled in a common rotating assembly with the heat exchanger, so the distiller does not need rotating seals between the compressor and heat exchanger. The compressor includes two pistons (56 and 58) driven in opposite directions in a rotating piston chamber (54). The directions in which they thereby reciprocate are substantially parallel to the rotating assembly's axis.

Abstract: A vapor-compression distiller includes a rotary heat exchanger. A reciprocating compressor (26) maintains a pressure difference between the compressor's evaporation chambers (46) and its condensation chambers (44). The compressor is assembled in a common rotating assembly with the compressor, so the distiller does not need rotating seals between the compressor and heat exchanger. The compressor includes two pistons (56 and 58) driven in opposite directions in a rotating piston chamber (54). The directions in which they thereby reciprocate are substantially parallel to the rotating assembly's axis.

Abstract: A reciprocating compressor (26) includes two pistons (56 and 58) driven in opposite directions in a piston chamber (54). As a piston is driven in the downstream, compression-stroke direction, pressure causes a piston ring (64 or 66) that seals against the piston-chamber wall to seal against the piston, too, and thereby prevent fluid flow from the piston's downstream side to its upstream side. When the piston is driven downstream, on the other hand, pressure keeps the piston ring spaced from the piston and thereby allows flow from the piston's upstream side to its downstream side. The piston rings thus act as check valves.

Abstract: A reciprocating compressor capable of producing a steady-state, continuous, non-pulsing outflow at volumes less than 25 gallons per hour. The compressor utilizes at least two pistons driven in a near axial manner with any lateral forces imparted to the compressor subsequently removed. The compressor is useful in a vapor compression distillate system but could also be adapted to pump liquids. A rotating cam is provided which through cam followers drives the pistons such that the compression stroke of one compensates for the vibrational force introduced into the apparatus by another piston caused by change in that piston's direction.

Abstract: A manual air pump includes an outer tube and an inner tube coaxially mounted in the outer tube. An inner chamber is defined in the inner tube. An outer chamber is defined between the outer tube and the inner tube. A head is coupled to first ends of the inner and outer tubes. The head includes a main passage communicated with the inner chamber and the outer chamber for supplying air to an object to be inflated. An inner piston rod has a first end with an inner piston slidably received in the inner chamber. The inner piston separates the inner chamber into a first chamber section adjacent to the head and a second chamber section distal to the head. An outer piston rod has a first end with an outer piston slidably received in the outer chamber. The outer piston separates the outer chamber into a third chamber section adjacent to the head and a fourth chamber section distal to the head. A handle is secured to second ends of the inner and outer piston rods to move therewith.

Abstract: A pump for pumping through a variable plunger chamber having a pair of plungers disposed in a stepped cylinder with a slide valve includes two plungers of different diameters, united to each other. As they move within a stepped cylinder, the plungers form a chamber of variable volume according to the ratio of their height in respect of the step formed by the cylinder. The ports and clearance between the stem and the plunger chamber create intake, by means of the port housed in the plunger chamber on driving the stem in its upward stroke, and drive by means of the port drilled in the stem on forcing the stem in its downward stroke. Just three structural components are needed for operation of the pump.

Abstract: A two stage compressor or pump with integral electronically controlled multiphase linear motor incorporates a cup shaped moving piston as a stator. The linear motor body has an intake head with valve fitted at the end adjacent to the closed end of the cup shaped piston. A discharge head with a central discharge tube extending into the hollow center of the cup shaped moving piston is fitted to the opposite end of the motor body. As the piston reciprocates it draws the working fluid in through the intake valve, compresses and transfers it through an interstage valve in the closed end of the moving piston into a second variable volume chamber formed by the inside of the cup shaped piston and the discharge tube which acts as a fixed piston, and then further compresses and transfers it out through a valve in the discharge tube. While the design is particularly well suited for use as a compressor in air conditioning and refrigeration systems, it can also be used as a pump.

Abstract: The dual stage, dual mode air pump is selectively operable in a low pressure, high volume mode or a high pressure, low volume mode. It includes a pump head, an outer tube that is engaged to the pump head, an inner tube that is engaged to the pump head and a middle tube that is slidably engaged to both the outer tube and the inner tube. A mode pump switch is utilized to allow the pump operator to change the mode of the pump. In the preferred embodiment, the mode switch is disposed within the pump head. It includes an air passageway having a manually switchable valve disposed therein. In the high volume, low pressure mode the valve switch is closed, whereupon pumped air passes into a pneumatic article engaged to the end of the pump. When the valve switch is opened, the pump is operable in the low volume high pressure mode, and a portion of the pumped air is outletted into the ambient environment, rather than being pumped into the pneumatic article.

Abstract: A tire pump includes a head portion with a tubular portion extending therefrom and a main passage is defined through the head portion and communicates with the tubular portion, a connecting member slidably mounted to the tubular portion and having at least one first passage defined therethrough, a first cylinder retractably mounted to the tubular portion and having one of two ends fixedly connected to the connecting member and a first member slidably received therein which is fixedly connected to a free end of the tubular portion and detachably connected to the connecting member by an actuating device and has a uni-directional valve disposed therein. At least one second cylinder is retractably mounted to the first cylinder and has a second member slidably received therein which has a uni-directional valve disposed therein and a portion fixedly received in the other end of the first cylinder. A third member is fixedly received in the second cylinder and has a uni-directional valve disposed thereto.

Abstract: A pump comprises a pair of coaxial pistons, one slidably positioned in the other for simultaneous compression causing oppositely directed air flow, a passage having a valve for permitting air flow from one such piston to enter the other such piston for increased air flow, and a switching device for selectively opening the passage to ambient for preventing air flow between the pistons. The pump thus has two modes, namely, a high volume mode when the two pistons operate simultaneously to direct combined air flow and a high pressure mode when the passage is opened to ambient to direct air flow from only one of the two pistons having a smaller bore.

Abstract: The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure.

Abstract: An air compressor includes a suction space, a compression space and a discharge space that are aligned with one another. The compressor also includes one-way valves that function as a suction valve and a discharging valve. The open areas of the suction valve and the discharge valve are sufficiently enlarged since both valves are not formed in the same element. Therefore, both valves can permit a large amount of air flow. Further, the suction space serves as a crank space so that fresh air is always drawn into the crank space to cool the crank space.

Abstract: An object of the present invention is to provide a pump which suppresses a decrease in the volumetric efficiency of the pump to a great extent even in case that the kinematic viscosity of a fluid is high with a compact structure of the pump itself.

Abstract: A pump includes a high pressure portion and a low pressure portion. During low pressure, high volume operation, pressure produced in the high pressure portion of the pump is applied to drive a large area piston in the low pressure portion of the pump. Once the pressure in the high pressure portion of the pump raises to a cut-off pressure, at which time it takes excessive power to drive the large area piston, a cut-off valve opens to allow the high pressure portion of the pump to directly pump a relatively lower volume of fluid per stroke at a relatively higher pressure.

Abstract: A cryogenic pump is disclosed for pumping liquified gas from one container to another container or a point of use. The pump comprises a series of chambers and coupling valves for progressively pumping a liquified gas from an inlet end located within and adjacent to the bottom of the container to an outlet conduit. The pump arrangement allows the container to be substantially emptied thereby avoiding waste of the contained liquified gas.

Abstract: The piston ventilators include a double acting reciprocating piston, in which the piston motion delivering breathing gas to a patient receiving assistance from the ventilator simultaneously draws in breathing gas from a source of breathing gas, and a single acting piston ventilator, in which only the delivery end of the cylinder is provided with inlet and exhaust valves. In the double acting piston ventilator, breathing gas is supplied to both ends of the piston cylinder through two intake valves, and exhausting breathing gas through two exhaust valves. Both intake valves of the cylinder are ducted to the breathing gas supply, and the two exhaust valves of the cylinder are ducted to a gas delivery limb of the ventilator connected to the patient's airway.

Abstract: A cryogenic pump capable of operating with a sub-zero net positive suction head includes a reciprocating piston positioned in a cylindrical housing for dividing the interior of the housing into a supercharger chamber and an evacuation chamber on opposite sides of the piston. A supercharger chamber valve, positioned directly behind the reciprocating piston, controls the flow of liquified gas from a gas inlet into the supercharger chamber. A fixed piston, extending into the evacuation chamber, engages a cylindrical skirt carried by the reciprocating piston to form a high pressure chamber between the two pistons. Liquified case from the high pressure chamber is supplied to a gas outlet via a passageway in the fixed piston.

Abstract: A manually operable vacuum pump having a housing including first and second pump chambers whose volume is altered by movement of a displaceable piston which is moved by means of a piston rod attached thereto and fed through one of the first and second pump chambers. The first and second pump chambers are configured such that gas which is fed into the vacuum pump is compressed in two steps, primarily in the first pump chamber and secondarily in the second pump chamber to provide a suitable endvacuum. Thereafter, the gas is expelled from the second pump chamber through the second end cap.

Abstract: A piston diaphragm pump operable for delivering doses of liquids such as surfactants, or wetting agents, for example, includes a pump piston that is reciprocally moveable within a pump tube that encloses a pump pressure chamber. The pump piston is electromagnetically driven against the force of a return spring by a magnetic coil that surrounds the pump tube. In addition, a pump diaphragm is rigidly clamped about an inner circumference to a portion of an upper end of the pump piston. The outer circumference of the pump diaphragm is rigidly clamped about its periphery between upper and middle housing sections. One side of the diaphragm faces a suction chamber, and the other side faces a pressure chamber. A longitudinal bore, that encloses a pump piston provided with a piston valve, extends centrally through the pump diaphragm and links the pressure chamber to the suction chamber.

Abstract: The apparatus provides both a novel reciprocating pump for pumping fluid from a source by forming and moving a fluid column within a tubing and a method of using the pump. The pump, which is particularly suited for oil wells, uses the pressure generated by the fluid column to increase the downward force acting on the pump plunger during the downstroke. The pump is provided with a reciprocable first surface which is in contact with the fluid column, a second surface which moves with the first surface and has a smaller cross-sectional area than the first surface, valve means cooperating with the second surface for subjecting the second surface to fluid at the pressure of the fluid at the source in the vicinity of the pump during movement in one direction and to fluid at the pressure of the fluid column in the vicinity of the pump during movement in the opposite direction.

Abstract: A straight cylinder, clamped between end headers, confines valve assemblies wholly therewithin, and has a cylindrical sleeve set within one half length of the cylinder to effect a staging, i.e., a two-step compression, of the admitted gas.

Abstract: A vane pump in which the ports for passage of highly viscous material pumped are widely dimensioned and the clearances, in particular around the rod which carries the vane, are great. The invention applies to the pumping of materials of the type having a base of butyl rubber and/or polyisobutylene, and in general of materials exhibiting a viscosity greater than 35,000 poises.

Abstract: In a reciprocating pump for cryogenic fluids comprising a pump cylinder in which a piston is oscillatingly displaceable in a sealed state, an inlet valve and an outlet valve, and an annular channel surrounding the pump cylinder on the outer side and forming an outlet for the cryogenic fluid delivered by the pump, in order to attain optimum sealing at the operating temperatures, without the piston motion being impeded at higher temperatures, it is proposed that the cylinder be made of a material with good sliding and self-lubricating properties and a thermal expansion coefficient which is larger than that of the piston, that the dimensions of the cylinder and the piston be so selected that the piston sealingly contacts the inside wall of the cylinder at operating temperature, and that the outlet valve be arranged at the downstream end of the annular channel.

Abstract: An electromagnetic linear motor having a variable length stroke and providing a substantially large force in both its power stroke and return stroke includes concentric inner and outer magnetic circuits arranged coaxially for movement relative to one another in a rectilinear path with reciprocating motion in response to the interaction of magnetic fields produced by the inner and outer magnetic circuits, respectively. The length of the stroke and the rate of reciprocation are directly proportional to the magnitude of the voltage used to excite primary and secondary coils which generate the respective magnetic fields and the rate at which the polarity of the voltage applied to the secondary coil is changed between negative and positive polarities.

Abstract: An apparatus for displacing a high viscous substance, such as grease, which comprises a positive displacement-type pump. The chamber of the pump is in communication with a second chamber defined by a tubular sleeve that is slidably displaceable on the body of the pump, thereby rendering the volume of the second chamber variable and, as such, providing for effective displacement of grease into the chamber of the pump via a valve arrangement. A closure member is disposed to control charging of the second chamber with grease and the displacement of such grease from the second chamber into the chamber of the pump. Also, simultaneously with the charging of the chamber the pump can displace grease therefrom for lubricating or other applications.

Abstract: A pump is disclosed comprising a piston plunger with a valve disposed in it. The ratio of the flow area on either side of the valve is optimized.

Abstract: A fuel injection control apparatus includes a booster apparatus, in which a cylinder chamber is divided into first and second fluid chambers by a piston. The operative area of the piston facing the first fluid chamber is sufficiently greater than that facing the second fluid chamber. Pressurized fuel is supplied to the first fluid chamber through a first check valve. The fluid is delivered from a second fluid chamber to a fuel injection valve via a second check valve. A fluid passage is formed between the first and second fluid chambers. A third check valve is set in the fluid passage, whereby the fuel is allowed to flow only from the first fluid chamber toward the second fluid chamber. The booster piston is located by means of a first piezoelectric device which includes a plurality of piezoelectric elements stacked in layers. When high voltage is applied to the first piezoelectric device to extend it, the piston is moved toward the first fluid chamber.

Abstract: A fluid pump is disclosed having a plunger reciprocating within a working cylinder and a standing intake retention valve. The plunger comprises a stem having affixed to it a plug and a stop, a body being slidably engaged to the cylinder an located on the discharge side of the plug and on the intake side of the stop. Upon the upstroke of the plunger, a plug surface engages with a body seal and therefore pumps the fluid before it. Meanwhile, fluid flows in behind the plunger through the standing intake retention valve. Optionally, a standing discharge retention valve is employed to alleviate the vapor lock condition caused by the combination of counterpressure effect and gases in the fluid. On the downstroke, the plug disengages from the body, allowing fluid to flow noncompressibly past the plunger. Wiper means keep the cylinder surface clean of precipitated solids, so as to prevent abrasion to the sliding exterior surface of the body.

Abstract: A liquid supply pump adapted for coupling to a reciprocable motor, particularly for pumping liquids having thermosetting properties. The pump incorporates a double-acting piston in a pumping cylinder, driven by an elongated drive shaft which projects from the top of the pump for reciprocable motion, the pump having a lower intake valve and an upper exhaust valve, and an intermediate drive shaft seal above the pumping cylinder and a liquid and air drive shaft seal proximate the point of projection of the drive shaft from the pump, wherein said two seals are spaced apart by a distance greater than the pump stroke length, and a liquid drainage path from the intermediate seal back to the pump intake region.

Abstract: The cryogenic pump operates in two stages, utilizing a supercharging part and a high pressure part. These two parts are comprised of a high pressure piston pump (3, 4, 34, 35) and a supercharger (5, 6, 61, 62) disposed in a tandem relationship and sharing a common piston rod (8). The supercharger is enclosed in a heat insulated intermediate container (7) and delivers the liquid cryogenic fluid to the high pressure cylinder. The pump operates to convey a liquid cryogenic fluid such as liquid nitrogen, for example, at a high pressure through evaporating means into pressure resistant commercial steel cylinders where the gaseous nitrogen is kept at a pressure of 200 bar and ambient temperature.

Abstract: A pump recovers viscous fluid from a well area defined by a casing extending downwardly into the well. The pump includes a stationary sleeve disposed within the casing and a tubing disposed within the sleeve and reciprocatable upwardly and downwardly within the sleeve and defining a first closure within the sleeve near its bottom end. A first member is disposed on the tubing in slidable relationship to the tubing and a second member is disposed within the sleeve in co-operative relationship with the first member to define a first valve having open and closed positions. The first and second members are disposed above the first closure to define a pump chamber with the first closure. The tubing is spaced from the sleeve above the first valve to define a storage chamber with the first valve. Means define a second valve with the sleeve at a position below the first valve and have open and closed positions.