Abstract: The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the evacuation valve. A check valve located in the metering chamber moves from a closed to an open position on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering. The metering device may include means to regulate the length of the working stroke.

Abstract: Disclosed is a device (V) for concentrating a liquid (F) which is pumped through a concentrating apparatus (3) by means of a differential piston pump and directly impinges the differential piston (K) in an assisting manner during the conveying stroke at a residual pressure as a concentrate (FK). The differential piston of said device (V) is driven by a drive shaft (12) that actuates a linearly guided valve control member (18) of an intake and discharge valve assembly (A). The differential piston pump is embodied as a radial piston pump (R) in which eccentric attachments (13, 14) for the differential piston (K) and the valve control member (18) are disposed on the drive shaft (12), the differential piston (K) and the valve control member (18) being hinged directly to the eccentric attachments (13, 14) by means of traction and pressure couplings (S).

Abstract: A system, in one embodiment, includes a first service pack module and a second service pack module, wherein the first and second service pack modules are separate from one another. The first service pack module includes a hydraulic motor, an air compressor drivingly coupled to the hydraulic motor, and a generator drivingly coupled to the hydraulic motor. The second service pack module includes an engine, and a hydraulic pump drivingly coupled to the engine. The hydraulic pump also may be configured to supply hydraulic fluid to the hydraulic motor of the first service pack module. A system, in another embodiment, includes a first enclosure, a hydraulic motor, an air compressor drivingly coupled to the hydraulic motor, and a generator drivingly coupled to the hydraulic motor, wherein the hydraulic motor, the air compressor, and the generator are self-contained within the first enclosure without an engine and a hydraulic pump.

Abstract: A hydraulic pumping system is provided for delivering a compressible fluid material from a hopper to an outlet. A primary hydraulically driven pumping unit has a first interior volume for receiving the fluid material from the hopper. A secondary hydraulically driven pumping unit is interconnected with the primary hydraulically driven pumping unit and has a second interior volume less than the first interior volume for receiving fluid material from the primary hydraulically driven pumping unit. The primary and secondary hydraulically driven pumping units have hydraulically driven reciprocating piston units with unequal stroke lengths.

Abstract: The present invention is directed to an analyzer for measuring the vapor pressure of a hydrocarbon liquid. The analyzer includes a pressure measuring system connected to an air saturation system having a circulation chamber with opposing first and second ends. A first opening is disposed toward the first end and a second opening is disposed toward the second end. A plumbing system connects the first and second openings. A pump moves the hydrocarbon liquid through the plumbing system from the first opening to the second opening so as to saturate the hydrocarbon liquid with air. The air saturation system has a cooler for cooling the hydrocarbon liquid and the pressure measuring system has a heater for heating the hydrocarbon liquid. The pump may be a piston actuated pump or a motor-driven pump and the plumbing system may include an aeration chamber.

Abstract: A system and method for pumping fluid using a pump cassette. The system includes a control assembly for operating the pump cassette. A force assembly having a movable member is capable of applying force to the pump cassette to press the pump cassette against the control assembly. The movable member may be an expandable member, such as a bladder.

Abstract: A two-stage air powered hydraulic pump has a portion of the air pressure that operates the pump diverted directly to the reservoir. The air pressure on the reservoir presses hydraulic fluid in the reservoir out of the reservoir, through the pumping chamber and to the load to quickly advance the load under low load conditions and to pre-charge the pumping chamber.

Abstract: A chemical liquid supplying apparatus, which can discharge chemical liquid with high precision, is provided. A pump assembly is detachably mounted in a pump case in which liquid inflow and discharge ports are formed. The pump assembly includes: a cylindrical body in which a piston is slidably incorporated axially; an elastically deformable bellows forming a pump chamber in the pump case and forming a drive chamber in which an indirect medium is enclosed; and an axially elastically-deformable bellows cover continuing with a sliding surface of the piston and forming a seal chamber in which the indirect medium is enclosed, and the pump assembly is unitized. The pump assembly is coupled to a drive shaft via a connecting member, and by axial-directional reciprocating movement of this drive shaft, the piston causes the bellows to perform a pump operation, whereby the chemical liquid is discharged from a liquid discharge portion.

Abstract: A hydraulic control unit for a motor vehicle having a motor providing a drive shaft driving a rotatable piston bearing surface at a proximal end of the motor, a hydraulic block providing cavities housing a pumping assembly and fluid control valves, and a control section providing solenoid coils receiving portions of the fluid control valves, with the pump cavity being disposed on a first end of the hydraulic block and the valve cavities being disposed on an opposite end of the hydraulic block, and the pumping assembly being reciprocalably driven by the rotatable piston bearing surface along an axis radially disposed from and otherwise parallel to the axis of rotation of the rotatable piston bearing surface. In another aspect, a pump element having a ball bearing assembly mounted at an oblique angle with respect to the axis of rotation of a seat, and a pumping assembly reciprocally bearing against an outer portion of the ball bearing assembly.

Abstract: The device includes a rolling bearing unit supporting a radial load and a magnetic bearing unit supporting an axial load and/or a bearing preload; an electromagnet fitted to a spindle housing so as to confront, on a non-contact basis, a flange shaped thrust plate mounted on a main shaft; a motor rotor of a motor for driving the shaft, and a motor stator opposed to the rotor, the shaft being driven by magnetic or Lorentz forces developed between the rotor and the stator; and a sensor detecting an axial force acting on the bearing unit, and a controller controlling the electromagnet. In this device, the stiffness of a composite spring formed by the bearing unit and a support system for the bearing unit is chosen to be higher than the negative stiffness of a composite spring of a motor part comprised of the electromagnet and the motor.

Abstract: A method is provided for compressing a gas in a single cycle and in a single cylinder to a pressure of at least 17.2 Mpa with a compression ratio of at least about five to one. The method further comprises dissipating heat from the cylinder during the compression stroke whereby the gas is discharged with a temperature significantly less than isentropic. The apparatus comprises a hollow cylinder and a reciprocable free-floating piston disposed therein. The piston divides the cylinder into: (a) a compression chamber within which a gas can be introduced, compressed, and discharged; and, (b) a drive chamber, into which a hydraulic fluid can be introduced and removed for actuating the piston. The apparatus further comprises a piston stroke length to piston diameter ratio of at least seven to one. For operating the apparatus with a compression ratio of at least five to one, an outlet pressure of at least 17.

Abstract: A rotary pressure exchange device for transferring the pressure of a high pressure stream of first fluid to a low pressure stream of second fluid having an improved substantially cylindrical rotor (41, 51, 61). The rotor is formed to provide a plurality of longitudinal passageways comprising the lumens (49) of parallel tubes (47, 73) of circular cross-section which are located uniformly throughout an annular region. Certain preferred embodiments include an outer tubular casing (43) of circular cross-section and a coaxial central hub (45).

Abstract: A technique facilitates the pumping of fluids in a well related application while minimizing the number of system components. The system and methodology comprise a plurality of pumps for use at a well site to deliver a well treatment fluid to a desired location. A single driveline is coupled between the plurality of pumps and a motive unit without incorporating a splitter box. The driveline is driven by the motive unit to rotate the plurality of pumps.

Abstract: An anti-jammed air pump includes a shell, the shell has a motor, a diaphragm and an internal seat inside, an air chamber is formed between the diaphragm and the internal seat, the internal seat has inlets and outlets, the inlets or outlets have unidirectional disc respectively; diaphragm connects with the driving shaft of motor via a coupling device, an eccentric shaft and an eccentric gear, the shell has inlet coupling devices and outlet coupling devices which corresponding to the inlets and outlets in respective internal seats; a stress relief groove communicating the inside and outside of the air chamber is positioned in the edge of said internal seat which connects with the diaphragm.

Abstract: A downhole electric driven pump unit for oil production comprises a submersible electric motor (1), a driven oil pump (2), a working plunger pump (4), an oil tank (7) provided with a secondary oil filter (8), an oil volume expansion compensator (9) and a hydraulic engine (10). Above-piston and under-piston cavities (11, 12) of the hydraulic engine cylinder (13) are connected to the oil pump suction and discharge sides (15, 16) through a distributor (14). The hydraulic engine piston (17) is connected to the plunger (18) of the working pump. The electric motor is provided with a protector (19) and is cinematically linked with the driven pump shaft by means of the protector shaft. The working pump cylinder (20) is provided with a sealed cylindrical diaphragm (21) made of elastic material such that oil filled cavity (22) is formed. The working pump plunger (18) is mounted such that it is reciprocatingly displaceable in the cavity (22).

Abstract: A pumping cassette including a housing having at least two inlet fluid lines and at least two outlet fluid lines. At least one balancing pod within the housing and in fluid connection with the fluid paths. The balancing pod balances the flow of a first fluid and the flow of a second fluid such that the volume of the first fluid equals the volume of the second fluid. The balancing pod also includes a membrane that forms two balancing pods. Also included in the cassette is at least two reciprocating pressure displacement membrane pumps. The pumps are within the housing and they pump the fluid from a fluid inlet to a fluid outlet line and pump the second fluid from a fluid inlet to a fluid outlet.

Abstract: The present invention is directed to a Universal Pumping Platform (UPP) that comprises a platform containing an electric motor that drives a hydraulic pump for producing high pressure hydraulic fluid and one or more pumps powered by the hydraulic fluid from the hydraulic pump. The pump is selected for the desired commissioning method to be carried out, such as filling, chemical treating, pigging, hydrostatic testing or dewatering the pipeline. The UPP is suspended from a vessel by an umbilical that provides the electric current for the electric motor supported by the UPP.

Abstract: A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a valve spool. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communication with the transfer chamber via at least one valve. The valve spool is configured to control fluid flow between the transfer chamber and the fluid reservoir. The valve spool is movable to open and close an opening into the at least one valve only when an overfill condition or an underfill condition exists in the transfer chamber. The valve spool is moveable along an axis that is non-coaxial with an axis of movement of the diaphragm.

Abstract: The present invention is concerning a hydraulic pump system with integrated distributor valve, which is generally applied in a hydraulic circuit normally constituted of an oil deposit (39), a cylinder (40), a module of Pneumatic control (41), and a hydraulic pump with integrated distributor valve (42). The system object of the present invention presents a reduction of the accidents and ruptures in the gear box, operates with higher pressures, reduces the vibrations and prevents clearances and consuming of the pump. The present invention is applicable mainly to power take off's (43) that are located in the gear box of the trucks.

Abstract: A chemical liquid supplying apparatus which can discharge chemical liquid with high accuracy is provided. The apparatus is used to discharge the chemical liquid in a chemical liquid tank from an application nozzle. The apparatus has a combined member formed integrally with a pump case and a cylinder, and a flexible tube serving as a pump member is provided in the pump case, wherein its inside is a pump chamber and its outside is a pump-side driving chamber. A piston is assembled to the cylinder and when the piston is reciprocated by a motor, the pump chamber is expanded and contracted. A gap between the piston and the cylinder is covered with a diaphragm, and an interior of the diaphragm is a seal space. Therefore, an incompressible medium having leaked from the gap between the piston and the cylinder enters into the seal space and does not leak to the outside.

Abstract: A liquid additive injection pump for injecting a predetermined amount of a secondary fluid into a primary fluid stream wherein a fluid mixing chamber is disposed within the pump housing assembly. A gasket having at least one one-way valve is positioned between the pump assembly components and mixing chamber thereby allowing a primary fluid to pass through the pump assembly and into the mixing chamber where the introduction of a second fluid occurs. The mixed fluids are then discharged through an outlet. The one-way valve gasket assembly acts to prevent the mixed and/or secondary fluid from passing upstream of the gasket assembly and into the pump assembly.

Abstract: An air valving system for a reciprocating piston pump (5) which uses piston (10) actuated poppet assemblies (40) to control the main air valve (16) shift. The valve exhaust is vented (50) directly to atmosphere rather than through the main exhaust to ensure reliability. A ramped detent (32) prevents the air valve (16) from centering.

Abstract: An air operated pump (10) uses a magnet (14) mounted in the valve cup (16) of the air motor (18) and two reed sensors (20) mounted in the valve cover (22) to monitor the speed and position of the valve (16). A solenoid (24) is mounted on the valve cover (22) and can be commanded to extend a plunger (26) into the valve cup (16) to stop valve movement and therefore the pump from running away. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid (24) to monitor the solenoid movement.

Abstract: An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away. A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.

Abstract: A hydraulic submersible pump with electric motor drive including a master cylinder and at least one slave cylinder in axial alignment with the master cylinder, each having a piston. Each slave piston is connected by a rigid linkage to the master piston, such that movement of the master piston results in movement of each of the slave pistons. Hydraulic fluid is driven through hydraulic fluid conduits by a hydraulic pump selectively supply hydraulic fluid to and draws hydraulic fluid from different portions of the master cylinder. An intake port with a one way valve is on the at least one slave cylinder permits entry of well fluids from the well into the at least one slave cylinder via the intake port and preventing well fluids from exiting the at least one slave cylinder via the intake port. An exhaust port controlled by a one way exhaust valve is on the at least one slave cylinder adapted to be connected by conduit to surface. An electric motor drives the hydraulic pump.

Abstract: Embodiments of the present invention relate generally to certain types of reciprocating positive-displacement pumps (which may be referred to hereinafter as “pods,” “pump pods,” or “pod pumps”) used to pump fluids, such as a biological fluid (e.g., blood or peritoneal fluid), a therapeutic fluid (e.g., a medication solution), or a surfactant fluid. The pumps may be configured specifically to impart low shear forces and low turbulence on the fluid as the fluid is pumped from an inlet to an outlet. Such pumps may be particularly useful in pumping fluids that may be damaged by such shear forces (e.g., blood, and particularly heated blood, which is prone to hemolysis) or turbulence (e.g., surfactants or other fluids that may foam or otherwise be damaged or become unstable in the presence of turbulence).

Abstract: A fluid dispenser includes a diluent fluid inlet; a fluid-driven proportioning air pump in fluid communication with a diluent fluid inlet, the air pump being driven by fluid from the diluent fluid inlet and having an air outlet isolated from the diluent fluid inlet; a fluid container having first and second openings, the first opening in fluid communication with the pump air outlet; and wherein the pump creates air pressure and flow to evacuate the container of fluid through the second opening. An associated method of evacuating fluid from a container includes supplying a diluent fluid to the proportioning air pump through the pump fluid inlet; delivering a volume of air from the pump air outlet to the container in order to displace a similar volume of fluid and evacuate that volume of fluid from the container; and diluting the evacuated fluid with diluent fluid from the pump fluid outlet.

Abstract: Transfer pump of the type in which the moving part for pumping is a bellows (4) that is alternately filled with and emptied of hydraulic liquid at high pressure by a piston (1) that is driven by a cam (2), whereby the amount of fuel allowed into the chamber (5) into which the bellows (4) moves is determined, upstream, by a solenoid valve (8) that is driven by the computer for monitoring the engine, characterized by the fact that it comprises at least two pumping units (piston 1/bellows 4) that are supplied by a single intake system (6) that is common to the units on which the flow-monitoring solenoid valve (8) is placed and that have a conveyor circuit (10) that may be unique and common, or specific to each pumping unit.

Abstract: A pressure exchanger for the transfer of pressure energy from a high pressure fluid stream to a lower pressure fluid stream wherein a generally cylindrical housing contains a rotor having a plurality of channels extending axially therethrough and a pair of end covers which slidingly and sealingly interface with respective end faces of the rotor. The end covers are supported against deformation by high pressure upon the end covers in an inward direction, as by exerting a balancing comparable outward axial force upon inward surfaces of the end covers through the employment of pressure-balancing chambers that are in communication with a high pressure fluid region at one end cover.

Abstract: A hydraulic drive system for providing a smoothed or near sinusoidal output flow characteristic for reciprocating piston pumps is disclosed. A solution to hydraulic hammer caused by rapid flow reversal in the hydraulic control valves used within the system is presented that is based about a sloped hydraulic spool piece used in hydraulic control valves.

Abstract: A pumping system for hyperpolarized gases employs a reversible fluid flow against a deflectable gas transport bladder. Inflation and deflation of the gas transport bladder is operably associated with valves for directing the flow of the hyperpolarized gas. A second gas transport bladder may be operably associated with additional valving so as to provide more continuous hyperpolarized gas flow. The first and second gas transport bladders may be arranged in-line with a reversible pumping mechanism.

Abstract: A rotary valve for switching supply passages, and discharge passages of high-temperature and high-pressure steam for a rotor rotatably supported at a casing is constructed by making a fixed side valve plate and a movable side valve plate abut to each other on a slide surface. A pressure chamber into which the high-temperature and high-pressure steam is introduced from the supply passage is opened to a mating surface of a valve body portion with the fixed side valve plate. The fixed side valve plate supported to float is pressed against the movable side valve plate with a pressing load generating in the pressure chamber to bring it into close contact with the slide surface. Leakage of the high-temperature and high-pressure steam from the pressure chamber is prevented by placing a V-packing inside the pressure chamber.

Abstract: An infiltration apparatus, having a cannula, a flexible tubing connecting to one end of the cannula, a peristaltic pump comprising a pathway for the flexible tubing to extend through and a plurality of non-conductive rollers installed along the pathway to exerting force on the flexible tubing, a reservoir in fluid communication with the cannula via the flexible tubing extending through the peristaltic pump, a foot pedal pneumatically connected to the peristaltic pump to control operation thereof. The response of the foot pedal can be programmed into various modes. Under one of the modes, when the foot pedal is depressed, the peristaltic pump is switched on and remains as long as the foot pedal is depressed. Once the foot pedal is released, the peristaltic pump is switched off. Under another mode, one depression event, regardless how long the depression event lasts, the peristaltic pump is switched from on to off, or from off to on, and remains off/on before a next depression event occurs.

Abstract: A valve for controlling a flow of fluid to a pump is disclosed. The valve includes a first member and a second member. The first member includes a first surface and an inlet opening, a first opening, a second opening, and an outlet opening extending through the first surface. The second member includes a second surface in contact with the first surface. The second member is movable relative to the first member between a first position and a second position while maintaining the first and second surfaces in contact with each other. At least one of the first surface and the second surface is made of a self-lubricating material. In the first and second positions, the second member allows selective flow communication among the inlet, first, second, and outlet openings and controls a flow into and out of the pump.

Abstract: An ink pump for a punp inking unit of a rotary printing press utilizes a two piece coupling between the ink pump and an ink pump drive unit. The ink pump is part of a replaceable inking unit while the ink pump drive unit is supported in the frame of the press. The two piece coupling operatively connects the ink pump and the ink pump drive unit. Each piece of the coupling is a permanent magnet. These engage in a non-positive fit to provide a robust coupling.

Abstract: A pneumatically driven hydraulic pump in accordance with the present invention is comprised of a cylindrical body, a front end cap, a rear end cap, a division wall, a piston, a control valve, a pneumatic valve, an air bladder and a pedal. The pneumatically piston and the air bladder also connected to the air source are used to quickly pump hydraulic fluid to an external hydraulic lifting device. Consequently, a heavy object can be lifted or lowered quickly.

Abstract: In a fluid-pumping system comprising a pump and a pulsation dampener, which is arranged to dampen pressure pulsations, the pump is driven by a piston and motor. The pulsation dampener is arranged to be charged via an associated regulator, which is arranged to regulate the charging air pressure by reference to the average pressure of the fluid exiting the pump. Preferably, the pulsation dampener comprises two apertured walls, between which a diaphragm is mounted, one such wall being mounted so as to limit displacement of the diaphragm toward the air-side chamber and the other wall mounted so as to limit displacement of the diaphragm toward the fluid-side chamber. Two similar dampeners may be employed, one to dampen pressure surges and the other to dampen pressure drops.

Abstract: A peristaltic compressor suitable for relaxation-free compression of polarized gas including a pumping rotor driven by a motor provided with a plurality of rollers, and at least a tube, wherein the rotor and the tube(s) is(are) placed in a depressurized chamber having a lower pressure than atmospheric pressure, and wherein the motor is formed by at least one tube fed by a pressurized fluid, driving into rotation a peristaltic rotor provided with rollers, coupled with the pumping rotor.

Abstract: In a fluid-pumping system comprising a pump and a pulsation dampener, which is arranged to dampen pressure pulsations, the pump is driven by air delivered at a regulated pressure. The pulsation dampener is arranged to be charged via an associated regulator, which is arranged to regulate the charging air pressure by reference to the air pressure in an averaging tank. Preferably, the pulsation dampener comprises two apertured walls, between which a diaphragm is mounted, one such wall being mounted so as to limit displacement of the diaphragm toward the air-side chamber and the other wall mounted so as to limit displacement of the diaphragm toward the fluid-side chamber. Two similar dampeners may be employed, one to dampen pressure surges and the other to dampen pressure drops.

Abstract: A pressure exchanger for simultaneously reducing the pressure of a high pressure liquid and pressurizing a low pressure liquid. The pressure exchanger has a housing having a body portion; with end elements at opposite ends of the body portion. A rotor is in the body portion of the housing and in substantially sealing contact with the end plates. The rotor has at least one channel extending substantially longitudinally from one end of the rotor to the opposite end of the rotor with an opening at each end. The channels of the rotor are positioned in the rotor for alternate hydraulic communication with 1) high pressure liquid and 2) low pressure liquid, in order to transfer pressure between the high pressure liquid and the low pressure liquid. Because of the high pressures and the high angular velocities, this is a highly cavitation prone structure, In order to prevent cavitation, there are one or more grooves in one or both of the end plates.

Abstract: A portable high capacity air compressor system comprises an air compressor with a hydraulic motor coupled thereto to form a compact compressor unit, and a removable air reservoir which is releasably attached to the compressor unit.

Abstract: A method and system for circulating sample solution within a reaction chamber containing a microarray. The reaction chamber contains, on each side, a shallow vertical and a deep vertical well at the comers of the microarray. The vertical wells having a gap between the active surface of the microarray and the bottom of the reaction chamber are filled with sample solution. As the reaction chamber is rotated, sample solution from the deep vertical well displaces sample solution in the gap between the active surface of the microarray and the bottom of the reaction vessel, and sample solution from that gap is, in turn, displaced into the shallow vertical well, from which it flows along the inner surface of a cover strip above the microarray back to the deep vertical well.

Abstract: A hydraulically actuated down-hole pump formed as a vertically elongated tubular structure having an engine outer tube that receives a reduced external diameter engine cylinder providing an annular power fluid passageway there between with an engine piston in the engine cylinder, a production outer tube supported to a lower end of the engine outer tube, the production outer tube receiving a reduced external diameter production cylinder providing an annular production fluid passageway there between, a ported valve rod interconnecting the engine piston and production piston, an engine valve controlling the delivery of power fluid to the power cylinder and production valve controlling the passage of production fluid to the production cylinder, the annular passageways reducing the need for external pump seals.

Abstract: A governor for fluid powered diaphragm pumps is shown and described. At least one pump member or oscillatory member moves in response to the varying pressures in the inner chambers of the diaphragm pump. Thus, each pump member or oscillatory member moves at the frequency at which the pump operates. Each pump member pumps fluid through a hydraulic circuit. The fluid flowing through the hydraulic circuit moves a flow regulator disposed in the line that provides communication between the air or power fluid supply and the main air valve or main valve with a pump. In the event the pump operates too fast or at too high a frequency, the pump member or members will pump hydraulic fluid through the circuit at a sufficient flowrate so as to move the flow regulator to a position where it reduces the flow rate of power fluid to the main valve of the pump.

Abstract: A reciprocating pump is provided for pumping subterranean fluids containing fine solids to surface. The pump comprises a pump barrel, piston and piston rod. The piston rod is suspended form reciprocating production tubing. The barrel is anchored in the casing of a well. A standing valve is located at the bottom of the barrel. The piston and travelling valve are located at the bottom of the piston rod for minimizing the dead-space between standing and travelling valves. Upper and lower stacks of hydraulic piston seal rings are positioned on the piston above and below the travelling valve for minimizing piston height. Each seal has radially flared lips at its leading edge. The piston spaced grooves formed therein, corresponding to the seal ring flared lips.

Abstract: A pump for impelling a fluid includes a first variable volume, the first variable volume having a first inlet for allowing the influx of the fluid into the first variable volume and a first outlet for allowing the efflux of the fluid out of the first variable volume and a first membrane defining at least a portion of the first variable volume. The pump also includes a first contractile actuator, for displacing the first membrane from a first position to a second position in such a manner as to vary the first variable volume and a second contractile actuator, for restoring the first membrane from the second position to the first position in such a manner as to vary the first variable volume. A first check valve is coupled to the first inlet for regulating the influx of fluid into the first variable volume through the first inlet and a second check valve is coupled to the first outlet for regulating the efflux of the fluid out of the first variable volume through the first outlet.

Abstract: The invention is a water wheel supplying energy to a pump. The pump will typically be used to apply chemical treatments to the water stream. Some examples of chemicals to be added are acids or bases to bring the pH to an acceptable level, precipitation aids for suspending metal out of water, coagulants to aid in filtering dissolved solids out of water, flocculants to aid in filtering dissolved ions out of water, chlorine, or coloring to prevent growth of algae.

Abstract: A flow control assembly is provided for a submersible pump drive which has a hydraulic drive motor and a bearing pack for sealing a drive shaft which transfers drive from the drive motor to an oil well pump. The flow control assembly incorporates a production containment device for engaging said bearing pack The production containment device has a collar for supporting the bearing pack, drive shaft and hydraulic drive motor within the submersible pump drive, and a passageway through the collar for channeling fluid therethrough. The flow control assembly further includes a seal protection device for demountably engaging the bearing pack opposite the hydraulic drive motor. The seal protection device has a fluid deflecting cone shaped tip and a hollow cylindrical portion adjacent the tip for receiving a lubricant to impede any fluid entering the seal protection device from migrating through the bearing pack.

Abstract: A reciprocating hydraulic motor and pump assembly includes a cylinder and a piston disposed for reciprocation in the cylinder. The piston includes a stem having a bore extending longitudinally in the stem and a piston head connected to one end of the stem. The piston head includes a cavity communicating with the bore. A spool is slidably mounted in the stem bore and the piston head cavity. A magnetic latching assembly is disposed in the piston head cavity. A displacement rod is fastened to the piston rod. The hydraulic motor and pump assembly is used in an airless paint sprayer system.

Abstract: Regenerative hydraulic power transmission for subsurface pumps, including a power source, a variable flow rate hydraulic pump, means to reverse flow through the hydraulic pump responsive to change in direction of the subsurface pump stroke, and an inertial assist for the power source which gathers energy from the downstroke of the subsurface pump and utilizes the gathered energy to power the upstroke of the subsurface pump. The transmission can vary upstroke speed apart from downstroke speed, pump stroke length and dwell time of change in stroke direction.