Abstract: The invention refers to a linear compressor, comprising: a shell (20); a cylinder (30) affixed to the shell (20) and defining a compression chamber (C); a piston (40) to be displaced in reciprocating movement in the interior of the compression chamber (C) during the operation of the compressor; a linear electric motor (50) mounted to the shell (20); and an actuating means (60) operatively coupling the piston (40) to the linear electric motor (50), in order to make the latter displace the piston (40) in a reciprocating movement in the interior of the compression chamber (C), the actuating means (60) being coupled to the piston (40) by an elastic means (70), so that the actuating means (60) and the piston (40) be displaced in phase opposition during the operation of the compressor.

Abstract: A negative-pressure oxygen providing device includes a base, a power unit, a first negative-pressure device, a second negative-pressure device, and a water suction member. The power unit is fixed on the base and includes a driving member with a driving shaft and a main shaft which communicates with the driving shaft. The driving member drives the driving shaft and the main shaft. The first negative-pressure device is connected to a lower end of the main shaft and includes multiple blades which are merged in the water. The water suction member is connected to the main shaft and includes multiple paths. Each path has a top portion located above the water and a bottom portion of each path is in the water. The second negative-pressure device is located above the water and fixed to the top of the driving shaft so as to suck air into the driving shaft.

Abstract: A tubular pumping element for pumping a liquid is disclosed. The tubular pumping element includes an outer shell that has a bore with an inlet and an outlet at opposite ends of the bore. There is a flow path for the liquid from the inlet through the bore to the outlet. A support element is located within the bore of the outer shell. An elastic sleeve is located over the support element and has a plurality of expandable portions. The support element includes a plurality of fluid passages each coupled to a respective port on the surface of the support element under one of the plurality of expandable portions of the elastic sleeve. Introduction of a driving fluid into one of the fluid passages causes the expandable portion of the elastic sleeve that is proximate to the respective port to expand.

Abstract: A pump comprising a container containing a dispense material, an outlet and an actuator arranged to alternate between a first and a second configuration in response to a change in the pump's environment, which change in configuration causes an aliquot of dispense material to be expelled through the outlet.

Abstract: A compressed gas powered machine is provided. The machine includes: an outlet and a hollow member fluidly connected to the outlet and configured to receive gas expended from the machine through the outlet the hollow member defining holes oriented to allow the gas contained in the hollow member to blow on various parts of the machine.

Abstract: A water pump assembly includes a frame having a mount for mounting the frame to a vehicle. A water pump is mounted within a bottom bowl on the frame and is substantially surround by an encircling U-shaped foot to protect the water pump from damage. A pivotal arch is carried on the frame and a water discharge nozzle is carried on the arch. A flexible conduit connects the nozzle to an outlet of the water pump. Pivoting of the arch flexes the conduit in a fore and aft direction to raise or lower the trajectory of the water stream being thrown from the nozzle. In addition, pivoting of the nozzle about a vertical axis on the arch laterally changes the direction of throw of the water stream by flexing or twisting the conduit in a side to side manner. The nozzle is carried on the arch using a nozzle support sleeve in which the nozzle is free to slide back and forth to accommodate changes in the orientation of the conduit.

Abstract: A drive system for driving a diaphragm pressure wave generator comprising opposed first and second diaphragms (11,13) that are each coupled at or toward opposite ends of a reciprocally moveable drive piston (19). The drive system comprises an operable actuator (27) that generates a reciprocating motion output having a low force and long stroke. The drive system also comprises a hydraulic amplifier that is operatively coupled between the actuator and the drive piston, the hydraulic amplifier being arranged to convert the reciprocating motion output from the actuator into an amplified output having a higher force and shorter stroke, and apply the amplified output to the drive piston (19) to cause the drive piston and opposed diaphragms (11,13) to reciprocate and generate waves.

Abstract: A process is disclosed for the conversion of a hydrocarbonaceous assets into gasoline. The hydrocarbonaceous assets are converted at a first methanol production facility into methanol by processes comprising gasification and methanol synthesis. At least a portion of the methanol is shipped to a second gasoline production facility that is at least 10 miles in distance from the first location. At the second gasoline production facility, at least a portion of the methanol is converted by a MTG process to produce a gasoline and LPG components and steam. At least a portion of the methanol may also be used in a methanol to olefin process to produce olefins and steam. The olefins may be alkylated with olefins to produce alkylates which may mixed with the gasoline.

Abstract: A hybrid hydraulic-electric pumping unit (12) with downstroke energy recovery is disclosed which is operated in a conventional flow mode to supply hydraulic fluid to a hydraulic ram (26), and then is operated in a reverse flow mode to receive the hydraulic fluid from the hydraulic ram (26) and turn an electric motor (16) to generate electric power. A single hydraulic hose (48) connects the pump (18) to the hydraulic ram (26), and is used for both passing the hydraulic fluid from the pump (18) to the hydraulic ram (26) and from the ram (26) to the pump (18). The potential energy of the weight of sucker rods (10) lifted in operating the pumping unit (12) is recovered by operating the pump (18) and motor (16) with return of the hydraulic fluid from the hydraulic ram (26) through the pump (18), which turns the motor (16) to generate electric power.

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: A submersible pump includes a pump valve configured to switch the pump between first and second states in which a piston is respectively extended and retracted. The pump valve includes first and second components that reciprocate between corresponding first and second positions. The pump is in the first state when both components are in their corresponding first position. The pump is in the second state when both components are in their corresponding second position. Neither the valve nor the pump is hydraulically locked at any time during normal operation.

Abstract: This invention relates generally to a pneumatic, hydraulic or other media driver, rotating-reciprocating cylinder apparatus to be mounted on the proximal end of CNC lathe spindles, vertical or inverted machining centers, hydraulic machining work cells or rotary transfer machines to actuate work holding chucks, work holding fixtures, clamping apparatus or work supports on the distal end of said spindles. More specifically, this invention relates to an actuating system with the capability of boosting the input hydraulic pressure to the holding device by a pre-set multiple up to 5000 psi where the boost pump is integral to and rotates with the clamp cylinder assembly.

Abstract: Systems and methods for providing a pump driving unit for driving an above ground pump. The pump driving unit utilizes a single prime mover and a drive train for actuating multiple components required to drive the above ground pump. Some implementations of the pump driving unit include phase separation devices, filtering units, and cooling units that may also be actuated by the drive train of the unit. Some implementations of the pump driving unit further include an enclosure and a platform for containing the unit and simplifying on-site installation.

Abstract: A pump powered partly by a mechanical drive and partly by a pressurized fluid flow and comprised of one or more piston-in-cylinder assemblies in which one face of each piston provides a pumping action while a pressurized driving fluid flow is applied to the opposite piston face, thus supplementing the drive force applied to each piston via a piston rod. Input and output of the pumped flow is controlled by pump valves of a non-return poppet type operated by the pumped flow. Input and output of the driving fluid is controlled by poppet-type valves controlled by connection to the pump valves. Piston movement relative to both the cylinder and the piston rod is controlled, and a two-part pump valve is provided to simplify connection to the motor valves.

Abstract: An integrated portable power unit including a power pack and a generator mounted within a first compartment and including a second isolated air handling compartment. The air handling compartment may include a fan for moving air through ductwork, a radiator for receiving heated cooling water from the power pack and a heat exchanger connected to a compressor for generating cooled water, the compressor and the fan connected to the power pack.

Abstract: A fluid passage member includes a pump mounting surface onto which a hydraulic pump having a rotary axis is mounted; first and second kidney ports opened at the pump mounting surface; a first fluid extraction port outwardly opened and connected to the first kidney port; a motor mounting surface onto which a hydraulic motor having a rotary axis is mounted so that the rotary axis of the hydraulic motor is parallel to the rotary axis of the hydraulic pump; third and fourth kidney ports opened at the motor mounting surface; and a second fluid extraction port outwardly opened and connected to the third kidney port.

Abstract: A downhole pump is operated by a non-electric motor preferably a steam turbine. In a steam assisted gravity drain system the producing well is U-shaped. A steam supply line runs into the turbine that drives the pump after the steam supply passes through a packer. The steam exhaust runs through a shroud until the U-shaped well turns back to go up to the surface. Pump suction is thus separated from steam discharge to reduce mixing as the path of least resistance for the discharged steam when it exits the shroud is up to the surface. The exhaust steam keeps the produced fluids warm and flowing. An injector well runs parallel and slightly above the horizontal portion of the U-shaped producing well.

Abstract: The present application is directed to a submersible pumping system operable under hydrostatic pressure. The system suitably comprises a prime mover submersible within a first fluid; a pump means submersible within the first fluid and sealably coupled to the prime mover; and a fluid source in fluid communication with the prime mover, the fluid source providing a second fluid effective to act on the prime mover to power the pump means; wherein the second fluid is discharged in the first fluid after acting on the prime mover; and wherein the second fluid has a chemical composition substantially similar to the first fluid.

Abstract: A viscous fluid pump is provided. The pump has a housing that has an inlet for receiving viscous fluid and an outlet for dispensing viscous fluid. A bushing within the housing has an opening proximate the inlet and which provides access into an inner chamber of the bushing. The opening extends beyond the inlet in a direction orthogonal to the longitudinal dimension of the pump. A piston is movable within the inner chamber, with the piston having a first position in which the inlet is in fluid communication with the inner chamber through the opening and a second position in which the inlet is not in fluid communication with the inner chamber. The housing may define an interior, with the interior of the housing being free of soft seals.

Abstract: Provided is a displacement amplifying device which uses Pascal's principle and is insusceptible to temperature change. A main body (1) is provided with an accommodation space (11) for accommodating a medium (2) therein. The medium (2) is provided with a fluid (21) with a positive thermal expansion coefficient and a movable body (22) with a negative thermal expansion coefficient. The movable body (22) is displaced according to the movement of the fluid (21). The medium (2) is provided with a small-area first movable surface (23) and a large-area second movable surface (24). The displacement of one of the first movable surface (23) and the second movable surface (24) is transmitted to the other via the medium (2). In the displacement amplifying device, even if the volume of the fluid (21) is changed by the temperature change of the medium (2), the amount of change of the volume of the medium (2) as a whole can be kept low by the volume change of the movable body (22).

Abstract: A compressor assembly includes compressor means having an inlet, an outlet and a means for drawing air through the inlet and exhausting compressed air through the outlet, rotary drive input means, and gear means for changing the speed of the rotary drive input means and having an input connected to the rotary drive input means and an output driving the compressor means, the gear means comprising planetary gear means.

Abstract: The present invention provides a pump, comprising: a disposable pump head having an input port and an output port, and being configured to be frictionally engaged to a motor so as to pump fluid into the input port, through the disposable pump head, and out the output port; and a canister having a cover and a latching arrangement, and configured with an interior cavity dimensioned to receive the disposable pump head, the cover configured to close and frictionally engage the disposable pump head and the motor. The cover has a compressible member, like a pad, dimensioned so as to push a top surface of the disposable pump head so as to frictionally engage the disposable pump head and the motor. The cover may be arranged on a hinge. The latching arrangement may comprise a part for grabbing a lip of the cover.

Abstract: A pumping system comprising a membrane pump (1) for pumping a medium into or out of a vessel (6), the membrane pump comprising an actuating member (13) for moving a membrane (3) in a first direction from a first end position to a second end position against the action of a spring (12), the membrane being movable in the opposite direction from the second end position to the first end position under the action of the spring. The pumping system comprises sensing means (14) for generating a measuring value representing the location of said first end position of the membrane (3), and processing means (17) for establishing a pressure value representing the pressure inside a vessel (6) connected to an inlet (5) or outlet (24) of a pump chamber (4), the processing means (17) being adapted to establish said pressure value based on said measuring value.

Abstract: A system for controlling the stroke of an air-operated double diaphragm pump includes a first control valve and a second control valve disposed in parallel within a drive air outlet conduit. The first flow control valve has a first air flow capacity and the second flow control valve has a second air flow capacity which is less than about 50% of the first air flow capacity.

Abstract: The present invention relates to a pneumatically operated reciprocating pump comprising two opposed pumping chambers, in each one of which a respective flexible bellow slides between a compressed position and an expanded position, a slide of the two flexible bellows being controlled by shuttle means capable to alternatively let a gaseous fluid in one of the two chambers for expanding the respective flexible bellow, whereby when each one of the two flexible bellows assumes a threshold expanded position it interacts with mechanical means allowing the gaseous fluid to be discharged from the respective chamber, each one of the two flexible bellows having a front end in contact with a shaft that is alternatively pushed by one of the two flexible bellows thus compressing the other, each one of the two chambers being connected to at least one respective suction valve and to at least one respective delivery valve, wherein each delivery valve is provided with compensating elastic means capable to compensate variations

Abstract: Motorized single-machine multi-pump apparatus and closed-loop methodology interconnected with a gas pipeline at a natural gas production well, using pressurized gas flow and differential pressure to drive a pumping system regulated by pneumatic controls using self-generated clean, low-pressure instrument air. The apparatus is connected to the gas flow line and the outlet is connected back into the gas flow line at lower pressure, creating a differential pressure corresponding to the source of motive power for actuating a piston which is directly connected to a plurality of plungers. This plurality of plungers is alternately pushed into and pulled out of corresponding plunger-cylinders for creating an integral drive and pump system prerequisite for gas well site pumping operations. Instead of venting to the atmosphere, well gas is returned to the flow line whereupon only clean air from the self-generated instrument air circuit is vented into the atmosphere.

Abstract: A pumping system is provided which is a mobile, vehicle-mounted pumping system, such as for water or fuels, which mounts on a vehicle and may be used for various applications. The pumping system operates a drive system and control system for liquid pumps almost exclusively by hydraulic fluid pressure.

Abstract: A vertically orientated hydraulically driven oilfield lift pump unit having a simplified hydraulic system. The system uses a pair of single acting hydraulic cylinders in tandem with a pair of double acting hydraulic cylinders interacting with hydraulic accumulators to provide an energy efficient, robust hydraulic system design with a minimum number of components.

Abstract: A fluid supplying device comprises a reservoir configured to store a fluid and a conveying element disposed in or in fluid communication with a lower portion of the reservoir. The conveying element includes a rotatable shaft and a device configured to convey or move a fluid, e.g., a lubricant. A radial-piston pump having at least one radial-piston unit is in fluid communication with a fluid output of the conveying element. The pump comprises a shaft part rotatably coupled with the shaft of the conveying element. A motor drives both the conveying element and the pump. The motor, the conveying element shaft and the pump are sequentially arranged one after another in the axial direction of the shaft.

Abstract: A submersible pump includes a pump valve configured to switch the pump between first and second states in which a piston is respectively extended and retracted. The pump valve includes first and second components that reciprocate between corresponding first and second positions. The pump is in the first state when both components are in their corresponding first position. The pump is in the second state when both components are in their corresponding second position. Neither the valve nor the pump is hydraulically locked at any time during normal operation.

Abstract: A pressure exchanger transferring pressure energy from a liquid in a first liquid system to a liquid in a second liquid system, having a housing with inlet and outlet connection openings for each liquid and a rotor arranged in the housing for rotation about a longitudinal axis. Through rotor channels are arranged around the rotor longitudinal axis with openings on each axial end face of the rotor. The rotor channels are arranged for connection through opposing flow openings facing the housing to the connection openings of the housing. During rotor rotation high pressure liquid and low pressure liquid are alternately introduced into the respective systems. Liquid flowing to the rotor through the openings generates a circumferential force (cu) for driving the rotor, and starting at or following the openings a flow guiding configuration formed as a rotor channel flow diverting contour is arranged in the rotor channels.

Abstract: The invention relates to a hydraulic plant (I) that defines a path (4, 5, 6) for a forced water flow (E), and comprises at least one machine (1) of the turbine, pump or turbine-pump type, a member (8) provided with at least one deformable wall (81) and defining at least one closed volume (V8) with variable dimensions. The plant also includes means (9, 91) for supplying (Fg) the closed volume with a pressurised fluid. The member with a deformable wall (81) is mounted in a hydraulic duct (6) located downstream from a rotary portion (2) of the machine (1). The deformable wall defines, locally and downstream from the rotary portion (2), a modular section (S63) for the flow (E) passage in the hydraulic duct (6). According to the method of the invention, a pressurised fluid is injected (F9) into a closed volume having variable dimensions (V8) and defined by a member (8) provided in a hydraulic duct (6) located downstream from the rotary portion (2), in order to modulate the passage section (S63).

Abstract: A pump system for pumping a viscous material that includes N positive displacement pumps, where N is an integer greater than two, and a hydraulic drive. Each pump has an inlet and an outlet therefrom, and a pair of cylinders each with a piston movable in a reciprocating stroke cycle therein. The hydraulic drive is connected to the N positive displacement pumps to reciprocate the pistons within the cylinders. The stroke cycle includes a discharging stroke and a filling stroke. The discharging stroke and the filling stroke of the N positive displacement pumps are staggered from one another by 1/N stroke positions such that no two pumps have pistons in the same stroke position at the same time.

Abstract: Provided is a microchip having a liquid supply mechanism which can supply a solution in a micro flow path with a simple construction in which a drive source utilizing an osmotic pressure is arranged within the microchip and which controls the osmotic pressure by a control unit utilizing temperature or the like, whereby it is possible to effect drive control such as intermittent driving and continuous driving at a fixed velocity. The liquid supply mechanism using osmotic pressure includes an osmotic pump utilizing the osmotic pressure of a liquid filling chambers separated from each other by a semipermeable membrane, and a unit which varies the osmotic pressure by changing a condition of the solution in at least one of the chambers on the basis of a timing of a pumping operation.

Abstract: A hydraulic pump avoids problems with gas lock found in conventional pumps. The pump draws in production fluid in a lower pump volume during the pump's upstroke and diverts the produced fluid to an upper pump volume during the downstroke. Spent power fluid is communicated to the upper pump volume during the pump's upstroke. The pump piston in the upstroke expels the entire volume via a check valve that communicates the upper pump volume with a discharge outlet. The check valve increasing the discharge pressure of the upper pump volume, the upper pump volume of the spent power fluid being greater than the upper pump volume, and the upper pump piston compressing produced gas in the upper pump volume all combine to prevent or reduce the chances that the pump will gas lock during operation.

Abstract: A downhole ram pump. A downhole pump system includes a flow restricting device which variably restricts fluid flow through an opening, the restricting device vibrating in response to the fluid flow, thereby alternately increasing and decreasing the fluid flow through the opening; and a pump device which generates a pressure differential in response to vibration of the restricting device. Another downhole pump system includes a flow restricting device which vibrates in response to fluid flow through an opening, thereby alternately increasing and decreasing the fluid flow through the opening, a pressure differential across the restricting device variably biasing the restricting device to increasingly restrict the fluid flow through the opening, and the pressure differential alternately increasing and decreasing in response to respective alternate increasing and decreasing flow through the opening; and a pump device which generates differential pressure in response to vibration of the restricting device.

Abstract: A case drain circuit particularly well suited for use with a bulk fill subassembly or a vacuum fan assembly of an agricultural implement towed by a tractor or similar vehicle includes a pressure switch that may cause illumination of an in-cab warning light and/or sounding of an in-cab alarm when pressure in the case drain circuit exceeds a predetermined threshold. A fan is driven by a solenoid controlled hydraulic motor which is supplied hydraulic fluid under pressure from a flow control valve to the motor in accordance with electrical signals that are supplied to the solenoid by a controller. The case drain circuit provides a pathway along which leakage fluid from the motor may be delivered to a fluid reservoir, preferably carried by the towing vehicle. During undesirable high pressure conditions in the case drain circuit, the pressure switch provides a corresponding high pressure signal to the controller that in turn cuts electrical current to the solenoid to cut the flow of hydraulic fluid to the motor.

Abstract: The present invention relates to a submersible pump and a submersible pump system for pumping liquid to a marine structure, the pump being adapted to be located in a tube. The pump comprises an upper portion and a lower portion. The upper portion is adapted to be connected to means for suspending the pump in the tube. The pump has a vertical direction extending from the lower portion to the upper portion. The pump further comprises an inlet for allowing the liquid into the pump and an outlet for allowing the liquid out of the pump. The pump further comprises a sealing means located downstream of the inlet and the outlet in the vertical direction, the sealing means being adapted to seal against an inner surface of the tube. The invention further relates to an arrangement for hydraulic drive of the submersible pump and to a semi-submersible unit comprising the submersible pump system.

Abstract: A pump apparatus comprises a piston, which is provided displaceably along a first chamber formed in a body under the action of a pilot pressure, an indirect medium composed of a non-compressive fluid and which is to be pressed by the piston, and a diaphragm that is flexibly bendable in cooperation with the indirect medium. When the fluid is discharged from a discharge port, a change in volume caused by the displacement of the piston in the axial direction is identical to the change in volume caused by the displacement of the diaphragm in the axial direction.

Abstract: The turbocharger according to the invention has a rotor with a compressor wheel as well as a turbine wheel that is connected in a rotationally-fixed manner to the compressor wheel by means of a common shaft. The compressor wheel and the shaft are form-fittingly tensioned with one another, wherein respectively at least one or two torque-transmitting contact surfaces, which lie one atop the other, between components force-fittingly tensioned with one another, is provided with a friction-increasing coating.

Abstract: A hydro-pneumatic system has an air powered motor driving a hydraulic pump with a pressure limiting valve that turns off air flow to the air motor when a hydraulic pressure output by the pump at a sense port of the valve reaches a certain limit. A valve element of the valve has spring, hydraulic and pneumatic sections, with an unbalanced area of the hydraulic section in a sealed pressure chamber of a cartridge that is part of the valve housing. The pneumatic section extends out one end of the cartridge to fill a bore between the air inlet and outlet ports when the pneumatic section is extended, and allow air to pass when it is retracted.

Abstract: Systems and methods for providing a pump driving unit for driving a subterranean pump. The pump driving unit utilizes a single prime mover and a drive train for actuating multiple components required to drive the subterranean pump. Some implementations of the pump driving unit include phase separation devices, filtering units, and cooling units that may also be actuated by the drive train of the unit. Some implementations of the pump driving unit further include an enclosure and a platform for containing the unit and simplifying on-site installation.

Abstract: A medical fluid machine includes a housing providing a first wall and a second wall, the first and second walls at least partially defining a pump chamber. A fluid receptacle is located within the pump chamber, the fluid receptacle including first and second flexible membranes configured to be moved apart to accept a medical fluid and moved together to dispel the fluid. A medical fluid outlet is in communication with the fluid receptacle. A first valve arrangement is configured to enable medical fluid in a sufficiently air-free condition to be delivered from the receptacle through the medical fluid outlet to a patient. A second valve arrangement is configured to enable medical fluid with entrained air to be delivered instead from the receptacle through the medical fluid outlet to an entrained air destination.

Abstract: An electrochemically actuated pump and an electrochemical actuator for use with a pump. The pump includes one of various stroke volume multiplier configuration with the pressure of a pumping fluid assisting actuation of a driving fluid bellows. The electrochemical actuator has at least one electrode fluidically coupled to the driving fluid chamber of the first pump housing and at least one electrode fluidically coupled to the driving fluid chamber of the second pump housing. Accordingly, the electrochemical actuator selectively pressurized hydrogen gas within a driving fluid chamber.

Abstract: This invention relates generally to a pneumatic, hydraulic or other media driver, rotating-reciprocating cylinder apparatus to be mounted on the proximal end of CNC lathe spindles, vertical or inverted machining centers, hydraulic machining work cells or rotary transfer machines to actuate work holding chucks, work holding fixtures, clamping apparatus or work supports on the distal end of said spindles. More specifically, this invention relates to an actuating system with the capability of boosting the input hydraulic pressure to the holding device by a pre-set multiple up to 5000 psi where the boost pump is integral to and rotates with the clamp cylinder assembly.

Abstract: A multiple membrane pump for food liquids, comprising at least one duct for the compensated intake of the liquid, which is closed on itself in a loop and is provided with at least one intake port, at least one duct for the compensated delivery of the liquid, which is closed on itself in a loop and is provided with at least one delivery port, at least four branches, which provide a unidirectional connection between the intake duct and the delivery duct and are associated respectively with four liquid pumping membranes, a gearmotor assembly, which is associated with a crank system for actuating the membranes and is adapted to convert the rotary motion of an output shaft of the gearmotor assembly into a reciprocating motion, adjusted with an appropriate timing between two mutually opposite intake and delivery stroke limit positions, of each of the actuation axes of the membranes.

Abstract: A portable, fully submersible, high volume water pump, driven by a hydraulic powered motor is disclosed for rapidly supplying a large volume of water at useable pressures to an extinguishment operation involving a burning object or building, utilizing a local water source such as a pond, pool, portable basin, or municipal hydrant. The pump is fully portable and, in a preferred embodiment, used in conjunction with an extensible boom arm of a utility vehicle such as a fire engine. The pump can supply water from a source having as little as two inches of water depth and is simple in design and manufacturability.

Abstract: Disclosed is a pneumatically powered high-pressure and lightweight fluid pump. The pump is useful for pumping fuel for liquid rocket engines and for transferring liquids from one space vehicle to another. During operation of the pump, liquid is drained from a tank into a pump chamber and the chamber is then pressurized to deliver fluid. The chamber is then refilled from the main tank. An auxiliary chamber supplies fuel while the main chamber is being filled, thereby a steady stream is delivered from the pump. The auxiliary chamber is refilled from the tank while the main chamber is delivering fluid. In order to transfer fluid from the tank to the pump chamber, the pressure in the pump chamber is maintained at a pressure higher than the vapor pressure of the fluid being pumped but lower than the pressure in the tank.

Abstract: A compact helical compressor system for mobile use in vehicles is described. The system includes a helical compressor unit, a motor unit dedicated to the helical compressor unit for driving the helical compressor unit, and a control unit for adjusting a rotational speed of the motor unit and to generate a predefined discharge rate of compressed air from the helical compressor unit, independently of a drive assembly of the vehicle.

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.