Abstract: A rotor for a supercharging device may include an arrangement; the arrangement may include a compressor wheel operatively coupled to a turbine wheel. A cup-shaped bearing bush configured to receive a radial air bearing may be arranged on at least one longitudinal end of the arrangement. The bearing bush may define an interior including at least one hollow space and a plurality of stiffening ribs extending into the at least one hollow space.

Abstract: A fuel supply system for a vehicle uses a seal-less piston LPG injunction pump which pumps fluid from a storage tank to an engine. The pump uses the vehicle's pneumatic air system, wherein the pressurized air of this system alternatingly drives an actuator magnetically coupled to a piston.

Abstract: A pump assembly includes a housing and first and second valves. The housing has a fluid inlet port and a fluid outlet port. The first and second valves are substantially identical valves both including a mounting portion, a valve seat and a valve body. The mounting portion has a first end and a second opposite end. The first and second ends are both selectively mountable to a conduit defining a fluid path. The valve seat is interconnected to the mounting portion. The valve body is interconnected to at least one of the mounting portion and the valve seat for movement relative to the valve seat between a seated position and a closed position. The valve body includes a first side and a second side and is operative to seal against back flow from the first side and open to positive pressures on the second side. The first valve is mounted to the fluid inlet port with the first end such that the first valve normally functions to only permit fluid to flow into the housing.

Abstract: A hydraulic drive system comprises a hydraulic actuator comprising a piston reciprocable between two cylinder heads for actuating a machine. A flow switching device reverses the direction of hydraulic fluid flow to and from chambers on opposite sides of the piston. The piston stops at the end of each piston stroke when a shuttle valve associated with the piston opens to allow hydraulic fluid to flow between the chambers cancelling the differential pressure that acts on the piston to cause reciprocal movement. A controller is programmed to determine when the piston reaches the end of each stroke based upon at least one of hydraulic pump speed, hydraulic fluid pressure, or elapsed time, with each of these measured during each stroke. The controller then sends an electronic signal to command the flow switching device to reverse the direction of hydraulic fluid flow.

Abstract: The invention relates to a device, a method and the use of the device, for transferring linear movements. The device consists of a hollow cylinder, in which a pressurized space is found, wherein the pressurized space is bounded by a connection flange, which is attached to a terminal opening of the hollow cylinder, and a movable piston flange, which is applied in a pressure-tight manner to the inside of the cylinder wall of the hollow cylinder, and wherein the connection flange and the piston flange are joined together by means of a reversibly deformable component.

Abstract: The invention pertains to a method and a device for desalting water by reverse osmosis, particularly for desalting seawater, in which saltwater is introduced under a first pressure into a pressure-compensation device and conducted from pressure-compensation device at a second, higher pressure into a membrane module, wherein desalted water and concentrated saltwater are conducted out of membrane module, wherein the concentrated saltwater conducted out of membrane module is continuously introduced at roughly second pressure into pressure-compensation device and used there to apply roughly second pressure to saltwater introduced into pressure-compensation device and to introduce saltwater into membrane module, and wherein the introduction of concentrated saltwater into pressure-compensation device and the conduction of concentrated saltwater out of pressure-compensation device are accomplished by means of controlled main valves.

Abstract: A high-pressure fluid is continuously generated with high efficiency without causing pulsation of pressure by reciprocally moving a piston having first, second and third chamber sections under the control of an actuator including an operating pressure source and a directional control valve. With the reciprocating motion of the piston, liquid or fluid such as gas is fed into the first, second and third chamber sections in sequence through check valves and finally discharged outside at high pressure. The actuator is operated hydraulically, mechanically or electrically.

Abstract: Transport system with several devices (1) for transporting powder, where each device (1) has a transfer chamber (3) into which a supply line (6) and a discharge line (8) for the powder open, and means to generate a negative pressure in the transfer chamber (3), where the means to generate a negative pressure in the device (1) has a piston (11) which is moveable in the transfer chamber.

Abstract: An automatic oil pump includes a drive chamber, having a reciprocal driving device, and an oil chamber, having a sucking device, located on two sides of a main body. The reciprocal driving device has a piston unit having a valve chamber at its center and a balance valve and is pushed by a spring. The drive chamber has grooves on its inside wall. The piston unit has two channels, allowing air to flow into the valve chamber past two sides of the piston unit. On the piston unit is a driving rod. The driving rod penetrates into the main body and reaches into the oil chamber. A hermetic cover and a movable piston are attached to an end of the driving rod. On the wall of the piston are pluralities of through holes. The reciprocal driving device drives the piston in the oil chamber to move reciprocally, so oil is sucked into and out of the oil chamber continuously. Thereby, oil sucking speed and volume are upgraded to save time and labor, and oil pumping efficiency is enhanced.

Abstract: In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons. However, leakage of hydraulic fluid can lead to an imbalance of the two cylinders. In the invention two position sensors (52?, 52?) are provided, which are arranged at a defined distance from one of the ends of the drive cylinders and which respond to a drive piston (30?, 30?) that is passing by. To prevent the formation of concrete clots inside the delivery cylinders (10) and to prevent the occurrence of a slamming when the drive pistons (30?, 30?) reach their end of travel, the invention provides that both position sensors (52?, 52?) are arranged at a distance from the piston rod-side ends of both drive cylinders (24?, 24?) and, in addition, a correcting sensor (54) is arranged at a defined distance from the piston head-side end of one of the drive cylinders (24?).

Abstract: An improved air compressor powered by water having an automatic water valve regulation mechanism. The air compressor includes a resiliently biased piston within a liquid chamber and a ram within a compression chamber, the ram being conjoined with the piston. Inlet and outlet valves for controlling the flow of water with respect to the liquid chamber are provided in one end of the compressor. Ports for the inlet and outlet valves are preferably aligned parallel to the axis of piston reciprocation such that water flows through the ports in the same direction as the direction of piston movement. The automatic valve regulation mechanism includes a positioning disc and positioning spring, together holding each of the water valves in one of two positions.

Abstract: A metering device contains a rotor which defines elongate chamber, there being a shuttle contained within the chamber movable between two terminal end positions. Frusto-conical surfaces defined on the rotor cooperate with annular members defining corresponding seats. One passage extends from one end of the chamber to one frusto-conical surface, and another passage extends from the other end of the chamber to the other frusto-conical surface. Each annual element defines a respective inlet and outlet for fluid and a shuttle is present within the chamber. As the rotor rotates, the shuttle effects a shuttling movement thus measuring dispensed volumes of fluid. A sensor is provided to detect physical contact of the shuttle with the end of the chamber to cause the rotor to advance.

Abstract: An intensifier pump system includes a supply pump for delivering fluid products at an intermediate pressure. The products are delivered to one or more intensifier pumps that take advantage of hydraulic intensification to expel the product at high pressures to assure continuous product deployment in various systems. After an extension cycle in one of the intensifier pumps, product is delivered from the supply pump at a pressure sufficient to retract the intensifier pump and fill the chamber with fluid.

Abstract: The piston of a master cylinder in the power train of a motor vehicle is made, at least in part, of a thermosetting plastic material and cooperates with one or more annular seals to ensure that a source of hydraulic fluid is communicatively connected with the chamber in the housing of the master cylinder when the piston is moved by one or more springs or otherwise in a sense to increase the volume of the chamber. When a pedal or another actuator causes the piston to expel pressurized fluid from the master cylinder into a slave cylinder, the seal or seals cooperates or cooperate with the housing and/or with the piston of the master cylinder to seal the source from the chamber of the master cylinder. The slave cylinder can actuate the friction clutch between the prime mover and the transmission in the power train of the motor vehicle.

Abstract: A hydraulic drive system for providing a smoothed or near sinusoidal output flow characteristic for reciprocating piston pumps. The device occupies a smaller footprint than conventional mechanical reciprocating pumps and allows a standard reciprocating pump to operate at its maximum rated pressure while retaining its maximum rated flow. Several embodiments are disclosed and the drive system may be coupled to standard duplex and triplex pumps. A solution to hydraulic hammer caused by rapid flow reversal in the hydraulic control valves used within the system is presented.

Abstract: Fluid containing organic substances, which has not processed yet, is fed to a plurality of cylinders, using a slurry pump. A free piston is included in each cylinder, the fluid which has not yet been processed is introduced into one of two chambers in the cylinder partitioned by the piston, and processed high-pressure fluid which has been processed is introduced into the other one of the two chamber in the cylinder. The piston pressurizes the fluid with which the cylinder has been filled up. A pressure holding valve is provided in a processed high-pressure fluid system to pressurize an organic substance processing system, and this pressure holding valve suppresses changes in the pressure in the processed high-pressure fluid system.

Abstract: Pressure amplifier mounted at the lower end of a drill pipe for deep drilling to generate an increased fluid pressure. A piston with a pressure stroke and a return stroke between end positions in a cylinder has a large piston area which during the pressure stroke is subjected to the drilling fluid pressure, a first opposite piston area and a second opposite and small piston area which during the pressure stroke generates an increased pressure in a smaller portion of the drilling fluid flow. A valve arrangement controls drilling fluid flows to and from the piston. For each end position of the piston there is provided at least one moveable valve control element which is adapted to be moved by the piston at either end position, in order to activate the valve arrangement.

Abstract: A gas compressor includes a housing, a separating element in the housing, and a piston guided for movement along the separating element by a drive mechanism between two dead center positions. Gas is compressed in a three-stage compression cycle by the piston in three separate gas chambers arranged in series in the housing. Pressure increases in the gas are easily feasible from very low to very high pressures, for instance from 5 to 400 bar, based on a relatively small installation. The gas compressor includes only a few wear parts for low manufacturing and maintenance costs and for fail-safe operation.

Abstract: The disclosed well purging and sampling pump has a hydraulically actuated rim driven cylindrical pumping piston assisted by an internal precharged gas return spring all mounted coaxially within a pump housing cylinder suitable for being lowered into and supported by the hydraulic conduits for actuation and pump delivery.

Abstract: A method for supplying at different pressures natural gas from a gas field under control of a continuous gas flow and the field pressure thereof and an apparatus for carrying out the method. The gas flow is received directly in and contained in two separate volumes constructed as a first variable volume and a second variable volume which are each cyclically varied in size synchronously by alternately increasing and decreasing the size of a corresponding volume under control of the gas flow. The increasing of the first volume effects a pressure reduction of the gas received therein for delivery to a distribution network at a reduced pressure. Reducing the size of the first volume discharges the gas at the reduced pressure and the cyclical varying of size alternately reducing and increasing thereof of the second volume under control of the gas flow effects increasing of the gas pressure to a desired higher pressure.

Abstract: A pressure fluid actuated lubricator having a housing (46), a pressure fluid channel (43, 42, 21) leading from an inlet opening (2) to an outlet opening (7), a reservoir (44) for a lubricant and a discharge device (19) for the lubricant. The reservoir (44) is arranged to be movable by being acted on by the pressure fluid and transfers the pressure force to the lubricant and the discharge device (19). The reservoir is sealed against the penetration of pressure fluid and decreases in effective volume in proportion to the discharged amount of lubricant.

Abstract: A long stroke deep well pumping unit which employs a fluid motor connected with a polish rod by using a plurality of belts, fixed at either end, to reciprocate the sucker rod through repeated long strokes with a minimum of stress and shock to the sucker rod during directional change.

Abstract: A pump is adapted for discharging a very small quantity of a liquid and has a discharge port opening and shut valve, discharge element and liquid drawing passageway opening and shut valve. The discharge port opening and shut valve includes a rod-shaped element which can advance to and retract away from a discharge port. The tubular discharge element and opening and shut valves mate relatively movably with each other coaxially with the rod-shaped element on the cylindrical surface of the red-shaped element. The advancement of the discharge element discharges the liquid which has been introduced into the liquid drawing passageway and regulated by the opening and shut valves to a predetermined amount.

Abstract: A double acting and at the limit positions automatically reversing pressure intensifier. A case has a first bore hole and a second bore hole. A pressure intensifier piston slides in the first bore hole of the case and subdivides the first bore hole into two low pressure work spaces and is furnished with two flat control grooves at the outer circumference and with two cylindrical bore holes. Two high pressure pistons are solidly mounted to the case for sliding relative to and inside of the two cylindrical bore holes of the pressure intensifier piston. A check valve is disposed in the pressure intensifier piston and connects the two bore holes. A control slider is disposed in the case and furnished with two flat control grooves about at its middle region which connect to respective front faces of the slider via cross bore holes and axial bore holes in the control slider. A wide bypass groove is disposed on the outside of the control slider.

Abstract: Disclosed is a device for converting pressure fluid input of one fluid to pressure fluid output of a second fluid without contaminating either fluid. The transformation is accomplished by a unique H section piston which cooperates the internally protruding endcaps enclosed in a double ended cylinder; the piston having a central control valve which reverses the piston on control pin end of stroke contact. Positive reverse action is obtained by means of endcap plungers which operate in response to piston position and pressure of the one fluid. The device is double acting and is enclosed totally within a single cylindrical module which is compact and inexpensive to manufacture.

Abstract: The invention concerns a reciprocating pump whose plunger (10) is connected with a plunger rod (12) that runs in a stuffing box (13) coordinated with the pump cylinder (9) cap and is reciprocated hydraulically, where the cylindrical walls of the pump cylinder (9) are provided, over their entire length, with flow-through openings for a cooling medium passing through them, and the flow-through openings in the cylindrical walls of the pump cylinder (9) are connected to a coolant circuit.

Abstract: In a hydraulic double-acting hydropneumatic pressure multiplying device suited for generating hydraulic pressure, and comprising a cylinder within which a piston is slidably mounted. The multiplying device is capable of generating hydraulic pressure in both the backward and forward strokes of the piston within the cylinder. For this purpose, the cylinder is closed at the bottom by a lower cap having an upwardly extending plunger received within a portion extending upwardly from the piston. The cylinder also provides an upper cap with a dome and the upwardly extending portion of the piston is reciprocating within this dome, thus defining between the portion of the piston and the dome a first pressure generating chamber, and within the upwardly extending portion of the piston and the plunger of the lower cap a second pressure generating chamber for obtaining hydraulic pressure in both of the strokes of the piston.

Abstract: A well pump, for pumping well fluid up a tubing string, the pump having inner and outer housings, inner and outer barrels, and upper and lower valves. A hydraulic fluid line extends downward through the casing, outside of the tubing string, from the surface to the housing, below the outer barrel and outside the inner barrel, to cause the outer barrel to move up and down. A wireline tool an be used to install and to remove the inner and outer barrels from the well pump.

Abstract: A hydraulically powered reciprocating downhole pump having improved means for reliable and efficient operation is disclosed in which a reversing valve (8) is hydraulically shifted past center position so as to effect a smooth continuous operation. Inlet valves (5) and outlet valves (86) are provided so as to most fully utilize space available within diameter constraints for rapid and efficient operation.

Abstract: A fluid pressure intensifier characterized by unitary construction of a bistable control mechanism, and a reciprocating assembly within a main cylinder providing unrestricted flow and optional modes of operation.

Abstract: A fluid intensifier characterized by a bistable control mechanism which "remembers" the point in the operating cycle it is in. The bistable control mechanism controls the movement of a reciprocating assembly located within a main cylinder assembly. The reciprocating assembly co-acts with a stationary assembly to pump high pressure fluid from the main cylinder assembly. The fluid intensifier can be powered by an interruptable fluid source since the fluid intensifier will resume operation from its stopping point when fluid pressure is reapplied.

Abstract: A hydraulic intensifier comprising a stationary working fluid plunger connected to a power fluid cylinder and piston arrangement disposed around the plunger. The power fluid piston is disposed around and integral with a working fluid cylinder member which is reciprocable with respect to the working fluid plunger to displace working fluid from the intensifier. A head member arranged at one end of the plunger includes a cavity for receiving the working fluid discharge valve which is coaxial with the working fluid plunger and in communication with a working fluid cylinder chamber by way of an elongated passage within the plunger. The working fluid inlet valve is disposed in a removable cover member attached to the head of the working fluid cylinder. The power fluid cylinder is removably connected to the head member by a releasable flange clamping connector assemblies. The inlet and discharge valves are accessible through valve covers which are held in assembly with the heads by similar connector assemblies.

Abstract: The present invention provides a hydraulic pumping unit, which is capable of pumping oil and other fluids from the downhole of a well. The pumping unit includes a frame and multi-cylinder system which is attached to the frame in such a manner that it is gravity centered. The bottom of the multi-cylinder system can be attached to the rod system of a well, and when the multi-cylinder system is expanded and contracted, the rod system and moving portion of the downhole pump of the well will be reciprocated back and forth, to bring (pump) oil or other fluid to the surface of the earth.Many other features and facets of the pumping unit are also disclosed.

Abstract: A Stirling cycle engine is provided with a variable volume displacer piston for displacing a working fluid alternately between the hot and cold ends of the engine. The drive shaft for the displacer piston is hollow and communicates with the interior variable volume of the displacer piston. As the displacer piston volume increases it draws a fluid being pumped into the system through a check valve. As the volume of the displacer piston decreases the fluid being pumped is ejected under pressure through another check valve. Movement of the displacer piston is accomplished by mechanical or fluid programming and the power for driving the displacer piston may be derived from the fluid being pumped.

Abstract: A multi-stage, reciprocating, positive displacement compressor, in which the various stages are coaxial one with the other. The compressor has a double acting, monorod, hydraulic jack and at least one piston guided to slide hermetically in a cylindrical chamber that is fixed to the support structure of the compressor; a cylindrical tubular liner that is fixed coaxially, at one extremity, to the aforementioned piston and points towards the jack. The cylindrical chamber is sealed, at the extremity pointing towards the jack, by a guide ring for the liner and, at the other extremity, by a disk. The piston and the cylindrical liner define in the cylindrical chamber the first and the second stage in the compressor. Third and fourth stages of the compressor are formed in a second cylindrical chamber coaxial with the first chamber and secured to the disk sealing the first chamber.