Abstract: First and second fluid pressure chambers are formed in both sides of a movement direction of a cam ring swingably placed within a pump body. A spool of a control valve is moved due to a pressure difference between the front and back of a metering orifice. Fluid pressures of the fluid pressure chambers are controlled. The cam ring is swung. Further, a solenoid for giving thrust in an axial direction thereof to the spool of the control valve and electronic control device for controlling driving of the solenoid are provided. The electronic control device has a steering sensor and determines a steering direction based on a signal from the steering sensor and also calculates a steering speed to the steering direction and controls a driving current of the solenoid in response to this steering speed and changes a discharge flow rate of a pump.

Abstract: An apparatus for electrostatically pumping fluids without passing the fluids through the electric field of the pump is contemplated. Electrostatic forces are preferably used to move the diaphragms in one direction, while elastic and/or other restorative forces are used to move the diaphragms back to their original un-activated positions. In some embodiments, this may allow fluid to be pumped without passing the fluid between actuating electrodes. This may be particularly useful when the fluids have dielectric, conductive, polar or other qualities that may affect traditional electrostatic pump performance. Pumps having various elementary cells are contemplated, including two-celled pumps disposed within a single chamber and pumps having greater numbers of cells wherein each cell is disposed within a different chamber.

Abstract: A reciprocating compressor includes a compressing unit fixed by a first frame inside a hermetic casing, for compressing gas, a driving motor fixed by a second frame and a third frame inside the hermetic casing, a spring seat member connected with a piston of the compressing unit and positioned between the first frame and the second frame, a plurality of connection members respectively connecting the first and second frame and having a predetermined space in the circumferential direction of the first and second frame, a first spring installed between the first frame and the spring seat member, a second spring installed between the spring seat member and the second frame, wherein each end of the first and second springs is positioned in a space among the connection members. Therefore, the compressor can be miniaturized and the installation space of the compressor can be substantially reduced.

Abstract: A manual/pneumatic oil pumping device having a housing defining therein an oil reserving space and an upper cover. A floating board is disposed in the oil reserving space. The upper cover is equipped with a manual air sucking mechanism, a pneumatic air sucking mechanism and an oil sucking tube. The pneumatic air sucking mechanism is provided with a controlling unit. The control controlling unit includes a seat body, a valve body, a sleeve and a movable block. The movable block is fitted in the sleeve and has a downward extending projecting post. When the oil is pumped to fill up in the oil reserving space, the projecting post is upward pushed by the floating board to make movable block move upward. At this time, the leakproof washer on the movable block seals the through hole of the seat body and the push pin pushes the valve body away from the through hole so as to block the air sucking passage of the pneumatic air sucking mechanism.

Abstract: A pump system for delivering cryogenic liquids is proposed that is suitable, for example, for refueling motor vehicles with H2. It consists of a container for receiving the cryogenic liquid, in which at least one pump is arranged that is designed as a reciprocating pump with connecting rod actuation and spring recover. Pump cylinder (10) of the reciprocating pump is divided by means of plunger (24, 37) into two chambers (a and b) that are arranged on the pressure side or the induction side. By exerting tensile forces on connecting rod (29), in the pressure stroke the cryogenic liquid that is located in the container is initially trapped in chamber (b). When connecting rod (29) is returned to its starting position by return spring (23), the liquid that is trapped in chamber (b) is then hurled without pressure into chamber (a). In the subsequent pressure stroke, the liquid is finally released via a gap (d) to a pressure housing and from there to the consumer by exerting tensile forces on connecting rod (29).

Abstract: In a flat-type blower unit disposed in a narrow space between a bottom portion of a front seat and a vehicle floor in a vertical direction, a motor-attachment bracket part for attaching a fan motor is integrally formed with a drive circuit cover part for covering a motor drive circuit to construct a motor attachment bracket having heat-generating components which generate heat when being operated. The motor attachment bracket is disposed to protrude radial outside from the fan motor, so that a dimension of the motor attachment bracket in the vertical direction can be reduced.

Abstract: A fuel delivery unit (2) for delivering fuel from a tank (1) in which a support (6) connects a flange (4) to a surge chamber (5) through a pivot bearing (12). The pivot bearing (12) makes it possible to introduce the delivery unit (2) in an elongated state into the fuel tank (1) through a particularly small opening. Within the fuel tank (1) the surge chamber (5) is locked in its designated position.

Abstract: The present invention is directed to a centrifugal pump wherein voltage and current data are detected from voltage and current sensors in the pump motor. A power signal is then generated from the voltage and current data and spectrally analyzed to determine the low flow or cavitation in the pump. As such, unwanted operational conditions resulting from improper pump operation may be detected and a warning or maintenance flag provided without additional transducers and other instruments on the motor or pump.

Abstract: The invention is drawn to an apparatus for supplying fluid, such as air, under pressure to a fluid accommodating means such as an air mattress and automatically adjusting the fluid pressure. The apparatus has a coupling device which attaches the apparatus to the air mattress. A housing encloses a motor, an impeller, a two-way valve and a solenoid. The solenoid opens the two-way valve to allow inflation or deflation of the air mattress. The motor is reversible and the impeller is used to force fluid into or out of the mattress. A controller is used to inflate and deflate the mattress. The controller can be attached to the apparatus or it can be a remote control.

Abstract: A pump housing (14, 16) has a fan guard (40) secured to the end of the housing by four crescent-shaped tabs (60) fitting into four crescent-shaped cast-in recesses (66) of the housing (14, 16) and ears (68) of the tabs (60) fitting into cast-in holes (70) in the housing (14, 16). The ears (68) and boles (70) on opposite sides of the housing (14, 16) are aligned along a common axis (80, 82). The ears (68) are tapered at their leading ends (90) and squared off at their trailing ends (92), and the guard (40) has a radial projection (56) that fits into an opening in the housing (14, 16).

Abstract: A fluid discharging device is provided with diaphragm members 20 and 30. The diaphragm member 30 being a valve member comprises an outlet 35 and a suction passage opening and closing portion 33, and can be moved forward and backward relative to the diaphragm member 20 being a pump member. The diaphragm member 20 comprises an outlet opening and closing portion 25 capable of opening and closing the outlet 35 and a measuring portion 26 capable of changing the volume of a measuring space 42. An outlet opening and closing means 50 opens and closes the outlet 35 by moving the outlet opening and closing portion 25 backward and forward relative to the outlet 35, and opens a liquid suction passage 40 by detaching the suction passage opening and closing portion 33 from the diaphragm member 20. A diaphragm moving means 55 changes the volume of the measuring space 42 by moving the measuring portion 26 forward and backward.

Abstract: A pneumatic driving device and the associated method for micro fluids, wherein the pneumatic driving device for micro fluids is constructed by connecting a fluid pipe with a structure that is formed by two gas stream inlets, a gas stream fender, a gas stream flow path and a gas stream outlet. The suction, exclusion and stagnation for the micro fluids inside the fluid pipes can be accomplished by adjusting the flow rates of the gas streams into the device at the two gas stream inlets. In the invention several pneumatic driving devices are connected to form a single recursive pneumatic driving device by the concept of recursion, and the micro fluids inside several fluid pipes can be controlled to mix or to separate through the recursive pneumatic driving device by adjusting the flow rates of the gas streams into the device at different gas stream inlets.

Abstract: A dispensing system for petrol pumps, comprising a pump, a dispensing valve in a petrol pump nozzle and an electrically controllable solenoid valve (10), characterized in that the solenoid valve (10) includes a directly acting principal valve (18) and a bypass valve (30) arranged so as to bypass the principal valve (18), and a solenoid drive (34) by which in case of a differential pressure present above the sealing seat (24) of the principal valve (18) at first only the bypass valve (30) is able to be switched to the open position, and only after a pressure compensation has, occurred at the sealing seat (24) of the principal valve (18) by the opening of the bypass valve (30) is the principal valve (18) also able to be switched to the open position.

Abstract: The present invention is a submersible pump system that includes a main housing, which is watertight and contains a submersible pump therein. There is a liquid suction inlet connected to the main housing and adapted for functional connection to a liquid source. This may be a direct pipe connection, or an open intake. There is also a one way check valve functionally connected to the main housing and located downstream from the liquid suction inlet, adapted to permit liquid to flow from the inlet to the main housing and to prevent liquid from oppositely flowing. The submersible pump has electrical power wiring and control wiring connected thereto and extending out of the main housing with a watertight seal. The pump has a submersible pump inlet to pump liquid from the main housing, and a pump outlet directly connected to a liquid flow outlet extending out through the main housing for liquid distribution therefrom.

Abstract: In a motor-driven air pump, a bottom wall and a surrounding barrier wall cooperatively confine a receiving space in which an impeller is mounted. The barrier wall is provided with angularly displaced first and second internal ports that communicate fluidly with first and second chambers, respectively. A first external port is disposed upstream of and communicates with one of the first and second chambers. A second external port is disposed downstream of and communicates with the other one of the first and second chambers.

Abstract: The invention relates to a piston pump for increasing pressure for liquids, in particular for the camshaft phase adjustment of reciprocating internal combustion engines, said piston pump advantageously being integrated into the housing of the cylinder head. The piston pump for increasing pressure is defined in that it increases an existing fluid pressure to a required fluid pressure and keeps this pressure virtually constant. The piston pump for increasing pressure is advantageously pre-assembled in a sleeve.

Abstract: An inlet port filter plate for attachment between a compressor inlet port and a suction hose assembly. The inlet port filter plate includes a main body and mounting surfaces for attachment between the compressor and the suction hose assembly or between the compressor and the compressor hose block. The main body defines a passage that allows for refrigerant flow through a filter which is positioned in the passage. The filter is adapted to stop debris in the refrigerant flow.

Abstract: A gas suction apparatus for a reciprocating compressor, including a piston having a gas flowing passage where refrigerant gas flows, being inserted in the compression space formed in a cylinder enabling linear reciprocating movement, a fixing means combined to the piston and an inertia valve inserted in the gas flowing passage of the piston movably having a moving distance restricted by the fixing means, for opening and closing the gas flowing passage moving according to the pressure difference and inertia generated by the linear reciprocating movement of the piston can minimize dead volume of a gas compression space, ease controlling of a stroke and make the suction flowing of gas smoothly by an excellent reliability of response of valve, thus to improve compression performance. The damage of the component can be also prevented by increasing structural strength, thus to improve reliability.

Abstract: A hydrostatic axial piston machine has a cylinder block with bores holding reciprocating pistons, a swashplate supporting the pistons, and control cams to supply the bores with hydraulic fluid. The swashplate is a pivoting cradle mounted on friction bearings in a cradle receptacle. Hydraulic fluid channels empty into the cradle receptacle and are in communication with supply channels in the cradle connected to the control cams. An actuator piston to adjust the cradle is located between two friction bearing segments of the cradle receptacle and has a toothed rack segment engaging a gearing segment on the back side of the cradle.

Abstract: A method and system for dynamically determining a vapor pressure of a fluid passing through a pumping system by diverting a portion of the fluid from the pumping system into a chamber, isolating the diverted fluid from the pumping system, evacuating the chamber and measuring the vapor pressure of the isolated fluid. In another aspect of the invention, a temperature compensation device is included in the chamber to alter the chamber fluid temperature to insure that the chamber fluid temperature is substantially the same as the fluid in the pumping system.