Abstract: A refrigerant compressor, typically a swash plate type refrigerant compressor for compressing refrigerant gas containing therein lubricating oil, which has axially combined cylinder blocks having a plurality of cylinder bores in which a plurality of pistons reciprocate to implement suction and compression of refrigerant gas as well as discharge of the compressed refrigerant gas. The cylinder blocks further have a swash plate chamber for a swash plate supported by a sliding type thrust bearings, receiving the refrigerant gas returning from an exterior of the compressor, and an axially extending central through-bore for a drive shaft supported by radial bearings. The compressor has a lubricating oil system which includes a fluid passageway for supplying a part of the refrigerant gas containing the lubricating oil from refrigerant gas inlet passageways in the cylinder blocks into the central bore to lubricate the sliding type thrust bearings and the radial bearings.

Abstract: A compressor includes impeller rotors, a rotatable shaft upon which the impeller rotors are mounted, and tilting pad journal bearings having a ceramics bearing surface. The rotatable shaft is journalled by the tilting pad journal bearings which is arranged to be self generating and air or gas lubricated. The tilting pad self generating bearings reduce frictional losses and the ceramics bearing surfaces prevent problems commonly caused by high speed and temperature generated at bearings.

Abstract: The invention relates to a vane cell pump with a control plate (8) and an end plate (6), between which a pump package (1) is located. The control plate (8) and the end plate (6) have suction and compression chambers (12, 12A and 13, 13A, respectively) opposite one another. While the control plate (8) controls the inflow and outflow of oil, the end plate (6) has a function of guiding the oil. According to the invention, the control edges (15, 15A, 16, 16A, 17, 17A, 18, 18A) on the end plate (6) are recessed relative to the control edges of the control plate (8). This provision enables more-economical manufacture.

Abstract: A scroll compressor has a stationary scroll and a swivel scroll engaged with each other in a hermetic housing. A sealed terminal is provided to send signals outside of the housing from a sensor that is provided within the housing. The sealed terminal is inserted into a fitting hole that passes through the outer wall of the housing. A push nut having a plurality of nails is pressed into the fitting hole to hold the sealed terminal within the fitting hole. The push nut has a plurality of nails having an outer diameter slightly larger than the inner diameter of the fitting hole.

Abstract: A curvilinear peristaltic pump for pumping liquids through a resilient tube. The pump includes a curved concave platen against which a resilient tube is placed. A multi-lobed cam is positioned adjacent to the platen and tube. A plurality of pump fingers, each carrying a pinch finger, are mounted between tube and cam in a manner permitting radially outward movement of the pump fingers toward the platen. As the cam rotates, the fingers are pressed against the tube sequentially so as to pump liquid through the tube. A strain gauge beam is secured to the pump just beyond each end of the pump finger set. A sensing member secured to the free end of the beam is pre-loaded against the tube next to each endmost pump finger. When an input occlusion occurs, the tubing will collapse causing the beam to deflect toward the tube, changing its pre-load state. This motion will cause a negative voltage change indicative of the input occlusion.

Abstract: A pump configured so that tools are not required to remove the pump head and disassemble the plunger. A single large hand operated knob or head nut facilitates tool-less pump head removal. The pump head is guided into position in a manifold and held in place by the hand knob. The manifold is designed to receive all the external fluidic connections made to the pump head. Fluid paths to the pump head have been replaced with miniature face seals which facilitate high pressure sealing between the pump head and manifold. Low pressure tubing seals reside in a seal wash chamber or housing and are not attached to the head, eliminating the need for tooling to disconnect them during pump head removal. A tool-less plunger mechanism includes a nutcap assembly having a plunger socket receiving a plunger assembly including a sapphire plunger fixed to a plunger holder ball accommodated by the socket. The plunger assembly is captured within the socket by a plurality of cams.

Abstract: A microfabricated, remotely actuated fluid pump includes a LIGA-fabricated movable member disposed within a cavity. The LIGA-fabricated movable member and the cavity cooperate to (a) define a sufficiently small clearance therebetween to achieve effective pumping action while (b) presenting a sufficiently low-friction fit to enable remote actuation. Such a pump can take the form of a piston pump, a vane pump, a centrifugal pump, a gear pump, etc. Other fluidic devices including flow sensors, piston valves, hydraulic motors, nozzles, and connectors can be fabricated using similar principles.

Abstract: An evaporative cooler pump is modularized to readily receive pump impellers and pump volutes of different shapes and dimensions in order to optimize the evaporative cooler water pump performance. The flow of water through the pump is streamlined to improve the efficiency of the pump.

Abstract: The invention relates to a pumping device for volatile liquid, comprising a closed pump housing having an intake connected to a supply reservoir and at least one discharge connected to a delivery means. The device further comprises a liquid pump with a liquid inlet drawing into the interior of the pump housing and a pressure outlet connected to the discharge, a gas pump with a gas inlet drawing into the pump housing at a high level and a gas outlet debauching outside the pump housing and wherein the liquid pump is a hydrodynamic pump such as a centrifugal pump.

Abstract: A fuel injection pump for internal combustion engines which has a moving part supported in a housing bore and on its jacket face on one side, has an exit opening that is under high pressure, and whose bearing is improved by virtue of the fact that on the jacket face of the part or in the wall of the housing bore, at least one pressure compensation is provided. The compensation face is connected to a high pressure source, is disposed on a side of the jacket face of the part which side is remote from the exit opening, and is continuously covered by the wall of the housing bore. As a result, a compensation of the pressure action by means of the pressure field prevailing in the region of the exit opening occurs so that an improved, less damage-prone bearing is produced with a greater high pressure tightness of the moving part.

Abstract: A compressor includes a housing body and a drive shaft rotatably supported in the housing body. A swash plate is mounted on the swash shaft. Cylinder bores are defined in the housing body. Pistons are operably coupled to the swash plate and are disposed in the cylinder bores. The swash plate converts a rotation of the swash shaft to a reciprocating movement of the pistons along an inner surface of the cylinder bores. Each piston compresses gas supplied from a suction chamber to the associated cylinder bore and discharges the compressed gas to a discharge chamber. Deformation of the inner surface of each cylinder bore is reduced by utilizing pressure of the gas compressed in the cylinder bore.

Abstract: In a reciprocating compressor in which a suction chamber (7) extends around a discharge chamber (6) parallel to suction, a discharge gas conducting passage (6c) is connected to the discharge chamber and is adjacent to a suction gas inlet passage (7a) in a predetermined direction orthogonal to the plane. The suction gas inlet passage communicates with each of the first and second opposite ends of the suction chamber so that gas is supplied into the suction chamber through each of the first and second opposite ends thereof. A plurality of compression elements are arranged along the suction chamber and connected to the discharge chamber and the suction chamber. Each of the compression elements have a piston (16) which reciprocates to introduce the gas from the suction chamber, to compress the gas, and then to discharge the gas into the discharge chamber.

Abstract: A fuel injection pump, in which there is provided in a distributor of the fuel injection pump, a longitudinal bore which connects a pump working space to a control point on the distributor and which is fashioned in the distributor from one end face of the distributor. For sealingly closing this longitudinal bore, there is provided a pin which is inserted into a transverse bore intersecting the longitudinal bore and which thus has a sealing fit influenced by the pressure in the longitudinal bore.

Abstract: A portable pump assembly is provided. The pump assembly includes a pump and various accessories that enable the pump or alternatively, the pump and a pouch containing a liquid for injection, to be fixed to various accessories without requiring modification of the pump box and without requiring specific fixing apparatus for each of the accessories used with the pump.

Abstract: A hermetic type compressor which makes opening and closing of a exhaust valve installed inside a reentrant groove formed in a cylinder head smooth, and prevents leakage of refrigerant from the exhaust valve by fabricating a valve seat surface to be in the same height as that of a valve fixing surface.

Abstract: Disclosed herein is a fuel pump comprising a housing including therein a high pressure fuel chamber, a fuel outlet valve communicating with the high pressure fuel chamber and being operable to prevent fuel inflow and to permit fuel outflow when the fuel pressure is above a predetermined level, a fuel inlet valve communicating with the high pressure chamber and being operable to prevent fuel outflow and to permit fuel inflow, and a bearing bore extending from the high pressure chamber, a rod slideably and sealingly supported in the bearing bore for movement relative to a retracted position, and structure located in the housing for displacing the rod from the retracted position and in the direction toward the high pressure fuel chamber through an initial stroke length without encountering substantial resistance and thereafter displacing the rod through a subsequent stroke length which is effective to highly pressurize the fuel in the high pressure fuel chamber.

Abstract: An advance mechanism for a pump comprises a fluid operable piston arranged to have pressurized fluid applied to a first end thereof to adjust the axial position of the piston. The arrangement further comprises means for applying fluid under pressure to a part of the piston remote from the first end thereof in order to apply a torque to the piston. In one embodiment, the means for applying comprises a passage extending within the piston, the passage communicating with the first end of the piston such that high pressure fluid is received by the passage.

Abstract: A pump chamber for compressing a liquid such as engine fuel is formed inside a bellows, and the liquid is aspirated into the pump chamber from a suction check valve when the bellows elongates. After the liquid in the pump chamber is pressurized by the contraction of the bellows, it is discharged from a discharge check valve. By providing a fill member for eliminating a dead space in the pump chamber, the formation of air bubbles in the pump chamber is suppressed.

Abstract: A reciprocating piston type compressor for compressing refrigerant gas includes a plurality of pistons slidably provided within cylinder bores for reciprocation. A pair of housings are mounted to the either ends of the cylinder block with valve plates therebetween. The housings include at least a refrigerant gas suction chamber which is fluidly connected to the cylinder bores. An oil sump is provided for containing lubricating oil. An oil pump is provided for distributing the lubricating oil to the compressor elements. The oil pump includes oil suction which is fluidly connected to the oil sump through a oil suction passage. The pressure in the refrigerant gas suction chamber is introduced into the oil suction chamber to direct the lubricating oil into the oil suction chamber from the oil sump during the initial stage of the starting of the compressor.

Abstract: A variable capacity single headed piston swash plate type refrigerant compressor is provided with a double fulcrum hinge mechanism having a pair of hinges for providing a pivotal connection between a rotary support element of a drive shaft and a swash plate assembly, causing reciprocation of a plurality of single headed pistons in cylinder bores for compressing a refrigerant gas. The pair of hinges of the double fulcrum hinge mechanism cooperate to absorb reaction forces of the compression and suction of the refrigerant gas acting from the pistons on the swash plate assembly to thereby prevent application of a local load to a sleeve element on which the swash plate assembly is turnably mounted.