Abstract: The invention relates to a pumping set for plants carrying water, comprising a split-tube motor and a rotary pump driven by the same, the impeller of which is located on the extremity of the shaft present in the pumping space, said shaft being carried by two radial anti-friction bearings situated at either side of the rotor stack of laminations, and consists of ceramic material at least in the area of these anti-friction bearings and is longitudinally movable with respect to the ceramic bearing rings of the radial anti-friction bearings under forces acting axially on the impeller, the maximum length of this longitudinal displacement being limited by two axial anti-friction bearings. An annular groove is provided in the shaft directly adjacent to each of the two bearing areas of the radial anti-friction bearings, that is to say in each case adjacent the extremity of these bearing areas directed towards the impeller, and that the said distance is smaller than the width of the annular grooves.

Abstract: In a vane pump a hollow cylindrical rotor (7) is mounted for rotation about its axis within a housing (1) and is arranged to be driven by a belt driven pulley (54) mounted on one end (19) of the rotor. Extending eccentrically within the rotor (7) is a shaft (11) which has its opposite ends (10) and (24) fixed in passages (9) and (23) respectively in the end portions (5) and (15) of the housing (1) so that the shaft (11) is not rotatable. The vanes (27) of the pump are rotatably mounted on the shaft (11) so that they extend axially of the shaft and project radially through axially extending openings in the cylindrical wall of the rotor (7). The vanes (27) are thereby rotated on the shaft (11) when the rotor is driven, and the portions of the vanes projecting through the cylindrical wall of the rotor sweep a pump chamber (13) surrounding a portion of the rotor to convey fluid from an inlet to an outlet of the pump.

Abstract: A pump device connected to an AC generator for a car includes shoulder portions formed on both side surfaces of a plate or the side surface of an end frame and a housing, and chamfered portions or grooves formed in the end frame and the housing or the plate at positions corresponding to the shoulder portions. Packings are placed in spaces formed by the plate and the end frame and the housing.

Abstract: A hard vacuum pump of the type having a pump body (4) to which a multi-stage stator (3) and a multi-stage rotor (2) mounted on a shaft (1) are connected, said shaft (1) being driven by a motor and rotating in at least two ball bearings (5, 6) disposed in a sleeve (18) formed by an extension of said pump body (4), a dynamic molecular seal (7) being set on said shaft (1) at the body end of the sleeve (18), wherein the opposite end (11) of the sleeve (18) is closed, a nozzle (8) communicating with an outside source of gas being provided at said closed end (11), said pump body (4) also being connected to an exterior primary vacuum pump whereby said ball bearings (5, 6), and the rotor (9) of said motor are permanently swept by said gas entering via said nozzle and leaving via said dynamic seal, said gas flowing at a pressure intermediate between atmospheric pressure and the pump discharge pressure.The invention is used in microelectronics techniques.

Abstract: A positive displacement pump comprising two lobed impellors to contra-rotate within a casing which has two ports to act respectively as an inlet and an outlet, the casing having two impellor chambers, each chamber being peripherally defined by two arcs, at least one of the arcs of each chamber being centered at a point offset from the normal rotational axis of the associated impellor in a direction towards one port.

Abstract: A motor driven fuel pump adapted for use with a fuel injection system of an internal combustion engine has a pump housing and an impeller of regenerative pump type rotatably disposed in the housing and provided with circumferential rows of grooves formed in the opposite end faces of the impeller along the outer peripheral edges thereof. The housing is formed therein with suction and discharge ports and cooperates with the impeller to define a fuel pressurizing passage extending circumferentially of the impeller and surrounding the grooved outer peripheral section thereof. The fuel pressurizing passage is circumferentially interrupted by a partition wall disposed between the suction and discharge ports and extending radially inwardly into close contacting relationship to the outer peripheral section of the impeller to prevent flow of fuel from the discharge port toward the suction port.

Abstract: This windmill head comprises a stub tower having a rotatable platform carrying a wind driven fan which drives a transmission mechanism. The mechanism has two cranks and pitman arms at opposite sides driving two rocking beams carrying counterweights. One beam is coupled to a vertical pump rod by non-rigid members to reciprocate the pump rod. The counterweights assist the beams in pulling up the pump rod and pumped load. A tail assembly tracks the wind by rotating the platform so that the fan faces the wind. The fan furls out of the wind when wind speed is excessive. A power unit may drive the transmission mechanism when wind speed is too low and high to drive the fan. The platform is carried by bearings which prevent vertical movement of the platform and components on it while the pump rod is being pulled up and pushed down, and while the counterweights are raised and lowered. The power unit can generate electric power when the wind speed is high enough to drive the fan.

Abstract: A trochoid-type rotary piston gas expansion device including a stationary housing and endwalls defining an epitrochoidal cavity closing where the cavity is symmetrical about a first axis transverse to the end walls, a rotatable crank shaft extending through the cavity parallel to the first axis, and having an eccentric portion located on the shaft in the cavity, a rotary piston mounted on the eccentric portion of the shaft so that the axial centerline of the piston describes a circular path of selected diameter during rotation thereof where the rotary piston includes flank surfaces which intersect at apices to determine lines of sealing contact with the walls of the cavity.

Abstract: A multi-cylinder single-stage rotary rolling piston type gas compressor comprises four modular cylinder housings, partitions and end covers bolted together in end-to-end arrangement. Each cylinder housing includes an inner wall which defines a centrally located cylinder chamber and vane slot and an outer wall which defines a suction chamber, a discharge chamber and an oil chamber or reservoir surrounding the cylinder chamber. The four suction chambers are connected together end-to-end to a common gas inlet port. The four discharge chambers are connected together end-to-end to a common gas discharge port. The four oil chambers are connected together end-to-end. An internally lubricated rotor assembly extends axially through the four cylinder chambers and comprises a shaft rotatably supported on the end covers. The shaft has four eccentric crankarms on which four roller pistons are rotatably mounted, one for each cylinder chamber. The two central pistons are angularly displaced 180.degree.

Abstract: In a vane pump of the type comprising a rotor including radially slidable vanes, a cam ring accommodating the rotor, a front body and a rear body secured to both sides of the cam ring for defining pump chambers together with the cam ring, there is provided an intermediate body having an inner opening for accommodating the cam ring. The intermediate body is disposed between the front and rear bodies, and a portion of the inner opening is bulged outwardly to form a fluid passage for conveying operating fluid from the body to the rear.

Abstract: Oil feeding device for feeding lubricant oil to bearings journalling a crank shaft connected to an orbiting scroll member of scroll fluid apparatus including recessed oil flow passages formed on the outer peripheral surface of the crank shaft in positions corresponding to a first plain bearing journalling a crank portion of the crank shaft and second and third plain bearings for journalling a shaft portion of the crank shaft respectively. The oil flow passage for the third plain bearing offers a lower resistance to the flow of fluid than the oil flow passages for the first and second plain bearings, to thereby avoid wear and seizure of the bearings.

Abstract: A gerotor type star and ring gear machine in which control orifices in the star gear alternatively register with ports in the end wall. The star gear is formed from a series of plates and has two sets of control orifices formed therein with one set being diametrically opposed to the second set.

Abstract: A variable flow reversible vane pump having a rotor with slidable vanes, a shaft providing rotary power take off for the rotor and a cam ring wherein said rotor rotates with the vanes engaging the inside of the cam ring. A case encases the cam ring and a front bearing plate connects to the front of the case. A rotary valve surrounds the shaft and flushes against the cam ring and the rotor with slidable vanes and has a structure defining a plurality of directly opposed channeled arcuate grooves, at least one port in each of the opposed grooves, and a plurality of gear teeth along part of the periphery. A rear bearing plate encloses the other end of the cam ring and the rotor and has a structure with rear plate apertures in communication with one of the opposed arcuate grooves and the port therein of the rotary valve plate. A rotatable gear is lodged within a gear channel of the case and meshes with the gear teeth along the periphery of the rotary valve plate.

Abstract: A vibration free fluid compressor particularly adapted for Stirling cycle cryogenic refrigeration apparatus comprising a pair of identical opposing ferromagnetic pistons (10, 12) located in a housing (22) and between a gas spring including a sealed volume (52, 54, 60) of a working fluid such as gas under pressure. The gas compresses and expands in accordance with movement of the pistons (10, 12) to generate a compression wave which can be vented out to other apparatus, for example, a displacer unit in a Stirling cycle engine. The pistons (10, 12) are urged outwardly due to the pressure of the gas; however, a fixed electromagnetic coil assembly (56), located in the housing adjacent the pistons, is periodically energized to produce a magnetic field which interlinks the pistons (10, 12) in such a fashion that the pistons are mutually attracted to one another.

Abstract: In a reciprocating piston air compressor, air is induced via an intake valve in the compressor cylinder head and, in addition, air which has been pre-compressed on the rear side of the piston is forced into the cylinder space via slots in the cylinder wall controlled by the piston. The delivery and the efficiency of the air compressor are improved according to the invention by the provision that the pre-compression of the air occurs by means of a turbo-compressor and that during the return stroke of the piston, the cylinder space is connected with an additional clearance space via an opened control valve in the cylinder head, by means of which the hot compressed air which has not been expelled is replaced by cooler air.

Abstract: A compressor of the scroll type which includes a compression part and a motor to drive it, both received within a shell at upper and lower portions thereof, respectively, the compression part including a stationary and a movable scroll each having a convolute shape and associated with each other so as to form compression chambers therebetween, and disposed within the shell between the compression part and the motor is a frame that is formed therein with a hollow space in communication with a suction pipe which is arranged so as to pass through the shell, the hollow space being in communication through the air gap of the motor with a space formed within the shell below the motor, which is in turn in communication with the suction port of the compression part through the space formed between the motor and the shell and the passages formed in the frame.

Abstract: A motor-compressor unit comprising a shell, a compressor, and a motor. The compressor includes a yoke and a slide block to transmit motion from a compressor crankshaft to a plurality of compressor pistons. The yoke includes left and right longitudinally extending side wall portions, and upper and lower front and rear connecting portions secured to and transversely extending between the left and right side wall portions. The upper and lower front connecting portions define a front transverse opening, and the upper and lower rear connecting portions define a rear transverse opening. The slide block is supported by the yoke for longitudinal sliding movement through the front and rear transverse openings.

Abstract: The cylinder of a reciprocating compressor is provided with a flanged collar defining an annular recess adjacent the side walls of the cylinder bore disposed for entry of the piston skirt during the downstroke into the recess, compressing gas therein. Communication is provided between the recess and the space above the piston and cylinder head, increasing the initial pressure above the piston and causing greater pressure to be developed during the compression stroke. The result is an increase in the volumetric efficiency of the compressor.

Abstract: A centrifugal pump for circulating fluids at high pressure comprises an impeller having an axis of rotation, a casing defining a pumping chamber, a nonmagnetic canister sealed at one end and extending away from the pumping chamber surrounding an extension of the impeller axis, and an impeller shaft journaled in the nonmagnetic canister. The shaft has mounted thereto circumferentially magnetized rare earth cobalt magnets. A drive magnet assembly comprising a sleeve is journaled about the nonmagnetic canister with circumferentially magnetized rare earth cobalt magnets mounted therein. Rotation of the sleeve results in synchronous rotation of the impeller and impeller shaft.

Abstract: A rotor for a rotary engine of the kind comprising a rotor which rotates in a cavity to form working chambers within the cavity which vary in volume as the rotor rotates, the rotor comprising a body having, in a plane transverse to the axis of rotation of the rotor, an outer profile of generally equilateral triangular shape with outwardly curved sides and an inner profile providing part peripheral location formations in regions of the mid-points of the rotor sides in engagement with an insert, the insert providing a bearing part and an indexing gear of the rotor, the inner profile of the body adjacent each apex of the rotor being radially outwards of the inserts of the entire axial length of the rotor thereby providing a gap between the location portions so that axial cooling passages are formed bounded by the rotor body and the insert.