Abstract: A screw compressor comprises a pair of screw rotors provided in a casing, a cylinder fixed to the casing and having a first chamber and a second chamber, a first piston fitted in the first chamber, a second piston fitted in the second chamber, a built-in volume ratio adjusting valve operated by the first piston, a volume control slide valve operated by the second piston, a stopper fixed to the casing to limit the backward movement of the built-in volume ratio adjusting valve, and a volume control slide valve. When built-in volume ratio adjustment is unnecessary, the built-in volume ratio adjusting valve is held immovable between the stopper and a spacer fixed to the built-in volume ratio adjusting valve and resting on a fixed surface of the casing. All the forces acting on the immovable built-in volume ratio adjusting valve are sustained by the casing, so that the rest of the components of the screw compressor are not exposed to excessive forces.

Abstract: The invention relates to a rotary screw compressor with liquid-injection means. The axes of the rotors (18, 20) are in a horizontal plane and the inlet channel (26) reaches the compressor from below. According to the invention there are provided means for preventing that liquid leaking out from the working space of the compressor through the inlet port (46) reaches the inlet channel (26). These means include partition walls (34, 36) mounted in an inlet chamber (28) connecting the inlet channel (26) to the inlet port (46).

Abstract: A molecular drag pump for delivering a gas under molecular flow conditions comprises a pair of parallel, helically threaded rotors rotatably mounted in a stationary housing. The rotors have respective helical threads and respective helical grooves, and are held in close mesh with each other. The helical threads are helically inclined in one direction to the axes of the rotors, and have a flank angle such that the helical threads are closely received in the respective helical grooves while keeping the threads out of contact with each other. The rotors are rotated in one direction about their respective axes to move a gas introduced through an inlet port toward an exhaust port axially along the rotors.

Abstract: A spinning pump (1) connected to a spinning pump block (2) by means of fastening screws (3) comprises a base plate (4) in contact with the connection face (11) of the spinning pump block (2), one or more gear plate (5), a cover plate (6), a drive shaft (7), an inlet channel (8) as well as outlet channels (9) for the spinning fluid, the channels (8, 9) are aligned with corresponding channels of the spinning pump block (2). The fastening screws (3) traverse through passage bores (12) an adapter part (15) connected with the cover plate (6) as well as plates (6,5,4) and are screwed into threaded bores (13) in the spinning pump block (2).

Abstract: A rotary positive displacement blower (10) of the Roots-type having inlet and outlet vents recess (60,62) for reducing fluid pressure build up in spaces between meshing, helical lobes (34a, 36a) on rotating rotors of the blower.

Abstract: A mixer arrangement for a bypass type gas turbine engine is disclosed. The mixer is convoluted and generally annular and defines radially and axially extending first and second chutes adapted to receive, respectively, a hot gas stream from the engine core and a cooler gas stream from the fan duct. A pre-mixer is disposed upstream of the mixer and is also convoluted and is aligned in flow communication with the second chutes of the mixer such that the hot gas stream received by the pre-mixer is mixed with the cooler fan air stream received by the second chutes to raise the temperature of the fan air entering an afterburner section of the engine.

Abstract: A rotary hydraulic motor which comprises a brake which is adapted to be applied under the pressure of springs and to restrain the output shaft of the hydromotor when the hydromotor is not pressurized and which is arranged to a supply of hydraulic liquid under pressure to the hydraulic motor. In order to ensure that the hydraulic liquid can be withdrawn from the hydraulic cylinder in a simple manner when the motor has stopped so that the brake can subsequently be applied, the piston of the hydraulic cylinder is provided with an orifice plate or a throttle bore through which the hydraulic liquid can enter a chamber of the hydraulic motor.

Abstract: An oscillatory rotating engine has a pair of rotors each defining a pair of diametrically opposed radially extending lobes, the rotors are mounted for rotation within a cylindrical housing and sealingly engage the walls of the cylindrical housing to define four working chambers. Each rotor is drivingly connected to an output shaft by means of an internal/external gear train, the external gear being mounted for rotation with the rotor and the internal gear being mounted rotatably with respect to the output shaft for orbital motion in mesh with the external gear. Each internal gear has an arm with a longitudinal slot which is engaged by a pivotal block which will act to rotationally restrain the internal gear and impose a periodic variation in velocity on the gear train, this periodic variation in velocity for the two rotors being out of phase so that the working chambers are alternately expanded and reduced in volume.

Abstract: Lift valves are used for controlling the capacity of a rotary compressor and to vary the built-in volume in the rotary compressor. When controlling the capacity of the rotary compressor, the built-in volume is adjusted by controlling the opening and closing of the lift valves in relation to one another.

Abstract: A rotary pump comprises a housing and at least a pair of rotatable, meshing gears positioned within the housing. The meshing gears define teeth which extend helically in the general direction of the axis of each gear rotation. A flow inlet and a flow outlet are positioned in the housing to permit fluid to flow longitudinally along the gears generally in the direction of said axis as the gears rotate relative to each other. By this invention, the helically extending teeth define on at least one of the gears a total angle of wrap from end-to-end of the gear upon which they are carried of essentially 360 divided by twice the number of teeth on the gear, in degrees, multiplied by a number N of 1/2 to 3. This relatively low total angle of wrap provides significant improvements in gear pumps.

Abstract: A rotary compressor has an electric motor and a compression mechanism drivingly connected thereto by a crank shaft including an eccentric portion having flangelike thrust bearing sections and an eccentric pin section on which a rolling piston is mounted for eccentric rotation in a cylinder bore. The eccentric pin section has formed therein at least one axial through-hole for reducing the mass unbalance of the pin section. The crank shaft has formed thereon coaxial sections each concentric to the axis of rotation of the crank shaft and disposed between the eccentric pin section and one of the thrust bearing sections to decrease the axial dimensions thereof and of the eccentric pin section for thereby decreasing the total mass unbalance of the eccentric portion of the crank shaft whereby crank shaft deflection due to mass unbalance is remarkably reduced particularly at a high speed operation.

Abstract: A motor-operated pump includes an electrical filter that includes an inductance and a capacitance mounted within the pump housing. The filter components are thereby shielded against possible damage during initial installation, or during shipment, or during maintenance operations. Electrically, the filter components are in direct connection with the motor terminals, so as to have maximum electrical effectiveness for suppression of radio frequency emissions that might otherwise be communicated to other on-board electrical components.

Abstract: A sealed case has first and second housing portions. A motor section is arranged in the first housing portion of the sealed case and has a rotating shaft extending in the second housing portion. A compression mechanism section is arranged in the second housing portion of the sealed case and has first and second cylinders stacked on each other and first and second crank portions which are formed on the rotating shaft in the first and second cylinders, respectively. An accumulator is arranged outside the sealed case so as to substantially oppose an arrangement position of the motor section. A first suction pipe connects the accumulator to the first cylinder of the compression mechanism section. A second suction pipe is arranged outwardly from the first suction pipe so as to connect the accumulator to the second cylinder of the compression mechanism section.

Abstract: The eccentric wheel, which is driven to rotate in the housing of a compressor, having two eccentric axles longitudinally aligned at two opposite ends for mounting a pair of links to hold a blocking plate. The blocking plate is carried by the links to displace when it is constantly disposed in contact with the eccentric wheel, and therefore, friction between the blocking plate and the eccentric wheel is greatly improved.

Abstract: A rotary piston engine comprising two segregated body chambers of compression and expansion, and one separable combustion chamber, carrying out air suction and compression, combustion resultant expansion and exhaust, and fuel injection and constant-volume combustion process without any valve respectively: the compression and the expansion chamber both are arranged parallel adjacent to each other, both are formed by two partially overlapped body-bores provided respectively with cylindrical hubs at respective centers thereof, both have a pair of screwed rotors rotatably mounted on said respective hubs, and both communicate to each other by the combustion chamber and gas passageway means; it is characteristic in configuration that the closed space made by rotor projecting portions are progressively changed in geometry as rotors rotate, and that exhaust gases make no explosion noises.

Abstract: A vacuum vane pump wherein one or more stages are installed in an annular extension of the casing for the pump motor. Each stage has a rotor which is driven by the motor shaft by way of an elastic key, and an annular housing which surrounds and is eccentric relative to the rotor. The housing is pivotable about a pintle which is installed in the end walls of the casing and is parallel to the motor shaft. The width of an annular clearance between the external surface of the housing and the internal surface of the extension can be varied by a radially disposed screw which is mounted in the extension diametrically opposite a spring-loaded abutment for the housing. The components of each stage are biased to predetermined axial positions by springs which react against the extension and bias one end wall of the casing against the adjacent housing and rotor, either directly or by way of a partition.

Abstract: An arrangement of a cooling medium pump of a rotary piston internal combustion engine of trochoidal-type of construction with a fluid or liquid cooled housing, with which the cooling medium is conveyed first in common and parallel through cooling hollow chambers of the casing mantle part and of a side part in a common hollow chamber and from there is conveyed by way of a cooling medium pump into another side part and from there via a thermostat into a cooler arranged on the other side part and from there it is returned into the cooling medium circulation in the housing. The cooling medium pump is arranged in the casing mantle part and a propeller or impeller thereof is arranged in a cooling hollow chamber of the other side part. A speed of rotation control regulator is arranged on a shaft of the cooling medium pump for fresh air supply and a lubricating oil pump also can be arranged on a butt end of this shaft.

Abstract: A horizontal rotary compressor comprises a sealed shell having a lubricating oil accumulated at a lower part therein; a drive unit included in the sealed shell; a compression unit included in the sealed shell and driven by the drive unit through a crankshaft; the crankshaft having a lubricating oil feeding hole formed therein; a lubricating oil pump for supplying the lubricating oil to the crankshaft to lubricate the compression unit; a discharge muffler which is arranged at the end of the compression unit remote from the drive unit, and which is provided with a lubricating oil passage; the lubricating oil passage having one end opened in the lubricating oil and the other end opened at the lubricating oil feeding hole; and a discharge refrigerant gas passage which is formed to be upwardly inclined in the discharge muffler so as to communicate from the space in the discharge muffler to the lubricating oil feeding passage.

Abstract: An apparatus harnessing energy belonging to fluid stream comprises a plurality of elongated fluid dynamic force receiving members with cambered cross sections disposed parallel to and about a shaft and supported by at least one hub member affixed to the shaft wherein the individual fluid dynamic force receiving member is secured to the hub member in a pivotable arrangement about a pivot axis disposed near one extremity thereof in a parallel relationship to the shaft, and at least one circular cam guide disposed on a plane perpendicular to the shaft that is engaged by a plurality of cam followers respectively secured to the plurality of elongated fluid dynamic force receiving members.

Abstract: A hermetic reciprocating piston refrigeration compressor utilizes separate cylinder head members for the discharge and suction plenum chambers adjacent the discharge and suction valves. The two cylinders heads extend over substantially the entire area of the valve plate at the end of the cylinder carrying the valves. A discharge cylinder head is formed of metal while the suction cylinder head is formed of a plastic material of low thermal conductivity to minimize heat transfer between the discharge and suction plenums. The suction cylinder head is formed as a unitary member to include also passages and a portion of the suction muffler and is secured in place by a single fastening member.