Abstract: Provided is a rotary compressor excellent in energy saving performance and reliability by improving sliding performance of a sliding portion and ensuring sealability in a working chamber. An oil groove is formed at a position facing a vane end face on an end plate. The oil groove communicates with an inside of a sealed container, and is exposed in a gap between a leading end surface of a vane and an outer peripheral surface of an annular piston formed when the leading end surface of the vane is in abutment on the outer peripheral surface of the annular piston.

Abstract: Provided is a rotary compressor excellent in energy saving performance and reliability by improving sliding performance of a sliding portion and ensuring sealability in a working chamber. An oil groove is formed at a position facing a vane end face on an end plate. The oil groove communicates with an inside of a sealed container, and is exposed in a gap between a leading end surface of a vane and an outer peripheral surface of an annular piston formed when the leading end surface of the vane is in abutment on the outer peripheral surface of the annular piston.

Abstract: A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Abstract: A dry pump includes: a plurality of cylinders; a pump chamber formed in each of the cylinders; a division wall separating pump chambers adjacent to each other; a plurality of rotors contained inside pump chambers; a rotating shaft that serves as an axis of rotation of the rotor; and a cooling medium path which is formed inside the division wall and through which a cooling medium passes.

Abstract: The rotating shaft is connected to the generator; the high-pressure steam s is introduced to the expansion chamber b through the guide passage; when the energy of the high-pressure steam s during expansion process revolves the revolving scroll, the generator regenerates electric power. The connecting housing is provided with the inlet opening and the outlet opening; the ventilation blades are fitted to the rotating shaft. When the ventilation blades rotate, the outside air is introduced (inside of the housing) from and through the inlet opening; the air passes by the air opening and the backside of the revolving scroll, and is discharged through the outlet opening. Thus, by the approach that the air passage is formed inside of the connecting housing and the scroll housing, the high-pressure steam s is prevented from being directed toward the backside of the revolving scroll.

Abstract: An axial air cooling system for scroll-type positive fluid displacement apparatus provides needed cooling. The system includes an axial fan and centrifugal pump and internal cooling air channels inside parts integrating main housing, base housing and motor housing with their corresponding shell parts by cooling fins. The cooling air channel also includes passages inside the orbiting scroll, shaft central hole and gaps inside stator slots and winding. Heat pipes are installed inside the fixed and orbiting scrolls to conduct heat from inside of the apparatus to the peripheral condenser portion of the heat pipes to be cooled by the cooling air.

Abstract: A rotor for a screw vacuum pump has a threaded body in which a central cavity is formed. A coolant is supplied to the cavity from a supply line provided in a shaft attached to the body. A coolant flow guide, which may be either separate from or at least partially integral with the shaft, is located within the cavity. The flow guide has an outer surface adjacent, preferably in contact with, the body to enable heat to the transferred from the rotor to the guide. The guide also has an inner surface defining a bore, and defines at least in part a plurality of axially extending slots radially spaced from and in fluid communication with the bore. In use, coolant flows into the cavity through the bore of the guide, and out from the cavity through the axially extending slots, extracting heat from the guide as it flows both into and out form the cavity. The discharged coolant is conveyed form the slots into a discharge line located within the shaft.

Abstract: A screw compressor rotor housing is surrounded by a cooling housing that forms an annular cooling chamber. The cooling chamber is interrupted at one point by a separating wall that connects the rotor housing to the cooling housing. Coolant is fed at an inlet opening and is directed at the bottom side of the separating wall by an entrance channel, is redirected, and flows around the rotor housing until it reaches the top side of the separating wall. The coolant is redirected and is withdrawn through an exit channel that runs upward to the outlet opening. A bleed opening in the wall of the entrance channel and a vent opening in the wall of the exit channel allow for a residual amount of air to remain in the cooling chamber when it is filled with coolant, and for a residual fluid to remain when it is emptied.

Abstract: A compressor having a compression member whose upper surface crosses an axial direction of a rotary shaft and is inclined continuously between a top dead center and a bottom dead center and which is disposed in a cylinder to be rotated by a rotary shaft and which compresses a fluid sucked from a suction port to discharge the fluid via a discharge port; a vane disposed between the suction port and the discharge port abuts on the upper surface of the compression member and partitions a compression space in the cylinder into a low pressure chamber and a high pressure chamber; the upper surface of the compression member has a flat surface centering on an intermediate point between the top dead center and the bottom dead center and curved surfaces gradually approaching the top dead center and the bottom dead center continuously from the flat surface.

Abstract: A hermetic rotary compressor operates two cylinders simultaneously in the regular operation; however it halts operating one of the cylinders when it selects an operation with a half capacity. A vane room of the halted cylinder is air-tightly sealed with respect to lubricant atmosphere in a hermetic case. An oil-supplying groove is provided to a vane groove of the halted cylinder, and lubricant is supplied to the oil-supplying groove in order to lubricate the vane.

Abstract: A hermetic compressor uses an oil pump that includes a trochoid gear. Therefore, regardless of the rotation speed of a driving motor of the compressor, a sufficient amount of oil can always be pumped. The oil pump unit may include a plurality of suction holes with openings at different heights. If the refrigerant and oil separate, at least one of the openings will admit oil into the oil pump unit, to ensure lubricating oil is supplied to the moving parts of the compressor.

Abstract: A scroll fluid machine comprises a housing having a fixed scroll and an orbiting scroll revolved by a driving shaft which is driven by a motor behind the housing. A blowing fan is provided between the orbiting scroll and the motor. Rotation of the fan causes decompression in the housing to allow primary external air to be sucked from the outside into the housing through a primary sucking hole. Secondary external air is introduced from a secondary sucking hole and mixed with the primary external air of the scroll fluid machine to cool the parts of the scroll fluid machine in the housing and/or the motor.

Abstract: An object is to execute sure oil supplying to a second rotary compression element in a horizontal type compressor equipped with the second rotary compression element in which pressure becomes higher than that in an airtight container. A horizontal type rotary compressor of a multistage compression system comprises a driving element and a compression mechanism section driven by the driving element in a horizontal type airtight container. The compression mechanism section is constituted of first and second rotary compression elements. A refrigerant compressed by the first rotary compression element is discharged into the airtight container, and the discharged refrigerant of intermediate pressure is further compressed by the second rotary compression element to be discharged. A gist is that an oil supply passage is formed in a cylinder of the second rotary compression element 34 to communicate a low-pressure chamber of the cylinder with a bottom part in the airtight container.

Abstract: A scroll fluid machine comprises a stationary scroll and an orbiting scroll between which a sealed space is formed. The orbiting scroll is eccentrically revolved with respect to the stationary scroll around a drive shaft via a bearing. An oil-supply hole is formed at the orbiting scroll so that grease may be supplied into the bearing for lubrication; There is a self rotation preventing device for the orbiting scroll and another oil supply hole to that device.

Abstract: A scroll-type compressor is provided in an inclined or inverted position with an oil sump disposed adjacent to a gas inlet of the scroll wraps to allow droplets of oil to be entrained in the gas being compressed so that the oil droplets in the gas can cool the scroll wraps. An oil injection fitting also extends through the compressor shell and communicates lubricating oil to a lubrication passage in the crankshaft for providing lubricant to the bearings of the crankshaft of the compressor and other components. The oil injection fitting is supplied with lubricant from an externally disposed source.

Abstract: An elliptical potary engine having a cylindrical rotor that rotates within a cyclindrical housing having cycling chambers defined between a plurality of radially extending piston vanes disposed within vane channels within the rotor. During the rotation of the rotor, the piston vanes are urged radially outward by cam-like elliptical piston vane guides associated with the head and the base of the housing and are returned therein by the elliptical interior wall as the diameter thereof decreases.

Abstract: A compressor includes a Z-plate which sections an inner space of a cylinder into a plurality of compression spaces to suck, compress and discharge a fluid and vanes being in contact with both sides of the Z-plate to be moved reciprocally to section each compression space into a suction area and a compression area. The Z-plate includes a curved portion formed with a particular function for the both sides being in contact with the vane, a plane portion formed around an inflection point of the curved portion including the inflection point, and a gentle portion formed round between the curved portion and the plane portion. The vanes are maintained in a state of constantly contacting the cam surface of the Z-plate, so that an impact noise caused between the vane and the Z-plate can be prevented.

Abstract: A compressor, capable of reducing friction among a vane and parts which perform relative motion with the vane in driving the compressor by using materials having thermal expansion coefficient of the vane as same as or higher than 2.5×10−5/° C., reducing consumption of activation energy and friction loss by gaining lower friction coefficient and higher abrasion resistance, reducing abrasion of the parts, controlling heat transfer, and increasing suction amount of refrigerant gas, can improve compression performance.

Abstract: In a compressor including a sealed casing respectively communicating with a suction pipe and a discharge pipe; a cylinder assembly disposed in the sealed casing and having a suction path and a discharge path; a Z-plate partitioning the internal space of the cylinder assembly into plural compression spaces and sucking, compressing and discharging gas while being rotated by a motor part; a vane contacted to the both surfaces of the Z-plate and partitioning each compression space into a suction region and a compression region while performing a reciprocating motion; and a discharge muffler covered the both sides of the cylinder assembly and lowering noise of discharged gas, a compressor comprises at least one oil returning member installed on a discharge route between the discharge path of the cylinder assembly and the discharge pipe of the sealed casing in order to filter oil flowing with gas.

Abstract: An oil storage area (45a) is defined on the bottom of a motor chamber (45) of a scroll compressor (1). An oil transfer route (4a) is defined in the portion of a center housing (4) that corresponds to the storage area (45a). Lubricating oil L is separated from the discharged, compressed refrigerant by an oil separator (80) and the lubricating oil L is supplied to the backside of a movable scroll (20) due to a pressure differential within the compress (1). After lubricating a bearing (10), the lubricating oil L is temporarily stored in the storage area (45a) and then is transferred due to a pressure differential to the suction-side of a compression mechanism (21) via the oil transfer route (4a). The lubricating oil L is then transferred to the oil separator (80) together with the compressed refrigerant that is discharged from a compression chamber (32) of the compression mechanism (21).

Abstract: A rotary pump including: a casing having a circular inner circumferential surface, a rotor rotating about a center of the inner circumferential surface of the casing, a partition plate installed so as to be movable in and out of the casing so that a tip end of the partition plate comes into contact with an outer circumferential surface of the rotor, a spring which drives the partition plate so that the partition plate is in constant contact with the rotor, and an intake port and a discharge port formed in the casing so as to be positioned after and before the partition plate with respect to the direction of rotation of the rotor; and the partition plate is formed with a communicating portion that communicates between the intake port side and the discharge port side.

Abstract: A compressor includes a cylinder assembly which is positioned inside a hermetic vessel having a suction flow path and discharging flow path, a Z-plate for dividing an inner space into a plurality of compression spaces in the cylinder assembly, rotating by a motor part so that gas is sucked, compressed and discharged, and a vane for dividing the respective compression spaces into a suction region and compression region, performing a reciprocating movement being contacted on both surfaces of the Z-plate. In addition, an oil slot for inflowing oil into the cylinder assembly is formed on a side surface of the vane. Therefore, friction generated at a sliding portion inside of the cylinder assembly can be reduced and performance deterioration of the compressor caused by operation noise and friction resistance of the compressor can be prevented.

Abstract: A rotary pump including: a casing having a circular inner circumferential surface, a rotor rotating about a center of the inner circumferential surface of the casing, a partition plate installed so as to be movable in and out of the casing so that a tip end of the partition plate comes into contact with an outer circumferential surface of the rotor, a spring which drives the partition plate so that the partition plate is in constant contact with the rotor, and an intake port and a discharge port formed in the casing so as to be positioned after and before the partition plate with respect to the direction of rotation of the rotor; and the partition plate is formed with a communicating portion that communicates between the intake port side and the discharge port side.

Abstract: An orbiting blade rotary machine, especially for use in compressor and expansion motor units, includes a stator housing bounding an internal space that includes a substantially cylindrical internal chamber centered on a central axis. A power shaft extends in a centered relationship along the central axis through the internal space, being mounted on the stator housing for rotation about the central axis. Each of a plurality of orbiting blades extends substantially radially outwardly from the power shaft in the internal chamber toward the stator housing in its neutral position, being supported on the power shaft for pivoting within a limited angular range around the neutral position. An eccentric rotor is mounted in the stator housing for rotation about an eccentric axis parallel to and transversely offset from the central axis, being accommodated in the internal chamber to delimit a working space that the orbiting blades subdivide into individual compartments.

Abstract: A rotary compressor includes a cylinder having a slot, an eccentric shaft disposed in the cylinder, a roller formed around the shaft, a vane inserted into the slot and having grooves on its surface, and a sealing material inserted into the grooves. The sealing material prevents leakage and influx of gas through a gap between the cylinder and the vane, improving the efficiency of a rotary compressor.

Abstract: A rotary motor using pistons for providing a scalable and more efficient, higher speed engine with improved compression. The rotary motor using pistons includes a main housing having and interior, an inlet port in environmental communication with the interior of the housing, an outlet port in environmental communication with the interior of the housing, a spark plug port for receiving a spark plug also in environmental communication with the interior of the housing, a first plate coupled within the housing and rotatable within the interior of the housing, a second plate member coupled within the housing and rotatable within the interior of the housing, a plurality of pistons coupled to an associated one of the first or second plate members, a drive shaft coupled to one of the first or second plate members and extending out of the housing, and an anti-reverse clutch operationally coupled to the drive shaft.

Abstract: The invention pertains to a rotary piston machine in which a rotor rotates in an enclosure and radially movable slides in the rotor form chambers of varying volume between the enclosure and the rotor, wherein an even number of slides is provided and mutually opposing slides are joined together into a rigid unit.

Abstract: A rotary machine vane includes a body and an articulated tip pivotally joined thereto. The body is complementary with a slot of a rotor in which it is mountable for radial reciprocation therein. The body includes an arcuate cradle extending axially along a radially outer end thereof. The vane tip includes a pin and an integral plate extending along the pin for facing a casing surrounding the rotor to form a seal therewith. The pin is complementary to the cradle for defining a radial gap therebetween, and is radially outwardly retained by the cradle for rocking movement therein for self-alignment with the casing.

Abstract: A guided-vane type rotary apparatus including a housing, a rotor rotatably mounted within the housing for rotation about an axis, and vanes associated with the rotor for movement radially with respect thereto between alternative radial positions utilizes an endless groove defined in the housing and cam follower elements which are joined to the vanes and captured between the walls of the groove. As the rotor is rotated about its axis and the vanes are forced to rotate within the housing in conjunction with the rotor, the cam follower elements are guided along the groove and force the vanes to move radially of the rotor between alternative radial positions. Thus, the walls of the groove and each mechanism joined to a vane cooperate as cam and cam follower, respectively, to move the corresponding vane between alternative radial positions as the rotor is rotated within the housing.

Abstract: A rotary engine includes a cylindrical rotor having four spaced apart vanes therein mounted in a stator housing having an oblong perimeter casing which defines generally crescent shaped, diametrically opposite first and second working chambers in which the rotor vanes travel. Inlet and outlet ports are disposed at respective ends of the working chambers, and a flow chamber is joined to the casing between the working chambers. The vanes have tip apertures supplied with pressurized fluid to provide bearings with the casing.

Abstract: A rotary engine includes a cylindrical rotor having four spaced apart vanes therein mounted in a stator housing having an oblong perimeter casing which defines generally crescent shaped, diametrically opposite first and second working chambers in which the rotor vanes travel. Inlet and outlet ports are disposed at respective ends of the working chambers, and a flow chamber is joined to the casing between the working chambers. The flow chamber temporarily stores compressed fluid from the first working chamber and discharges it into the second working chamber wherein combustion takes place for rotating the rotor.

Abstract: A rotary internal combustion engine including a housing dividing a substantially circular rotor chamber and a drive shaft extending through this chamber. A circular rotor is mounted in the chamber on the drive shaft and has a diameter less than the diameter of the chamber. The rotor and drive shaft are offset from the center axis of the chamber. Two pairs of vanes are slidingly mounted in the rotor with one vane of each pair being located diametrically opposite to the other vane of the pair. Rods fixedly connect the vanes of each pair together so that the predetermined distance between outer ends of the vanes of each pair remains constant and is the same for each pair. This predetermined distance is substantially equal to the distance from a point on the circumferential wall of the chamber which is closest to the circumference of the rotor and a second point on the wall diametrically opposite the first point.

Abstract: An internal combustion engine of the rotary type has a pair of connected pistons and provides increased power and fuel economy. The fuel combustion chamber includes a single-acting air inlet valve and a double-acting outlet valve. The oil cooling system delivers air through each of the pistons whereby the oil is recirculated after cooling.

Abstract: An arrangement reduces friction between the sliding vane and rolling piston of a rotary compressor. In particular, a roller is built into a cavity at the tip of the vane. The roller provides rolling contact with the rolling piston so as to minimize friction between the vane tip and the rolling piston. An oil feed hole is provided in the cavity so as to feed oil onto the roller and, by way of the roller, to the external surface of the rolling piston. The reduction in friction reduces heat and, thereby reduces oil degradation. The result is less noise and less likelihood of mechanical breakdown.

Abstract: A multiple or compound work cycle, eccentric rotor, fluid power translation device, featuring adjustable and reversible work output capability, essentially comprising: A symmetric rotor having a plurality of fixed radially extended vanes rotating closely between opposing co-axially adjustable confinement plates. An internal, eccentrically disposed annulus comprised of segmented concentric rings having co-axially protruding edges; said edges engaging circular, matching bearing grooves provided by said opposed confinement plates. The segments comprising each segmented ring being each penetrated by a rotor vane; two or more segments per vane thereby compelling co-rotation of said segments and locating said segments relative segments penetrated by adjacent rotor vanes.

Abstract: A slidable vane motor is used in conjunction with an externally located combustion member in which fuel is burned and compresses air for delivery to the combustion member and expands the combusted gas resulting from the fuel combustion in the compressed air. The vane motor and combustion member thus cooperate to form an external combustion engine. The energy extracted from the expansion of the gas is greater than the energy required to compress the air. The energy difference is delivered by a drive shaft external to the engine. The motor vanes slide quasi radially in guiding slots as the motor rotates to cause volumes of air trapped between contiguous vanes to decrease and trapped volumes of gas to increase concurrently. The vanes are thus subjected to pressure differentials which are applied quasi normally onto the vane sliding surfaces. The resulting torque is reacted by the action of high pressure air cushions located between the cooperating surfaces of the vanes and their slots.

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: A compressor-expander having a vaned rotor in which the vanes rotate about an axis which is canted with respect to the rotor axis. The housing of the device has a disc-shaped main cavity having adjacent hub recesses which are concentrically spherical. The cavity is in the form of a doubly truncated sphere canted with respect to the shaft axis. The rotor has a central spherical portion for mating with the recesses and includes an integral Saturn-like ring extending to the outer wall of the cavity to divide the cavity into first and second complementary sides of annular wedge shape. The vanes occupy radially extending slots in the rotor and serve to separate each side into successive chambers which vary cyclically in volume as the shaft rotates without requiring the vanes to bodily reciprocate either radially or axially. Each side is provided with inlet and outlet ports.

Abstract: A rotary compressor, more particularly, a positive cam type compressor wherein a movable isolator plate is driven by a positive cam. The positive cam has a helically twisted disk portion, and is fitted in a cylinder slidably. The cylinder cavity is divided into operating compartments in which suction and compression processes are performed alternately, when the positive cam is rotated by a driver shaft. The positive cam and the isolator plate form a sliding pair, so that the plate can be reciprocatively moved when the cam rotates. The circulation of lubricating oil is positively effected by the reciprocating motion of the isolator plate.Thus, there can be provided a considerably small and light compressor that is constructed with relatively smaller number of parts. Furthermore, the compressor of the present invention may have good characteristics of vibration and noise. The above compressor is suitable to an air conditioner for vehicle.

Abstract: An improved apex seal for a rotary engine of the type having a housing with an interior wall and a rotor having plural apices within the housing. A plurality of apex seals are provided, one at each of the apices on the rotor, for establishing a seal between the rotor and the interior wall of the housing. Each of the seals is thin walled and hollow and further includes a fluid inlet and a fluid outlet. Conduits are provided in the rotor for directing a coolant through each of the seals via the inlets and the outlets so as to control seal temperature and thereby minimize seal wear.