Abstract: Scroll compressors may include a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft, a bearing member coupled to the crank shaft and a movable scroll coupled to the crank shaft. The movable scroll is typically disposed adjacent to the stationary scroll. Further, the movable scroll preferably includes a boss that extends in the axial direction of the crank shaft. A spacer may be disposed between the boss and the bearing member and the spacer preferably transmits orbital movement of the crank shaft to the movable scroll. A compression chamber is defined by a space between the stationary scroll and the movable scroll. Fluid (e.g. a refrigerant gas) is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. A discharge port may be defined within the movable scroll and may be adapted to discharge the compressed fluid to a side that is opposite of the stationary scroll.

Abstract: Scroll compressor may include, for example, a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft, a bush coupled to the outer surface of the crank shaft and a movable scroll coupled to the crank shaft. The movable scroll is preferably disposed adjacent to the stationary scroll. A boss may be coupled to the movable scroll and the boss preferably protrudes from the movable scroll at the opposite side of the stationary scroll. A seal is preferably disposed in a clearance defined between the bush and the boss. A compression chamber is defined by a space between the stationary scroll and the movable scroll. Fluid is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. A discharge port is preferably defined within the movable scroll and is adapted to discharge compressed fluid to a side that is opposite of the stationary scroll.

Abstract: A scroll type compressor includes a fixed scroll member, a movable scroll member, an inlet, a discharge port, a discharge valve, a first pressure region and a second pressure region. The inlet is formed through the fixed scroll base plate. The discharge port is formed through the movable scroll member. The discharge valve opens and closes the discharge port. The first pressure region and the second pressure region defined at opposite sides of the movable scroll member apply pressure to the movable scroll member. Gas introduced through the inlet is compressed and highly pressurized in accordance with the movable scroll member orbiting with respect to the fixed scroll member. The highly pressurized gas is discharged from a compression region via the discharge port and the discharge valve. The compressor is provided with a communication passage so as to intercommunicate the first pressure region and the second pressure region during a predetermined period of a compression cycle established by the gas.

Abstract: A roller vane motor for downhole drilling comprises a housing (1) and a rotor (2). The housing contains wing deflector cams (5) that divide the space between housing and rotor into chambers (8a, b). The rotor is equipped with cylindrical rollers (7) in recesses (6), which rollers can move between an extended and a retracted position. Drilling fluid enters the chamber parts (8a) through inlet ports (10) in the upper bearing part of the housing (1) and pushes rollers (71) into their extended position and in a clockwise direction, making the rotor turn, whilst drilling fluid of lower pressure is pushed from the corresponding chamber parts (8b) through outlet ports (9) in the lower bearing part of the housing (1) and further to the drill bit below. When the rollers (71) reach the wing deflector cams (5) they are forced into the retracted position, their task being taken over by rollers (72).

Abstract: The oil passage for lubricating a seal means, which separates a high discharge pressure area inside a compressor and a low pressure area inside the compressor with a surface of a rotating member, can be eliminated. A lip seal 37, which is interposed between a center housing 12 and a circumferential surface of a rotating shaft 14, is prevented from being withdrawn from an insertion hole 121 by a circlip 38. A support portion 122, which forms a part of the insertion hole 121 and supports the lip seal 37, extends out into a motor housing 13. An outlet port 324 of a discharge passage 32 is directed to the top portion of the support portion 122 and the circlip 38.

Abstract: A roller vane motor for downhole drilling comprises a housing (1) and a rotor (2). The housing contains wing deflector cams (5) that divide the space between housing and rotor into chambers (8a, b). The rotor is equipped with cylindrical rollers (7) in recesses (6), which rollers can move between an extended and a retracted position. Drilling fluid enters the chamber parts (8a) through inlet ports (10) in the upper bearing part of the housing (1) and pushes rollers (71) into their extended position and in a clockwise direction, making the rotor turn, whilst drilling fluid of lower pressure is pushed from the corresponding chamber parts (8b) through outlet ports (9) in the lower bearing part of the housing (1) and further to the drill bit below. When the rollers (71) reach the wing deflector cams (5) they are forced into the retracted position, their task being taken over by rollers (72).

Abstract: In a compressor with a scroll compression mechanism having a stationary scroll and a movable scroll, a bearing through which the movable scroll is rotatably connected to a crank portion is disposed in a bearing box. The bearing box is provided for defining a back side room into which high-pressure refrigerant discharged from a discharge hole of an end plate of the movable scroll is introduced. The back side room is partitioned from the compression room by the end plate of the movable scroll to be opposite to the compression room, and a seal member which is disposed to air-tightly partition the back side room and a suction room of the compressor. Thus, a discharge pressure of refrigerant is applied from a back side of the movable scroll only at a position corresponding to the back side room. Accordingly, it is possible to reduce a compression thrust force without using a pressure adjustment valve.

Abstract: A refrigerant passage within a main shaft includes an axial refrigerant passage extending in parallel with the main shaft from the end surface thereof, and a radial refrigerant passage communicating with the axial refrigerant passage and extending radially outwardly. The radial refrigerant passage is located between the end surface of the main shaft and a motor rotor. Thus, when the main shaft rotates, suctioned refrigerant is uniformly sprayed toward an entire coil. Further, the refrigerant flows toward a compression mechanism through the electric motor, thereby cooling the electric motor effectively.

Abstract: A scroll fluid machine requiring no crank shaft to orbitably support an orbiting scroll member and capable of being reduced in overall size in the axial direction. In a casing, two fixed scroll members are provided on the axis of the casing, and an electric motor is provided between the fixed scroll members. Eccentric bearings each having an outer ring, an intermediate ring and an inner ring are provided between the electric motor and the fixed scroll members. The inner periphery of each intermediate ring is formed with an axis eccentric with respect to the axis of the casing. Orbiting scroll members are integrated with the inner rings through an orbiting shaft. The orbiting shaft is caused to orbit by rotating a rotating shaft with the electric motor, thereby causing the orbiting scroll members to orbit relative to the fixed scroll members.

Abstract: An oil distribution system for machinery such as a vacuum pump is disclosed. The system features an auxiliary oil pump integrally mounted adjacent to one end of the vacuum pump's drive shaft. The drive shaft drives the oil pump and has a longitudinal passage extending substantially along its length in communication with the outlet from the oil pump. Oil ports, positioned at points along the drive shaft adjacent to bearings supporting the drive shaft, extend from the passage. Lubricating oil, drawn from a reservoir by the oil pump, is pumped into the passage. The oil exits the passage via the oil ports and lubricates the bearings. The oil passes into the pump cylinder where it provides an oil seal between the piston and cylinder wall. Either a rotary vane pump or a gerotor-type pump is preferred as the auxiliary oil pump.

Abstract: A rotary positive displacement engine includes one or more power rotors, which are acted upon by a pressurized charge of gas, such as steam, and an annular barrier rotor geared for synchronous rotation with the power rotors. The rotors rotate within intersecting cylindrical bores in the engine housing. The power rotors have cylindrical outer surfaces from which opposed vanes extend which are acted upon by the powering charge. The barrier rotor has an outer cylindrical surface, located in close proximity to the cylindrical surface of the power rotors, and ports for delivering the powering charge to the power rotors. The barrier rotor thus forms both a charge delivery mechanism and a barrier between the exhaust ports and the expanding gas powering the engine. Located within the barrier rotor is a stator which has ports in fluid communication with the ports in the barrier rotor when the respective ports are aligned.

Abstract: In a scroll compressor (A) configured such that an oil is supplied to a compression chamber (14) between fixed and movable scrolls (10), (11) and to bearings (28), (29) for a crank shaft (8), an electric motor (7) and an oil reservoir 1a are placed in a discharge chamber (22), a discharge port (11c) for discharging a gas compressed in the compression chamber (14) is formed in an end plate (11a) of the movable scroll (11), and the crank shaft (8) is provided at the inside thereof with a discharge gas passage (8e) for causing the gas discharged through the discharge port (11c) of the movable scroll (11) to flowinto the discharge chamber (22). The sucked gas is prevented from being heated by a heat loss of the electric motor (7) or the oil thereby increasing the performance of the compressor (A) and a rise in cost for separating the oil from the compressed gas can be prevented.

Abstract: A high-pressure dome type compressor is capable of successfully cooling oil fed to sliding portions during a passage of oil in a drive shaft by discharge gas without causing the oil to be discharged along with the gas. In the drive shaft of a motor disposed in a casing and a moveable scroll of a compression section driven by the drive shaft, there are defined discharge gas passages for discharging, into the casing, compressed fluid compressed in a compression chamber of the compression element. An oil feed passage for oil pumped up from an oil reservoir at a bottom of the casing is defined in the drive shaft so as to be partitioned from the discharge gas passage.

Abstract: A rotary machine has two rotors (16,18) mounted for rotation on parallel axes, each in one of two intersecting cylindrical chambers (12,14). The rotor (16) has a hub (24) and a flap (26) extending radially from the hub into close proximity with, but not into contact with, the cylindrical wall of chamber (14). The rotor (18) has a hub and a radial recess (30) which accommodates the flap (26) as the rotors rotate. The rotors are linked to one another so that they rotate at the same angular speed but in opposite angular directions. The flap (26) divides the chamber (14) into two volumes, one either side of the flap. Working fluid is introduced through the first rotor and passes along a radial passage through the rotor to direct incoming working fluid from one side of the flap. into a volume on one side of the rotor. The working fluid can be provided from an external combustion chamber.

Abstract: The machine includes a fixed disk (2) comprising a spiral wall (3), a mobile disk (4) also comprising a spiral wall (5) cooperating with that of the fixed disk, and means (11, 16, 22, 23) for driving circular translation movement of the mobile disk, the mobile disk being positioned axially by a system including a shoe (25, 32, 36) rubbing between two lateral abutments (26, 27-34, 35-39, 40), one member of the pair of members (i.e.

Abstract: In order to provide, in vane pumps, an effective compensation of the radial and axial forces while at the same time increasing their useful service life, the vane pump for liquids is comprised of a slotted rotor (1) supported in a stator (4), wherein radially displaceable vanes (9) are slidingly disposed, which can be pressed slidingly supported while acted upon by centrifugal force, spring tension or otherwise by compressive force against a stator inside wall, in said process delivery cells are formed which expand or narrow in a crescent-like fashion and the entry of the liquid takes place through a hollow concentric stator and the filling of the vane cells from the inside to the outside. The rotor (1) is shaftless and of tubular construction, both sides are extended beyond the operating area determined by the vanes and the rotor is supported with the extensions in the outer stator, while the rotor possesses continuous vane slots from the internal to the external diameter.

Abstract: A rotating type scroll compressor according to the present invention having a closed shell that houses an electric drive member and a scroll compressing member, the scroll compressing member having a drive scroll member having a drive scroll member and a follower scroll member, the drive scroll member having a spiral shape wrap formed on a end plate and being driven by the electric drive member, the follower scroll member having a center axial line that deviates from a center axial line of the drive scroll member and a spiral shape wrap fitting to the wrap of the drive scroll member, said rotating type scroll compressor comprising rotating shaft portions to which radial force of the rotating drive scroll member and the follower scroll member is applied, said rotating shaft portions being disposed at an upper portion and a lower portion of the wraps to which the radial load of fluid is applied.

Abstract: A scroll mounting member for mounting a drive scroll therein is secured to a left end of a drive shaft coupled to a motor. A rotary bearing is fitted on the outer periphery of the scroll mounting member, and its outer periphery is secured to a scroll housing. The scroll mounting member is disposed for rotation in the scroll housing and is secured to the drive shaft. A bearing retainer for holding the rotary bearing is mounted by bolts via a spring in a mounting portion of the scroll housing such that the rotary bearing is adjustable in the thrust direction at the scroll housing. By turning the bolts, the rotary bearing is advanced or retreated in the thrust direction via the bearing retainer or the bearing retainer and a spring which, together with the bolts, provide adjustment. A self-lubricating sleeve seal is axially slidably fitted in an end portion of a rotation of driven scroll mounting member.

Abstract: There is disclosed a fluid driven motor of particular use, for example, in drilling apparatus or in powering underwater excavation apparatus. Known motors suffer from a number of problems, e.g. lack of sufficient hydraulic efficiency. According to one aspect of the present invention there is provided a motor comprising a stator and a rotor rotatably mounted in the stator, wherein the stator is provided with at least one rod recess formed in an inner surface thereof, the stator providing at least one inlet/exhaust port communicating between a surface of the rod recess and an outer surface of the stator, the rotor is provided with a rotor channel and at least one channel for conducting motive fluid from the rotor channel to a chamber between the rotor and the stator, and the at least one rod recess is provided with a rod which, in use, may form a seal between the stator and the rotor.

Abstract: A rotating type scroll compressor according to the present invention having a closed shell that houses an electric drive member and a scroll compressing member, the scroll compressing member having a drive scroll member having a drive scroll member and a follower scroll member, the drive scroll member having a spiral shape wrap formed on a end plate and being driven by the electric drive member, the follower scroll member having a center axial line that deviates from a center axial line of the drive scroll member and a spiral shape wrap fitting to the wrap of the drive scroll member, said rotating type scroll compressor comprising rotating shaft portions to which radial force of the rotating drive scroll member and the follower scroll member is applied, said rotating shaft portions being disposed at an upper portion and a lower portion of the wraps to which the radial load of fluid is applied.

Abstract: A drilling motor has been developed with a hollow tubular stator having at least one rod recess therein and an inlet port therethrough corresponding to each of the at least one rod recess; a rod movably disposed in each of the at least one rod recess; a tubular rotor movably disposed within the stator for rotation therein, the tubular rotor having a central motive fluid flow channel therethrough and extending along the length of the rotor, the rotor having one or more radial exhaust flow channels therethrough for providing a motive fluid flow path to the central motive fluid flow channel from at least one action chamber between the hollow tubular stator and tubular rotor; the tubular rotor having at least one rotor seal; and the at least one action chamber defined by an interior surface of the hollow tubular stator and an exterior surface of the tubular rotor, each of the at least one action chamber sealed at one end by the rod and at another end by one of the at least one rotor seals.

Abstract: A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains outlet ports and wing deflector cams that divide the space between housing and rotor into chambers. The rotor is provided with recesses in its periphery and there are cylindrical rollers in these recesses which rollers can move between an extended and a retracted position. A portion of the drilling mud that flows through a central conduit in the rotor passes through inlet ports and the recesses into the chamber portions and pushes rollers into their extended position and in a clockwise direction to thus make the rotor turn. Drilling mud of a lower pressure is pushed in from the corresponding chamber portion through the outlet ports into the annular space between the motor and the bore hole wall. When the rollers reach the wing deflector cams, they are forced into the retracted position and their subsequent tasks are then taken over by successive rollers.

Abstract: A scroll-type refrigeration compressor has a gas-liquid mixture discharge passage extending through the driver scroll drive shaft for discharging refrigerant gas and entrained lubricant into a high pressure chamber in the compressor housing. An anti-reverse rotation valve is connected to the distal end of the drive shaft and includes a valve housing with radially extending discharge ports and a closure member movable to prevent reverse flow of high pressure gas to the scroll compression chambers to prevent reverse rotation on compressor shutdown. A pressure equalization port may be formed in the valve closure member, valve housing or the distal end of the drive shaft to allow slow bleed down of pressure from the high pressure side to the low pressure side to minimize starting torque of the drive motor. The valve may be formed from a tubular metal housing and having a plug-type closure member slidably disposed therein with the housing being press fitted in a counterbore in the end of the shaft.

Abstract: A rolling piston type expansion machine eliminates the need for an open-close valve mechanism and smoothens the timing of inflow of high-pressure gas. The machine includes a cylinder having a discharge port and a roller freely gyratable or orbital in the cylinder. A freely movable blade supported in the cylinder has its tip in contact with the circumferential surface of the roller to form an expansion chamber. A gas passage is freely rotatably supported by a main bearing member and a secondary bearing member. The gas passage is formed in a main shaft having a crank shaft portion that gyrates or orbits the roller. An inlet port is provided along a shaft center of the main shaft. An inflow timing control portion controls inflow timing of the suction gas toward the expansion chamber via the inlet port of the gas passage.

Abstract: A fluid compressor includes a piston which has a vertical longitudinal axis. A plurality of working chambers are provided between a cylinder and the piston, and are constituted by upper working chambers and lower working chambers which separated from each other by a center portion of the piston. Fluid is sucked in the lowermost one of the upper working chambers and the uppermost one of the lower working chambers, respectively, and is compressed while being conveyed. The diameter .phi. D3 of a lower shaft portion of the piston and the diameter .phi. D4 of an upper shaft portion of the piston have a relationship .phi. D3 <.phi. D4 in order to apply an upward thrust force to the piston.

Abstract: An engine block mounts one or more rotors 16 within cylindrical rotor bores that are partially overlapped by cylindrical gate valve bores. A rotary gate valve is mounted within the gate valve bore and partially overlaps the rotating rotor. Angularly spaced lobes on the rotor are interspersed with angularly spaced flanges on the rotary gate valve. The lobes rotate within a groove that is closed off by movement of the flanges, thereby forming an expandable "combustion chamber" to propel the rotor about its axis. Incoming gases can be provided through and combusted within hollow portions of the rotor.

Abstract: Apparatus defining an expansible/contractible chamber includes a housing having a first housing portion and a second housing portion. A rotor rotates within the first housing portion in one direction while a block rotates in the second housing portion in an opposite direction. A vane disposed on the rotor registers with a recess in the block and defines with the block the chamber. The apparatus can function as an engine, a turbine, a pump, a compressor, or a vacuum pump. An associated method includes the steps of introducing a fluid into the chamber, rotating the rotor and associated vane in order to vary the volume of the chamber and performing work relative to the fluid in the chamber.

Abstract: A drilling motor has been developed with a hollow tubular stator having at least one rod recess therein and an exhaust port therethrough corresponding to each of the at least one rod recess; a rod movably disposed in each of the at least one rod recess; a tubular rotor movably disposed within the stator for rotation therein, the tubular rotor having a central motive fluid flow channel therethrough and extending along the length of the rotor, the rotor having one or more radial flow channels therethrough for providing a motive fluid flow path from the central motive fluid flow channel to at least one action chamber between the hollow tubular stator and tubular rotor; the tubular rotor having at least one rotor seal; and the at least one action chamber defined by an interior surface of the hollow tubular stator and an exterior surface of the tubular rotor, each of the at least one action chamber sealed at one end by the rod and at another end by one of the at least one rotor seals.

Abstract: Apparatus defining an expansible/contractible chamber includes a housing having a first housing portion and a second housing portion. A rotor rotates within the first housing portion in one direction while a block rotates in the second housing portion in an opposite direction. A vane disposed on the rotor registers with a recess in the block and defines with the block the chamber. The apparatus can function as an engine, a turbine, a pump, a compressor, or a vacuum pump. An associated method includes the steps of introducing a fluid into the chamber, rotating the rotor and associated vane in order to vary the volume of the chamber and performing work relative to the fluid in the chamber.

Abstract: A gear pump is used for the primary flow source for a low pressure, high performance separation system. The pump is controlled such that its flow and leakage characteristics are compensated by an electronic controller which results in controlled output flow rates to a variety of loads. The pump is particularly suited for use in liquid chromatography (LC) systems, especially LC systems which use membrane based separation media. A modification to the gear pump results in an efficient mixer, further enhancing its use in LC systems which involve gradient operational modes. Also disclosed are embodiments which allow the gear pump to be used in high pressure separation systems, e.g., high performance liquid chromatography (HPLC) systems.

Abstract: A high-side co-rotating refrigerant scroll compressor defines a lubricant sump in its discharge pressure portion. Lubricant is directed from that sump, through a passage which is at least partially defined by the shell of the compressor, to the bearings in which the scroll members rotate. Heat carried in the lubricant flowing through the passage is transferred through the compressor shell to the ambient. Subsequent to having lubricated the bearing in which the drive scroll member rotates, lubricant is diverted into a passage defined by the drive scroll member drive shaft and enters the stream of compressed discharge gas flowing therethrough. The lubricant is thereby prevented from entering the suction pressure portion of the compressor where it would otherwise heat compressor suction gas prior to the entry of that gas into the compressor's compression mechanism.

Abstract: A hermetic compressor for compressing the refrigerant in such a refrigerating systems as in refrigerators, freezers, air conditioners and the like, has a sliding part slidably inserted in one end of a hollow shaft, the hollow shaft is adapted to have a tantgential contact with a pumping cylinder, wherein the rotation of the sliding part according to the rotation of the shaft while the sliding part maintains contact with inside of the pumping cylinder allows to draw in and push out oil inside of the cylinder through a lubrication oil guide, the hollow of the shaft and discharge holes on the shaft to feed to each lubrication parts.

Abstract: A fluid compressor with bearing means disposed inside a rotary member includes a cylinder having an inner circumferential surface therein; supporting means for rotatably supporting both ends of the cylinder; a rotary member arranged in the cylinder so as to extend in the axial direction of the cylinder and be eccentric thereto, the rotary member having a spiral groove formed on an outer circumferential surface thereof, the spiral groove having pitches gradually narrowing with a distance from a suction-side end to a discharge-side end of the cylinder; a spiral blade fitted in the spiral groove so as to be slidable in the radial direction of the rotary member; and drive unit for rotating the cylinder and the rotary member, wherein the supporting member is characterized in that the supporting member is extended inwardly the rotary member from a base portion fixed to the case.

Abstract: A fluid compressor having a cylinder, columnar rotating body, first and second spiral grooves, first and second recessed grooves, first and second spiral blades slidable in a radial direction of the columnar rotating body and fitted in the first and second spiral grooves. A drive means is provided for causing a rotational movement of the cylinder and the columnar rotating body synchronously with each other. Stoppers extend from the cylinder into first and second recessed grooves whose wall portions are located adjacent to a respective first turn of the second and first spiral grooves and advanced by 180.degree. from a respective second and first spiral grooves. The first and second stoppers engage respective end portions of the spiral blades during the rotational movements of the cylinder and the columnar rotating body.

Abstract: A windage loss reduction system for a co-rotating scroll fluid device includes clearance reducing or optimizing elements mounted between rotating and fixed members of the scroll fluid device and which may be used individually or collectively to reduce centrifugal and axial fluid flow of ambient gases caused the rotating elements to improve the efficiency of the scroll fluid device. The windage loss reducing elements are located between fixed housing elements and the rotor, drive shaft, and scroll elements of the device.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine has a drive shaft which is coupled to a rotary part of a high pressure pump. A low pressure pump for supplying fuel to the high pressure pump has a rotor mounted about the drive shaft, a stator and side plates on opposite sides of the stator. The stator has an internal surface engaged by vanes carried by the rotor and one end plate has an arcuate outlet port which is connected to a transfer port formed in the side plate but inwardly of the outlet port. The transfer port is connected by passage means in the rotor with a fuel supply passage in the drive shaft.

Abstract: A scroll type fluid machinery which is provided with: a first scroll and a second scroll which moves with respect to the first scroll, where the base of the first scroll is provided with suction bores perforating through the base from the rear surface thereof to the front surface, and open at the outer peripheral portion of the front surface of the base, so that fluid released into an internal space of the body casing passes through the suction bores, and into the suction sides of compression volumes formed between spiral members of the scrolls, whereby suction pressure in the compression volumes is maximized and volumetric efficiency is improved.

Abstract: A synchronous rotating type scroll fluid machine has a first scroll member driven by a shaft of a first motor and having an end plate and a scroll wrap protruding from a surface of the scroll end plate, and a second scroll member driven by a shaft of a second motor and having a scroll end plate and a scroll wrap protruding from a surface of the scroll end plate. The machine further has a mounting structure for mounting the scroll members such that the axes of the scroll members are offset from each other and that said scroll wraps of the scroll members mesh with each other. Thrust balancing arrangements are provided for attaining a balance between the thrusting forces acting on each said scroll member, both at the mounting structure and said scroll members. The thrust balancing arrangement includes through-bores formed in the respective motor shafts and serving as passage bores for discharging a compressed gas.

Abstract: An engine of the internal combustion type having a plurality of cooperating adjacent parallel rotors of elliptical cross section having hollow interior flow passages communicating thru hollow supporting shafts forming a combustion chamber having a varying volume which depends upon the rotational position of the rotors. Each rotor has a second flow passage opening thru its interior surface communicating thru to slots at one apex of its major axis so as to provide valving for the combustion changer.

Abstract: A scroll-type fluid apparatus includes a housing whose interior is divided by upper and lower partitioning walls into chambers one over another, i.e., a discharge chamber communicating with a discharge port, an inlet chamber communicating with an inlet port and a drive chamber accommodating therein a motor. A first scroll member is disposed in the inlet chamber and has a lower surface formed integral with a first spiral scroll vane. A second scroll member is disposed in the inlet chamber at a location below the first scroll member and has a lower surface provided with a rotatable shaft which is rotatably supported in the lower partitioning wall. The second scroll member is integrally provided on an upper surface thereof with a second spiral scroll vane which is in mesh with the first scroll vane to form a plurality of variable-volume chambers. An oil pump is provided in the discharge chamber for supplying lubricant to contacting parts of the first and second scroll members.

Abstract: A scroll compressor having a first scroll member and a second scroll member includes a discharge valve device for closing an opening of a discharge port in which the discharge opening is disposed in at least one of the first and second scroll members. The discharge valve device is configured so that it is effected by a centrifugal force during operation of the scroll compressor. The centrifugal force normally maintains the discharge valve device in an open position with respect to the discharge opening. Thus, the discharge valve device is not actuated by a pressure difference between the discharge opening and the high pressure chamber and the scroll members are not rotated in reverse when operation of the scroll compressor is stopped.

Abstract: A tip seal supporting structure for use in a scroll fluid device includes intermeshing involute scroll elements mounted for relative orbital movement. Each of the scroll elements includes an involute spiral wrap which is secured to a respective wrap support plate at one axial end thereof. Each involute spiral wrap is provided with a tip seal in the other axial end thereof which engages with the wrap support plate of the other scroll element. One of the wrap support plates includes a substantially, centrally located fluid passage into which the innermost end of the involute spiral wrap of the other scroll element extends during a predetermined portion of the relative orbital movement between the scroll elements.

Abstract: A compressor includes a casing having an oil reservoir, a cylinder situated within the casing, a cylindrical rotary body situated eccentrically within the cylinder, the rotary body having first and second spiral grooves extending in opposite directions from the middle part of the rotary body to both ends of the rotary body, first and second spiral blades fitted in the first and second spiral grooves, the blades having outer peripheral surfaces brought into contact with the inner peripheral surface of the cylinder, dividing the space defined by the inner peripheral surface of the cylinder and the rotary body into a plurality of working chambers, thereby constituting first and second compression sections, wherein the first and second blades freely project from and retreat in the first and second spiral grooves in the radial direction of the rotary body, driving means for rotating the cylinder and the rotary body relative to each other, a first refrigerant passage formed in the rotary body and opening to an area

Abstract: In a co-rotational scroll apparatus having two interleaving scroll wraps secured to end plates rotating about parallel, non-concentric axes, a precharging device affixed to one end plate and substantially enclosing the scroll wraps and the second end plate. Preferably, the precharging device includes a cup-shaped drive housing secured to one end plate and enclosing the scroll wraps, and a flexible torque-transmitting member connecting between the enclosure member and the second end plate. Apertures are provided in the enclosure member to permit fluid flow into the space enclosed by the enclosure device, with vanes disposed adjacent the apertures to force fluid into the enclosed space during rotation of the scroll wraps. Fluid thus forced into the enclosed space is precharged prior to entering the scroll wraps, being at higher pressure than fluid exterior the enclosed space, improving the operating efficiency of the scroll apparatus.

Abstract: A rotary engine includes a housing in which two rotors are mounted on mutually transverse axes and are provided with lobes which interact with the sides of the other rotor to provide compression and combustion chambers in which a fuel is compressed and subsequently fired to exert a torque on one of the rotors as the rotors rotate in synchronism.

Abstract: A scroll-type fluid machine has a drive scroll which is rotatably supported by a novel bearing arrangement. The bearing arrangement includes a bearing housing which is detachably mounted on a casing of the fluid machine. A journal bearing which rotatably supports a drive shaft of the drive scroll is secured inside the bearing housing. An oil seal surrounds the drive shaft beneath the bearing, and grease fills the space between the bearing and the oil seal.

Abstract: In a co-rotational scroll apparatus having two interleaving scroll wraps secured to end plates rotating about parallel, non-concentric axes to produce a relative orbital motion, a means for providing positive lubricant flow through the scroll wraps. A sump is provided adjacent the idler scroll member for supplying lubricant to a lubricant pump disposed in the lower end of the shaft of one scroll member. A lubricant gallery is provided in the scroll shaft for receiving the lubricant from the pump and directing the lubricant through passages in the scroll shaft to lubricate the scroll shaft bearing and for directing lubricant to passages in the end plate of the scroll member to be discharged adjacent the outer ends of the scroll wraps into the alternatively open and closed first chamber formed by the scroll wraps.

Abstract: In a co-rotational scroll apparatus having two interleaving scroll wraps secured to end plates rotating about parallel, non-concentric axes to produce a relative orbital motion, a coupling for causing concurrent rotation and for enhancing the nutational stability of the scroll element. In the preferred embodiment, the nutation reducing means is comprised of an Oldham-type coupling engaging extension members on one of the scroll end plates and drive keys on the other respective end plate. The angular disposition thereof is optimized to cause the Oldham coupling to generate during rotation a moderating moment load in opposition to the tipping moment load of at least one of the scroll elements and thereby enhance the nutational stability of the scroll elements. The moderating moment load of the coupling imposed on the scroll elements may be altered by varying the angular and radial disposition of the center of gravity of the coupling.

Abstract: A scroll-type fluid machine has a pair of interfitting scrolls. Each scroll has a discharge port at its center which communicates with a discharge chamber via a discharge passage formed in the scroll. A check valve is disposed in each discharge port.

Abstract: Here is disclosed a full system rotatable scroll type fluid handling machine having a casing containing therein an electromotor, a driver scroll member and a follower scroll member, these two scroll members being rotatably driven by said electromotor to perform compression of refrigerant, wherein the casing is formed therein with a boss around which a shaft of a coupling is mounted so as to serve also as a rotational shaft of the electromotor for rotatably driving the driver scroll member and the boss supports a follower shaft of the follower scroll member. In this manner, several functions to which separate locations have conventionally assigned can be achieved on a single location, allowing an axial length of the machine to be reduced and thereby a compact machine to be obtained.