Abstract: A dual-drive co-rotating scroll device includes a housing; a first scroll rotatably mounted within the housing via a first cylindrical extension and a first plurality of bearings, and having a first axis of rotation; and a second scroll rotatably mounted within the housing via a second cylindrical extension and a second plurality of bearings, and having a second axis of rotation different than the first axis of rotation. At least one of the first cylindrical extension and the second cylindrical extension may comprise a plurality of permanent magnets and operate as a rotor of a first motor. An Oldham ring may be positioned between the first scroll and the second scroll and configured to maintain a relative angular position between the first scroll and the second scroll.

Abstract: The present invention relates to a fluid compressor comprising: a driving module comprising a driving motor embedded in a motor case; and a compression module comprising a rotor, which is rotatably driven by a driving motor and which has a plurality of variable blades radially provided along the outer peripheral surface thereof, a rotor housing for encompassing the rotor, and a cover of the rotor, for closing the rotor housing, wherein the compression modules are stacked and airtight to block contact between fluid passing through the compression module and air outside the compression module, so that the fluid flowing into any one compression module sequentially passes through the remaining compression modules. The rotary shafts provided in each center of the rotors are connected a shaft coupler. The present invention simultaneously achieves a high-efficiency compression ratio and reduces noise caused by the excessive velocity of any compression module.

Abstract: A full-metal dynamic-sealed concentrically-centered downhole displacement motor includes an outer tube, a stator fixed in the outer tube, a rotor rotatably connected in the stator, and a flow distribution shaft suspended in the rotor. When the rotor rotates, the plurality of circulation ports is alternately communicated with the flow distribution holes, and an accommodation space for flowing the drilling fluid is formed among the plurality of rotor copper rods; each of the circulation ports has a notch on the side of the rotor copper rod that is in communication with the accommodation space; the stator is provided with pressure relief ports for allowing the annular chamber and the accommodation space to communicate with each other, and the flow distribution hole and the pressure relief port are circumferentially arranged in a staggered manner.

Abstract: A protective covering for a shaft output of a transfer gearbox, comprising a solid, inelastic protective covering body, wherein the protective covering body has substantially the form of a frustoconical casing in order to surround a shaft in the region of the shaft output, having a first opening at a first axial end and a second opening at a second axial end, situated opposite from the first end, of the protective covering body, wherein the first opening is larger than the second opening, wherein the second opening is formed to surround the shaft, wherein, in the region of the first opening, a flange portion, lying at the top in the installed position, of the protective covering body is formed to be fastened to a housing of the transfer gearbox, wherein, in the region of the first opening, a portion, lying at the bottom in the installed position, of the protective covering body is formed to provide an outflow opening when the flange portion is fastened to the housing of the transfer gearbox.

Abstract: A compressor is provided that may include a refrigerant flow path provided in a rotational shaft so as to guide a refrigerant gas. The rotational shaft operates a compression device using a drive force of an electric motor. In such a structure, the refrigerant gas may be directly discharged to a discharge space without passing through other portions such that flow path resistance may be minimized.

Abstract: A scroll compressor may include a frame, an orbiting scroll provided with at least one first key groove, a non-orbiting scroll provided with at least one second key groove and coupled to the orbiting scroll to form a compression chamber, and an anti-rotation ring disposed between the frame and the orbiting scroll. The anti-rotation ring may include a ring, at least one first key that axially extends from a first surface of the ring and slidingly coupled to the at least one first key groove of the orbiting scroll, and at least one second key that axially extends from the first surface of the ring and slidingly coupled to the at least one second key groove of the non-orbiting scroll. The first and second keys may be provided along a circumferential direction. This may allow processability of a one-way anti-rotation ring. Further, increase in weight may be prevented while reducing deformation by providing a weight-reduced portion in addition to a reinforcing portion.

Abstract: A primary groove, into which a primary vane is slidably fitted, and a primary rotor-side suction passage, which conducts refrigerant of a shaft-side suction passage of a shaft to a primary compression chamber, are formed at a primary rotor. The primary groove is shaped into a form that extends from an inner peripheral side toward an outer peripheral side and extends toward a rear side with respect to a rotational direction, and the primary rotor-side suction passage is shaped into a form that extends from the inner peripheral side toward the outer peripheral side and extends and tilts toward a front side with respect to the rotational direction. A fluid outlet of the primary rotor-side suction passage opens at a location that is immediately after the primary groove on the rear side of the primary groove with respect to the rotational direction.

Abstract: A compressor may include a first compression member, a second compression member, and a motor assembly. The second compression member is movable relative to the first compression member and cooperates with the first compression member to define a compression pocket therebetween. The motor assembly drives one of the first and second compression members relative to the other one of the first and second compression members. The motor assembly includes a stator and a rotor. The rotor is rotatable relative to the stator about a rotational axis. The stator surrounds the rotational axis. The rotor may include magnets that are arranged around the rotational axis. The magnets may be spaced apart from the stator in an axial direction that is parallel to the first rotational axis.

Abstract: A fluid delivery system having at least one fluid storage device and a pump with at least one fluid driver with a flow-through shaft that has a through-passage. The pump includes a casing, and at least one fluid driver having a prime mover and at least one fluid displacement member. A shaft of the prime mover and/or a shaft of the fluid displacement member and/or a common shaft of the prime mover/fluid displacement member (depending on the configuration of the pump) is a flow-through shaft with a through-passage configuration that allows fluid communication between at least one port of the pump and the at least one fluid storage device.

Abstract: A compressor may include a first compression member, a second compression member, and a motor assembly. The second compression member is movable relative to the first compression member and cooperates with the first compression member to define a compression pocket therebetween. The motor assembly drives one of the first and second compression members relative to the other one of the first and second compression members. The motor assembly includes a stator and a rotor. The rotor is rotatable relative to the stator about a rotational axis. The stator surrounds the rotational axis. The rotor may include magnets that are arranged around the rotational axis. The magnets may be spaced apart from the stator in an axial direction that is parallel to the first rotational axis.

Abstract: An attachment structure is for attaching a compressor to an attachment surface of an attachment target member. The compressor is a scroll type compressor and has a housing, a fixed scroll and a movable scroll. The housing is fixed to the attachment surface. The fixed scroll is fixed inside the housing and has a fixed-side tooth having a scroll shape. The movable scroll has a movable-side tooth having a scroll shape and engaging with the fixed-side tooth. The movable scroll revolves with respect to the fixed scroll. A central axis around which the movable scroll revolves is parallel with the attachment surface. A vibration direction, which is included in a radial direction of the compressor and in which a vibration component becomes largest, is different from a normal direction when viewed in an axial direction of the central axis.

Abstract: A motor unit, which drives a compressor unit, includes a stator, which generates a rotating magnetic field, and a rotor, which is rotated about a rotational axis by the rotating magnetic field at an inner side of the stator. A drive circuit unit is placed at the inner side of the stator such that a position of the drive circuit unit in a direction of the rotational axis overlaps with the stator.

Abstract: The invention relates to a gear wheel pump with two meshing gear wheels which are rotatably mounted within a pump housing by means of a driven driveshaft and a crankshaft journal and which form a pumping channel system between a pump inlet and a pump outlet. Several gaps are formed between the pump housing, the gear wheels, the driveshaft, and the crankshaft journal. One of the gaps between the driveshaft and one of the gear wheels contains means for the rotationally fixed connection of the driveshaft to the gear wheel. In order to prevent leakages penetrating to the connecting means, according to the invention the gap between the driveshaft and the gear wheel is sealed, with respect to the front faces of the gear wheel, by means of a sealant.

Abstract: Rotary components are described that include a housing comprising a rotor having a rotor working face and a gate having a gate working face and a pocket; at least one vane, wherein the vane is coupled to the rotor; at least one wiper coupled to the vane; a plurality of endplates coupled to the housing, wherein at least one of the endplates is a float plate; an intake chamber; and an outlet chamber. In addition, methods of aspirating a working medium by utilizing the rotary component having at least one float plate includes pulling the working medium into the intake chamber, depositing the working medium into a working chamber that is located between the intake chamber and the outlet chamber; maintaining the working medium in a stationary position until the vane sweeps around toward the outlet chamber; accumulating the working medium into the outlet channel of the outlet chamber; and centrifugally ejecting the working medium into the outlet chamber and out of the system.

Abstract: A fluid transfer engine employs a case with a cylindrical inner wall having an operating radius extending from a case axis. A main rotor is carried within the case and incorporates a lobe with a major radius equal to and concentric with the operating radius of the case, the main rotor having a minor radius defining a body. Two peripheral rotors are diametrically opposed with respect to the case axis and rotate within rotor chambers extending from the case. Each peripheral rotor has a radius equal to the minor radius and a center of rotation located at twice the minor radius from the case axis. Each of the peripheral rotors rotates in uniform circular motion with the main rotor in sealing contact with the body and incorporates a sculpted recess for receiving the lobe of the main rotor.

Abstract: A rotary engine has a cycloid rotor and a sealing grid including a face seal that rotates with the rotor, and including other seals that do not rotate with the rotor. As the rotor rotates within a housing, the rotor, housing and seal grid form at least one working chamber between them, the chamber undergoing a change from initial volume V1 to V2, which is less than V1, thus compressing a working medium, and subsequently expanding to volume V3, which may be larger than V1, such that the chamber volume is a smooth and continuous function of rotor's rotational angle.

Abstract: A vane pump 1 has a pump chamber 2A through an axial direction oil supply hole 11a, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c of an oil supply passage 11. A gas passage 13 contains a gas groove 13a whose one end is made to communicate with an outer space, the gas groove 13a being formed on an outer peripheral surface of a shaft part 3B of a rotor 3, and the other end of this gas groove is made to intermittently overlappingly communicate with the axial direction oil supply groove 11c by a rotation of the rotor.

Abstract: A vane pump in which a lubricating oil from an oil supply pipe 12 is supplied to a pump chamber 2A through an axial direction oil supply hole 11a of an oil supply passage 11, a diameter direction oil supply hole 11b, and an axial direction oil supply groove 11c. A gas passage 13 includes a diameter direction gas hole 13a and an axial direction gas groove 13b, and the diameter direction gas hole 13a is made to communicate with the axial direction gas groove 13b when the diameter direction oil supply hole 11b is made to communicate with the axial direction oil supply groove 11c.

Abstract: An oil supply groove in communication with a pump room is formed above a bearing of a housing, and an open air groove in communication with atmospheric air is formed at a position rotated around the bearing by 90° from the oil supply groove. In a shank of a rotor, a branch passage branching from an oil passage formed in its axial direction to the diametrical direction of the shank and an open air passage formed in the direction perpendicular to the branch passage are formed. The branch passage and the oil supply groove communicate with each other while the open air passage and the open air groove are arranged to also communicate with each other.

Abstract: A fluid transfer engine employs a case with a cylindrical inner wall having an operating radius extending from a case axis. A main rotor is carried within the case and incorporates a lobe with a major radius equal to and concentric with the operating radius of the case, the main rotor having a minor radius defining a body. Two peripheral rotors are diametrically opposed with respect to the case axis and rotate within rotor chambers extending from the case. Each peripheral rotor has a radius equal to the minor radius and a center of rotation located at twice the minor radius from the case axis. Each of the peripheral rotors rotates in uniform circular motion with the main rotor in sealing contact with the body and incorporates a sculpted recess for receiving the lobe of the main rotor.

Abstract: A scroll fluid machine has a stationary scroll having a stationary scroll lap fixed to a scroll casing and an orbiting scroll having an orbiting scroll lap that orbits relative to the stationary scroll lap. The stationary and orbiting scrolls are connected via a coupling mechanism other than an Oldham coupling or pin crank type mechanism having sliding parts. The coupling mechanism includes plate springs that connect the stationary scroll to the orbiting scroll. The orbiting scroll lap engages with the stationary scroll lap to form a closed compression chamber.

Abstract: A scroll fluid machine has a stationary scroll having a stationary scroll lap and an orbiting scroll having an orbiting scroll lap that orbits relative to the stationary scroll lap. The orbiting scroll lap engages with the stationary scroll lap to form a closed compression chamber. An intermediate ring is positioned to surround the orbiting scroll lap. A plurality of first plate springs connect the intermediate ring and the orbiting scroll, while supporting the intermediate ring to enable the intermediate ring to move in a first direction orthogonal to a rotation axis of the machine. A plurality of second plate springs connect the intermediate ring and the stationary scroll, while supporting the intermediate ring to enable the intermediate ring to move in a second direction orthogonal to the rotation axis of the machine as well as orthogonal to the first direction.

Abstract: The problems of prior compressor structures relying upon conventional check valves are obviated by using, instead, flow control passages which operate to control flow while avoiding mechanical moving elements which may become problematical.

Abstract: In an embodiment, a vacuum pump is capable of preventing adhesion of by-products to its surfaces. The vacuum pump includes a stator. The stator includes a cylinder wall and a pair of diaphragms disposed at opposite ends of the stator. A rotary shaft passes through the diaphragms, and a lobe is attached to the rotary shaft in the stator. The lobe may include a fluid port, and the fluid port may be disposed in sidewalls of the lobe to face the diaphragms. The rotary shaft may include a fluid supply path in communication with the fluid port.

Abstract: A motor driven by pressure medium supplied from an external pressure source. The motor comprises a motor casing with a working chamber, a stator pail which forms an axial supply pipe for supply of pressure medium to the working chamber, a rotor part which is rotatably mounted on the stator part and eccentrically arranged in the working chamber, the rotor part and the stator being provided with inlet ports for supply of pressure medium to the working chamber, a hinge part mounted on the rotor part and provided with a pivotably mounted piston which divides the working chamber into a pressure chamber and a discharge chamber, and a constantly open discharge opening which is arranged in the wall of the motor easing from the discharge chamber through which the medium is discharged.

Abstract: A rotary engine configured to use compressed air or high pressure steam to produce power. It has a casing with two peripheral exhaust ports each adjacent to a flattened area, a rotor having three slotted pistons, and a center valve with two opposed inlet ports that provide high pressure steam or compressed air to the pistons. Each rotor revolution produces three power strokes. Furthermore, the volume of air used for a single cycle is reduced, as a result of the air traveling through its pistons. Also, the engine stops when the vehicle it powers is at rest, and a spring inside each piston causes its angled tip to contact the rotary chamber upon start up. In addition, it is inexpensive to manufacture, as there is not much tooling needed to make the rotary engine, and it has only four moving parts, its rotor and the three pistons attached to it.

Abstract: A fluid machine includes a stationary scroll member and a movable scroll member. A second tooth portion of the movable scroll member is arranged to be revolved with respect to a first tooth portion of the stationary scroll member and to form an operating chamber between the movable scroll member and the stationary scroll member. The operating chamber is changeable in accordance with a revolution of the movable scroll member to be defined between two sliding contact portions, and is dividable into first and second operating chambers. The second tooth portion is provided with a passage portion through which an introducing port for introducing a fluid to the operating chamber communicates with the second operating chamber when the introducing port communicates with the first operating chamber. The passage portion disconnects the introducing port from the second operating chamber when the introducing port is disconnected from the first operating chamber.

Abstract: A rotary pump for fluids comprising a shaft to rotate about a longitudinal axis and a cylindrical rotor centrally secured to that shaft. A housing encasing the shaft and rotor includes, interior end walls adjacent to the rotor disks and an interior side wall. Fluid inlet and outlet ports are provided at spaced locations in the housing side wall. Paddles are pivotably secured to the rotor in pockets in the rotor, to pivot about points at rearward sides of the paddles, for movement between extended positions with the paddles extending outwardly beyond the cylindrical surface of the rotor and retracted positions where the paddles are seated entirely within their corresponding pockets. A means is provided to bias each paddle towards the extended position, but to allow the paddle to move towards that extended position, but to allow the paddle to move towards the retracted position.

Abstract: The present invention generally relates to an apparatus and method for use in a wellbore. In one aspect, a downhole tool for use in a wellbore is provided. The downhole tool includes a housing having a shaped inner bore, a first end and a second end. The downhole tool further includes a rotor having a plurality of extendable members, wherein the rotor is disposable in the shaped inner bore to form at least one chamber therebetween. Furthermore, the downhole tool includes a substantially axial fluid pathway through the chamber, wherein the fluid pathway includes at least one inlet proximate the first end and at least one outlet proximate the second end. In another aspect a downhole motor for use in a wellbore is provided. In yet another aspect, a method of rotating a downhole tool is provided.

Abstract: A rotary machine (10) comprises an inner housing (12) having valving means (14) which includes a shaft (15) for directing working fluid through the machine (10) and, an outer housing (16) within which the inner housing resides. A working chamber (18) is defined between the inner and outer housings (12 and 16). A plurality of gates (20) are supported by the inner housing and are swingable along their respective longitudinal axis between a sealing position in which the gates form a seal against surface (22) of outer housing (16) and a retracted position in which the gates (20) lie substantially against surface (24) of the housing (12).

Abstract: This invention concerns pumping fluids to both high pressures and high flow rates and thus has a very high power density. The technology pertains to both fluid power and to fluid transfer and is adaptable to a wide scope of use. The concept is a very simple rotary variable displacement expansible chamber pump which can also be a rotary kinetic pump and thus is a hybrid. At a positive displacement setting, the pump primes by positive displacement, then as the rotational speed increases; the pump gains a kinetic pumping component, then as head pressure increases the pump again becomes positive displacement. At a zero displacement setting, the pump is purely a rotary kinetic pump. The variable displacement feature allows both performance and efficiency. The porting allows very high rotational speeds and flow rates near to centrifugal designs. When set at zero displacement, the device has features both of positive displacement fan (gear pump) and kinetic (centrifugal pump). The pump is vibration free and silent.

Abstract: An orbiting rotary compressor assembly having a compression mechanism disposed in a housing and including relatively moving fixed and orbiting compression members including extending portions having surfaces engaged with each other and between which a compression chamber is located. The orbiting member has a centrally-located hub which moves eccentrically relative to the axis of rotation of a drive shaft in driving engagement with the hub. A vane operatively engages the fixed member extending portion and the orbiting member extending portion, and partially defines the compression chamber. An Oldham coupling is disposed about and is in engagement with the hub, and is in engagement with the fixed compression member, rotation of the orbiting compression member being prevented by the Oldham coupling.

Abstract: Scroll compressors (1) may include a housing (2, 3) having an inlet port (3a) and an outlet port (3b). A drive scroll (10) may be rotatably disposed within the housing and may have a rotational axis. A driven scroll (20) may be rotatably disposed within the housing and may have a rotational axis. The driven scroll rotational axis preferably is offset to the drive scroll rotational axis. Further, at least one compression chamber (30) is preferably defined between the drive scroll and the driven scroll. A first bearing (14) may rotatably support the drive scroll in a cantilever manner and a second bearing (24, 115) may rotatably support the driven scroll in a cantilever manner. A transmission (31, 131, 231 and 331) or other device may be provided to rotate the drive scroll in synchronism with the driven scroll.

Abstract: A system for downhole drilling and coring includes a roller vane motor for driving a drill bit. The motor has a single jacket with a lower end and an upper end and being embodied such that all drilling fluid passes inside the jacket to the drill bit. The system further has a bent sub connected to the upper end of the motor. The jacket has outwardly projecting curved members forming recesses therebetween for the passage of return drilling fluid, the curved members creating a circular surface having a diameter approximately equal to that of the drill bit. The curved members as well as the recesses therebetween each extend in longitudinal direction over the full length of the jacket of the motor.

Abstract: Scroll compressors (1) may include a housing (2, 3) having an inlet port (3a) and an outlet port (3b). A drive scroll (10) may be rotatably disposed within the housing and may have a rotational axis. A driven scroll (20) may be rotatably disposed within the housing and may have a rotational axis. The driven scroll rotational axis preferably is offset with respect to the drive scroll rotational axis. Further, at least one compression chamber (30) is preferably defined between the drive scroll and the driven scroll. First bearings (14, 16, 16a) may rotatably support one of the drive scroll and the driven scroll in a straddle manner. A second bearing (24) may rotatably support the other of the drive scroll and the driven scroll in a cantilever manner. A transmission (31, 131, 231 and 331) or other device may be provided to rotate the driven scroll in synchronism with the drive scroll.

Abstract: A scroll-type compressor has a fixed scroll member, a movable scroll member, a front housing, a rear housing and a gasket seal. The fixed scroll member and the movable scroll member cooperate to form a compression region. The movable scroll member orbits relative to the fixed scroll member to compress refrigerant in the compression region. A movable scroll base plate of the movable scroll member forms a rear surface and a discharge hole substantially at the center of the movable scroll base plate. Pressure of the refrigerant discharged from the compression region is applied to the rear surface of the movable scroll base plate. The front housing accommodates the movable scroll member. The rear housing which is adjacent to the front housing, has the fixed scroll member inside. The gasket seal is located between the front housing and the rear housing.

Abstract: This invention concerns pumping fluids to both high pressures and high flow rates and thus has a very high power density. The technology pertains to both fluid power and to fluid transfer and is adaptable to a wide scope of use The concept is a very simple rotary variable displacement expansible chamber pump which can also be a rotary kinetic pump and thus is a hybrid. At a positive displacement setting, the pump primes by positive displacement, then as the rotational speed increases; the pump gains a kinetic pumping component, then as head pressure increases the pump again becomes positive displacement. At a zero displacement setting, the pump is purely a rotary kinetic pump. The variable displacement feature allows both performance and efficiency. The porting allows very high rotational speeds and flow rates near to centrifugal designs. When set a zero displacement, the device has features both of positive displacement fan (gear pump) and kinetic (centrifugal pump). The pump is vibration free and silent.

Abstract: A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains wing deflector cams that divide the space between the housing and the rotor into a high-pressure chamber and a low-pressure chamber. The housing at one of its axial ends has a first bearing part for the rotor, wherein the rotor at the side of the first bearing part is provided with a central inlet conduit that is connected with the rotor space for the supply of driving fluid. The housing has a second bearing part for the rotor, the housing at or near each rising part of the wing deflector cams being provided with one or more outlet ports that are connected with the rotor space and a connecting channel outside the second bearing part. The connecting channel is connected with an opening in the part of the rotor that serves for attaching a drill bit.

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 compressors may preferably include, for example, a stationary scroll, a drive shaft member, a movable scroll, a bearing member, a compression chamber, a discharge port, a discharge valve and a discharge valve clamping device. The drive shaft member may revolve around a revolution axis. The bearing member may be disposed between the movable scroll and the drive shaft member in order to transmit the revolution of the drive shaft member to the movable scroll. The compression chamber may be defined by a space formed between the stationary scroll and the movable scroll. The compression chamber compresses the fluid drawn into the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. The discharge port is disposed within the movable scroll and is adapted to discharge fluid within the compression chamber to the opposite side of the stationary scroll. The discharge valve clamping device is preferably affixed to the movable scroll.

Abstract: Scroll compressors may preferably include, for example, a stationary scroll, a drive shaft member, a movable scroll, a bearing member, a compression chamber, a discharge port, a discharge valve and a discharge valve clamping device. The drive shaft member may revolve around a revolution axis. The bearing member may be disposed between the movable scroll and the drive shaft member in order to transmit the revolution of the drive shaft member to the movable scroll. The compression chamber may be defined by a space formed between the stationary scroll and the movable scroll. The compression chamber compresses the fluid drawn into the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. The discharge port is disposed within the movable scroll and is adapted to discharge fluid within the compression chamber to the opposite side of the stationary scroll. The discharge valve clamping device is preferably affixed to the movable scroll.

Abstract: Spiral fixed scroll teeth (2a) project from an end plate (2b) of a fixed scroll (2), and spiral movable scroll teeth (4a) project from an end plate (4b) of a movable scroll (4). The end plate (4b) of the movable scroll (4) is provided with a discharge port (8) for discharging compressed refrigerant gas. A pressure chamber (16) is provided on the back surface of the end plate (2b). A port (10) communicating with the pressure chamber (16) is provided on a position of the end plate (2b) opposed to the discharge port (8). Thus obtained is a scroll compressor reducing pulsation when discharging a fluid by feeding the compressed fluid into the pressure chamber.

Abstract: Scroll compressors may preferably include a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft and a bush coupled to the outer surface of the crank shaft. A seal is preferably disposed between the bush and the crank shaft and the seal is elastically deformable in the radial direction of the crank shaft. A movable scroll may be coupled to the crank shaft and disposed adjacent to the stationary scroll. A compression chamber is defined by a space between the stationary scroll and the movable scroll, such that fluid is compressed within the compression chamber when the movable scroll revolves or orbits with respect to the stationary scroll. Further, a discharge port is preferably defined within the movable scroll and adapted to release the compressed fluid to a side that is opposite of the stationary scroll.

Abstract: A roller vane motor having a housing and a stator positioned on an inside surface of the housing. The stator has an internal wall with an inlet port and an outlet port and the portion of this internal wall at the outlet port tapers open at an angle of less than 45 degrees relative to a tangent of the internal wall. A rotor assembly is positioned within the stator. The rotor assembly includes: i) a rotor shaft, ii) a plurality of flutes extending from the rotor shaft; and iii) cylindrical rollers positioned between said flutes.

Abstract: Scroll compressors (1) may include a housing (2, 3) having an inlet port (3a) and an outlet port (3b). A drive scroll (10) may be rotatably disposed within the housing and may have a rotational axis. A driven scroll (20) may be rotatably disposed within the housing and may have a rotational axis. The driven scroll rotational axis preferably is offset with respect to the drive scroll rotational axis. Further, at least one compression chamber (30) is preferably defined between the drive scroll and the driven scroll. First bearings (14, 16, 16a) may rotatably support one of the drive scroll and the driven scroll in a straddle manner. A second bearing (24) may rotatably support the other of the drive scroll and the driven scroll in a cantilever manner. A transmission (31, 131, 231 and 331) or other device may be provided to rotate the driven scroll in synchronism with the drive 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 stantionary 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 clerance 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 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: The pressure leakage from the back pressure chamber installed at the back side of the movable scroll to the low pressure area can be prevented. An eccentric shaft (17) formed integrally to a drive shaft (14) is inserted into a bushing (19). A balance weight (18) is fixed to the bushing (19). A cylindrical portion (34) is provided so as to protrude at the back side of the movable scroll base (22), and the bushing (19) supports the cylindrical portion (34) via a needle bearing (21). A seal member (35) is interposed between the end surface of the cylindrical portion (34) and the balance weight (18). The inside of a cylinder of the cylindrical portion (34) is made to be a back pressure chamber (36).

Abstract: A scroll-type compressor has a fixed scroll member, a movable scroll member, a front housing, a rear housing and a gasket seal. The fixed scroll member and the movable scroll member cooperate to form a compression region. The movable scroll member orbits relative to the fixed scroll member to compress refrigerant in the compression region. A movable scroll base plate of the movable scroll member forms a rear surface and a discharge hole substantially at the center of the movable scroll base plate. Pressure of the refrigerant discharged from the compression region is applied to the rear surface of the movable scroll base plate. The front housing accommodates the movable scroll member. The rear housing which is adjacent to the front housing, has the fixed scroll member inside. The gasket seal is located between the front housing and the rear housing.

Abstract: A hydraulic pump has a housing with an inner toothed ring, and an outer toothed wheel eccentrically mounted within the ring, with pressure pocket space between the teeth of the ring and the wheel. The wheel is eccentrically rotatably and orbitally mounted within the ring. A rotary slide valve is mounted within the wheel. A valve plate with an open center is adjacent the wheel. A rotary slide valve is positioned within the open center of the valve plate. Fluid under pressure in passageways is provided to a front group of pressure pocket spaces to cause the wheel to rotate. A shaft is operatively connected to the wheel.