Abstract: A vane pump (101) for an automatic transmission includes a suction-side behind-vane pressure duct (112) and a pressure-side behind-vane pressure duct (111). The suction-side behind-vane pressure duct (112) is connected to the pressure side (116) of the vane pump (1). A valve device (113, 114) is connected to the pressure-side behind-vane pressure duct (111). During operation of the vane pump (101), a pressure-side behind-vane pressure (p DH) can be set in the pressure-side behind-vane pressure duct (111) with the valve device (113, 114).

Abstract: A vane pump includes: a rotor; vanes freely slidably received in the rotor; a cam ring having a cam face with which the vanes come into sliding contact; a side member having a sliding contact surface with which side surfaces of the rotor and the vanes come into sliding contact; pump chambers; and a discharge port configured to guide working fluid discharged from the pump chambers. The side member has a guide surface that is provided on an end portion side of the opening portion, the guide surface being configured to push the end portions of the vanes upward and guide them toward the sliding contact surface of the side member as the rotor is rotated in the reverse rotation direction.

Abstract: A hermetic compressor includes a casing, a cylinder in the casing, a first bearing and a second bearing defining a compression space together with the cylinder, a roller located at an eccentric position with respect to an inner surface of the cylinder and configured to vary a volume of the compression space, and a vane inserted into the roller to rotate together with the roller, and drawn out toward the inner surface of the cylinder to divide the compression space into compression chambers. An inlet port in communication with the compression space is defined in the first bearing, and an intermediate plate is located between the cylinder and the inlet port and defines a suction passage connected to the inlet port, where a peripheral length of an inner peripheral surface of the suction passage is greater than a peripheral length of an outer peripheral surface of the suction passage.

Abstract: A transfer device that includes a case that houses a transfer mechanism; a strainer that suctions oil stored in a lower portion of the case; a valve body that has a hydraulic supply circuit that supplies a hydraulic pressure to the transfer mechanism and a suction oil path that discharges an extra hydraulic pressure that is extra for the hydraulic supply circuit; a first suction inlet that communicates with one of the suction oil path and the strainer and a second suction inlet that communicates with the other of the suction oil path and the strainer, and a balanced vane pump.

Abstract: A rotary combustion engine system is provided with compression unit and expansions unit offset which communicate through a transfer port. Each unit defines a toroidal chamber extending annularly about a central cavity, and a plurality of curved pistons displaced within the toroidal chamber to variably form a plurality of sub-chambers therein. A rotor member in each unit is eccentrically coupled to a mechanical member and linked by a plurality of swing rod members to the curved pistons. The curved pistons of the expansion unit are advanced by recursive combustion within sub-chambers defined therebetween, to drive angular displacement of the rotor member. The rotor member in the compression unit is angularly displaced with the mechanical member to incrementally advance the unit's curved pistons for recursive compression of air within sub-chambers defined therebetween. The compressed air is recursively passed through the transfer port to the sub-chambers of the expansion unit for combustion.

Abstract: A pump device having a vane-type pump has a check valve in a fluid duct which leads from a pressure region to an under-vane region. The check valve blocks in the direction of the pressure region, preventing pressure from escaping from the under-vane region into the pressure region during the start-up of the vane-type pump.

Abstract: A pump has a suction region, a pressure region, and a pressure space which has an outflow region. A rotor is connected to a shaft in which rotor delivery elements are displacably received. The rotor has expelling regions connected to the pressure region by way of a first fluid path. A cold starting device is prestressed into a first functional position to shutoff a second fluid path from the pressure region to the pressure space, and is configured to be displaced counter to the prestress into a second functional position to open the second fluid path. The cold starting device is arranged in its second functional position at least in regions with a relief face which faces away from the pressure region in a relief receptacle. The relief face is loaded during operation of the pump with a pressure being smaller than a system pressure in the outflow region.

Abstract: A rotary device includes a housing having a tubular surface. The surface has an throughpassing axis and first and second ports. A rotor body rotates about the axis and has a plurality of slots extending generally radially from the axis. A vane is mounted in each slot for reciprocation such that the surface can be swept by the vanes as the body rotates. A seal permits fluid to flow into and out of the device substantially only via the first and second ports such that the vanes create chambers which decrease in volume when in communication with the first port and increase in volume when in communication with the second port. The tubular surface is oval in cross-section.

Abstract: A pump device having a vane-type pump has a check valve in a fluid duct which leads from a pressure region to an under-vane region. The check valve blocks in the direction of the pressure region, preventing pressure from escaping from the under-vane region into the pressure region during the start-up of the vane-type pump.

Abstract: A vane pump is used as a fluid pressure supply source and includes a rotor which is driven and rotated, a plurality of slits which are radially formed in the rotor, a plurality of vanes which slidably project from the slits, a cam ring with which tip parts of the vanes slide in contact as the rotor rotates, a pump chamber which is defined between the cam ring and adjacent ones of the vanes, a plurality of discharge ports which introduce working fluid discharged from the pump chamber contracting as the rotor rotates, a discharge passage which causes the working fluid introduced from the discharge ports to join, and a check valve which is opened for a flow of the working fluid discharged from one discharge port to the discharge passage.

Abstract: A rotary engine is described including: (1) a rotor located within a housing, the rotor configured with a plurality of rotor vane slots; (2) a vane separating an interior space between the rotor and the housing into at least a trailing chamber and a leading chamber, where the vane slidingly engages a rotor vane slot; (3) a first passage through the vane, the first passage including a first exit port into the rotationally trailing chamber; and (4) a second exit port to the rotationally trailing chamber, where the first exit port and the second exit port connect to any of: (a) the first passage through the vane and (b) the first passage and a second passage through the vane, respectively. Optionally, one or more seals affixed to the vane and/or the rotor valve the first passage, the second passage, a vane wingtip, and/or a conduit through the rotor.

Abstract: A vane pump of the intravane type for pumping hydraulic fluid, wherein each vane of the pump has two intravanes and that pressurized oil is provided to one or both intravane regions when the vane is in a rise region of the pump. The pump is operated such that the pressurized oil is provided to both undervane regions when the pump is running at low speed but the pressurized oil is provided to only one of the undervane regions when of the pump is running at high speed.

Abstract: Embodiments of rotary vane engines include rotors that rotate about an axis of rotation. The rotors can be moved in directions substantially perpendicular to the axis of rotation to vary expansion and/or compression ratios of the rotary vane engines. The ability to vary the expansion and/or compression ratios can facilitate optimization of the performance of the rotary vane engines as operating conditions vary.

Abstract: A vane pump includes: a rotor with slots; vanes mounted in the slots, and adapted to project from the slots; a cam ring surrounding the rotor; and a plate defining pump chambers in cooperation with the rotor, vanes and cam ring. The plate includes: a suction port; a discharge port; a first back pressure port that receives a suction-side fluid pressure, and hydraulically communicates with a first back pressure chamber corresponding to a first vane positioned in a suction region; and a second back pressure port that hydraulically communicates with a second back pressure chamber corresponding to a second vane whose distal end portion is positioned at a terminal end portion of the suction port. The second back pressure port includes: a first portion arranged to receive a discharge-side fluid pressure; and a throttling portion for restricting a fluid flow between the first portion and second back pressure chamber.

Abstract: A rotary engine is described including: (1) a rotor located within a housing, the rotor configured with a plurality of rotor vane slots; (2) a vane separating an interior space between the rotor and the housing into at least a trailing chamber and a leading chamber, where the vane slidingly engages a rotor vane slot; (3) a first passage through the vane, the first passage including a first exit port into the rotationally trailing chamber; and (4) a second exit port to the rotationally trailing chamber, where the first exit port and the second exit port connect to any of: (a) the first passage through the vane and (b) the first passage and a second passage through the vane, respectively. Optionally, one or more seals affixed to the vane and/or the rotor valve the first passage, the second passage, a vane wingtip, and/or a conduit through the rotor.

Abstract: The spindle of a vane motor is designed to enhance the power, speed and torque by undercutting the spindle adjacent to the vanes on the power stroke side to increase the working area of the vanes and by adding slots intermediate the vane formed in said spindle and each slot has a working face for accepting pressurized air during the power stroke. The slots are located out of coincidence with the rotating axis of the spindle and the vanes include a contoured bottom edge fitted into the slots so as to enhance its ability to be retracted in opposition to centrifugal force created by the rotating cylinder.

Abstract: The invention relates to a compressed air motor comprising a housing and a rotor rotatably mounted therein, the rotor being provided with substantially radial slots and plate-like vanes being mounted in the slots so as to be radially displaceable by the centrifugal force, and variable, all-round air chambers being formed between the housing and the outside of the rotor. The vanes are surrounded on the outside by a rotatable sleeve which is provided with at least one passage for the compressed air.

Abstract: A vane motor is modified to increase the sealing effectiveness of the gap made at the interface of the spindle and cylinder by undercutting the cylinder a predetermined amount and distance so as to increase the effectiveness of the spindle to cylinder gap and to decrease the requirements for lubrication of the vane motor.

Abstract: Within an angular area where each vane of a vane pump having backpressure grooves is moved radially inwardly as the rotor rotates, the outer circumferential edge of the backpressure groove is indented toward the rotational axis of the rotor along a locus drawn by the radial innermost end of each vane so that the radial innermost end of each vane does not protrude radially inwardly beyond a predetermined distance from the indented part of the outer circumferential edge of the backpressure groove.

Abstract: In a variable capacity type pump, in the inner diameter of a cam ring, an inner diameter of a portion forming a middle section between a suction section and a discharge section in a pump chamber is constituted by a negative slope curve in which an end portion of a suction port is set to be a start point, and a complete round curve and a negative slope curve are connected by a high-order curve.

Abstract: The pump has a multi-vane rotor operating within a cam ring to pump oil to a component such as a power steering gear. The pump rotor sandwiched between stationary thrust and pressure plates is supplied with oil from a surrounding fluid chamber through aligned intake ports in the two plates. Fluid chambers formed between the reciprocating vanes of the rotor discharges oil into axially aligned discharge ports of the thrust and pressure plates. The discharge port of the thrust plate is hydraulically connected to the discharge port of the pressure plate . Pressure oil in the discharge port of the pressure plate feeds into a system pressure chamber outboard of the pressure plate. Oil in the system pressure chamber is fed back to a first side chamber of the rotor through at least one simple flow passage in the pressure plate. The first side chamber is formed between inner and outer lands on the rotor.

Abstract: In the back pressure groove structure of a variable displacement vane pump comprising a rotor rotatably contained in a pump housing and having a plurality of vane grooves arranged radially and equidistantly in a circumferential direction, a cam ring is arranged in the pump housing in a movable and displaceable manner, fitted into the pump housing to form a pump chamber with an outer peripheral portion of the rotor and applied with an urging force to provide a maximum volume of the pump chamber. A side plate is contained in the pump housing in a non-rotatable manner, slidably contacting with one sides of the rotor and the cam ring and having back pressure grooves communicating with the vane grooves.

Abstract: An internal combustion engine in combination with a rotary positive displacement fluid machine. The combination having a rotor eccentrically mounted in a casing with a plurality of vanes defining compartments within the casing which vary in volume as the rotor rotates. Each vane is connected to a linkage to cause the vane, during rotation of the rotor, to pivot radially outwardly such that the outermost extremity of each vane is constrained to follow closely the internal wall of the casing. The linkage being constrained to follow at least one track in a member rotatable upon the same axis as the casing. The machine being connected to an air inlet manifold of the engine, and to atmosphere, such that the rotor is driven by the pressure difference between ambient air and air at the inlet manifold. The machine also is operatively connected to an energy using device.

Abstract: A vane pump is composed of a rotor that is rotatably disposed in a cam ring attached to a housing, a plurality of vanes that are slidably disposed in corresponding slits formed in the rotor in which the vane is projected from the slit upon rotation of the rotor, a pair of sidewall members that close both side portions of the cam ring to form a cavity defined by the cam ring and said sidewall members, a plurality of annular backpressure grooves that is depressively formed on contact surfaces of the sidewall members with the rotor in which adjacent two of the backpressure grooves are communicated with each other through a communication passage to introduce discharged pressure into an inside end portion of each of the slits, and depressions that are formed on at least one of the contact surfaces of the sidewall members with the rotor in which the depressions are not contacted with a part of side surface of each of the vanes.

Abstract: A motor/pump (10) comprises a housing (12) defining a cavity (18) between sealed ends (14 and 16). Rotor (24) having a substantially hollow body (26) is supported by the housing (12) for rotation within the cavity (18) about a rotation axis (28) which is parallel to but offset from longitudinal axis (30) of the cavity (18). A plurality of vanes (32) are retained by the rotor (34) for movement radially of the rotation axis (28). ne vanes (32), rotor (24) and housing (12) are juxtaposed so that a substantially sealed chamber is formed between adjacent vanes (32), inner surface (34) of housing (12) and outer circumferential surface (36) of the rotor body (26). First and second ports (20, 22) are formed in the housing (12) and located so as to be disposed in different chambers.

Abstract: The invention concerns an oil-sealed vane-type rotary vacuum pump with a suction chamber (8) housing a rotatably mounted rotor (3) which has an anchoring section (21) and a bearing section (23) with a slot (24) in which two vanes (26) are mounted with a space (28) between them. The rotor bearing (3) comprises the bearing section (23) and a rotor-mounting bore (11). The vacuum pump also has an oil pump (45, 46), which produces a flow of oil through the space (28) between the vanes, and a system for controlling the flow of oil through the space (28), the oil passing through a channel (66) opening out in the rotor-mounting bore (11) and then through radial and longitudinal bores (68, 69) in the bearing section (23) of the rotor.

Abstract: An external combustion engine for driving a power shaft, which includes a rotary combustion chamber having an eccentric rotor and a plurality of telescoping vanes extending from the rotor to the inner walls of the combustion chamber. The vanes divide the combustion chamber into individual compression and combustion cells. As the rotor rotates the cells become progressively smaller in volume compressing a flammable mixture of fuel and air. At the point of maximum compression the mixture is ignited. The expanding gasses are permitted to escape into an adjacent expansion chamber in which rides a reciprocating piston, driving the piston and producing work.

Abstract: A pump, particularly a vane or roller pump, with at least two pump segments, each having a suction region and a pressure region, with a first fluid path leading from the pressure side to a consumer, and with at least one hydraulic resistance element, which is arranged in the first fluid path to the consumer, is proposed. The pump is characterized in that the hydraulic resistance element is arranged in a second fluid path connecting the pressure regions of the at least two pump segments.

Abstract: An oil pump which delivers an operating oil to a power steering mechanism of vehicle is designed to reduce the power which is wasted during a high speed operation. A subpump of a reduced capacity having a number of revolutions which varies with a vehicle speed is provided, in addition to a vane pump which delivers an operating oil to the power steering mechanism. A discharged oil from the subpump is delivered to act upon the rear surface of the vanes to enable a pumping action of the vane pump when operating at low speeds while the delivery of the discharged oil to the rear surface of the vanes is interrupted to cease the pumping action of the vane pump, and is delivered to the power steering mechanism when operating at higher speeds.

Abstract: A device to separate muddy water from slurry which is being drained away and a means to use said muddy water to both seal and lubricate a gap between the guide channels and the vanes of the drainage pump, thereby securing the efficient long-term functioning of the pump. The invention presupposes the use of a vane type rotary drainage pump connected to a separation means which is set up to remove muddy water from the slurry discharged from the discharge port. A pressure chamber is incorporated into said rotor and connection with the inner ends of each of said guide channels. The muddy water separated out by the separation means is fed back into said pressure chamber.

Abstract: In a rotary vane hermetic compressor an improved loading structure is provided for the vanes. A pressure reducing means incorporated into the compressor rotor reduces the frictional loading of the vane tips against the compressor walls. A passageway vents fluid at suction pressure into a cavity in the rotor containing the inner tips of the sliding vanes.

Abstract: A rotary fluid machine including a rotor provided with a plurality of lobes, a ring surrounding the rotor and with the lobes defining a plurality of chambers, a housing surrounding the ring and provided with a plurality of depressions which together with the ring define a plurality of chambers, a plurality of sealing vanes extending through the ring and engaging with the outer surface of the rotor and an inner surface of the housing, and fluid passages provided in the ring adjacent the sealing vanes with alternate fluid passages connected together.

Abstract: A rotary hydraulic vane pump includes a rotor mounted within a housing, with a plurality of vanes individually slidably disposed in corresponding slots in the rotor periphery. A cam ring surrounds the rotor within the housing and has a radially inwardly facing vane track defining as least one arcuate fuel pressure cavity between the rotor and the cam ring. A fuel inlet in the housing includes a primary inlet port opening into the cavity at the leading circumferential edge of the cavity with respect to the direction of rotation of the rotor within the housing. A pump outlet includes an outlet port that opens into the cavity adjacent to the trailing circumferential edge of the cavity. A secondary inlet port opens into the cavity circumferentially between the primary inlet port and the outlet port, and is directly connected to the pump outlet port such that fluid, at outlet pressure is available at the secondary inlet port.

Abstract: A rotary machine includes a stationary housing having a rotor chamber and a rotor rotatably mounted in the rotor chamber, the inner peripheral surface of the rotor chamber having a central axis which is eccentrically disposed relative to the axis of rotation of the rotor. The housing has generally planar inner end walls having a cylindrical opening through which the rotor shaft extends. A plurality of vanes are slidably mounted in vane slots in the rotor and operable to define variable volume chambers as the rotor rotates and the vanes move generally radially in and out of the vane slots. Back pressure regulating grooves are disposed in the end walls of the housing, the grooves having a central axis coincident with the axis of rotation of the rotor, the grooves being juxtaposed to the vane slots and communicating with the vane slots for regulating the internal back pressure on the vanes in the vane slots.

Abstract: A roller vane motor as described, the motor having a stator with a generally cylindrical chamber provided with fluid inlet and outlet means. A rotor is provided in the chamber to be rotatable therein, the rotor having a slot to receive a roller which forms a seal between the rotor and said chamber. The roller is urged into the sealing condition by means of drive fluid flowing behind the roller. A twin-roller version is also described as is a motor assembly made up of a number of vane motors arranged in line.

Abstract: There is provided a positive displacement hydraulic rotator unit capable of operating in either direction of rotation. The rotator unit comprises a housing defining a substantially cylindrical internal chamber centered about a first central axis, and a rotor within the chamber. The rotor is rotatably mounted about a second axis, parallel to the first axis but radially displaced. There are intake and exhaust openings into the chamber, angularly displaced about and through the cylindrical surface. The rotor comprises a substantially rigid core having at least three radially extending, centrally interconnected channels for slidably holding rigid elongated blades. The blades are in turn interconnected by a rigid member so that the rigid member and the blades rotate and move radially as a single unit.

Abstract: In a vane pump, a pump housing contains a cam ring having an internal cam surface, in which a rotor carrying eight vanes is rotatable by a drive shaft. A pair of side plates positioned in the receiving bore in contact engagement with the opposite end surface of the cam ring, the internal cam surface and the rotor define a pump chamber. Each of the side plates is formed at its inside surface contacting the cam ring with a pair of intake ports, a pair of exhaust ports and a vane back pressure groove. This groove is always filled with pressurized fluid supplied from the exhaust ports such that the pressurized fluid is directed into vane support slits formed in the rotor.

Abstract: Front and rear radial roller bearings are provided in front and rear side blocks of the pump housing. A partition wall member is secured to an end face of the rear side block remote from the rotor to define a sealing chamber therebetween. The sealing chamber communicates with a back pressure chamber in the rotor through the rear radial roller bearing. A shaft-seal chamber defined between the front head and the front side block communicates with the back pressure chamber through the front radial roller bearing. The pump housing is formed therein with passage means communicating the discharge pressure chamber with at least one of the sealing chamber and the shaft-seal chamber.

Abstract: A partition member is fitted within a casing at a location between an end wall of a pump housing accommodated within the casing and an opposed inner end face of the casing and cooperates with the one end wall to define a suction chamber therebetween. A first discharge pressure chamber is defined between an outer peripheral surface of the pump housing and an inner peripheral surface of the casing, and a second discharge pressure chamber between the above opposed inner end face of the casing and the partition member, respectively. The two discharge pressure chambers communicate with each other via passages formed through the partition member and the above end wall of the pump housing. A suction port and a discharge port are formed in the casing at the same axial side thereof, the former opening in the suction chamber in a substantially direct manner.

Abstract: The invention pertains to a two stage vacuum pump particularly suitable for servicing refrigeration systems wherein a pair of electrically driven rotors support outwardly movable vanes engaging the cylindrical circumference of pumping chambers in which the rotors are mounted. The efficient relationship of components produces a high capacity pump in a concise configuration, lateral sides of the rotors are recessed to produce rapid seating of the vanes, reduce hydraulic end loading of the second stage rotor and minimize friction. The vanes are offset from the associated rotor axis to allow greater displacement for a given chamber bore and rotor size, and advantageous frictional forces are produced to augment sealing between the vane tips and chamber surface. Further, the vane tips are shaped to optimize compression and reduce gas re-expansion, and the rotors of the two stages are rotationally phased to improve capacity and pumping characteristics.

Abstract: A vane compressor is provided which has a rotor formed therein with a plurality of axial slits opening in its outer peripheral surface in a circumferentially spaced arrangement, and in each of which a vane is received, and a plurality of cavities located between adjacent ones of the axial slits. The rotor is formed of at least two rotor elements integrally joined in an axial alignment, each rotor element being formed of a sintered alloy compact. The rotor elements are brazed along their end faces abutting against each other.

Abstract: A sliding-vane type oil free rotary compressor comprising a rotary sleeve rotatably mounted in a center housing, a rotor eccentrically contained in the rotary sleeve, and a plurality of vanes movably fitted in the rotor. The rotary sleeve and the center housing are arranged to define an annular pressure chamber between their inner and outer surfaces. A part of the compressed fluid is introduced to at least a high-pressure passage and then injected therefrom to the pressure chamber through a throttle to produce dynamic pressure for floatingly supporting the rotary sleeve.

Abstract: Hydrostatic motor with axially slidable vanes.The invention relates to a hydrostatic motor having vanes sliding axially in rotor lodgings against a continuous stator bottom surface with recesses therein. The motor comprises an intercommunication circuit between the vanes behind the latter, said circuit permitting integral transmission of pressures between vanes depending on their variable position against said recessed stator bottom surface, the vanes retracted in their lodging acting by increase of pressure in said intercommunication circuit upon the vanes projecting out of their lodging.

Abstract: A vane compressor is provided which has a rotor formed therein with a plurality of axial slits opening in its outer peripheral surface in a circumferentially spaced arrangement, and in each of which a vane is received, and a plurality of cavities located between adjacent ones of the axial slits. The rotor is formed of at least two rotor elements integrally joined in an axial alignment, each rotor element being formed of a sintered alloy compact. The rotor elements are brazed along their end faces abutting against each other.

Abstract: A vane compressor is provided which includes a rotor which has an internal space formed at its central portion and communicating with a plurality of vane-inserted slits formed in its outer peripheral surface, and first and second axial through holes extending from the internal space to its opposite end surfaces. The drive shaft extends through an end wall member of the pump housing and has its end portion rigidly fitted in the first axial through hole of the rotor. The second axial through hole of the rotor receives a support shaft projecting from the other or opposite end wall member of the pump housing. Thus, the rotor is radially supported at its one end by the drive shaft and at its other end by the support shaft, respectively.

Abstract: A rotary compressor of the sliding vane type which is constructed to prevent seizure during high speed operation, with increased volume efficiency through reduction of leakage of refrigerant, and simultaneous improvements in refrigeration cycle efficiency by the prevention of entry of oil into the refrigeration cycle.

Abstract: A balanced vane type hydraulic pump has a thrust plate and a pressure plate which cooperate with a cam ring, rotor and vanes to provide a plurality of pump chambers. During pump operation, fluid trapped under the vanes flows from under the vanes at the discharge port, as the vane recedes, to under the vanes at the inlet port to assist vane extension and improve pump priming. The undervane fluid passes through grooves in both plates with the groove in the pressure plate being in communication with the discharge flow of the pump. The grooves incorporate restrictions to the undervane fluid flow between the discharge and inlet positions of the vanes with the restriction in the thrust plate permitting more fluid flow than the restriction in the pressure plate to ensure that most of the fluid will pass through the rotor under the vanes in the inlet position to assist in vane extension.

Abstract: A rotor (18) is disposed in a bore (14) of a cylinder (13) and carries vanes (33), (34), (36), (37) in radial slots (28), (29), (31), (32), the vanes (33), (34),(36), (37) being urged into engagement with the wall of the bore (14) by oil pressure applied to inner ends of the vanes (33), (34), (36), (37). The cylinder (13), rotor (18) and vanes (33), (34), (36), (37) are configured to displace refrigerant fluid or the like through the bore (14) from an inlet (19), (21) to an outlet (22), (23) upon rotation of the rotor (18). The trailing outer edges (28a') of the slots (28), (29), (31), (32) are chamfered, thus reducing frictional resistance between the vanes (33), ( 34), (36), (37) and slots (28), (29), (31), (32) to radial movement and producing a reservoir (28c') for oil forced through clearances between the slots (28), (29), (31), (32) and vanes (33), (34), (36), (37).

Abstract: A vane compressor includes a hollow stator, and a rotor which is received in the stator for rotation about an axis. The rotor is provided with a plurality of throughgoing passages which extend radially and outwardly relative to the axis. Each passage receives a vane which has an outer end face directed towards an inner circumference of the stator and an inner end face directed away from the inner circumference of the stator. The vanes are shiftable radially in the respective passages relative to the axis. A pressure medium is supplied under a first pressure to the inner end faces of the vanes to urge the same radially outwardly for engagement of the outer end faces with the inner circumference of the stator. When the rotor is rotated, the vanes are subjected to an additional second pressure resulting from centrifugal force. The second pressure additionally urges the vanes against the inner circumference of the stator.

Abstract: A vane compressor includes a hollow stator, and a rotor which is received in the stator for rotation about an axis. The rotor is provided with a plurality of throughgoing passages which extend radially and outwardly relative to the axis. Each passage receives a vane which has an outer end face directed towards an inner circumference of the stator and an inner end face directed away from the inner circumference of the stator. The vanes are shiftable radially in the respective passages relative to the axis. A pressure medium is supplied under a first pressure to the inner end faces of the vanes to urge the same radially outwardly for engagement of the outer end faces with the inner circumference of the stator. When the rotor is rotated, the vanes are subjected to an additional second pressure resulting from centrifugal force. The second pressure additionally urges the vanes against the inner circumference of the stator.