Abstract: A hydraulic device can include two or more rings, a rotor having a plurality of vanes, and an adjuster. The two or more rings can be rotatably mounted within the hydraulic device and arranged adjacent one another configured for relative rotation with respect to one another. The rotor can be disposed for rotation about an axis within the two or more rings and can have a plurality of circumferentially spaced slots, each slot having at least one of the plurality of vanes located therein. The plurality of vanes can be configured to be movable between a retracted position and an extended position where the plurality of vanes work a hydraulic fluid introduced adjacent to the rotor. The adjuster can be configured to translate linearly to rotatably position the two or more rings relative to one another to increase or decrease a displacement of the hydraulic fluid between the rotor and the two or more rings.

Abstract: The invention refers to hydraulic rotation transmissions and can be used in power transmissions and transmissions where the stepless ratio variation is essential. It can also be used as stepless speed transmission for vehicles (FIG. 1). Getting any transmission ratio with higher performance factor is achieved by applying in the hydraulic transmission new scheme, including motionless and movable bodies containing two coupled rotors, composing of camshafts with pistons and separated by motionless wall. Transmission ratio varies from 0 to maximal value displacing the movable body in axial direction by means of overhanging control arm.

Abstract: A variable displacement vane pump includes: a rotor to be rotatively driven; a plurality of vanes slidably housed in the rotor; a cam ring allowed of eccentric with respect to a center of the rotor, the cam ring having an inner circumferential cam surface in sliding contact with a distal end portion of the vane; a pump chamber defined by the adjacent vanes, the rotor, and the cam ring; a suction port to guide hydraulic fluid to be suctioned to the pump chamber; and a discharge port to guide hydraulic fluid to be discharged from the pump chamber. An outer circumference of an opening portion of the suction port is formed so as to be positioned along the inner circumferential cam surface of the cam ring or at an outside of the inner circumferential cam surface regardless of eccentricity of the cam ring with respect to the rotor.

Abstract: An expander-integrated compressor (100) includes: a compression mechanism (2) for compressing a working fluid; an expansion mechanism (3) for expanding a working fluid; and a shaft (5) that couples the compression mechanism (2) and the expansion mechanism (3). The expansion mechanism (3) includes a variable vane mechanism (60). The variable vane mechanism (60) controls the movement of a first vane (48) so that the ratio of a period P2 to a period P1 (P2/P1) can be adjusted, where P1 denotes the period during which the first vane (48) is in contact with a first piston (46) in the course of one rotation of the shaft (5), and P2 denotes the period during which the first vane (48) is spaced from the first piston (46) in the course of one rotation of the shaft (5).

Abstract: A scroll pump facilitates the installation of a new tip seal between an axial end of the scroll blade of one of inner stationary and orbiting plate scrolls of the pump and the plate of the other of the inner stationary plate and orbiting plate scrolls. To this end, the orbiting plate scroll has a central portion and an outer peripheral portion extending around and seated on the central portion. The outer peripheral portion of the orbiting plate scroll is keyed to and/or fastened to the central portion such that the outer peripheral portion is not rotatable relative to the central portion and yet is axially removable from the central portion. The tip seal can be readily accessed and replaced by removing the outer peripheral portion of the orbiting scroll plate from the central portion.

Abstract: A compressor is provided and may include a shell assembly defining a suction pressure region and a discharge pressure region. A first scroll member may include a first discharge port and a first modulation port. A second scroll member may include a first variable volume ratio port. A capacity modulation valve assembly may be in fluid communication with the first modulation port and may be displaceable between open and closed positions to selectively provide communication between a first intermediate compression pocket and the suction pressure region via the first modulation port. A variable volume ratio valve assembly may be in fluid communication with the first variable volume ratio port. The variable volume ratio valve assembly may be displaceable between open and closed positions to selectively provide communication between a second intermediate compression pocket and the discharge pressure region via the first variable volume ratio port.

Abstract: A variable displacement vane pump includes: a plate side high pressure introduction groove formed in the pressure plate or in the cam ring, formed so that an entire is positioned within a radial width of the cam ring, and a part is positioned in a circumferential region between the suction port and the discharge port, and arranged to receive a hydraulic pressure larger than a suction pressure; and a housing side high pressure introduction groove formed in the second housing or in the cam ring, formed so that an entire is positioned within the radial width of the cam ring, that a radial center is positioned radially outside the radial center of the plate side high pressure introduction groove, and that a part is overlapped with the plate side high pressure introduction groove in the circumferential direction, and arranged to receive the hydraulic pressure larger than the suction pressure.

Abstract: A rotary compressor is provided. The rotary compressor may include a plurality of cylinders each having a suction port formed such that an intersection of a center line of the suction port and a center line of a vane slot is positioned at a predetermined interval closer to the vane slot than to an intersection between a center of an inner diameter of the cylinder and the center line of the vane slot. A proximal end of the suction port may be formed in the vicinity of the vane slot so as to advance a compression start angle of a compression space and reduce a dead volume between the vane slot and the suction port, thus improving compressor performance.

Abstract: A capacity varying type rotary compressor and a refrigeration system having the same are provided. The capacity varying type rotary compressor includes a casing that contains a certain amount of oil and maintains a discharge pressure state; a motor installed in the casing that generates a driving force; one or more cylinder assembly fixed in the casing, having a compression space that compresses a refrigerant by a rolling piston that performs an orbit motion and a vane that performs a linear motion by contacting the rolling piston, and having a vane pressure chamber formed at a rear side of the vane that implements a normal driving as the vane contacts the rolling piston or a saving driving as the vane is separated from the rolling piston; and a mode switching device that selectively supplies a suction pressure or a discharge pressure to the vane pressure chamber of the cylinder assembly according to a driving mode.

Abstract: A vane pump comprises: a drive shaft that passes through the pump frame; a rotor coupled to the drive shaft that has multiple vanes and rotates within the pump frame in an axial direction about an axis of rotation with an outer rotor surface that has a radius that extends from the axis of rotation; a cam ring within the pump frame that circumscribes the rotor and vanes with a cam ring inner surface; multiple radial tilting pad bearings that support the cam ring; a bearing support ring coupled to the pump frame that generally circumscribes the cam ring and mounts the radial tilting pad bearings; side plates that radially extend from the drive shaft to the pump frame to enclose the rotor and the cam ring with at least one side plate having an inlet port and an outlet port; and means for initiating rotation of the cam ring from rest.

Abstract: An example vane pump comprises a shaft driving a rotor. The rotor has a plurality of vane grooves, with a vane received in each of the plurality of vane grooves, and an under vane chamber for communicating a pressurized fluid into the grooves to bias the vanes radially outwardly of the rotor. A cam ring is positioned radially outwardly of the rotor. The cam ring is free to rotate with the rotor through friction from the vanes as the rotor rotates. An inlet delivers a fluid to be pumped into an inlet chamber, and an outlet receives the fluid pumped by the vane pump. An outlet for the fluid biasing the vanes communicates to a main outlet through a passage including a valve to increase the pressure of the fluid in the grooves.

Abstract: A blade moves backward/forward to enter four different states, namely a first state in which the tip thereof is in sliding contact with the internal peripheral surface of an external side cylinder part, a second state in which the tip is positioned in the cutaway portion of a ring-shaped piston to thereby place only an external side cylinder chamber at rest, a third state in which the tip is positioned in the cutaway portion of an internal side cylinder part to thereby place only the external side cylinder chamber and an intermediate cylinder chamber at rest, and a whole rest state in which the tip is positioned in a blade groove to thereby place all of the cylinder chambers at rest.

Abstract: A pump is formed by a housing (10) having an inlet (11) for connection to a source of fluid and an outlet (12) for pumped fluid. A rotor (15) is rotatable within the housing and the inlet (11) and the outlet (12) are spaced apart around the path of the rotor (15) in the housing. The rotor (15) has surfaces (16a, 16b, 16c, 16d) that form, with the housing (10), closed chambers (18a, 18b, 18c, 18d) which travel around the housing (10) to convey fluid from the inlet (11) to the outlet (12). The housing (10) carries a seal (14) that is located between the inlet (11) and the outlet (12) in the direction of travel of the rotor (15). The seal (14) co-operates with the rotor surfaces (16a, 16b, 16c, 16d) as the surfaces (16a, 16b, 16c, 16d) pass between the outlet (12) and the inlet (11) to prevent the formation of a chamber during said passage and so prevent fluid flow from the outlet (12) to the inlet (11). Such a pump is easily and cheaply produced and is particularly useful in medical applications.

Abstract: The disclosed apparatus includes a stator and a rotor disposed for rotation within the stator. An inner wall of the stator defines one or more collider chambers. Rotation of the rotor causes movement of fluid disposed between the rotor and stator and establishes a rotational flow pattern within the collider chambers. The fluid movement induced by the rotor increases the temperature, density, and pressure of the fluid in the collider chamber.

Abstract: A variable displacement vane pump has a pump body, a driving shaft rotatably supported by the pump body, a rotor rotatably driven by the driving shaft, a plurality of vanes radially extendably installed in respective slots arranged in a circumferential direction in the rotor, a cam ring rockably provided inside the pump body and forming a plurality of pump chambers at an inner circumference side of the cam ring in cooperation with the rotor and the vanes. At an outer circumference side of the cam ring inside the pump body, a seal member is provided and defines a first hydraulic pressure chamber located at a side where a pump discharge amount increases and a second hydraulic pressure chamber located at a side where the pump discharge amount decreases. Then, a control valve controls only a pressure of the second hydraulic pressure chamber.

Abstract: The present invention may be used in pumps and hydraulic engines and increases the functional capacities of rotary machines. This invention relates to a rotary machine comprising a body in which an adjustment member is mounted so as to be capable of displacement along the rotation axis. A plurality of systems, that define the axial and mutual disposition of sliders, are mounted so as to be capable of changing their position relative to the rotor and the body, and are cinematically connected to the adjustment member. The sliders are mounted so as to be capable of changing their position upon displacement of the adjustment member.

Abstract: A fully variable output hydraulic pump includes a main casing having a fluid pumping chamber extending therethrough, fluid input ports and fluid output ports. The fluid pumping chamber is shaped to receive a pair of cylindrically shaped gears inserted axially therethrough. A first rotatable gear and second rotatable gear are insertable through the pumping chamber. The first and second gears are rotatably supported by respective means which are axially translatable relative to each other. A means for sealing the area between the gears and the main casing effectively creates a sealed fluid pumping chamber. By translating one of said means for rotatably supporting the gears, the effective fluid pumping volume within the fluid pumping chamber may be altered to provide a fully variable output hydraulic pump.

Abstract: A vane-type motor is disclosed including a rotor disposed in a housing having a plurality of cam rings surrounding the rotor, which cam rings are displaceable relative to one another in the circumferential direction. Vanes associated with the cam rings subdivide a work chamber provided between the rotor and the cam rings into work cells and side plates laterally confine the work chamber. An inlet channel supplies pressure fluid to the work chamber and a discharge channel provides for discharge of the pressure fluid from the work chamber. Control channels are provided to preclude pressure impacts and noises with the cam ring displaced. The control channels terminate in the work chamber and connect the work chamber to the inlet channel. The rotor forms a control element for the control channels.

Abstract: An adjustable hydrostatic drive, particularly for the auxiliary units of motor vehicle internal combustion engines, has a pump/motor unit (2, 3) with the pump and motor arranged radially one within the other in a common housing (1) with an eccentric control ring (6) between them. The pump and motor are hydraulically connected together and have delivery volumes adjustable in opposite senses. The speed variation mechanism includes a shaft (14) driving the pump/motor unit (2, 3) which passes through the side plates (17) of the housing and rotates with one projecting end (20) in a bushing (22) having an eccentric, sickle-shaped shoulder (21) that engages in a through bore (23) in a front face (30) of the control ring (6) and an outer bushing (24) that coaxially surrounds the shaft end bushing and includes a nose (25) which projects into a radial groove (26) in the control ring (6).

Abstract: A variable output gerotor oil pump of the kind having a common rotor with n teeth meshed with two axially juxtaposed internally lobed annuli with n+1 teeth has the annuli individually located in eccentrics formed with gear teeth to be turned in opposite directions by a gear drive. The teeth are straight cut, not bevel, and the drive includes an intermediate pinion so that a single shaft turns the eccentrics in opposite directions.

Abstract: A vane motor is disclosed in which the volumetric displacement, torque, or speed are continuously adjustable. The vane motor includes a housing having a rotor and cam ring disposed axially around the rotor. The rotor includes vanes in radial slots which divide the motor between the rotor and cam rings. One cam ring is rotatable relative to the other so as to change volumetric displacement.

Abstract: A variable displacement vane pump includes a rotor (10) rotatably mounted in a casing (32). The casing (32) has a pair of relatively rotatable complementary cams (18,20). Each cam (18,20) has a surface shaped to provide an annular curvilinear track. The pump also has a first (14) and second (16) plurality of vanes slidably mounted upon the rotor (10). Each of the vanes (14,16) is sized and positioned to engage a corresponding cam (18,20). These vanes (14,16) are constrained in a radial direction by the cams (18,20) as the rotor (10) rotates. The vanes of the first (14) plurality engage one (18) of the cams, the other one (20) of the cams being engaged by the vanes of the second plurality (16).

Abstract: A variable displacement vane pump has a ported casing (10), a rotor (28) and a first (32a) and second (32b) plurality of vanes. The ported casing (10) has a pair of relatively rotatable, complementary cams (18, 20). Each cam has a surface shaped to provide a curvilinear annular track (18a, 20a). The rotor (28) is rotatably mounted in the casing (10). The vanes (32a, 32b) are slidably mounted upon the rotor (28). Each of the vanes (32a, 32b) are sized and positioned to engage a corresponding one of the pair of cams (18, 20). The vanes of the first plurality (32a) of vanes engage one of the cams (18), the other cam (20) being engaged by the vanes of the second pluarlity (32b). Thus constructed, the vanes (32a, 32b) can move in pairs in a closed path within the casing (10). The vanes (32 a, 32b) of each pair can ride on different ones of the cams (18, 20). By rotating the cams (18, 20) with respect to each other, the phasing of the vanes (32a, 32b) in each pair can be altered.

Abstract: A variable displacement vane pump is provided in which a pair of rings having oval-shaped inner contours are rotatably mounted in side-by-side relationship. The rings are adapted for relative rotation to each other from a first position wherein the inner contours are in register with each other and a moved position wherein the inner contours are out-of-register, and means are provided for effecting the relative rotation, which include a gear system operatively connected to the rings. A rotor member is mounted for rotation within the rings and is formed with a plurality of circumferentially spaced recesses which extend the entire axial length of the rotor. Each of the recesses carries a pair of vanes in abutting relationship. The vanes are mounted for radial movement in the recesses and are adapted for slidable contact with the inner contours of the rings. The vanes form two side-by-side rows of vanes with each row in tracking relationship with the inner contours of the rings.

Abstract: In a sliding vane machine a work can be accomplished by a pressure fluid rotating a rotor provided with a plurality of sliding vanes, which function as turbine blades, whereby the work is taken out as a rotational motion at the rotor shaft. If the machine is designed as a pump the shaft is rotated and the vanes act as impeller blades.In both cases it is desirous if the machine can adapt its work in response to varying loads.In accordance with the invention this is achieved by providing the machine with pressure plates controlling the effective working area of said vanes, the pressure plates thereby being adjusted by a fluid pressure which by means of a pressure actuated valve can be varied the pressure-actuated valve itself being controlled by the fluid pressure in a conduit supplying the pressure fluid to the machine.

Abstract: A rotary piston engine comprising a stator and a rotor including piston slides in the rotor, and working chambers between the rotor and the stator wherein movable parts are provided in the stator for adjusting the volume of the working chambers.

Abstract: A pump is formed by a housing (10) having an inlet (11) for connection to a source of fluid and an outlet (12) for pumped fluid. A rotor (15) is rotatable within the housing and the inlet (11) and the outlet (12) are spaced apart around the path of the rotor (15) in the housing. The rotor (15) has surfaces (16a, 16b, 16c, 16d) that form, with the housing (10), closed chambers (18a, 18b, 18c, 18d) which travel around the housing (10) to convey fluid from the inlet (11) to the outlet (12). The housing (10) carries a seal (14) that is located between the inlet (11) and the outlet (12) in the direction of travel of the rotor (15). The seal (14) co-operates with the rotor surfaces (16a, 16b, 16c, 16d) as the surfaces (16a, 16b, 16c, 16d) pass between the outlet (12) and the inlet (11) to prevent the formation of a chamber during said passage and so prevent fluid flow from the outlet (12) to the inlet (11). Such a pump is easily and cheaply produced and is particularly useful in medical applications.