Abstract: A feed box for a decanter centrifuge has a housing with a hollow interior, the housing having a top with an inlet therethrough, a bottom, sides, and opposing open ends, wherein the inlet and the open ends are in fluid communication with the hollow interior. A liner shaped complementary to the hollow interior of the housing, has a top, a bottom, sides, opposing ends, an opening through the top of the liner below the inlet, and a channel through the liner between the opposing ends in fluid communication with the inlet.

Abstract: Embodiments of the invention are directed toward a novel pressurized vapor cycle for distilling liquids. In some embodiments of the invention, a liquid purification system is revealed, including the elements of an input for receiving untreated liquid, a vaporizer coupled to the input for transforming the liquid to vapor, a head chamber for collecting the vapor, a vapor pump with an internal drive shaft and an eccentric rotor with a rotatable housing for compressing vapor, and a condenser in communication with the vapor pump for transforming the compressed vapor into a distilled product. Other embodiments of the invention are directed toward heat management, and other process enhancements for making the system especially efficient.

Abstract: The present invention relates to a vane heat engine and in particular to a vane heat engine efficiently utilizing potential energy and having an adjustable expansion chamber wall so that the volume of the expansion chamber is adjustable. The engine has a housing with an inlet and an outlet. A rotor with a plurality of vanes is provided to rotate within the housing. An adjuster is provided for adjusting the location of an expansion chamber wall. The position or location of the expansion chamber wall determines the volume within a plurality of compartments bound by the rotor, the expansion chamber wall and two of the plurality of vanes. The expansion wall can be made of a plurality of members, whereby the expansion wall is flexible along its longitudinal dimension yet strong perpendicular to the longitudinal dimension.

Abstract: A hydrostatic axial piston machine of swashplate type of construction includes a rotatable cylinder drum that has a plurality of cylinder bores, which are arranged approximately axially, formed in the cylinder drum. A piston is inserted into each cylinder bore at one side. At the other side, each cylinder bore is freely connected via a respective passage opening to a face surface of the cylinder drum. The face surface bears against a static distributor disk. The respective mouths arranged at the face surface, or the passage openings as a whole, have a cross section that has two or four widenings with rounded corners so as to enlarge the cross-sectional area in relation to the circular shape.

Abstract: The invention relates to a filling machine for producing sausages and a method for monitoring the state of fouling of a collection container and/or a channel which is in communication with the collection container of such a filling machine, where the filling machine comprises a vane cell pump for delivering pasty mass, a vacuum pump for generating negative pressure of the vane cell pump, where the vane cell pump is via the collection container for the pasty mass that is dragged along in communication with the vacuum pump. The filling machine further comprises an inspection opening that is via a channel in communication with the collection container for inspecting the channel and/or the collection container.

Abstract: The invention relates to a filling machine and a method for filling a pasty mass, in particular for the production of sausages, with a vane cell pump for conveying the paste mass, a vacuum pump for generating negative pressure in the vane cell pump, where the housing of the vane cell pump comprises an evacuation opening via which the vacuum pump can evacuate the vane cells. The evacuation opening is formed in the cover of the vane cell pump.

Abstract: Rotary expansible chamber (REC) devices having one or more working-fluid ports that are adjustable, for example, in size or location. In some embodiments, the variable port mechanisms can be used to control any one or more of a plurality of operating parameters of a REC device independently of one or more others of the operating parameters. In some embodiments, the REC devices can have a plurality of fluid volumes that change in size during rotation of the REC device, and that transition to a zero volume condition during the rotation of the REC device. Systems are also provided that can include one or more REC devices. Methods for controlling various aspects of REC devices, including methods of controlling one or more operating parameters, are also provided.

Abstract: The invention relates to a vane cell pump, having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in this rotor in radially displaceable manner, and an outer ring surrounding the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing or in a setting ring that can be moved in the pump housing along predetermined paths.

Abstract: A sliding vane rotary expander is used in a waste heat recovery system for a power plant. One example rotary expander has multiple stages with the vane assemblies disposed in bearing supported rings. Another example rotary expander has multiple stages with the vane assemblies disposed in an elliptical cavity. A balance valve equalizes the flow within the stages. Single stage rotary expanders may also be used.

Abstract: Vane pump mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring is supported by a journal bearing. A relatively low sliding velocity is imposed between the cam ring and the vanes. This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.

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 pumping system having a pump, such as a variable-displacement vane pump or a gear pump. The pump in turn has hydraulic pressure-control dissipating devices for imparting to the oil in a first control chamber a pressure lower than the pressure of a second chamber. The system is characterized in that the first control chamber of the pump has a channel connecting the first control chamber to an oil inlet. And the channel has an opening/closing device controlled selectively by an engine operating parameter, such as oil temperature.

Abstract: In a variable capacity vane pump, a space between adjacent vanes is 1 pitch. A line that connects a half-pitch-advanced position from an end edge of an inlet port or from an end edge of an outlet port and a driving shaft center in a no-load state is termed a port reference line. A line that connects a center of a cam ring inner circumference side and the driving shaft center when an eccentricity amount of a cam ring is a maximum is termed a high pressure cam profile reference line. A line that connects the center of the cam ring inner circumference side and the driving shaft center at a low pressure when the eccentricity amount of the cam ring is a minimum is termed a low pressure cam profile reference line. The three reference lines; the port reference line, the high pressure cam profile reference line and the low pressure cam profile reference line, is set to be substantially parallel to each other.

Abstract: The present invention is a variable displacement pump system for delivering precisely controlled oil flow and pressure, including a variable displacement pump having an inlet passage, an outlet passage, a first chamber and a second chamber for controlling the displacement of the variable displacement pump. The present invention also includes a fluid control device for receiving fluid from the outlet passage, and selectively delivering fluid to the second chamber. Fluid is delivered from the inlet passage to the outlet passage from the variable displacement pump, and fluid is also delivered from the outlet passage to the first chamber and the fluid control device. When fluid pressure is greater in the first chamber relative to the second chamber, the displacement of the variable displacement pump will decrease, and when fluid pressure is greater in the second chamber relative to the first chamber, the displacement of the variable displacement pump will increase.

Abstract: A variable-displacement oil pump wherein between a projection of a mobile ring and a corresponding driving chamber and between a protrusion (again of the mobile ring) and a corresponding guiding seat, respectively, there are placed corresponding devices adapted to decrease the effects of the friction between the projections on the mobile ring and the corresponding seats obtained on a main body of the pump itself.

Abstract: A pump having a housing with an actuator member positioned inside for controlling the flow generated by the pump. A first decrease port is connected to the housing and has a surface area in operable contact with the actuator member. A second decrease port is connected to the housing and has a surface area that is operable contact with the actuator member. A valve is connected to the second decrease port for controlling the flow of fluid to the second decrease port. A suction passage is connected to the housing and drawings fluid to the housing using the actuator member. A discharge passage is connected to the housing so that fluid providing an exit for fluid that has been pressurized by the actuator member.

Abstract: The invention relates to a vane cell pump, having a rotor mounted in a pump housing and driven by a shaft, multiple vane plates mounted in this rotor in radially displaceable manner, and an outer ring surrounding the rotor and the vane plates, whereby this ring is disposed either directly in the pump housing or in a setting ring that can be moved in the pump housing along predetermined paths.

Abstract: A variable displacement vane pump includes a first and a second fluid pressure chamber (31,32) where the cam ring (4) is made eccentric to the rotor (2) by a pressure difference between the first and the second fluid pressure chamber (31,32), a control valve (21) for controlling a pressure of the first and the second fluid pressure chamber (31,32) so that an eccentric amount of the cam ring (4) is reduced to be small with an increase in a rotation speed of the rotor (2), a pressure applying section (36) for applying a pressure to the cam ring (4) in a direction of increasing the eccentric amount all the time, and a cam ring movement restricting portion (12) for defining a minimum eccentric amount of the cam ring (4) by restricting the movement of the cam ring (4) in a direction of decreasing the eccentric amount.

Abstract: A pump including a pressure plate having two inlets and outlets, wherein each inlet has an auxiliary intake port in fluid communication with the inlet, and each outlet has an auxiliary discharge port in fluid communication with the outlet, and a cam/rotor assembly attached to the pressure plate. The cam/rotor assembly includes a rotatable cam having an opening, a rotor within the cam opening, the rotor having multiple radial slots, and multiple vanes that move within the slots, wherein a pumping chamber is defined by a space between rotor and cam. Rotor rotation within the cam causes the vanes to extend and retract within the pumping chamber. The movement of the vanes discharges into the outlets and auxiliary discharge ports a fluid drawn into the pumping chamber via inlets and auxiliary intake ports. The auxiliary inlet and auxiliary discharge ports reduce pressure pulsations in a variable displacement dual-lobe vane pump.

Abstract: A controlled-clearance sealing compressor device that provides precision rotor centering directly with respect to the stator housing, vane centering with respect to rotor (not the stator) and the dynamic balance design of the gliders required for practical single and dual vane devices. The devices uses roller bearings to control the radial position of the vane and control rods or pins are used to control axial positioning of the vane, its ‘centralization’ with respect to the rotor and the endplates. The positive displacement rotary vane compressors and vacuum pumps have friction reduction, efficiency enhancement and exceedingly long operating life as a result of the non-contact gas sealing of the process gas within the rotary vane compressors and vacuum pumps. In an embodiment the positive displacement compressing device is used in transportation vehicles.

Abstract: A variable displacement pump including a rotor, a plurality of vanes, a swingable cam ring, a suction port and a discharge port, wherein a dynamic radius of the vane which extends from a center of the rotor to a leading edge of the vane is gradually decreased in a closed section that is defined between a terminal end of the suction port and an initial end of the discharge port, along with rotation of the rotor, and a port timing defined as a position of the terminal end of the suction port or a position of the initial end of the discharge port with respect to a rotational position of the vane varies along with a swing motion of the cam ring.

Abstract: A pump unit includes a main pump (4) and a charge pump (5), the pump capacity of which is adjustable via an adjusting element. To adjust the pump capacity of the charge pump (5), an adjusting element of the charge pump (5) is acted upon by an adjusting force which is dependent on the inlet pressure of the main pump (4).

Abstract: A pump apparatus includes a drive shaft supported rotatably in a pump body; a power transmission member attached to the drive shaft, and configured to transmit power to the drive shaft; a pump element configured to pressurize and discharge working fluid; a discharge passage formed in the pump body, and configured to introduce the pressurized working fluid-discharged from the pump element to an external of the pump body; a control valve configured to control an amount of working fluid to be discharged through the discharge passage to the external, by controlling a movement of a valving element of the control valve on the basis of the pressurized working fluid; and an electromagnetic valve provided between the power transmission member and the control valve, and configured to control the control valve or a fluid pressure acting on the valving element of the control valve based on the pressurized working fluid.

Abstract: A fluid pumping system for a power transmission device includes a variable displacement vane pump having a housing containing a rotor, a plurality of vanes coupled to the rotor and a linearly translatable slide for varying the displacement of the pump. A control system varies the displacement of the pump and provides a fluid output pressure selected from a continuously variable range of output pressures which are independent from the operating speed of the pump. The control system includes a linear actuator for moving the slide between minimum and maximum pump displacement positions. The linear actuator includes an electric stepper motor for bi-directionally translating an actuator shaft acting on the slide.

Abstract: A variable displacement pump and pump control system therefor to pump a fluid at selected pump output flow rates having a variable displacement pump and a fluid volume displacement selection controller to select a volume of fluid to be forced from the pump inlet to the pump outlet by the rotating member during a rotation thereof. A movable lead screw is coupled to the displacement selection controller so as to be capable of altering the position thereof, and a lead screw positioner is provided for selectively moving, or preventing the moving of, the movable lead screw by extending and retracting the lead screw through a threaded opening.

Abstract: A fluid device includes a housing defining a fluid inlet and a fluid outlet. A variable displacement assembly is in fluid communication with the fluid inlet and the fluid outlet. The variable displacement assembly includes a rotor assembly, a flexible ring, and a plurality of ring supports. The rotor assembly includes a rotor having a plurality of reciprocating members. The flexible ring is disposed about the rotor assembly. The flexible ring includes an inner surface, which is adapted for engagement with the plurality of reciprocating members, and an outer surface. The plurality of ring supports is disposed about the flexible ring. Each of the plurality of ring supports includes a support portion and a pivot portion about which the ring support selectively pivots. The support portion is adapted for engagement with the outer surface of the flexible ring.

Abstract: An engine is described for operation on a fuel expanding about adiabatically in a power stroke of the engine. To aid the power stroke efficiency, the rotary engine contains one or more of a rotor configured to rotate in a stator, the rotor offset along both an x-axis and a y-axis relative to a center of the stator, a vane configured to span a distance between the rotor and the stator, where the inner wall of the stator further comprises at least one of: a first cut-out in the housing at the initiation of the power stroke, use of a build-up in the housing at the end of the power stroke, and/or use of a second cut-out in the housing at the completion of rotation of the rotor in the engine. The engine yields a cross-sectional area expanding during a portion of the power stroke at about the Fibonacci ratio.

Abstract: A rotary pump for producing a pressure medium flow for a consumer, includes a pump housing in which a curved ring is inserted. A rotor is rotatably borne on a drive shaft in the curved ring. The rotor carries displacement elements at a tangential distance to one another which form a pump chamber between the rotor and the curved ring with a suction opening. A pressure medium-activated adjusting device is operable for changing the eccentricity of the curved ring relative to the rotor, and includes a first pressure chamber and a second pressure chamber fluidically and tangentially distanced from the first pressure chamber The pressure in the first and second pressure chambers is controlled by a flow control valve, the low pressure chamber of which communicates with a first control line on a downstream side of a metering orifice.

Abstract: A variable capacity vane pump has a plurality of vanes radially extendably installed in their respective slots that are arranged in a circumferential direction in a rotor, a cam ring rockably provided on a supporting surface in a 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, and a seal member provided at an outer circumference side of the cam ring and defining 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 in a space outside the outer circumference of the cam ring. A center of the cam ring is offset to an inlet port side from a center of a driving shaft.

Abstract: A variable displacement vane pump includes a first body, a second body, an adapter ring, a cam ring, and a rotor. The first body includes a cylinder portion, and a base portion covering a first longitudinal end of an inner space of the cylinder portion. The second body covers a second longitudinal end of the inner space of the first body. The adapter ring has an outer radial periphery fitted and fixed to an inner radial periphery of the cylinder portion of the first body. The cam ring is mounted inside the adapter ring and supported by the adapter ring for lateral motion in contact with the contact area of the adapter ring. The rotor is mounted inside the cam ring. The adapter ring has a radial thickness that gradually increases when followed longitudinally of the adapter ring from the base portion of the first body toward the second body.

Abstract: A controlled-clearance sealing compressor device that provides precision rotor centering directly with respect to the stator housing, vane centering with respect to rotor (not the stator) and the dynamic balance design of the gliders required for practical single and dual vane devices. The devices uses roller bearings to control the radial position of the vane and control rods or pins are used to control axial positioning of the vane, its ‘centralization’ with respect to the rotor and the endplates. The positive displacement rotary vane compressors and vacuum pumps have friction reduction, efficiency enhancement and exceedingly long operating life as a result of the non-contact gas sealing of the process gas within the rotary vane compressors and vacuum pumps. In an embodiment the positive displacement compressing device is used in transportation vehicles.

Abstract: A vane machine comprises an inner rotor (28) and an outer rotor (51). A plurality of radially extending vane elements (32) separates first vane chambers (89) from one another. The van elements (32), with a radially inner end region (34), are accommodated in the inner rotor (28) in a radially displaceable manner and, with a radially outer end region (36), are accommodated in the outer rotor (51) in a pivotable manner. It is proposed that the radially inner end regions (34) of the vane elements (32) be accommodated in the inner rotor (28) at a fixed angle and that the outer rotor (51) comprise individual shoes (38) which are separate for each vane element (32) and in which the vane elements (32) are accommodated in a pivotable manner.

Abstract: A pump system including a control system for controlling a variable flow pump for controlling oil flow and oil pressure in a hydraulic circuit in an engine. The system includes a pump member, an actuating member capable of controlling the flow generated by the pump member, and a solenoid valve system including a solenoid valve portion and a pressure regulator valve portion. The solenoid valve system is operably associated with the pump and the pressure regulator valve portion is operably associated with the actuating member for selectively controlling the flow generated by the pump member. An electronic control unit is operably associated with the solenoid valve portion, wherein the electronic control unit is selectively operable to provide an input control signal to the solenoid valve portion for controlling oil flow and oil pressure.

Abstract: A variable delivery vane pump, in particular for oil, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about one own longitudinal axis (6), and presents a plurality of grooves (15) radially outwardly opened and slidingly engaged, each, by a respective vane (17) the vanes (17) being arranged essentially in contact with the stator (10) by interposing at least one sliding element (19; 27) extending about the axis (6) according to an angle smaller than 360°.

Abstract: Vane pump (10) mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring (70) is supported by a journal bearing (80). A relatively low sliding velocity is imposed between the cam ring and the vanes (26). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.

Abstract: A rotary vane pump is provided that provides an improved fluid replenishment and pressure relief system within a rotary vane pump system. A system, containing a rotary vane pump containing at least one relief cut between the housing and the rotor, functions to relieve fluid pressure normally found between the housing and the rotor. The fluid leaks from areas such as the rotational clearance required between the rotor and an inner wall of the housing. The system includes a reservoir in fluid communication with the relief cut wherein fluid leaks are then retained within the reservoir. A fluid distribution manifold employing a plurality of check valves, each corresponding to a respective chamber within the rotor, provides a controlled fluid feed from the reservoir to the rotor thereby balancing the fluidic pressure existing between the radially innermost ends of the vanes and the radially outermost ends of the vanes.

Abstract: A rock trap disposed in a feeder adapter of a combine directly behind a sickle bar of a combine header and in an area in front of a rearwardly directed conveyor located for receiving cut crop from transversely directed conveyor of the header. The rock trap has a trap door which can be selectively opened so as to drop beneath the header rocks collected therein.

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-capacity vane pump comprising a body (1) comprising a cavity (2) in which a mobile ring (3) can move, inside which a hub (4) is located which is rotatable around a fixed axis (R) and equipped with vanes (5) which during rotation are supported against an inner face of the mobile ring (3), displacing structure for moving the mobile ring (3) as a function of a control pressure between a position centered on the axis of rotation of the hub (4) and an extreme eccentric position with respect to the axis of rotation of the hub (4). According to the invention, the displacing structure of the mobile ring (3) comprise a recess (10) provided in the wall of the cavity (2) of the body (1), and a projection (9) formed on the outer face of the mobile ring (3) and designed to slide in the recess (10) of the cavity (2) of the body (1) so as to form a control chamber in which the control pressure is applied.

Abstract: A bearing assembly is provided for a fuel delivery system that includes a pump (10) having a housing that rotatably receives a rotor (20) carrying vanes (26) thereon, a cam ring (70) received between the housing and rotor (20), and a support member of yoke (50) encompassing the cam ring (70) to selectively vary fuel flow. The bearing assembly (80) is a journal bearing between the yoke (50) and the cam ring (70) and includes an annular surface having a central opening therethrough. The annular surface includes a first, high pressure pad (102) and a second, low pressure pad (104) substantially diametrically opposite the first pad and separated by first and second lands (106, 108). The circumferential extent of the first pad (102) is at least as great as an inner diameter of the cam ring (70). Circumferential ends of the second pad (104) are wider than circumferential ends of the first pad.

Abstract: Vane pump (10) mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring (70) is supported by a journal bearing (80). A relatively low sliding velocity is imposed between the cam ring and the vanes (26). This permits the use of less expensive and less brittle materials in the pump by allowing the pump to operate at much higher speeds without concern for exceeding vane tip velocity limits.

Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.

Abstract: A control system for a variable displacement pump. The control system is operably associated with an engine control unit for passively or actively controlling the output of the pump in response to signals from the engine control unit.

Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.

Abstract: An object of the present invention is to provide a method for manufacturing a multi-stage compression type rotary compressor which can avoid the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio while preventing the compressor from being increased in size. The gist of the present invention is that an inner diameter of a lower cylinder is altered without altering its thickness (or height), and a displacement volume ratio between first and second rotary compression elements is set to an optimum value in accordance with the alteration.

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: This invention relates to expansible chamber positive displacement pumps, motors, and engines and includes variable displacement features. It provides a different method of making vane, piston, and roller abutment pumping devices which has benefits in sealing, dynamic and pressure balancing, and increased rotational speeds; resulting in better performance and higher efficiency. Since this is a technology that is parallel to existing technologies, this application is complex.

Abstract: A variable displacement vane pump comprises a pump body having inlet and outlet ports, a rotor driven by a drive shaft and co-axially aligned therewith, a plurality of radially extending vanes slidably disposed in the rotor, and a slide pivotally disposed on a pivot in the pump body and having a central axis eccentric to the axis of the rotor. A plurality of fluid chambers are defined by the rotor, vanes, and slide. A spring acts on the slide to urge the slide in one direction. A regulating chamber is configured as a semi-circular cylinder intermediate the pump body and an outer surface of the slide, wherein a pressure regulating valve pressurizes the regulating chamber to pivot the slide against the force of the spring to decrease the volume of the fluid chambers. The slide includes a slide channel formed in a face to channel fluid leakage from the fluid chambers away from the regulating chamber.

Abstract: A variable pump or motor is providing including a housing with inlet and outlet ports and a vaned rotor. Spool ends are provided at either end of the rotor thereby enhancing the effective sealing of the pump and its overall efficiency. Piston actuators are also described. A sealing means is provided in conjunction with the use of a flexible belt wherein volumetric efficiency is substantially improved.

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.