Abstract: A hydraulic motor (10) comprising a front housing (12) which includes a first port (14) and a second port (16), a drive assembly (18), a drive link (22), and a shaft (24). The front housing (12) and the drive assembly (18) form a central bore (26) in which the drive link (22) and the shaft (24) are rotatably mounted. The drive assembly (18) comprises a spool valve (48) rotatably positioned within the central bore (26) and coupled to the shaft (24) by a key (140). Sealing rings (104) having a rotationally incompatible geometry (e.g., waved shapes) are used to seal interface surfaces of the rotor (54) and a high pressure seal assembly (156) is used to seal the front of a fluid chamber (154).

Abstract: A multi-stage internal gear/turbine fuel pump for a vehicle includes a housing having an inlet and an outlet and a motor disposed in the housing. The multi-stage internal gear/turbine fuel pump also includes a shaft extending axially and disposed in the housing. The multi-stage internal gear/turbine fuel pump further includes a plurality of pumping modules disposed axially along the shaft. One of the pumping modules is a turbine pumping module and another of the pumping modules is a gerotor pumping module for rotation by the motor to pump fuel from the inlet to the outlet.

Abstract: A gerotor motor including a brake package, and a method for setting the load holding torque of the brake package. The endcap assembly (21) defines a set of internal threads (85) disposed adjacent a brake package piston member (75). An enclosure member (87) defines a spring seat (115) for a set of Belleville washers (105), and defines a set of external threads (88) engaging the internal threads (85). Upon assembly of the motor and brake package, a resistance load is applied to a motor output shaft (43) corresponding to a desired load holding torque. The motor is pressurized sufficiently to rotate the output shaft in opposition to the resistance load. The enclosure member (87) is rotated so that it moves axially in a direction to increase the bias preload on the Belleville washers (105) until the output shaft (43) no longer rotates.

Abstract: A rotary fluid pressure device having a housing member, a manifold assembly, a gerotor set, an end plate, and a rotatably journaled torque transfer shaft interconnected with the gerotor set and extending within the housing member and manifold assembly. The gerotor set having an internally toothed stator member and a rotating rotor member disposed within the stator member. The rotor member having a first and second axial end surface and external teeth which interengage with the internal teeth of the stator to define a plurality of expanding and contracting volume chambers. The rotor member also having a first plurality of circumferentially spaced laterally directed fluid paths which extend through the rotor for fluid connection between the manifold assembly and the volume chambers, and a second plurality of circumferentially spaced, laterally directed fluid paths interposed between the first plurality of fluid paths for sequentially channeling fluid between both axial end surfaces.

Abstract: A hydraulic motor of the disc valve type has a disc valve with a plurality of commutation slots that can sequentially register with ports in a port plate as the disc valve is rotated with respect to the port plate. The commutation slots have a geometrical configuration that is complimentary in shape to a portion of the geometric configuration of the ports in the port plate to reduce the resistance to fluid flow through the ports and the slots when the complimentary shapes move into or from superimposed registering positions.

Abstract: A gerotor motor has a housing located adjacent a port plate. The housing has two fluid chambers on opposite sides of a disc valve. The disc valve is in sealing surface engagement with the port plate to prevent fluid from moving between the fluid chambers. The valve assembly has forward and rearward sides and has substantially equal volumes of material removed therefrom so as to balance the port plate against any torsional forces imposed on the valve assembly which might otherwise deflect the valve assembly to interfere with its sealing relationship with the port plate.

Abstract: A valve member includes an axially movable spool valve rotatably mounted in the valve member to cause the way that fluid is communicated between the inlet and outlet ports of the device and the volume chambers thereof. An outer surface of the spool has a configuration to react to fluid pressure to effect the timing between the gear set and the valving of valve member and that the timing therebetween will be adjusted when the spool valve is moved axially. A valve actuator comprising a spring loaded plunger controlled by fluid pressure at the inlet and outlet ports is in physical contact with one end of the valve spool.

Abstract: A rotary fluid pressure device has a first oil passage with relatively high pressure fluid therein surrounding the gear set; a plurality of second oil passageways connecting the first oil passageway to the expanding and contracting oil chambers; and fluid non-return valves in each of the second oil passageways to permit the flow of oil therethrough only in a direction from the first oil passageway to the oil chambers.

Abstract: A rotary fluid pressure device having a housing member, a manifold assembly, a gerotor set, a channeling plate and an end plate. The gerotor set having a stator member with at least one axial fluid path extending therethrough and a rotor member, disposed within said stator member, having an axial end surface with a recess, and a plurality of axially extending through holes for fluid flow therethrough adapted for hydraulically axially balancing its axial ends relative to the stator. The channeling plate having a first and second fluid passage extending therethrough, and a plurality of through holes. Means for routing the high pressure fluid from the housing member through the gerotor set, through the channeling plate first and second fluid passages, into and subsequently out of a cavity between the channeling plate and the end plate and into the rotor recess to overbalance the rotor towards the manifold assembly.

Abstract: A hydraulic device for one of a motor and pump, having a manifold assembly positioned between a gerotor set and a housing for the device, the manifold assembly adapted for conducting pressurized fluid to the gerotor set and conducting exhaust fluid from the gerotor set. The manifold assembly having a first axial end, a second axial end, a central internal bore extending freely from the first axial end to the second axial end and adapted for conducting at least a portion of one of the fluids, a first fluid passage extending directly from the central internal bore to a location radially outward from the central internal bore and therefrom to the second axial end, and a second fluid passage extending substantially laterally from the second axial end to the first axial end.

Abstract: A rotary fluid pressure device having a housing member, a manifold assembly, an internally generated rotor type gerotor set, an end plate, and a rotatably journaled torque transfer shaft interconnected with the gerotor set and extending within the housing member and manifold assembly. The gerotor set having at least an internally toothed stator member and a rotating rotor member disposed within the stator member. The rotor member having a first and second axial end surface and external teeth which interengage with the internal teeth of the stator to define a plurality of expanding and contracting volume chambers. The rotor member also having a plurality of circumferentially spaced laterally directed fluid paths fluidly connecting the manifold assembly with a plurality of circumferentially spaced radiating fluid paths which directly connect with the volume chambers. The fluid pressure device further including a plurality of coupling members for interconnecting the components.

Abstract: A rotary fluid pressure device having a housing member, a manifold assembly, a gerotor set, an end plate, and a rotatably journaled torque transfer shaft interconnected with the gerotor set and extending within the housing member and manifold assembly. The gerotor set having an internally toothed stator member and a rotating rotor member disposed within the stator member. The rotor member having a first and second axial end surface and external teeth which interengage with the internal teeth of the stator to define a plurality of expanding and contracting volume chambers. The rotor member also having a first plurality of circumferentially spaced laterally directed fluid paths which extend through the rotor for fluid connection between the manifold assembly and the volume chambers, and a second plurality of circumferentially spaced, laterally directed fluid paths interposed between the first plurality of fluid paths for sequentially channeling fluid between both axial end surfaces.

Abstract: A hydraulic motor 10/110/210 has an end cover 12/112/212 including a first port 14/114/214 and a second port 16/116/216, and a gerotor drive assembly 18/118/218 which hypocycloidally moves a drive link 22/122/222. The motor's flow circuit comprises a working path (e.g., for providing rotational motion) from the end cover 12/112/212, through the drive assembly 18/118/218 and back to the end cover 12/112/212. Bolts 26/126/226 extend through registered openings in the end cover 12/112/212, the drive assembly 18/118/218 and a housing 20/120/220 and the bolts 26/126/226 are positioned in a circular array outside the motor's pressure vessel whereby the motor 10/110/210 has a “dry bolt” design. The motor's flow circuit can also comprises a non-working path (for cooling, lubrication and/or sealing purposes) which circulates fluid through chambers surrounding the drive train components.

Abstract: In a G-rotor pump for the conveyance of fuel in a motor vehicle, pockets are arranged in an external rotor. Dirt particles in the fuel can collect in the pockets. A wear of regions of the external rotor and of the internal rotor which roll on one another is consequently kept particularly low.

Abstract: A two-speed gerotor motor (10) including motor valve means (19,43) to communicate fluid to and from expanding (33E) and contracting (33c) fluid volume chambers. The motor includes a shift valve spool (61) to cause the motor to operate either in the normal, low-speed, high-torque (LSHT) mode (FIG. 3) or in a high-speed, low-torque (HSLT) mode (FIG. 4). When the motor operates in HSLT mode, certain of the volume chambers comprise recirculating volume chambers (33R). The motor (10) defines a supplemental fluid passage (89) through which fluid is communicated from a system charge pump (73) to each of the recirculating volume chambers (33R). A control valve (83) is operable, in a shift mode (S) to permit fluid communication from the charge pump (73) to the supplemental fluid passage (89), thus preventing cavitation during shifting of the motor (10), especially when shifting from the HSLT mode to the LSHT mode.

Abstract: A hydraulic motor (10) comprising a front housing (12) which includes a first port (14) and a second port (16), a drive assembly (18), a drive link (22), and a shaft (24). The front housing (12) and the drive assembly (18) form a central bore (26) in which the drive link (22) and the shaft (24) are rotatably mounted. The drive assembly (18) comprises a spool valve (48) rotatably positioned within the central bore (26) and coupled to the shaft (24) by a key (140). Sealing rings (104) having a rotationally incompatible geometry (e.g., waved shapes) are used to seal interface surfaces of the rotor (54) and a high pressure seal assembly (156) is used to seal the front of a fluid chamber (154).

Abstract: A hydraulic pressure device valve having an outer circumferential support to a surrounding housing journal is constructed of a series of flat plates brazed together to form a unitary member containing substantially all of the valving passages of the entire device.

Abstract: The invention concerns a hydraulic machine (1) with a tooth set (2), having a gear wheel (3), which is arranged to be rotating and orbiting in a toothed ring (4), the tooth set (2) being arranged between two plates (10, 11) in the axial direction. It is desired to extend the life of such a machine, also when operated with an impurified hydraulic fluid. For this purpose, at least a section (9′) of the circumferential surface of one of the two components, toothed ring (4) and gear wheel (3), is made of a material, which is substantially harder than the material of the part of the other component, gear wheel (3) and toothed ring (4), bearing on this section.

Abstract: A hydraulic motor 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. An output shaft is operatively connected to the wheel.

Abstract: A multiple speed ratio gerotor motor having first (13) and second (19) gerotor gear sets as the displacement mechanisms, and a commutating valve member (43) of the well known type. In one embodiment (FIGS. 1-5) there is provided a selector valve section (15) disposed between the first and second gerotor gear sets, and in a low speed mode (FIG. 5A), fluid flows from the commutating valve member (43) through the first volume chambers (39), then through the selector valve section, then through the second volume chambers (66). In a high speed mode (FIG. 5B), flow out of the first volume chambers (39) is blocked by the selector valve section (15), and fluid in the second volume chambers (66) flows through the selector valve section to the case drain region (106). In a free wheel mode (FIG. 5C), both the first and second volume chambers are open to case drain. In another embodiment (FIG.

Abstract: An engine is disclosed. According to one embodiment of the present invention, the engine comprises a compressor, and combustor, and an expander. The compressor compresses ambient air. The combustor burns the compressed air, and produces exhaust gasses. The expander receives the exhaust gases from the combustor, and expands the exhaust gasses. The compressor may be a gerotor compressor or a piston compressor having variable-dead-volume control. The expander may be a gerotor expander or a piston expander having variable-dead-volume control. In another embodiment, an engine comprises a piston compressor, a combustor, a piston expander, and a pressure tank. The piston compressor compresses ambient air. The combustor bums the compressed air, and produces exhaust gasses. The piston expander receives the exhaust gasses from the combustor, and expands the exhaust gasses. The pressure tank receives and stores the compressed air from the compressor.

Abstract: A hydrostatic planetary rotation machine has a displacer part (1) acting as a drive part or power take-off part and a rotary valve (3) serving for supplying working fluid to and removing said fluid from the displacer part (1), the displacer part (1) having a first rigid housing part (4) having a first inner tooth system (5) with a number d of teeth, which cooperates with a first outer tooth system (7), having a number c of teeth, on a rotatable, eccentrically arranged rotary piston (6). The rotary piston (6) has a second inner tooth system (8) which has a number b of teeth and meshes with a second outer tooth system (9), having a number a of teeth, on a centrically mounted shaft (2). Here, d−c=1 and b−a=2. Shaft bearings (10, 11) are arranged directly adjacent on the left and right of the displacer part (1).

Abstract: A hydraulic motor 10/110/210 has an end cover 12/112/212 including a first port 14/114/214 and a second port 16/116/216, and a gerotor drive assembly 18/118/218 which hypocycloidally moves a drive link 22/122/222. The motor's flow circuit comprises a working path (e.g., for providing rotational motion) from the end cover 12/112/212, through the drive assembly 18/118/218 and back to the end cover 12/112/212. Bolts 26/126/226 extend through registered openings in the end cover 12/112/212, the drive assembly 18/118/218 and a housing 20/120/220 and the bolts 26/126/226 are positioned in a circular array outside the motor's pressure vessel whereby the motor 10/110/210 has a “dry bolt” design. The motor's flow circuit can also comprises a non-working path (for cooling, lubrication and/or sealing purposes) which circulates fluid through chambers surrounding the drive train components.

Abstract: The invention concerns a hydraulic machine (1) with a tooth set (2), having a gear wheel (3), which is arranged to be rotating and orbiting in a toothed ring (4), the tooth set (2) being arranged between two plates (10, 11) in the axial direction. It is desired to extend the life of such a machine, also when operated with an impurified hydraulic fluid. For this purpose, at least a section (9′) of the circumferential surface of one of the two components, toothed ring (4) and gear wheel (3), is made of a material, which is substantially harder than the material of the part of the other component, gear wheel (3) and toothed ring (4), bearing on this section.

Abstract: Two inner gears are overlapped with each other through a partition wall and are eccentrically arranged at an inner peripheral side of an outer gear, and eccentric directions of both the inner gears are shifted from each other by 180° to the opposite side. By this, loads in an outer diameter direction due to a rise in fuel pressure affect one outer gear from the two inner gears oppositely to each other by 180°, so that an eccentric load is not generated, and sliding resistance of the outer gear to a cylindrical casing becomes small. Further, the number of teeth of the outer gear is made odd, and the number of teeth of the inner gears is made even.

Abstract: The invention relates to a toothed rotor set for a pump, especially for a lubricating oil pump for internal combustion engines, wherein the toothed rotor set has a toothed configuration similar to a toothed ring pump and functioning and operation of said toothed rotor set corresponds to that of a toothed ring pump.

Abstract: A hydraulic pressure device valve having an outer circumferential support to a surrounding housing journal is constructed of a series of flat plates brazed together to form a unitary member containing substantially all of the valving passages of the entire device.

Abstract: A hydraulic motor 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. An output shaft is operatively connected to the wheel.

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.

Abstract: A seal for a hydraulic pressure device, which seal is located at the joint where one part circumferentially surrounds another part with both of the parts contacting a single adjoining surface, seal being in sealing contact with both parts and the adjoining surface.

Abstract: To improve the sliding rotations of pins within pin (roller) retaining holes 113a. A method of fabricating a pin (roller) retaining ring in an internal meshing gear mechanism, the mechanism having an internal gear 20 and external gears 5a, 5b put into internal mesh with the internal gear, the internal gear consisting of a pin (roller) retaining ring 110 having half-round pin (roller) retaining holes in its inner periphery and pins (rollers) 11 rotatably fitted to the respective pin retaining holes, is provided. Here, before the bore diameter &phgr;DA of a pin retaining ring base material 151 is machined to a finished diameter, the pin retaining holes 113a are cut as full round holes into the ring base material. The inner surfaces of the pin retaining holes 113a are finished by roller burnishing, and then the bore diameter of the pin retaining ring is expanded to the finished diameter to obtain the pin retaining ring having the half-round pin retaining holes.

Abstract: A multiple speed ratio gerotor motor having first (13) and second (19) gerotor gear sets as the displacement mechanisms, and a commutating valve member (43) of the well known type. In one embodiment (FIGS. 1-5) there is provided a selector valve section (15) disposed between the first and second gerotor gear sets, and in a low speed mode (FIG. 5A), fluid flows from the commutating valve member (43) through the first volume chambers (39), then through the selector valve section, then through the second volume chambers (66). In a high speed mode (FIG. 5B), flow out of the first volume chambers (39) is blocked by the selector valve section (15), and fluid in the second volume chambers (66) flows through the selector valve section to the case drain region (106). In a free wheel mode (FIG. 5C), both the first and second volume chambers are open to case drain. In another embodiment (FIG.

Abstract: A hydraulic device includes a housing enclosing a hydraulic motor having a wobble shaft driven by a rotor of a gerotor gear set. An outer end of the wobble shaft is connected to the inner end portion of an output shaft. The output shaft extends axially through the housing and outward from the end of the housing opposite from the motor. A brake assembly holds the motor output shaft against rotation when the hydraulic motor is not operated. The brake assembly includes a series of compression springs provided toward the motor end of the housing, brake disks provided toward the end of the housing opposite from the motor, and an annular piston disposed axially between the springs and the brake disks. The piston and housing include corresponding radial stop surfaces that engage across a major portion of the stop surfaces to prevent over-compression of the springs and the piston from cocking when the piston engages the housing.

Abstract: A hydraulic gerotor motor utilizing the holes surrounding the main assembly bolts together with interconnecting radially extending passages so as to allow for the transfer of fluid axially through the device from a single fluid input hole to an area 360° surrounding a valve.

Abstract: A brake assembly of the type in which there are provided brake discs (87,89) which are pressed into frictional engagement by a lock piston (65). The lock piston is of the type applied by a set of Belleville washers (73) and released by fluid pressure in a chamber (113). The invention provides a disengagement mechanism (95) associated with the lock piston (65) and including a manually operable handle (107) disposed external to a housing (21) enclosing the brake assembly. The handle is moveable between a normal position (FIG. 2) and a disengagement position (FIG. 4) in which the lock piston is moved toward at least a partially retracted position, in opposition to the force of the Belleville washers. When pressurized fluid is again communicated to the chamber (113), the lock piston is biased to its fully retracted position, and the handle (107) of the disengagement mechanism (95) returns to its normal position (FIG. 2), ready for the next time the operator wants to manually disengage the brakes.

Abstract: A pressure compensating manifold for a gerotor device having a manifold with bidirectional valving passages and a passage selectively connecting as least one of such bidirectional passages to a chamber behind the manifold so as to pressure equalize the gerotor structure.

Abstract: A pressure transfer system for a gerotor motor having a rotating valve increased non-operational pressure zone, and a reduced pressure cavity, the system comprising a check valve, said check valve being in the rotating valve, and said check valve connecting the increased non-operational pressure zone to the reduced pressure zone.

Abstract: A trochoidal gear pump or engine uses a coaxial hub with the outer and/or inner rotor and an associated rolling element bearing assembly that preferably uses pre-loaded bearings to precisely set the rotational axis and/or the axial position of the rotor with which it is associated. This allows the fixed-gap clearance between the rotor surfaces and the housing surfaces or the other rotor surfaces to be set at a distance that minimizes operating fluid shear forces and/or by-pass leakage and eliminates gear tooth wear thus preserving effective chamber to chamber sealing. The device is useful in handling gaseous and two-phase fluids in expansion/contracting fluid engines/compressors and can incorporate an output shaft that accommodates an integrated condensate pump for use with Rankine cycles. A vent from the housing cavity to a lower pressure input or output port regulates built-up fluid pressure in the housing thereby optimizing the efficiency of the device by controlling bypass leakage.