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| Number | Title | Issue Date |
| 7399166 | Variable displacement pump A variable displacement pump includes a control valve formed with a high-pressure chamber for introducing therein high-pressure fluid on the upstream side of a metering orifice, a pressure chamber for introducing therein pressure fluid on the downstream side of the ... | 07/15/2008 |
| 7322271 | Rotary radial piston machine A rotary displacement machine (10) with radial pistons (19), includes a bearing (29) having a rotating thrust ring (28) and a stationary outer ring (30), with bearing rollers (31) therebetween. The thrust ring (28) in... | 01/29/2008 |
| 7318705 | Variable displacement pump with communication passage A variable displacement pump includes a rear cover and side plate arranged on both sides of a cam ring and making slide contact with the cam ring. The rear cover has an end face on the side of the cam ring, which is formed with a suction port. A seal member is arran... | 01/15/2008 |
| 7018178 | Variable displacement pump and control therefore for supplying lubricant to an engine 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. ... | 03/28/2006 |
| 6976830 | Variable displacement pump Within a cam ring (8), a rotor having a plurality of vanes (27) is eccentrically disposed. A metering orifice (136) is provided halfway on a discharge passage (135) of pressure fluid discharged from the pump, and a control valve is activa... | 12/20/2005 |
| 6913446 | Method for improving the efficiency of a variable displacement pump An auxiliary solenoid controlled variable displacement power steering pump, hydraulic systems incorporating same, and method for improving the efficiency of variable displacement power steering pumps. In one embodiment, a rotor is arranged within a pump body, and a ... | 07/05/2005 |
| 6524076 | Variable displacement pump including a control valve A pump including a pump chamber 18, formed in a pump body 11, between a cam ring 17 and a rotor 15. The cam ring is formed so as to move in a direction whereby the pump capacity of the pump chamber increases and decreases. First and second fluid pressure ... | 02/25/2003 |
| 6413054 | Fuel injection pump A fuel injection pump having a cam drive and an injection adjuster piston, acting on the cam drive and serving the purpose of an injection onset adjustment. The injection adjuster piston on a face end encloses at least one pressure chamber that via a cont... | 07/02/2002 |
| 6224346 | Fluid pump An apparatus for moving fluid from a first location to a second location comprises a housing containing a pump body having a central passageway with a fluid inlet and first and second fluid outlets in communication with the passageway. A shuttle having fi... | 05/01/2001 |
| 6126420 | Infinitely variable ring gear pump An infinitely variable ring gear pump comprising a stationary casing, an internal rotor (3) in said casing rotatably supported and driven by means of a shaft (2) and an external rotor (4) likewise rotatably supported, meshing with the internal rotor (3), ... | 10/03/2000 |
| 6109884 | Rotational hydraulic transformer A rotational hydraulic transformer for boosting system pressure of a hydraulic system, which is continuous, compact and has little pulsation, comprises: a first volume increasing/decreasing mechanism Y1 for cyclically and continuously increasing/decreasin... | 08/29/2000 |
| 6010311 | Hydraulic radial piston machines A hydraulic reciprocating piston machine having a housing, a rotatable cylinder-barrel having a series of cylinders and each cylinder containing a piston which is operatively connected to a reaction member. The reaction member being urged by the forces cr... | 01/04/2000 |
| 5980215 | Adjustable hydrostatic pump with additional pressure change control unit An adjustable hydrostatic pump (10), in particular a piston pump, is proposed, whose cam ring (22) is adjustable via a hydromechanical adjusting assembly (35) and which has a device for active noise abatement. A pressure chamber (39) of a adjusting piston... | 11/09/1999 |
| 5878648 | Adjustable radial piston machine An adjustable radial piston machine (pump or motor) is described whose drive mechanism (10) has a comparatively compact structure and an especially good mechanical efficiency. The drive mechanism (10) has a bearing ring (19) which is arranged concentric t... | 03/09/1999 |
| 5865087 | Rotary variable displacement fluid power device A cooperating rotor device having a first rotor supported for rotation about a first rotation axis (R1) and a second rotor supported for rotation about a second rotation axis (R2). A cylinder rotor (32), supporting a plurality of radially aligned cylinder... | 02/02/1999 |
| 5848565 | Radial piston machines A radial piston hydrostatic machine having an outer housing structure and defining an internal chamber, a drive-shaft supported in the housing and operatively connected to the cylinder-barrel, the cylinder-barrel having a number of radial cylinders, each ... | 12/15/1998 |
| 5775306 | Advance mechanism An advance mechanism for a pump comprises a fluid operable piston arranged to have pressurized fluid applied to a first end thereof to adjust the axial position of the piston. The arrangement further comprises means for applying fluid under pressure to a ... | 07/07/1998 |
| 5752427 | Adjustable hydro-static radial piston machine A hydrostatic radial piston machine 10 is proposed, whose adjustable reciprocating ring 18 has integrated means for detecting the eccentricity 20 between the reciprocating ring 18 and the rotor 14. In combination with the rotating rotor 14 and the binding... | 05/19/1998 |
| 5676034 | Neutral centering device for hydrostatic transmission In a hydraulic transaxle, a radial ball piston pump and motor combination receive input torque and translate it into output torque, the direction of which is determined by the position of a cam ring located in the transaxle housing. This cam ring is movab... | 10/14/1997 |
| 5651301 | Hydrostatic piston machines A radial piston hydrostatic machine having an outer housing structure comprising at least two housing elements connectable together along a parting-plane arranged perpendicular to the rotational axis of said drive-shaft to define an internal chamber, a dr... | 07/29/1997 |
| 5580223 | Fuel injection pump for internal combustion engines A distributor fuel injection pump for internal combustion engines having at least one pump piston, which is guided in a cylinder bore and defines a pump work chamber therein and whose axial feed stroke motion is produced by a cam drive having at least one... | 12/03/1996 |
| 5503535 | Hydraulic radial piston machines A hydrostatic piston machine having a housing comprising two shells of a part-cylindrical form, the shells connectable together along a parting-plane in which the central axes of the drive-shaft and cylinder-barrel lie. Each housing element is provided wi... | 04/02/1996 |
| 5477680 | Motor driven hydraulic tool with variable displacement hydraulic pump A hydraulic drive system for a battery operated portable compression tool. The tool has an electric motor. The drive system has a self-regulating variable displacement pump with a rotatable conduit frame having radial conduits, pistons reciprocally locate... | 12/26/1995 |
| 5244354 | Fuel pumping apparatus A fuel pumping apparatus has a fixed body in which is defined bores containing pumping plungers. The plungers are moved inwardly by cam lobes on a rotatable cam ring to displace fuel to an associated engine. The cam ring is provided with an annular extens... | 09/14/1993 |
| 5234321 | Variable displacement hydrostatic pump and neutral return mechanism therefor A neutral centering spring mechanism (71) is provided for a variable displacement hydrostatic pump (25) of the type of which control of the displacement occurs in response to rotation of a control shaft (101;101'). Disposed about the control shaft is a pa... | 08/10/1993 |
| 5228290 | Hydrodynamic variator of velocity having radial pistons The improved hydrodynamic variator of velocity comprises a pump (3) having radial pistons and a hydromotor (4) also having radial pistons. At least the pump is arranged with a variable eccentricity and there is provided a central body (56) the latter havi... | 07/20/1993 |
| 5183392 | Combined centrifugal and undervane-type rotary hydraulic machine A rotary hydraulic machine having particular utility as a fuel pump for aircraft turbine engines that combines the desirable features of vane-type and centrifugal-type machines of similar character--i.e., high pressure positive displacement at low speed c... | 02/02/1993 |
| 4915836 | Solids dispersion transfer pump with intermediate chamber A vertical pump for transferring a dispersion of solids in a liquid comprising an upper chamber for receiving the dispersion; an intermediate chamber in fluid communication with the upper chamber and including an outlet nozzle for discharging the dispersi... | 04/10/1990 |
| 4913632 | Fuel injection pump A rotary distributor fuel injection pump includes a rotary distributor member movable axially in a body part. The distributor member has a transverse bore in which is mounted a pumping plunger. At its outer end the plunger is engaged by a cam follower inc... | 04/03/1990 |
| 4784577 | Pump pressure sensor A back pressure sensor comprising a flexible beam having a pivot end with a pivot pin and a drive connector end with a means for engaging a pump drive. A pump actuator is connected to the flexible beam at a position intermediate the ends and connects with... | 11/15/1988 |
| 4711616 | Control apparatus for a variable displacement pump A control apparatus for a variable displacement pump includes a variable displacement pump having an inlet port and a discharge port driven by an external engine. A piston assembly is provided for varying the amount of displacement of the pump. The contro... | 12/08/1987 |
| 4710106 | Volume controlling device for variable volume pump The device of this invention has a variable capacity pump, a channel through which the discharged fluid from the pump passes toward an actuator, a variable choke located in the channel and pressure detecting means which detects the pressure difference on ... | 12/01/1987 |
| 4697991 | Rotary pump having clutch which selects suitable power source As a rotary pump, which is typically provided on an automobile, is provided with two alternative sources of motive power, typically including a driving connection to the automotive engine, and driving connection to an electric motor. These driving connect... | 10/06/1987 |
| 4652215 | Variable capacity radial piston pump A variable capacity radial piston pump is disclosed, in which the radially outer ends of the pistons are constrained by engagement with the radially inner surface of a cam ring assembly that includes a radially inner ring, a radially outer ring, and rolla... | 03/24/1987 |
| 4634349 | Variable displacement fluid pump A variable displacement fluid pump comprises a rotor rotatably disposed within a housing, an eccentric ring movable close to and apart from the rotor to change a first eccentricity between a center of an inner periphery of the eccentric ring and a fixed c... | 01/06/1987 |
| 4282844 | Fuel pumping apparatus A fuel pumping apparatus for a compression ignition engine includes a fluid pressure operable piston for determining the timing of delivery of fuel. Fuel control means is provided which includes a lever operable to increase the idling speed of the engine ... | 08/11/1981 |
| 4213742 | Modified volute pump casing The specification discloses a centrifugal pump in which radial thrust on the impeller shaft is reduced by employing a modified volute casing in which the casing flow area downstream from the cutwater to a point generally opposite the cutwater is significa... | 07/22/1980 |
| 4177008 | Centrifugal pump A primary recirculating pump for pressurized water or boiling water nuclear reactors has a spherical housing with a radially extending integral outlet, a rotary impeller which is insertable or removable through a sealable opening of the housing, and a com... | 12/04/1979 |
