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| Number | Title | Issue Date |
| 7371053 | Two-stage hydraulic pump A two-stage hydraulic pump includes a rotor, a ring, and a plurality of rollers disposed in slots formed on the rotor. The pump has two inlet ports and two outlet ports, which are disposed inwardly and outwardly, respectively, of the rollers. A valve mechanism is in... | 05/13/2008 |
| 7371055 | Tandem pump unit The present invention provides a tandem pump unit that includes: a first hydraulic pump and a second hydraulic pump respectively having a first pump shaft and a second pump shaft respectively having adjacent ends connected together so that the first and second pump ... | 05/13/2008 |
| 7367782 | Pump plate of a rotary feed pump In a pump plate (26) of a feed pump, an inlet port (26b) and an outlet port (26c) are formed around a shaft hole (26a) through which a driving shaft is inserted, and a rib (26f), which partitions each of... | 05/06/2008 |
| 7361000 | Tandem pump unit The present invention provides a tandem pump unit that includes: a first hydraulic pump and a second hydraulic pump respectively having a first pump shaft and a second pump shaft respectively having adjacent ends connected together so that the first and second pump ... | 04/22/2008 |
| 7331584 | Chuck with nutating gear reduction A tool chuck may include a chuck body that supports chuck jaws. The chuck body may define a longitudinal axis. A driven gear may be mounted for rotation on the chuck body. The rotational axis of the driven gear may be parallel to the longitudinal axis of the chuck b... | 02/19/2008 |
| 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 |
| 7314353 | Pump assembly for transporting a cooling fluid A pump assembly includes a cam member arranged to rotate about an axis, and a piston pump having a cylinder body with a biased piston drivingly displaceable within the cylinder body and engageable with the cam member such that rotation of the cam member corresponds ... | 01/01/2008 |
| 7288904 | Centralized control device for controlling the application of voltage to a load provided with a power factor correction capacitor A centralized device for supply voltage control of a load with power factor correction condensers for lighting engineering applications has an array converter for obtaining a portion of power, with a plurality of switches located between the network sinusoidal suppl... | 10/30/2007 |
| 7278263 | Charge pump for a hydraulic pump A charge pump design for a hydraulic drive apparatus such as a hydrostatic transmission, integrated hydrostatic transaxle or pump having a rotatable pump cylinder block mounted in a sump and connected to a hydraulic circuit by means of a center section or the like. ... | 10/09/2007 |
| 7257948 | Dual pump apparatus A dual pump apparatus having first and second pump housings is disclosed. A first end cap is mounted to the first housing to form a first sump and a first pump cylinder block is located therein. A second end cap is mounted to the second housing to form a second sump... | 08/21/2007 |
| 7185577 | Tandem pump unit The present invention provides a tandem pump unit that includes: a first hydraulic pump and a second hydraulic pump respectively having a first pump shaft and a second pump shaft respectively having adjacent ends connected together so that the first and second pump ... | 03/06/2007 |
| 7118350 | Radial piston pump The invention relates to a radial piston pump unit for a high pressure injection system with a pump housing in which a driveshaft with an eccentric section is mounted. A reciprocating ring sits on the above section and drives at least one spring-loaded piston which ... | 10/10/2006 |
| 7021904 | Swash plate type hydraulic pump or motor A swash plate type hydraulic pump or motor comprises first and second swash plates which move reciprocally while opposing first and second pistons, so as to expand and contract a volume chamber according to rotation of a cylinder block. Drive pistons push on the swa... | 04/04/2006 |
| 7007468 | Charge pump for a hydrostatic transmission A charge pump design for a hydraulic drive apparatus such as a hydrostatic transmission, integrated hydrostatic transaxle or pump having a rotatable pump cylinder block mounted in a sump and connected to a hydraulic circuit by means of a center section or the like. ... | 03/07/2006 |
| 6971857 | Fuel injection pump A fuel injection pump prevents the uninterrupted supply of fuel through an orifice to a cam chamber. An orifice inlet is formed on the same plane as a wall surface of a discharge fuel chamber. As a result, foreign substances, which are carried with the flow of the f... | 12/06/2005 |
| 6957872 | Integrated pre-charge for controlled brake systems First and second pumps are integral in that the pumps are driven by a common motor. The first pump is driven in pumping motion by an eccentric disposed on the motor shaft and the second pump is driven in pumping motion by an end of the motor shaft. The first pump ca... | 10/25/2005 |
| 6916158 | Radial piston pump A piston pump including an inlet manifold, and outlet manifold, and a piston ring sandwiched between the inlet and outlet manifolds. The inlet manifold has a first face and a second face with at least one outlet formed in the second face. The outlet manifold has a f... | 07/12/2005 |
| 6769413 | Fuel injection pump A fuel injection pump includes a cam shaft (7) driving a plunger (4) and a feed pump (3) assembled therein for feeding fuel pressured by the plunger (4). A flange part (52) projecting radially is provided on the cam shaft (7... | 08/03/2004 |
| 6694729 | Pump A pump unit having a pump cylinder block mounted in a housing on an end cap. The cylinder block is driven by a pump input shaft, where the input shaft has a first driven end and a second end, and the second end extends through the end cap and out of the h... | 02/24/2004 |
| 6672843 | Dual pump apparatus comprising dual drive shafts and auxiliary pump A dual pump apparatus for use on a vehicle or industrial application having a housing in which a pair of hydraulic pumps are mounted, having by at least one charge pump mounted on an end cap, and the trunnion arms for controlling the hydraulic pumps exten... | 01/06/2004 |
| 6644931 | System for pumping low thermal conductivity gases In a vacuum pumping system according to the invention, the Roots or claw multistage dry primary pump discharges into an outlet stage including an additional piston or membrane pump connected in parallel with a preliminary evacuation pipe including a check... | 11/11/2003 |
| 6565333 | Fluid discharge apparatus and fluid discharge method A positive displacement pump is composed of a first actuator for relatively moving a piston and a housing, a cylinder for accommodating the piston, and a second actuator for relatively moving the cylinder and the housing.... | 05/20/2003 |
| 6454543 | Selectively operable multiple pump assembly The present invention relates to a space-saving and weight-saving motor-and-pump assembly which comprises a drive motor and a pump unit driven by the shaft of the said motor. In order to supply in parallel as many media as possible with an assembly of thi... | 09/24/2002 |
| 6361282 | Dual pump unit A dual pump unit comprising two hydraulic pumps (2,3) with coaxially mounted drive shafts (4,5) that are coupled to each other in a non-positive fit by means of a coupling member (28). The coupling member (28) surrounds a connecting member (15), wherein h... | 03/26/2002 |
| 6129518 | Perfected pumping device for feeding fuel from a tank to an internal combustion engine An on-off valve is connected between a high-pressure pump and a low-press pump and is sized to be rapidly activated during the cranking stage of an internal combustion engine. After actuating the on-off valve, surplus fuel is drained into an inner chambe... | 10/10/2000 |
| 6079957 | Soft start valve A fluid pumping apparatus (10) includes a soft start valve (16) coupled with the outlet of a pump (14) driven by an electric motor (12) for reducing the startup current of the motor (12). The preferred valve (16) includes a fluid chamber (32), a valve ope... | 06/27/2000 |
| 6053706 | Oil pump with integrated oil metering device An oil pump for use in a vehicle engine includes a rotary pump for pressurizing oil to be pumped, and a movable piston cooperating with the rotary pump to facilitate metering of oil to and from the pump. The oil metering device is incorporated directly in... | 04/25/2000 |
| 5571243 | Pump device for supplying fuel from a tank to an internal combustion engine A device presenting a high-pressure pump, and a low-pressure pump connected pstream from the first. To prevent damage in the event of a fault on the device, the connection between the low- and high-pressure pumps is provided with a cutoff valve which is cl... | 11/05/1996 |
| 5501578 | Hydrostatic axial piston pump with three bearing arrangement A hydrostatic pump of the axial piston type having a significantly reduced overall length due to a special three point bearing arrangement for the main shaft (1) of the pump and the charge pump shaft (12). The improvement comprises a bearing assembly whic... | 03/26/1996 |
| 5353766 | Distributor for a high pressure fuel system A fuel distributor is provided which is capable of distributing fuel through plural fuel injection lines to the corresponding cylinders of a multicylinder internal combustion engine and which includes a distributor housing including a supply inlet passage... | 10/11/1994 |
| 5340284 | Two stage fuel pump with pressure passage in the first stage rotor A fuel pumping apparatus for supplying fuel to an internal combustion engine has a drive shaft which is coupled to a rotary part of a high pressure pump. A low pressure pump for supplying fuel to the high pressure pump has a rotor mounted about the drive ... | 08/23/1994 |
| 4915592 | Inner-cam type distribution fuel injection pump An inner-cam type distribution fuel injection pump has a lubricating system for lubricating the interior of a cam chamber defined by an inner cam and a rotor with a lubricating oil having a viscosity higher than the viscosity of fuel oil. The pump is stru... | 04/10/1990 |
| 4869648 | Vane type rotary fuel pump A fuel pumping apparatus includes a high pressure pump and a low pressure pump contained in a housing and driven by a drive shaft which is coupled to a rotary part of an internal combustion engine. The low pressure pump is a vane pump having a rotor in wh... | 09/26/1989 |
| 4792285 | Injection pump A fuel injection pump includes a pumping section that is segregated from the drive mechanism to permit independent lubrication of the latter, thereby avoiding any need for reliance upon the fuel supplied for that purpose. Generally, the unit will have two... | 12/20/1988 |
| 4662826 | Vacuum pump system including serially connected rotary and reciprocating vacuum pumps A vacuum pump includes a rotary vacuum pump including a pair of rotors cooperating to suck gas, a driving source connected to a shaft of one of the pair of rotors, timing gears connected to respective shafts of the rotors and transmitting the driving forc... | 05/05/1987 |
| 4662825 | Hydraulic pump A supply pump for continuously supplying pressurized fuel to an accumulator-type injector system employs an electrically controlled metering valve for regulating the supply of fuel to the pump chamber. The output pressure of the pressurized fuel from the ... | 05/05/1987 |
| 4553903 | Two-stage rotary compressor A two-stage rotary compressor makes use of a piston-vane arrangement where both stages are built end to end and where the same members (piston-vanes) work for both stages, the "axial pistons" of the second stage becoming the dividing "vanes" in the first ... | 11/19/1985 |
| 4484863 | Rotary vane pump with undervane pumping and an auxiliary outlet A rotary vane pump having a rotatable rotor in an elliptical chamber and a plurality of radially slidable vanes dispersed around the rotor, and having an intake phase and a discharge phase of rotor rotation, wherein liquid is admitted into the pump, press... | 11/27/1984 |
| 4475870 | Hydraulic arrangement A hydraulic arrangement has a housing which includes a first space of a definite first pressure and a second space with a lower second pressure. A primary pump supplies fluid under the first pressure into the first space to open the entrance ports into cy... | 10/09/1984 |
| 4462371 | Fuel pumping apparatus A fuel injection pumping apparatus for supplying fuel to an engine is of the rotary distributor type and has an annular cam ring having cam lobes for imparting inward movement to a pumping plunger. The trailing flanks of the cam lobes define metering port... | 07/31/1984 |
