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| Number | Title | Issue Date |
| 8128377 | Split-pressure dual pump hydraulic fluid supply system for a multi-speed transmission and method A split-pressure, dual-pump system for supplying hydraulic fluid to a multi-speed transmission is provided. The system includes a low-pressure work circuit operatively connected to a fixed displacement pump, and a high-pressure work circuit operatively connected to ... | 03/06/2012 |
| 8123492 | Speed-related control mechanism for a pump and control method A pump system includes a fixed or variable capacity pump and a speed-related control mechanism to alter the capacity of a variable capacity pump or to alter the relief pressure of a fixed capacity pump in response to changes in the operating speed of the pump. A pre... | 02/28/2012 |
| 7331482 | Dispense pump with heated pump housing and heated material reservoir A heated dispense pump overcomes the limitations of conventional systems providing for reliable and efficient heating of the dispensed material in a system that is compact, lightweight, and accurate. A pump housing and cartridge body are formed of a thermally conduc... | 02/19/2008 |
| 7322800 | System and method of providing hydraulic pressure for mechanical work from an engine lubricating system The method provides hydraulic pressure for mechanical work from an engine lubricating system in an internal combustion engine by supplying oil to an engine lubrication gallery for lubricating the engine and to at least one variable oil demand accessory. Each of the ... | 01/29/2008 |
| 7171887 | Regulating device for hydrostatic piston machines The invention relates to a regulating device for hydrostatic piston machines consisting of an actuating piston (2) which can be removed between two end positions which can be impinged upon by actuating pressure exerted thereon in an opposite direction. An act... | 02/06/2007 |
| 7165396 | Pump control override for tandem pumps A tandem pump assembly of the type including a housing (H), disposed in which is a first pump (11), driven by an input shaft (19), and a second pump (33), also driven by the input shaft (19). The assembly is characterized by the tandem pu... | 01/23/2007 |
| 7142967 | Features of main control computer for a power machine The present invention is directed to a computer based control system for controlling hydraulic and electromechanical actuators on a power machine, such as a skid steer loader. The computer based control system is configured to implement a number of features to enhan... | 11/28/2006 |
| 7137789 | Vent for reducing seal pressure in pump assembly An engine pump is provided which operates with an internal combustion engine or as a supplemental pump or as used in a stand alone device, and includes an internal vent for improved pump and motor durability. The pump is operably and sealably connected to a motor an... | 11/21/2006 |
| 7121188 | Axial piston machine having a device for the electrically proportional adjustment of its volumetric displacement An axial piston machine having a swash plate or oblique axis which can be adjusted by means of servopistons and has a valve segment and an adjustment unit for the electrically proportional adjustment of the volumetric displacement, the adjustment unit comprising pro... | 10/17/2006 |
| 7048515 | Hydraulic drive system and method using a fuel injection control unit A fuel injection control unit, including an electronic governor and a controller for an engine performs control in a governor region based on an isochronous characteristic. A working machine controller receives a delivery pressure signal P and controls a regulator s... | 05/23/2006 |
| 7044442 | Valve block for a control device, particularly for a hydrostatic machine The invention relates to a valve block (1) for a control device comprising a valve (9) whose valve piston (14) is subjected to the action of a control pressure when in its open position and to the action of a return spring (15) when in it... | 05/16/2006 |
| 7021902 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, and a second compression mechanism, which is driven by a second drive source. A first discharge port of the first compression mechanism and a second discharge port o... | 04/04/2006 |
| 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 |
| 6997685 | Hydraulic system comprising a main pump and a precompression pump The invention relates to a hydraulic system (1) comprising a main pump (12) and a precompression pump (5), whereby the outlet (8) of the precompression pump (5) is connected by a connecting line (9) to the inlet (11) ... | 02/14/2006 |
| 6973921 | Fuel pumping system and method A fuel pumping system that includes a pump drive is provided. A first pumping element is operatively connected to the pump drive and is operable to generate a first flow of pressurized fuel. A second pumping element is operatively connected to the pump drive and is ... | 12/13/2005 |
| 6957783 | Dispense tip with vented outlets In a fluid pump and cartridge assembly, a cartridge includes a material inlet port, a material outlet port, and a feed screw. The feed screw delivers fluid to be dispensed from the fluid inlet to the outlet port. The fluid inlet is preferably elongated in a directio... | 10/25/2005 |
| 6913447 | Metering pump with varying piston cylinders, and with independently adjustable piston strokes A metering pump includes an actuating mechanism, and a plurality of piston cylinders coupled to the actuating mechanism. A first of the cylinders has a working volume that differs from a second of the cylinders. The actuating member is centrally located and the cyli... | 07/05/2005 |
| 6846165 | Hydrostatic machine The invention relates to a hydrostatic machine (1) comprising at least one first hydrostatic unit (E1) and one second hydrostatic unit (E2), each hydrostatic unit (E1, E2) comprising respective pistons (14a, 14... | 01/25/2005 |
| 6790013 | Variable displacement vane pump with variable target regulator A variable displacement vane-type fluid pump is provided which permits improved regulation of the pump discharge such that the pump can meet the various requirements of lubrication for internal combustion engines at all speeds with minimized use of power. Of course,... | 09/14/2004 |
| 6783331 | System and method of multiple-phase pumping A pump system for multi-phase fluids that includes a drive-shaft (11), mechanical differential units (12, 22, 23, 23′, D1 . . . Dn) and pumps (14, 14′, 25, 25′, 25″, 25′″, B1 . . . Bn) wher... | 08/31/2004 |
| 6763808 | Fuel pump and fuel feeding device using the fuel pump A fuel injection pump includes a plurality of plungers and a cam shaft having a plurality of drive cams (31, 32) corresponding to the plungers. The cam shaft is rotated by a power from the outside so as to reciprocate the plurality of plungers by the correspo... | 07/20/2004 |
| 6579070 | Pump assembly comprising two hydraulic pumps A pump assembly which comprises a vane pump and a second hydraulic pump driven together with this vane pump. The vane pump has a suction region in which first pressure spaces between the vanes and second, rear pressure spaces behind the vanes become large... | 06/17/2003 |
| 6575709 | Pumps A pump system is provided where low pressure (4) and high pressure (6) pumps are coaxially mounted to receive motive power from a shared drive (300). The drive shafts are arranged such that one extends within a void in the other and both have shear region... | 06/10/2003 |
| 6498973 | Flow control for electro-hydraulic systems In a work vehicle that has several hydraulic actuators a system and method for controlling and scaling flow between the actuators includes an electronic controller that is connected to several hand controls that provide a proportional signal indicating ho... | 12/24/2002 |
| 6453585 | Hydraulic drive device of working machine To permit forcedly stopping combining flows of pressure fluid from two hydraulic pumps when a load pressure on a combined-flow-driven actuator in which the flows of pressure fluid are combined together exceeds a predetermined pressure and hence to permit ... | 09/24/2002 |
| 6364623 | Bubble detection and recovery in a liquid pumping system A serial, dual piston high pressure fluid pumping system that overcomes the difficulties of gas in the fluid stream without the need for added mechanical valves or fluid paths. A bubble detection and recovery mechanism monitors compression and decompressi... | 04/02/2002 |
| 6299766 | Reverse osmosis filtering apparatus with concentrate dilution Liquid filtering apparatus includes a plurality of reverse osmosis filters for receiving seriatim under pressure a mixture of feed liquid and recirculated concentrate. Feed liquid such as salt water is introduced into the inlet of each reverse osmosis fil... | 10/09/2001 |
| 6287083 | Compressed air production facility A compressed air production facility includes at least one variable speed compressor and a plurality of constant speed compressor, which are connected in parallel with one another. The variable speed compressor and the plurality of constant speed compress... | 09/11/2001 |
| 6162023 | Reciprocating cam actuation mechanism for a pump A multi-pump controlling means and method controls and drives two or more reciprocating pumps creating proportioned flows of fluids. The multi-pump controlling means in use is situated between a driving means, such as a double acting ram, and the pumps. T... | 12/19/2000 |
| 6126404 | Apparatus for the metered delivery of fluids A metering apparatus for delivery of a metered amount of fluid includes an axial piston pump and a rotary drive having an output, a coupling for connecting the rotary drive output to a piston of the axial piston pump wherein said piston is cardanically co... | 10/03/2000 |
| 6106238 | Bubble detection and recovery in a liquid pumping system A serial, dual piston high pressure fluid pumping system that overcomes the difficulties of gas in the fluid stream without the need for added mechanical valves or fluid paths. A bubble detection and recovery mechanism monitors compression and decompressi... | 08/22/2000 |
| 6048177 | Output regulation with load sensing The invention relates to a device for the output regulation of at least one variable displacement pump (1), delivering into a working line, driven by a motor, through adjustment of its displacement by means of a setting device (7) biased in the direction ... | 04/11/2000 |
| 6030185 | Radial piston pump The present invention relates to a pump, more particularly a radial piston pump, including at least two pump pistons (10) with an associated working chamber (13) each, wherein the working chambers (13) are connected to suction lines (4) by way of suction ... | 02/29/2000 |
| 5913663 | Device for regulating the total power of at least two variable displacement hydrostatic pumps A total power regulation device for a plurality of variable displacement pumps (1, 2), each having a regulation valve (18) which regulates its displacement volume, which is acted upon--against a counter-pressure--by a control pressure corresponding to the... | 06/22/1999 |
| 5823747 | Bubble detection and recovery in a liquid pumping system A serial, dual piston high pressure fluid pumping system that overcomes the difficulties of gas in the fluid stream without the need for added mechanical valves or fluid paths. A bubble detection and recovery mechanism monitors compression and decompressi... | 10/20/1998 |
| 5527156 | Apparatus for and method of controlling engine and pumps of hydraulic construction equipment An apparatus for and a method of controlling the engine and pumps of hydraulic construction equipment capable of achieving automation of the hydraulic construction equipment by controlling the oil quantity fed to solenoid controlled proportional valves su... | 06/18/1996 |
| 5482441 | Liquid flow control system Apparatus for controlling flow of a liquid includes a variable displacement liquid pump and a variable displacement liquid meter, the pump and meter being driven by the same drive motor. Containment structure defines a liquid flow path between the pump an... | 01/09/1996 |
| 5333997 | Device for the power control of at least two hydrostatic variable displacement pumps The invention relates to a power control device for two variable displacement pumps, each with an adjusting device which can be acted upon by adjusting pressure, a power control valve associated therewith, which is acted upon by a first control pressure c... | 08/02/1994 |
| 5290153 | Two stage pump assembly A two stage main pump has a first pump drivingly connected to a transmission input shaft, and a second pump is drivingly connected to the output member of a friction clutch that is spring applied and pressure released. The input member of the clutch is dr... | 03/01/1994 |
| 5201174 | Auxiliary hydraulic pump system An engine-driven pump supplies pressurized hydraulic fluid to vehicle brake and steering circuits. A ground driven variable displacement pump controlled by a control circuit is de-stroked when the engine-driven pump is operational. The variable displaceme... | 04/13/1993 |
