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| Number | Title | Issue Date |
| 8038416 | Oil pump pressure control device A device including a first discharge passage from a first rotor assembly to an engine, a first return passage that returns to an intake side of the first rotor assembly, a second discharge passage from a second rotor assembly to the engine, a second return passage t... | 10/18/2011 |
| 7942645 | Oil pump assembly An oil pump assembly includes a plurality of pump chambers constituting a plurality of oil pumps, respectively, a plurality of rotors are fitted into the pump chambers, respectively, with a single driving shaft carrying the plurality of rotors to form a single body.... | 05/17/2011 |
| 7704055 | Switching device for a hydraulic high-pressure system The invention relates to a switching device for a hydraulic high-pressure system, particularly for operating hydraulic screw-tightening devices, comprising: a directional seat valve (17), which is subjected to the action of high pressure in the closing direct... | 04/27/2010 |
| 7367790 | Double-acting type orbiting vane compressor The double-acting type orbiting vane compressor comprises an orbiting vane having upper and lower circular vanes formed at the upper and lower surfaces of a vane plate of the orbiting vane, respectively, the orbiting vane being attached to a crankshaft rotatable by ... | 05/06/2008 |
| 7302935 | Method for operating an internal combustion engine, fuel system, and volume flow control valve The invention relates to a method for operating an internal combustion engine comprising a fuel pressure accumulator, in order to provide fuel at a nominal pressure, pressure in a fuel pressure accumulator being generated by means of a high-pressure pump. According ... | 12/04/2007 |
| 7293968 | Capacity-changing unit of orbiting vane compressor Disclosed herein is a capacity-changing unit disposed in an orbiting vane compressor, which compresses refrigerant gas introduced into a cylinder through an orbiting movement of an orbiting vane in the cylinder, for easily changing capacity of the orbiting vane comp... | 11/13/2007 |
| 7290991 | Dual oil supply pump An automotive engine oil pump assembly having first and second pump mechanisms contained within a common housing. A shaft rotatably supported in the housing drives the pump mechanisms in a conventional manner. The pump mechanisms are offset in phase to reduce flow p... | 11/06/2007 |
| 7278833 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, a second compression mechanism, which is driven by a second drive source, and a communication path communicating between a suction chamber of the first compression m... | 10/09/2007 |
| 7270088 | System and method for storage and delivery of a fuel additive to a fuel tank A system for storage and delivery of a fuel additive to a fuel tank includes a reservoir in fluidic communication with a volumetric pump, through a tubular member such as a steel-braided hose. The pump is in further fluidic communication with the fuel return line of... | 09/18/2007 |
| 7234449 | Common fuel rail fuel system for locomotive engine A common rail fuel injection apparatus (1) for a multi-bank, diesel locomotive engine (10). A common rail (20,22) is disposed proximate each bank (20,22) of cylinders (12) of the engine to provide high pressure fuel (30) to ... | 06/26/2007 |
| 7223202 | Hydraulic circuit for torsional damper assembly of an electrically variable transmission The present invention relates to a torsional damper for an electrically variable transmission. The torsional damper is equipped with a hydraulically actuable lock-out clutch to selectively directly couple the engine to the input shaft of the transmission. The electr... | 05/29/2007 |
| 7200934 | Electronic assemblies with high capacity heat sinks and methods of manufacture An electronic assembly comprising one or more high performance integrated circuits includes at least one high capacity heat sink. The heat sink, which comprises a number of fins projecting substantially radially from a core, is structured to capture air from a fan a... | 04/10/2007 |
| 7153106 | Air compressor unit inlet control A portable electric motor driven reciprocating air compressor unit has a compression cylinder having a piston that reciprocates in the cylinder. The piston is driven by an electric motor that is attached to an electrical circuit having a predeterminable current capa... | 12/26/2006 |
| 7128054 | Fuel injection system for an internal combustion engine The fuel injection system has a high-pressure pump, by which fuel is pumped at high pressure into a reservoir. By means of a feed pump, fuel is pumped from a fuel tank to the high-pressure pump. By means of a fuel metering device, disposed between the feed pump and ... | 10/31/2006 |
| 7121813 | Reverse rotation preventing structure of centrifugal compressor The invention relates to a reverse rotation preventing structure of a centrifugal compressor. The reverse rotation preventing structure of the centrifugal compressor comprises: a discharge pipeline of the centrifugal compressor; a suction pipeline of the centrifugal... | 10/17/2006 |
| 7118336 | Pressurized oil supply for propeller engine system A system and method for providing pressurised oil during non-feathered in-flight shutdown conditions in a variable-pitch aircraft propeller engine. A secondary pump provides pressurised oil substantially independent of an engine main oil circuit. ... | 10/10/2006 |
| 7114490 | Multiple pump fuel delivery system A multiple pump fuel delivery system is provided, which in one preferred embodiment includes a tank. Mounted within the tank are multiple fuel pumps. The fuel pumps have intakes connected to filters. One pump may be connected to a fuel only passing filter, and anoth... | 10/03/2006 |
| 7090475 | Hydraulic control circuit for a hydraulic engine with at least two speeds A hydraulic control circuit for a radial piston engine with two speeds. The changeover between the speeds takes place through the alteration of the absorption volume, the delivery side being connected to the discharge side with a bypass connection by a valve arrange... | 08/15/2006 |
| 7090473 | Multiple stage pump with multiple external control valves A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations. ... | 08/15/2006 |
| 7073329 | Multi-stage oil pumping station In a multistage oil pumping system for an oil supply system of a motor vehicle comprising at least two oil pumps arrange axially in side-by-side relationship, each of the oil pumps is connected to a separate drive so that the oil pumps can be operated independently ... | 07/11/2006 |
| 7066157 | Supercharge control apparatus and supercharge control method for supercharged internal combustion engine A detecting device detects boost condition of each of a plurality of superchargers. The detecting device includes at least two of a pressure ratio detecting unit, which detects the ratio of the pressure downstream each supercharger to the pressure upstream each supe... | 06/27/2006 |
| 7048517 | Pump as a pressure source for supercritical fluid chromatography The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprise... | 05/23/2006 |
| 7010393 | Controlling multiple pumps operating in parallel or series Often, an application or process calls for multiple pumps operating within a piping network. Pump load, such as flow rate or pressure, is shared between these multiple pumps. The present disclosure relates to effective means of distributing the pumping load in a man... | 03/07/2006 |
| 6976473 | Fuel injection system for an internal combustion engine The fuel injection system has a high-pressure pump, by which fuel is pumped into a reservoir, with which injectors disposed on cylinders of the engine communicate. A feed pump pumps fuel out of a fuel tank to the high-pressure pump and a fuel metering device trigger... | 12/20/2005 |
| 6970793 | Apparatus and method for detecting malfunctions in high-pressure fluid pumps A fluid pump system includes a pump having a plurality of cylinders, each having an outlet port coupled to a high-pressure manifold. A pressure transducer is coupled to the manifold and configured to convert pressure levels of fluid in the manifold to a voltage sign... | 11/29/2005 |
| 6932583 | Multiple stage pump with multiple external control valves A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage ... | 08/23/2005 |
| 6929064 | Downhole pump There is disclosed an improved pump (5, 5′) particularly suitable for use in a method of “artificial lift” in an oil/gas well. Known pumps used in artificial lift methods suffer from a number of problems/disadvantages—e.g. low efficiency (hydraulic ef... | 08/16/2005 |
| 6869274 | Method of reducing pressure peaks in a fuel injector A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage an... | 03/22/2005 |
| 6755620 | Independent rotational speed control of multi-stage variable speed compressor A multi-stage variable speed compressor includes a pressure detector provided for each compressor on and after the second stage for detecting a discharge pressure of a compressor of a stage preceding the corresponding compressor or a suction pressure of the correspo... | 06/29/2004 |
| 6752600 | Fluid system A fluid system for plural motor driven pumps is disclosed. The fluid system includes a hydraulic motor, a fluid reservoir, and a plurality of fixed displacement pumps. A control valve selectively directs flow of fluid to either a reservoir or the hydraulic motor. A ... | 06/22/2004 |
| 6663350 | Self generating lift cryogenic pump for mobile LNG fuel supply system A high pressure pump and delivery system mating to LNG storage and suited for natural gas powered trucks and buses, but also suitable for other cryogenic liquid fuels. The reciprocating pump is comprised of a liquid pumping portion and a vapor compressing... | 12/16/2003 |
| 6652240 | Method and control system for controlling multiple throttled inlet rotary screw compressors A more efficient compressor control system and a more efficient method of operating a multiple throttled inlet rotary screw compressor system includes the method and control system which are a function of both the actual system pressure and volumetric flo... | 11/25/2003 |
| 6638031 | Heating system for motor vehicles including multi-function pump with axially displaceable impeller The invention relates to a heating system, particularly for motor vehicles, in which a heat exchange arrangement operating in the manner of a heating member can be thermally coupled by means of a hydraulic heat transfer circuit, particularly a water circu... | 10/28/2003 |
| 6602057 | Management and optimization of load sharing between multiple compressor trains for controlling a main process gas variable A control system is provided for load sharing between a plurality of compressors. The control system determines the actual coefficients of export flow for the compressors, compares the actual coefficients of export flow with a common or individual coeffic... | 08/05/2003 |
| 6592191 | Pump equipment and method for assembling same In a pump equipment having one or more rotary pumps for hydraulic circuit, the intake port is communicated with the shaft hole for inserting the drive shaft and fluid flows through the shaft hole to a fluid groove provided in inner surfaces of the pump ro... | 07/15/2003 |
| 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 |
| 6516249 | Fluid control system with autonomously controlled pump A plurality of autonomously controlled valves and pumps in a fluid distribution system are interconnected by a data communication network. The system also includes fluid flow sensors which report to the system by way of the network. The autonomous control... | 02/04/2003 |
| 6499504 | Control system for controlling multiple compressors The present invention is a more efficient compressor control system and a more efficient method of operating a multiple compressor system because the method and control system are a function of both the system pressure and the volumetric flow rate capacit... | 12/31/2002 |
| 6471486 | Compressor system and method and control for same An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and temperature sensors to detect actual shutdown conditions or... | 10/29/2002 |
