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| Number | Title | Issue Date |
| 7363913 | High-pressure pump for a fuel injection system of an internal combustion engine A high-pressure pump has at least one pump element, with a pump piston which is guided displaceably in a cylinder bore of a housing part of the high-pressure pump and is driven in a reciprocating motion and defines a pump work chamber in the cylinder bore, into whic... | 04/29/2008 |
| 7354255 | Piston vibratory pump The present invention is an improved vibratory pumping mechanism that increases the efficiency of utilization of the vibratory motion within a mechanism. More specifically, the mechanism includes a central chamber within which a piston is oscillated to draw fluid in... | 04/08/2008 |
| 7309220 | Back pressure apparatus for orbiting vane compressors Disclosed herein is a back pressure apparatus for orbiting vane compressors that is capable of reducing excessive axial force applied to an orbiting vane due to high-pressure refrigerant gas introduced to the lower surface of a vane plate of the orbiting vane. The b... | 12/18/2007 |
| 7182067 | Storage-volume fuel injection system for an internal combustion engine The injection system (1) includes a pump (7) for supplying high-pressure fuel to a storage volume, defined for example by a common rail (6), for supplying a number of injectors (5). The pump (7) has at least one reciprocating pumpi... | 02/27/2007 |
| 7128541 | Oscillating displacement pump An oscillating displacement pump, particularly a diaphragm pump (P) for liquid or gaseous delivery media, having a delivery space which on the one side is delimited by a pump head and on the other side by a delivery element, particularly formed by a diaphragm (6 | 10/31/2006 |
| 7107968 | Control device of high-pressure fuel system of internal combustion engine An engine ECU performs a program including the steps of calculating an amount of the fuel required to be discharged from high-pressure fuel pumps (the required discharge amount), determining whether one high-pressure fuel pump can be stopped, and if not, determining... | 09/19/2006 |
| 7011010 | Free piston device with time varying clearance seal A free piston device which is particularly applicable for use with a linear motor for providing acoustic energy to a cryocooler for generating refrigeration at cryogenic temperatures which comprises a time varying clearance seal to counteract piston drift. ... | 03/14/2006 |
| 6964558 | Compressor utilizing low volt power tapped from high volt power Low voltage electrical power is supplied to a diagnostic control device in a sealed compressor. Electrical power is tapped from a high voltage power line and transformed to low voltage power that in turn operates the diagnostic control device. The diagnostic control... | 11/15/2005 |
| 6904758 | Cryogenic vessel with an ullage space venturi assembly A cryogenic vessel includes a first, outer vessel assembly having an outer vessel and a liquid fill line assembly and a second, ullage space vessel having a bottom and disposed within the first, outer vessel, adjacent to the top of the first, outer vessel. The liqui... | 06/14/2005 |
| 6846166 | Reciprocating diaphragm pump with degassing valves In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive... | 01/25/2005 |
| 6733256 | Device for producing consumables The invention relates to a device for producing consumables, especially filled chocolates that consist of a coated filling. The aim of the invention is to provide a device for feeding substances of the consumables to nozzles in a controlled manner. To this end, the ... | 05/11/2004 |
| 6595758 | Method for conveying damp gases by means of a conveyor device and a conveyor device for carrying out said method The invention relates to a process for conveying damp gases by means of a conveyor device (1) and also relates to a conveyor device (1) for carrying out the process. The conveyor device (1) has at least one feed pump (2) with an oscillating reciprocating ... | 07/22/2003 |
| 6447273 | Variable-delivery high-pressure fuel pump A variable-delivery high-pressure fuel pump having a pump chamber varying in volume as a plunger moves in and out, an inlet port valve forming a part of chamber walls of the pump chamber, the inlet port valve being opened when a low-pressure fuel is admit... | 09/10/2002 |
| 6299417 | Back pressure structure of intermediate pressure of scroll compressor A back pressure structure of a scroll compressor having a fixed scroll forming a plurality of compressive chambers together with an orbiting scroll in its casing; including: a suction pressure space having a predetermined volume formed at one side of the ... | 10/09/2001 |
| 6004105 | Diaphragm pump with adjustable stroke length A fluid powered diaphragm pump with an adjustable stroke is provided. The stroke of the pump is adjusted by providing an inner diaphragm plate assembly that includes a retractable piston. The piston is biased towards the inner plate by one or more standof... | 12/21/1999 |
| 5860798 | Pump for pumping a fluid comprising a liquefied gas and apparatus having a pump The pump has a sleeve-like bearer. This contains a bush in which a piston is displaceable along an axis. The bearer inner surface and the bush outer surface are adjacent to one another in parts and are separated from one another in parts by an intermediat... | 01/19/1999 |
| 5540569 | Multiple-chamber gear pump for ink jet printing Pump heads comprising at least two gear-pump chambers are disclosed. Each chamber comprises a housing which defines a corresponding pump cavity. Each cavity contains a driving gear and at least one driven gear and has a separate inlet and outlet. The pump... | 07/30/1996 |
| 5503537 | Gas compressor The present invention relates to a gas compressor which prevents noise being produced in the suction conduit during idling. In conventional systems, the noise results from the collision of arriving and returning gas by means of a check valve provided betw... | 04/02/1996 |
| 5466131 | Multiple-chamber gear pump with hydraulically connected chambers Pump heads comprising at least two gear-pump chambers are disclosed. Each chamber comprises a housing which defines a corresponding pump cavity. Each cavity contains a driving gear and at least one driven gear and has a separate inlet and outlet. The pump... | 11/14/1995 |
| 5372483 | Axial multi-piston type compressor having rotary valve for introducing fluid from suction chamber into cylinder bores An axial multi-piston type compressor includes: a drive shaft; a cylinder block having cylinder bores surrounding the shaft, a central circular space, and respective radial passages for communicating the bores with the space; pistons slidably received in ... | 12/13/1994 |
| 5295807 | Variable output pump adjustment mechanism An auxiliary chamber is connected to the main pumping chamber of a liquid dispensing pump. The auxiliary chamber includes a resilient rolling diaphragm in fluid communication with the fluid in the main pumping chamber and is expandable for receiving liqui... | 03/22/1994 |
| 5230613 | Common rail fuel injection system A common rail fuel system, primarily including a high-pressure fuel pump, a rail, fuel injection nozzles, and an electronic control system, is disclosed. A substantially constant fuel pressure is maintained within the rail by the fuel pump under the direc... | 07/27/1993 |
| 5222877 | Motor-compressor unit A motor compressor unit comprises a hermetically sealed housing, a vibration motor with a rotationally vibrating drive shaft, and a symmetrical twin free-piston compressor comprising two oppositely disposed identical free pistons which can be reciprocated... | 06/29/1993 |
| 5152677 | Dry-running reciprocating compressor A dry-running reciprocating compressor which has a drive mechanism with a crankcase, in which at least one crankshaft is mounted to rotate in bearings. The drive mechanism is operatively connected with at least one piston-cylinder arrangement of the compr... | 10/06/1992 |
| 5145339 | Pulseless piston pump A multiple piston cylinder reciprocating pump is provided with a cam drive such that the sum of the velocities during the pumping strokes of all of the cylinders is generally constant. The leak free design is provided by utilizing a diaphragm attached to ... | 09/08/1992 |
| 5056991 | Cryogas pump To improve a cryogas pump, in particular a cryogas pump for cryogenic hydrogen fit for use in vehicles, comprising a cylinder housing and a piston which forms with the cylinder housing a first compression space for the cryogenic gas and which is mounted w... | 10/15/1991 |
| 5046929 | Seal compressor A piston-type compressor includes a cylinder having a liner sleeve in which is mounted a reciprocating piston driven by a crankshaft through a connecting rod. The piston forms a dynamic seal with the sleeve with the volume above the piston head defining a... | 09/10/1991 |
| 5017105 | Metering pump A metering pump comprises a diaphragm chamber with a diaphragm, a suction conduit connecting the diaphragm chamber with a metering agent tank, a pump cylinder defining a cylinder space and having an inlet connected to the diaphragm chamber and an outlet c... | 05/21/1991 |
| 4995304 | Extendable cylinders of elastically variable length for use in a pump An extendable cylinder of elastically variable length and substantially invariable circular cross section is combined with another such extendable cylinder or a movable separating organ to form an operating unit. One of the extendable cylinders of the ope... | 02/26/1991 |
| 4966755 | Method and apparatus for fumigation of materials A method and apparatus for treating a material with gas or vapour, especially a fumigant, comprises a sealable enclosure device, a pump which may have an inlet for the agent and a heat reservoir, and a long flexible hose to allow the enclosure to be evacu... | 10/30/1990 |
| 4923373 | Hydraulic single piston pump for manual operation A hydraulic single piston pump for manual operation has a piston (3) with a first channel (14, 20) running from piston chamber (7) to the rod chamber (5). The first channel has a check valve (15-19) opening in the return stroke. The piston (3) also has at... | 05/08/1990 |
| 4911618 | Cryocompressor with a self-centering piston A cryocompressor includes a check valve arranged in a circuit connecting a compression chamber defined by a piston disposed in a cylinder with an annular gap small enough to provide an expected sealing effect to a buffer chamber also defined by the piston... | 03/27/1990 |
| 4911617 | Air pressure circuit An air pressure circuit comprising a compressor cylinder which is divided into two chambers by a slidable piston, a suction port and an exhaust port each, having a valve and mounted on one chamber of the cylinder, inhaling air of a pressure higher than th... | 03/27/1990 |
| 4817390 | Cryogenic compressor A cryogenic compressor wherein a compression space and a buffer space which are partitioned off from each other by means of a reciprocating piston are directly connected together through a passage which is provided with a check valve that allows a gas to ... | 04/04/1989 |
| 4784588 | Plunger pump A plunger pump including an inlet chamber for forwarding a fluid drawn by suction to a pump chamber via a suction valve, and an outlet chamber for receiving from the pump chamber a fluid pressurized in the pump chamber via a discharge valve. The inlet cha... | 11/15/1988 |
| 4739904 | Dispenser pump A dispenser pump has pump chamber (34) whose volume is variable to draw up or discharge material, by the axial movement of a cup (25) on a stationary hollow stem (12). The seal (16) between them slides on an inner wall of the cup. A collector (30) at the ... | 04/26/1988 |
| 4681516 | Leakage preventing liquid supply pump A liquid supply pump adapted for coupling to a reciprocable motor, particularly for pumping liquids having thermosetting properties. The pump incorporates a double-acting piston in a pumping cylinder, driven by an elongated drive shaft which projects from... | 07/21/1987 |
| 4594059 | Diaphragm pump A diaphragm pump for fluids has a housing, a fluid displacement part including a displacement chamber and a pump diaphragm, and a flow control including a damping chamber arranged to absorb pressure impacts a fluid in aspiration region and having an adjus... | 06/10/1986 |
| 4538970 | Downstroke lift pump for wells A reciprocating electric motor-pump assembly for wells lifts well fluid on downstroke of the motor-pump assembly, and with the motor above the pump the well fluid is conducted from below the motor to above the motor via a flow passage through the motor ar... | 09/03/1985 |
| 4492529 | Compressors efficiency improvement The cylinder of a reciprocating compressor is provided with a flanged collar defining an annular recess adjacent the side walls of the cylinder bore disposed for entry of the piston skirt during the downstroke into the recess, compressing gas therein. Com... | 01/08/1985 |
