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| Number | Title | Issue Date |
| 8011904 | Gas feed assembly A gas feed assembly (30) comprises a compressor arrangement (32) comprising first and second compressor (34, 36). The gas feed assembly includes an outlet (42) for gas for the first and second compressors (34, 36). The gas feed ass... | 09/06/2011 |
| 7785083 | Dynamic fluid device The dynamic fluid device has a first pumping arrangement and second pumping arrangement arranged in parallel with each other to pump a pressurized fluid to user devices; at least a distributor member interposed amongst the first pumping arrangement, second pumping a... | 08/31/2010 |
| 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 |
| 7114928 | High-pressure fuel pump and assembly structure of high-pressure pump A high pressure pump for decreasing an initial axial force of a clamping bolt and preventing distortion of a sealing surface and a cylinder form. The high pressure pump has an intermediate member including a cylinder body. The cylinder body has a pressurizing chambe... | 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 |
| 7021075 | Electric-powered compressor An electric-powered compressor comprised of a compression mechanism 110 for sucking in and compressing a refrigerant and an electric motor 120 for driving the compression mechanism formed integrally and provided at a refrigerant suction side of the com... | 04/04/2006 |
| 6712591 | Discharge valve of a hermetic compressor using stopper and weight driven disc valve A discharge valve of a hermetic compressor includes a valve plate disposed on a cylinder head that draws in and discharges refrigerant according to reciprocal movement of a piston, and the discharge valve having a discharge hole formed therein through which refriger... | 03/30/2004 |
| 6483216 | Damper system and bearing centering device for magnetic bearing vacuum pump In a vacuum pump according to the invention, the rotor is held inside the stator by radial magnetic bearings, and its radial movements are limited by one or more landing mechanical bearings each made up of a rotor rolling bearing race and a stator rolling... | 11/19/2002 |
| 6471477 | Jet actuators for aerodynamic surfaces A jet actuator positioned within a hollow space in an aerodynamic structure for controlling the flow over an aerodynamic surface thereof includes a movable member linearly displaced by a voice coil mechanism and a flexible diaphragm defining a compression... | 10/29/2002 |
| 6206651 | Oil pump for an internal combustion engine having toothed wheels The invention relates to an oil pump for an internal combustion engine with at least one pair of toothed wheels which are in mutual engagement, at least one intake port and at least one outlet port. An improved supply of oil at reduced driving power can b... | 03/27/2001 |
| 6183207 | Digital pump A pump which can operate in a number of different modes, wherein each mode corresponds to a different output of the pump. The pump may have a plurality of pump chambers located within a pump housing. The pump chambers may be arranged in fluid communicatio... | 02/06/2001 |
| 6045334 | Valve disabler for use in high pressure pipe cleaning applications A valve disabler for use in high pressure pipe cleaning systems. The valve disabler of the present invention serves to disable a single cylinder in a multi-cylinder plunger pump so as to generate pulsatile pressure surges within a hose member. The pulsati... | 04/04/2000 |
| 6042348 | Protective shutter assembly for a forced air cooling system A protective shutter assembly for a fan of a forced air cooling system includes lightweight shutter members mounted for pivoting motion about vertical axes. When the fan is operative, its shutter members are pivoted in a first direction to expose the fan ... | 03/28/2000 |
| 5954484 | Sewage lifting station A sewage lifting station having at least two solid waste collection chambers for receiving pumped solid waste-contaminated sewage. The station has a collection tank for receiving pre-treated waste water flowing from the solid waste collection chambers via... | 09/21/1999 |
| 5775880 | Valve disabler for use in high pressure pipe cleaning systems A valve disabler for use in high pressure pipe cleaning systems. The valve disabler of the present invention serves to disable a single cylinder in a multi-cylinder plunger pump so as to generate pulsatile pressure surges within a hose member. The pulsati... | 07/07/1998 |
| 5364240 | Fluid pump with pulsing feature A fluid pump having a casing defining a fluid inlet a fluid outlet and first and second cylinders, a first piston mounted to the casing for movement in first and second directions with the first piston causing fluid in the inlet to be drawn into the first... | 11/15/1994 |
| 5289681 | Power steering system An oil pump which delivers an operating oil to a power steering mechanism of vehicle is designed to reduce the power which is wasted during a high speed operation. A subpump of a reduced capacity having a number of revolutions which varies with a vehicle ... | 03/01/1994 |
| 5178520 | Double centrifugal pump with single casing and adapter insert A centrifugal or rotary double pump has a singular circular casing surmounting two motors driving individual rotors within the casing. Above a flat side of the casing is attachable to the device serviced by the double pump and receives an insert defining ... | 01/12/1993 |
| 5167493 | Positive-displacement type pump system A positive-displacement type pump system, such as a fixed-cylinder type radial piston pump system, includes a common pump housing formed with a plurality of cylinders, and a plurality of pistons slidably received in the respective cylinders and cooperatin... | 12/01/1992 |
| 5147154 | Pressure regulation apparatus including cooperating valve member and air dam means A pressure regulation apparatus, for a bi-directional pneumatic transportation system, has first, second, and third flow chambers with ports provided at two of the chambers. A pumping device alternatively pumps air from the chamber lacking a port to eithe... | 09/15/1992 |
| 5094597 | Variable discharge pump A variable discharge pump comprises a plurality of pumping units, each pumping unit including an outlet port discharging a particular volumetric discharge of working fluid, a plurality of outlet passages respectively communicating the outlet ports of each... | 03/10/1992 |
| 5050233 | Rotary compressor A rotary compressor includes first and second compressor sections, and a motor for driving the compressor sections. The first and second compressor sections have first and second cylinders, respectively, and each cylinders has a suction port. First and se... | 09/17/1991 |
| 5004155 | Agricultural sprayer An agricultural sprayer of the injection type has a charging circuit for generating a pressurized circulating flow of fluid additive. This is supplied to the inlet of a metering pump of the variable stroke piston type. This allows the pump to operate at o... | 04/02/1991 |
| 4801253 | Oil pump Instead of a hand-operated oil pump for supplying extra oil to the chain of a motor saw, two pumps according to the invention are disposed on the same shaft. The first one works always, while the second one can be switched on and off. The switching is eff... | 01/31/1989 |
| 4787822 | Volume control for multi-nozzle rotary pump filling systems A volume control for a multi-nozzle rotary pump filling system in which a plurality of rotary pumps are driven from a common drive. Each pump is connected with its own nozzle by way of a connection that includes a volume control operable to adjust the bac... | 11/29/1988 |
| 4741674 | Manifold arrangement for isolating a non-operating compressor In a system with parallel connected compressors, a suction and discharge manifold arrangement for isolating an inactive compressor from the rest of the operating system. A check valve in the discharge line of the compressor prevents fluid flow back into t... | 05/03/1988 |
| 4725204 | Vacuum manifold pumping system Vacuum pumping system comprises a plurality of vacuum processing vessels, semiconductor processing reactors, and the like, connected to a common manifold evacuated by a generously large central vacuum unit. The manifold is maintained at a substantially co... | 02/16/1988 |
| 4527959 | Drilling fluid pump providing a uniform, controlled pressure and flow rate A pump is provided for circulating drilling fluid and the like into a well during a well drilling process. The pump comprises a pair of double-ended piston assemblies hydraulically reciprocated in opposite directions by a common hydraulic drive arrangemen... | 07/09/1985 |
| 4411141 | Parallel operation compressor type refrigerating apparatus A parallel operation compressor type refrigerating apparatus is disclosed which has first and second compressors connected in parallel with each other by a pipe, each having the inside of its crankcase separated into a motor chamber and a compressing elem... | 10/25/1983 |
| 4179248 | Oil equalization system for parallel connected hermetic helical screw compressor units A pair of helical screw rotary hermetic compressor units are connected in parallel across common suction and discharge manifolds. The discharge manifolds open to each unit casing well above the level of accumulated oil within the bottom of the hermetic ca... | 12/18/1979 |
| 4140437 | Apparatus for the long distance conveying of liquids mixed with solid substances using a compressed air pump An apparatus for conveying liquids mixed with solid substances to a distance is disclosed, comprising a compressed air pump formed by two or more cylindrical chambers, each provided with an inlet valve for the liquid and with a connection for the inlet an... | 02/20/1979 |
| 4097198 | Internal combustion assisted hydraulic engine This hydraulic engine utilizes two sets of hydraulic cylinders connected to a shaft so as to be alternately pressurized as the shaft is reciprocally driven by a pair of conventional internal combustion chambers. The outlets of all hydraulic cylinders are ... | 06/27/1978 |
