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| Number | Title | Issue Date |
| 7318422 | Fluid pump assembly A fluid pump includes an electric motor with a casing and a drive shaft extending from the casing, a pumping element coupled to the drive shaft for rotation with the shaft to take in fluid and discharge it under pressure. The fuel pump casing may be sealed and a hou... | 01/15/2008 |
| 7270521 | Variable capacity rotary compressor with pressure adjustment device A variable capacity rotary compressor capable of equalizing an interior pressure (i.e., discharge pressure) of a hermetically sealed container with an interior pressure of a compression chamber where an idling operation is performed, resulting in a reduction of rota... | 09/18/2007 |
| 7229262 | Rotary piston pump end pressure regulation system A rotary piston pump for fluids, wherein the ends of the housing are configured so as to provide reduced pressure differentials between opposite sides of the rotor end disks. ... | 06/12/2007 |
| 7172039 | Down-hole vane motor The present invention generally relates to an apparatus and method for use in a wellbore. In one aspect, a downhole tool for use in a wellbore is provided. The downhole tool includes a housing having a shaped inner bore, a first end and a second end. The downhole to... | 02/06/2007 |
| 7128540 | Refrigeration system having a rotary compressor There is provided a rotary compressor capable of preventing deterioration of performance following plug fixing carried out to prevent falling-off of a spring member. The rotary compressor comprises a cylinder constituting a rotary compression element, a roller engag... | 10/31/2006 |
| 7114932 | Valve-free oxygen concentrator featuring reversible compressors A pivoting vane rotary compressor includes a housing having a generally pear-shaped chamber. A rotor mounted within the chamber defines a main and constricted chamber regions. Reversible intake and exhaust ports alternately introduce air into and exhaust air from th... | 10/03/2006 |
| 6978758 | High Efficiency rotary piston combustion engine A computer controlled rotary piston engine includes a blower housing containing a rotatable impeller assembly, for pushing ambient air into the housing, and forcing the air to pass through a normally open valve mechanism into a combustion chamber. A plurality of fue... | 12/27/2005 |
| 6976832 | Fluid rotary machine A fluid rotary machine (10) includes an inner housing (12) provided with a manifold (68) for directing working fluid through the machine (10) and an outer housing (14) coupled to the inner housing (12) so that the outer hous... | 12/20/2005 |
| 6958058 | Methods and devices for pumping fluid and performing surgical procedures Devices and methods of use of such devices for pumping fluid and for use in surgical procedures preferably include vacuum-driven pumps for providing irrigation and suction functions to the surgical field. Such pumps may be freestanding, external to or integrated int... | 10/25/2005 |
| 6939117 | Rotary apparatus A rotary machine (10) comprises an inner housing (12) having valving means (14) which includes a shaft (15) for directing working fluid through the machine (10) and, an outer housing (16) within which the inner housing resid... | 09/06/2005 |
| 6896502 | Fluid cannon positive displacement pump A positive displacement pump comprising a casing having an interior chamber and an inlet and an outlet oppositely spaced within the chamber. A rotor with a cylindrical outer surface is secured in offset position within the chamber. An end disk is secured to each end... | 05/24/2005 |
| 6883489 | Rotational engine A rotational engine that includes an annular cylinder block having an inner elliptical shape. A circular member having a number of cylinder heads is positioned centrally within the annular cylinder block. Upper and lower cylinder walls are positioned in recesses for... | 04/26/2005 |
| 6857864 | Reversible air motor having three drive chambers An air motor, especially for a screwer, comprises an air rotor which is rotatably supported in a motor cylinder and comprises a plurality of longitudinal slits extending in the longitudinal direction of the rotor for radially guiding lamellae, the air rotor and moto... | 02/22/2005 |
| 6761143 | Coupling structure for expansion unit output shaft and driven-side transmission shaft An expansion unit (4) for converting an expansion energy of pressure-increased steam into a rotation energy of an output shaft, wherein a cover member (26) is provided on the casing outer surface of the expansion unit (4). The cover member (2... | 07/13/2004 |
| 6681738 | Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine Rotary type fluid machine includes a casing 7, a rotor 31 and a plurality of vane-piston units U1-U12 which are disposed in a radiate arrangement on the rotor 31. Each of the vane-piston units U1-U12 has a vane 42 sliding in a rotor chamber 14 and a pisto... | 01/27/2004 |
| 6675765 | Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine Rotary type fluid machine includes a casing 7, a rotor 31 and a plurality of vane-piston units U1-U12 which are disposed in a radiate arrangement on the rotor 31. Each of the vane-piston units U1-U12 has a vane 42 sliding in a rotor chamber 14 and a pisto... | 01/13/2004 |
| 6668786 | Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine Rotary type fluid machine includes a casing 7, a rotor 31 and a plurality of vane-piston units U1-U12 which are disposed in a radiate arrangement on the rotor 31. Each of the vane-piston units U1-U12 has a vane 42 sliding in a rotor chamber 14 and a pisto... | 12/30/2003 |
| 6666670 | Power steering pump A power steering pump for an automotive vehicle includes a housing having an inner wall with an axial groove. A cam plate that defines a cam chamber is received in the housing and includes a rib received in the groove. The groove and rib are disposed near... | 12/23/2003 |
| 6638040 | Dry vacuum pump A dry vacuum pump comprises a scroll-type vacuum pump and a rotary-vane vacuum pump, wherein the rotary-vane vacuum pump is mounted on the side of an inlet, whereas the scroll-type vacuum pump is mounted on the side of an outlet, and then a compound-type ... | 10/28/2003 |
| 6536403 | Direct drive rotary engine A direct-drive rotary engine having a rotor housing, the rotor housing having an interior wall structure which defines an open interior of the engine compartment, including an air intake region, a compression region, a combustion region, an expansion regi... | 03/25/2003 |
| 6513482 | Rotary fluid machinery, vane fluid machinery, and waste heat recovery device of internal combustion engine Rotary type fluid machine includes a casing 7, a rotor 31 and a plurality of vane-piston units U1-U12 which are disposed in a radiate arrangement on the rotor 31. Each of the vane-piston units U1-U12 has a vane 42 sliding in a rotor chamber 14 and a pisto... | 02/04/2003 |
| 6439868 | Rotary engine A rotary engine having end plates attached to a rotor and moving therewith. A rotor has a plurality of blades reciprocally mounted therein and placed within a housing. A chamber is formed between the blades, the rotor, the end plates, and a cylindrical st... | 08/27/2002 |
| 6435852 | Rotary pump A rotary pump includes a casing having a rotator rotatably received therein and a shaft fixedly extends through the rotator. The shaft is located eccentrically in the casing. An inlet and an outlet are defined through the casing and a receiving area is de... | 08/20/2002 |
| 6292970 | Turbine-driven automatic swimming pool cleaners An automatic pool cleaner having a turbine including a housing having a flow chamber and chamber wall with inlet and outlet ports, a rotatably-mounted turbine rotor, and turbine vanes each having a proximal end connected to the rotor and a distal end mova... | 09/25/2001 |
| 6086348 | Fuel injection pump for internal combustion engines A fuel injection pump for internal combustion engines which has an integrated feed pump with an outer ring and an inner ring, the latter being coupled to a drive shaft of the fuel injection pump via a toothing. The individual teeth of this toothing extend... | 07/11/2000 |
| 5984654 | Compressed air driven disposable hand tool having a rotor with radially moving vanes A fluid reaction device (10) is provided having a rotor (90) with vanes (92) pivotably connected thereto. The device (10) includes an entrance (30) for elevated pressure fluid and an outlet (40) for discharge of the fluid after contacting the rotor (90). ... | 11/16/1999 |
| 5876194 | Fixed-displacement vane-type hydraulic machine A fixed displacement vane-type hydraulic machine that includes a cartridge assembly having a rotor, a plurality of vanes carried by the rotor, side plates on opposed sides of the rotor, and a cam ring carried between the side plates surrounding the vanes ... | 03/02/1999 |
| 5758617 | Rotary engine A rotary engine is disclosed having a rotor and rotor housing for mounting therewithin said rotor for its rotation within the inner wall of the rotor housing, the gap between the rotor and the inner wall of the rotor housing defining the engine room. A pl... | 06/02/1998 |
| 5618170 | Rotary motor The present invention discloses a rotary machine, such as a motor or a pump, which works with a fluid in the form of a gas or a liquid. The rotary machine comprises a housing, an annular passageway arranged in the housing, and at least two rotor-driven bl... | 04/08/1997 |
| 5533566 | Constant volume regenerative heat exchanger The purpose of regenerative heat exchangers is to transfer the heat from one step or process of a cycle or system to an earlier step or process in the cycle or system such that the transferred heat is usefully absorbed rather than being discarded. The gas... | 07/09/1996 |
| 5470215 | Wear resistant vane-type fluid power converter A fluid power converter, such as a vane-type hydraulic motor comprising a rotor circumferentially surrounded by a stator, the opposing peripheral surfaces thereof creating an annular space therebetween. The opposing surfaces of the rotor and stator each e... | 11/28/1995 |
| 5359971 | Rotary steam/internal combustion engine and rotary hydraulic motor A self starting, quick start-up rotary steam/internal combustion engine and a rotary hydraulic motor, with a positive displacement, powered through 360° of each revolution and comprising: a flattened cylindrical flywheel with two diametrically opposed, r... | 11/01/1994 |
| 5346234 | Vehicle including an hydraulic drive mechanism An hydraulic drive mechanism for tricycles and the like comprises a variable volume, positive displacement hydraulic pump and a hydraulic motor. The pump is dual chambered with each chamber operating a separate hydraulic system for separate drive wheels. ... | 09/13/1994 |
| 5074769 | Compressor having an orbital rotor with parallel linkage and spring biased vanes A rotary compressor includes a support member for supporting a revolution piston while preventing rotary movement thereof with respect to its axis, and at least two sliding blades provided in the revolution piston. Both blades are biased against a surroun... | 12/24/1991 |
| 4890990 | Rotary internal combustion engine with mutually interengaging rotatable elements A rotary engine in which the expansion pressure of a working gas is converted into a mechanical rotary movement consists of an inner engine element with an outer circumferential surface and an outer engine element which surrounds the inner element and has... | 01/02/1990 |
| 4789145 | Vane spring for air motor A spring for radially biasing a slidable vane in an air motor vane slot includes two torsion coils, an offset base member connecting the coils and curved arm members extending from the coils. The offset base member reduces stress and allows a higher profi... | 12/06/1988 |
| 4772192 | Vane-type compressor A vane-type compressor is disclosed having a rotor that is disposed eccentrially in a housing cylinder. Vane sliders are guided in the rotor so that they deviate by a few angular degrees from the radial direction. Elastic O-rings are provided in end-face ... | 09/20/1988 |
| 4767295 | Deactivating rotor vane kick-out mechanism The invention provides a radial vane motor with springs for forcing the vanes radially outward from the rotor. The rotor is eccentrically mounted within a cylindrical cavity in the motor. The vanes extend radially outward from radial slots in the rotor an... | 08/30/1988 |
| 4762480 | Rotary pump Rotary pump comprising a housing having a bore and a first adjacent lateral side wall having at least one inlet slit and a second adjacent lateral side wall having at least one outlet slit of at least equal size to said inlet slit for flow of medium axial... | 08/09/1988 |
| 4759707 | Press for the preparation of plastic blanks A press for the preparation of raw plastic material blanks is described. It has a feed device connected to a rotor housing in which a circular rotor is eccentrically supported for the generation of pressure and the transport of the material. Rotor housing... | 07/26/1988 |
