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| Number | Title | Issue Date |
| 7993118 | Liquid-cooled rotor assembly for a supercharger A rotor assembly for a supercharger assembly is provided. The rotor assembly includes at least one lobe defining at least one cavity. The at least one cavity is configured to contain a fluid operable to cool the at least one lobe. A supercharger incorporating the ro... | 08/09/2011 |
| 7438541 | Hermetic rotary compressor A hermetic rotary compressor operates two cylinders simultaneously in the regular operation; however it halts operating one of the cylinders when it selects an operation with a half capacity. A vane room of the halted cylinder is air-tightly sealed with respect to l... | 10/21/2008 |
| 7264454 | Rotary combustion engine with an improved inner seal A rotary combustion engine includes a peripheral housing, a front housing plate, a rear housing plate, a piston, and an eccentric shaft, where the piston rotates to form three working spaces separated from each other by the tips of the piston. Shaft seals and piston... | 09/04/2007 |
| 7234924 | Rotary combustion engine with device for conveying lubricating oil A rotary combustion engine with one or more working units, which include a peripheral housing, a front housing plate, a rear housing plate on the output side, an eccentric shaft, and a piston, where the eccentric shaft includes an eccentric, and front and rear seali... | 06/26/2007 |
| 7186099 | Inclined scroll machine having a special oil sump A scroll-type compressor is provided in an inclined or inverted position with an oil sump disposed adjacent to a gas inlet of the scroll wraps to allow droplets of oil to be entrained in the gas being compressed so that the oil droplets in the gas can cool the scrol... | 03/06/2007 |
| 7111606 | Rotary positive displacement device A device to convert energy having exterior and interior rotors where the number of legs (Λ) of an interior rotor divided by the number of chambers (X) defined by the fins of the outer rotor is equal to the effective radius of the inner reference circle ri | 09/26/2006 |
| 7044717 | Lubrication of a hermetic carbon dioxide compressor A hermetic compressor which uses carbon dioxide as the working fluid. The compressor includes a motor and a compression mechanism operatively coupled by a drive shaft supported by a bearing. The drive shaft includes a radially extending bore in fluid communication w... | 05/16/2006 |
| 7008200 | Gerotor apparatus for a quasi-isothermal brayton cycle engine According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control... | 03/07/2006 |
| 6905320 | Scroll-type fluid machine A scroll-type fluid machine such as a scroll compressor or a scroll vacuum pump generates compression heat during compressing operation. A scroll body comprises a stationary scroll and an orbiting scroll that is revolved with respect to the stationary scroll eccentr... | 06/14/2005 |
| 6758660 | Screw vacuum pump with a coolant circuit A screw vacuum pump (1) has shafts (7, 8) and rotors (3, 4) secured to the shafts. Each rotor has a central hollow chamber (31) which receives the shaft or contains in built-in components rotating along with the rotor to define a relative... | 07/06/2004 |
| 6672101 | Electrically driven compressors and methods for circulating lubrication oil through the same An oil storage area (45a) is defined on the bottom of a motor chamber (45) of a scroll compressor (1). An oil transfer route (4a) is defined in the portion of a center housing (4) that corresponds to the storage area (45a). Lubricating oil L is separated ... | 01/06/2004 |
| 6599110 | Scroll-type compressor with lubricant provision A scroll-type compressor having a stationary scroll and a movable scroll is provided. A compression chamber is defined between a stationary scroll and a movable scroll. A refrigerant introducing passage formed in the movable scroll for introducing a refri... | 07/29/2003 |
| 6589026 | Fluid machinery having a helical mechanism with through holes for ventilation A fluid machinery comprises a helical mechanism provided with a cylinder, a roller eccentrically disposed inside the cylinder and formed with a helical groove and a blade member fitted in the helical groove, an electric motor unit connected to the helical... | 07/08/2003 |
| 6544020 | Cooled screw vacuum pump A cooled screw vacuum pump has a housing (4) two rotating systems (5, 6) consisting each of a screw rotor (5) and a shaft (6), a floating device supporting the rotors having, on each shaft, two mutually spaced bearings (7, 8) and an empty space (31) arran... | 04/08/2003 |
| 6530357 | Rotary internal combustion engine The present invention pertains to rotary internal combustion engines and essentially relates to an engine including a body that comprises an inner cylindrical cavity as well as side covers. The cavity comprises a rotor-piston which is concentrically mount... | 03/11/2003 |
| 6497563 | Dry-compressing screw pump having cooling medium through hollow rotor spindles A dry-compressing screw pump in the form of a two-shaft positive displacement pump. A first and a second rotor spindle are disposed parallel to each other. The rotor spindles are hollow. A cooling medium is fed at a first front face of the rotor spindles ... | 12/24/2002 |
| 6488004 | Toroidal internal combustion engine and method for its thermo-stabilization A thermal design and method of operation of a rotary internal combustion engine having at least one housing, a rotor rotating within the housing, and a mechanism for combusting mixture of fuel air and steam supplied into the housing to drive the rotor, in... | 12/03/2002 |
| 6422844 | Screw compressor To prevent a decrease in capacity of a compressor, and to decrease the quantity of oil contained in discharged gas, and to decrease the quantity of oil discharged to an outside of the compressor. In a screw compressor in which a screw rotor is supported b... | 07/23/2002 |
| 6413062 | Pneumatic motor lubrication The invention relates to a pneumatic motor, in which a rotor (16) driven by compressed air rotates in a cylindrical motor sleeve (14). As a replacement for lubrication with compressed operating air containing oil, as, has hitherto been the conventional pr... | 07/02/2002 |
| 6394777 | Cooling gas in a rotary screw type pump A rotary screw type pump is provided with internal cavities within the rotors. The rotors include shaft portions that extend out from the casing that contains the screw portion of the rotors. The cavities extend from the screw portion of the rotors at the... | 05/28/2002 |
| 6283738 | Package-type scroll compressor It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor... | 09/04/2001 |
| 6220841 | Displacement type fluid machine In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers... | 04/24/2001 |
| 6217303 | Displacement fluid machine An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid... | 04/17/2001 |
| 6210137 | Scroll fluid machine A scroll fluid machine having a lubrication pump provided between sliding contact surfaces of an orbiting scroll member and a thrust bearing in a casing. The pump has an orbiting member accommodating recess provided in the sliding contact surface of the t... | 04/03/2001 |
| 6210135 | Internal combustion rotary engine An internal combustion rotary engine includes a stationary, centrally located manifold having an intake and an exhaust port. Inner and outer rotor assemblies are provided which rotate in a common direction about the centrally located manifold. Each of the... | 04/03/2001 |
| 6132195 | Rotary compressor A rotary compressor has a cylinder, a crank shaft having an eccentric part disposed in said cylinder, a bearing which rotatably supports said crank shaft, a roller which moves in said cylinder following said eccentric part, and a vane whose all or part of... | 10/17/2000 |
| 6123529 | Scroll compressor A double scroll compressor including an orbiting scroll having spiral wraps formed on both sides of an end plate includes two stationary scrolls, each having a wrap formed thereon to mesh with the corresponding one of the spirals to form a compressing flo... | 09/26/2000 |
| 6106255 | High efficiency rotary vane motor A rotary vane motor adapted to operate at low rpm with a source of cryogenic pressurized gas. The rotary vane motor includes a housing having a cylindrical opening connected to a primary inlet assembly and an outlet assembly, a first and second end plate ... | 08/22/2000 |
| 6086346 | Cooling system for a rotary vane pumping machine A rotor and stator cooling system for a rotary vane pumping machine having two end plates, a stator assembly, and a rotor. A rotor cooling gas supplied at a cooling gas supply channel in an end plate passes from a radial inner location, along a rotor face... | 07/11/2000 |
| 6045343 | Internally cooling rotary compression equipment A rotary compression equipment includes: a housing having at least two intermeshing hollow rotors rotatably mounted in the housing by two shafts, each rotor formed with a hollow portion for passing a coolant in the hollow portion for cooling the meshing r... | 04/04/2000 |
| 5924855 | Screw compressor with cooling The invention provides a two-rotors screw compressor having active cooling means on the pressure side of the motive rotor.... | 07/20/1999 |
| 5888057 | Scroll-type refrigerant fluid compressor having a lubrication path through the orbiting scroll A scroll-type refrigerant fluid compressor includes a fixed scroll having a first circular end plate from which a first spiral wrap extends, and an orbiting scroll having a second circular end plate from which a second spiral wrap extends. The spiral wrap... | 03/30/1999 |
| 5662463 | Rotary screw compressor having a pressure bearing arrangement A rotary screw compressor that includes a male rotor and a female rotor cooperating together within a casing. The casing has a discharge outlet connected to an outlet port at a high pressure end of the working space and a suction inlet at the low pressure... | 09/02/1997 |
| 5634783 | Guided-vane rotary apparatus with improved vane-guiding means A guided-vane type rotary apparatus including a housing, a rotor rotatably mounted within the housing for rotation about an axis, and vanes associated with the rotor for movement radially with respect thereto between alternative radial positions utilizes ... | 06/03/1997 |
| 5322428 | Gear transfer pump with lubrication and sealing of the driveshaft and idler pin An improved rotary, gear within a gear transfer pump, including a pump housing having a circular pumping chamber communicating with a first port and a second port. An externally driven rotor is in meshing relationship with an internal idler gear. To enabl... | 06/21/1994 |
| 5318425 | Displacement machine according to the spiral principle A displacement machine for compressible mediums exhibits several spiral-shaped convoying spaces (11a, 11b), which are disposed in a stationary housing (7a, 7b). A displacement body (1-4) is assigned to the conveying spaces and is held in such a manner on ... | 06/07/1994 |
| 5217361 | Fluid compressor having lubrication for two spiral blade compression sections A compressor includes a casing having an oil reservoir, a cylinder situated within the casing, a cylindrical rotary body situated eccentrically within the cylinder, the rotary body having first and second spiral grooves extending in opposite directions fr... | 06/08/1993 |
| 5199863 | Sealing of an eccentric bearing of a rotary piston internal combustion engine A rotary piston internal combustion engine of trochoidal type of construction with a piston slidably journalled and controlled via a synchronous transmission gear drive unit. An eccentric bearing of the piston is sealed-off on both sides of the remaining ... | 04/06/1993 |
| 5141423 | Axial flow fluid compressor with oil supply passage through rotor A compressor having a cylinder and a cylindrical rotational body housed within the cylinder. A spiral groove is formed in the outer peripheral surface of the rotational body, and a spiral blade is fitted in the groove so as to be freely retreated in and p... | 08/25/1992 |
| 5127377 | Rotary machine with oval piston in triangular chamber A triangle rotation engine, which comprises an oval rotor repeatedly performing Auto cycle inside a cylinder block, which defines therein three cylinder walls, for driving a crank shaft slidably linked with the oval rotor for an output of power through tw... | 07/07/1992 |
