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| Number | Title | Issue Date |
| 7341438 | Scroll-type fluid machine including passage formed in movable scroll A fluid machine includes a stationary scroll member and a movable scroll member. A second tooth portion of the movable scroll member is arranged to be revolved with respect to a first tooth portion of the stationary scroll member and to form an operating chamber bet... | 03/11/2008 |
| 7338267 | Hinged paddle pump A rotary pump for fluids comprising a shaft to rotate about a longitudinal axis and a cylindrical rotor centrally secured to that shaft. A housing encasing the shaft and rotor includes, interior end walls adjacent to the rotor disks and an interior side wall. Fluid ... | 03/04/2008 |
| 7284495 | Shaftless radial vane rotary device and a marine propulsion system using the device A radial vane fluid motor or pump has an open ended tubular rotor having a cylindrical outer surface rotatably mounted in a tubular stator having its inner surface contoured to provide successive portions of increased and decreased spacing relative to the rotor body... | 10/23/2007 |
| 7182157 | Enlarging well bores having tubing therein An underreamer for forming a cavity within a well bore includes a fluid motor having a first body and a second body arranged about a longitudinal axis. The first body is adapted to rotate about the longitudinal axis in relation to the second body when fluid is passe... | 02/27/2007 |
| 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 |
| 6945755 | Fluid controlled pumping system and method A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. ... | 09/20/2005 |
| 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 |
| 6824369 | Rotary variable expansible chamber-kinetic hybrid pump This invention concerns pumping fluids to both high pressures and high flow rates and thus has a very high power density. The technology pertains to both fluid power and to fluid transfer and is adaptable to a wide scope of use. The concept is a very simple rotary v... | 11/30/2004 |
| 6746223 | Orbiting rotary compressor An orbiting rotary compressor assembly having a compression mechanism disposed in a housing and including relatively moving fixed and orbiting compression members including extending portions having surfaces engaged with each other and between which a compression ch... | 06/08/2004 |
| 6712589 | Scroll compressors Scroll compressors (1) may include a housing (2, 3) having an inlet port (3a) and an outlet port (3b). A drive scroll (10) may be rotatably disposed within the housing and may have a rotational axis. A driven scroll (... | 03/30/2004 |
| 6640910 | Long gauge roller vane drilling motor A system for downhole drilling and coring includes a roller vane motor for driving a drill bit. The motor has a single jacket with a lower end and an upper end and being embodied such that all drilling fluid passes inside the jacket to the drill bit. The ... | 11/04/2003 |
| 6616430 | Scroll compressors Scroll compressors (1) may include a housing (2, 3) having an inlet port (3a) and an outlet port (3b). A drive scroll (10) may be rotatably disposed within the housing and may have a rotational axis. A driven scroll (20) may be rotatably disposed within t... | 09/09/2003 |
| 6568928 | Scroll-type compressor A scroll-type compressor has a fixed scroll member, a movable scroll member, a front housing, a rear housing and a gasket seal. The fixed scroll member and the movable scroll member cooperate to form a compression region. The movable scroll member orbits ... | 05/27/2003 |
| 6561777 | Downhole roller vane motor and roller vane pump A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains wing deflector cams that divide the space between the housing and the rotor into a high-pressure chamber and a low-pressure chamber. The housing at one of its ... | 05/13/2003 |
| 6558143 | Scroll compressors Scroll compressors may include a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft, a bearing member coupled to the crank shaft and a movable scroll coupled to the crank shaft. The movable scroll is typically disposed adjacent to ... | 05/06/2003 |
| 6544016 | Scroll compressors Scroll compressors may preferably include, for example, a stationary scroll, a drive shaft member, a movable scroll, a bearing member, a compression chamber, a discharge port, a discharge valve and a discharge valve clamping device. The drive shaft member... | 04/08/2003 |
| 6514060 | Scroll type compressor having a pressure chamber opposite a discharge port Spiral fixed scroll teeth (2a) project from an end plate (2b) of a fixed scroll (2), and spiral movable scroll teeth (4a) project from an end plate (4b) of a movable scroll (4). The end plate (4b) of the movable scroll (4) is provided with a discharge por... | 02/04/2003 |
| 6506036 | Scroll compressors Scroll compressors may preferably include a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft and a bush coupled to the outer surface of the crank shaft. A seal is preferably disposed between the bush and the crank shaft and the s... | 01/14/2003 |
| 6499976 | Downhole roller vane motor A roller vane motor having a housing and a stator positioned on an inside surface of the housing. The stator has an internal wall with an inlet port and an outlet port and the portion of this internal wall at the outlet port tapers open at an angle of les... | 12/31/2002 |
| 6464481 | Scroll compressors Scroll compressor may include, for example, a stationary scroll, a drive shaft, a crank shaft coupled to the drive shaft, a bush coupled to the outer surface of the crank shaft and a movable scroll coupled to the crank shaft. The movable scroll is prefera... | 10/15/2002 |
| 6461120 | Sealed-type electric compressor having refrigerant passage A refrigerant passage within a main shaft includes an axial refrigerant passage extending in parallel with the main shaft from the end surface thereof, and a radial refrigerant passage communicating with the axial refrigerant passage and extending radiall... | 10/08/2002 |
| 6454551 | Seal structure in a scroll type compressor The pressure leakage from the back pressure chamber installed at the back side of the movable scroll to the low pressure area can be prevented. An eccentric shaft (17) formed integrally to a drive shaft (14) is inserted into a bushing (19). A balance weig... | 09/24/2002 |
| 6302666 | Downhole roller vane motor A roller vane motor for downhole drilling comprises a housing (1) and a rotor (2). The housing contains wing deflector cams (5) that divide the space between housing and rotor into chambers (8a, b). The rotor is equipped with cylindrical rollers (7) in re... | 10/16/2001 |
| 6267572 | Scroll fluid machine having scroll members at each end of a rotating hollow shaft A scroll fluid machine requiring no crank shaft to orbitably support an orbiting scroll member and capable of being reduced in overall size in the axial direction. In a casing, two fixed scroll members are provided on the axis of the casing, and an electr... | 07/31/2001 |
| 6190149 | Vacuum pump oil distribution system with integral oil pump An oil distribution system for machinery such as a vacuum pump is disclosed. The system features an auxiliary oil pump integrally mounted adjacent to one end of the vacuum pump's drive shaft. The drive shaft drives the oil pump and has a longitudinal pass... | 02/20/2001 |
| 6142758 | Rotary positive displacement engine A rotary positive displacement engine includes one or more power rotors, which are acted upon by a pressurized charge of gas, such as steam, and an annular barrier rotor geared for synchronous rotation with the power rotors. The rotors rotate within inter... | 11/07/2000 |
| 6135738 | Scroll compressor having a discharge port in the moveable scroll In a scroll compressor (A) configured such that an oil is supplied to a compression chamber (14) between fixed and movable scrolls (10), (11) and to bearings (28), (29) for a crank shaft (8), an electric motor (7) and an oil reservoir 1a are placed in a d... | 10/24/2000 |
| 6106258 | High-pressure dome type compressor capable of preventing oil discharge due to gas and of cooling oil by discharge gas A high-pressure dome type compressor is capable of successfully cooling oil fed to sliding portions during a passage of oil in a drive shaft by discharge gas without causing the oil to be discharged along with the gas. In the drive shaft of a motor dispos... | 08/22/2000 |
| 6079386 | Rotary machine A rotary machine has two rotors (16,18) mounted for rotation on parallel axes, each in one of two intersecting cylindrical chambers (12,14). The rotor (16) has a hub (24) and a flap (26) extending radially from the hub into close proximity with, but not i... | 06/27/2000 |
| 6050793 | Scroll type fluid displacement machine The machine includes a fixed disk (2) comprising a spiral wall (3), a mobile disk (4) also comprising a spiral wall (5) cooperating with that of the fixed disk, and means (11, 16, 22, 23) for driving circular translation movement of the mobile disk, the m... | 04/18/2000 |
| 5964584 | Vane pump having a shaftless balanced rotor In order to provide, in vane pumps, an effective compensation of the radial and axial forces while at the same time increasing their useful service life, the vane pump for liquids is comprised of a slotted rotor (1) supported in a stator (4), wherein radi... | 10/12/1999 |
| 5961306 | Rotating scroll compressor having main and auxiliary rotating shaft portions A rotating type scroll compressor according to the present invention having a closed shell that houses an electric drive member and a scroll compressing member, the scroll compressing member having a drive scroll member having a drive scroll member and a ... | 10/05/1999 |
| 5938419 | Scroll fluid apparatus having an intermediate seal member with a compressed fluid passage therein A scroll mounting member for mounting a drive scroll therein is secured to a left end of a drive shaft coupled to a motor. A rotary bearing is fitted on the outer periphery of the scroll mounting member, and its outer periphery is secured to a scroll hous... | 08/17/1999 |
| 5833444 | Fluid driven motors There is disclosed a fluid driven motor of particular use, for example, in drilling apparatus or in powering underwater excavation apparatus. Known motors suffer from a number of problems, e.g. lack of sufficient hydraulic efficiency. According to one asp... | 11/10/1998 |
| 5803722 | Rotating scroll compressor having a movable bearing member A rotating type scroll compressor according to the present invention having a closed shell that houses an electric drive member and a scroll compressing member, the scroll compressing member having a drive scroll member having a drive scroll member and a ... | 09/08/1998 |
| 5785509 | Wellbore motor system A drilling motor has been developed with a hollow tubular stator having at least one rod recess therein and an inlet port therethrough corresponding to each of the at least one rod recess; a rod movably disposed in each of the at least one rod recess; a t... | 07/28/1998 |
| 5733113 | Downhole roller vane motor and roller vane pump A roller vane motor for downhole drilling comprises a housing and a rotor. The housing contains outlet ports and wing deflector cams that divide the space between housing and rotor into chambers. The rotor is provided with recesses in its periphery and th... | 03/31/1998 |
| 5683236 | Anti-reverse rotation valve for scroll compressor A scroll-type refrigeration compressor has a gas-liquid mixture discharge passage extending through the driver scroll drive shaft for discharging refrigerant gas and entrained lubricant into a high pressure chamber in the compressor housing. An anti-rever... | 11/04/1997 |
| 5616019 | Rolling piston type expansion machine A rolling piston type expansion machine eliminates the need for an open-close valve mechanism and smoothens the timing of inflow of high-pressure gas. The machine includes a cylinder having a discharge port and a roller freely gyratable or orbital in the ... | 04/01/1997 |
| 5558512 | Fluid compressor with vertical longitudinal axis A fluid compressor includes a piston which has a vertical longitudinal axis. A plurality of working chambers are provided between a cylinder and the piston, and are constituted by upper working chambers and lower working chambers which separated from each... | 09/24/1996 |
