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| Number | Title | Issue Date |
| 7438543 | Oscillating slide machine The invention relates to an oscillating slide machine working on an eccentric circulatory motion, whereby the oscillation guide grooves (19) on the inner rotor (5) are provided with groove front edges (20) and groove rear edges (21) of di... | 10/21/2008 |
| 7344367 | Rotary compressor having a discharge valve A rotary compressor having a housing, a rotor positioned within the housing defining a compression chamber, the rotor rotatable about an axis of rotation, a discharge port in the rotor in fluid communication with the compression chamber, and a valve assembly mounted... | 03/18/2008 |
| 7217110 | Compact rotary compressor with carbon dioxide as working fluid A rotary compressor for compressing a working fluid includes a housing having an oil sump. A stationary shaft extends into the housing and includes a longitudinal passage. The longitudinal passage has an oil inlet in fluid communication with the oil sump. A working ... | 05/15/2007 |
| 6890164 | Internal gear pump A noise-reduced internal gear pump incorporating an inner rotor having an addendum formed by a smooth curve and a dedendum formed by a hypocycloid. The tooth profile of the outer rotor is determined by the following steps. The center Oi of an inner rotor 1 is... | 05/10/2005 |
| 6881041 | Compressor within motor rotor A compressor comprises a sealed chamber to which a suction pipe and a discharge pipe are communicated, a motor unit fixed in the sealed chamber and consisting of a stator and a rotor for generating rotating force by electromagnetic interaction between the stator and... | 04/19/2005 |
| 6607371 | Pneudraulic rotary pump and motor Expansible chamber apparatus for a positive displacement, high volume, low friction, reversible rotary pump for gases and/or liquids. Two or more chambers are provided, defined in part by one or more small abutments that move radially in a slot to switch ... | 08/19/2003 |
| 6468061 | Rotary machine A rotary hydraulic machine (10) for incorporation in a drill string (92) of a well formation (86). The machine (10) is particularly adapted to act as a motor and includes an outer housing (11) of a generally cylindrical configuration having a radial inner... | 10/22/2002 |
| 6280169 | Rotary machine A rotary hydraulic machine (10) for incorporation in a drill string (92) of a well formation (86). The machine (10) is particularly adapted to act as a motor and includes an outer housing (11) of a generally cylindrical configuration having a radial inner... | 08/28/2001 |
| 6152718 | Positive-displacement piston mechanism having a rotary piston structure A positive-displacement piston mechanism includes a small rotor integrated with a main axis and biased against a cylindrical large rotor for holding a bearing-housing. Slant sliding slots are formed at facing places in equally divided space between the la... | 11/28/2000 |
| 6135742 | Eccentric-type vane pump The present invention relates to an eccentric-type vane pump and, in particular, to an eccentric-type vane pump being capable of generating minimum heat and noise due to frictional force produced from rotation of the vane pump. The vane pump comprises a r... | 10/24/2000 |
| 6106257 | Hydraulic power transmission system A hydraulic power transmission system including a stationary inner barrel connected between a hydraulic oil inlet pipe and a hydraulic oil return pipe and having a plurality of openings spaced around the periphery and a plurality of movable blocks moved i... | 08/22/2000 |
| 5733112 | Rotary compressor having a roller mounted eccentrically in a cylindrical chamber of a rotatable cylinder A rotary compressor has a motor-driven rotary body forming a cylindrical chamber in which a roller is rotatable about an axis eccentrically related to the axis of the chamber. The roller is of less diameter than the chamber so that the roller and chamber ... | 03/31/1998 |
| 5597295 | Multi-chamber rotary fluid machine with at least two ring members carrying vanes A multiple rotary fluid machine which includes a stator and a plurality of coaxial rotors held together, sealing vanes and fluid ports which are all offset alternately in the radial plane and form a multiplicity of rotary fluid machines or stages which ar... | 01/28/1997 |
| 5375985 | Multi-chamber rotary fluid machine having at least two vane carrying ring members A multiple rotary fluid machine which includes a stator and a plurality of coaxial rotors held together, sealing vanes and fluid ports which are all offset alternately in the radial plane and form a multiplicity of rotary fluid machines or stages which ar... | 12/27/1994 |
| 5135372 | Multicam and multichamber fluid machine with rotary positive sliding seals A rotary fluid machine including a plurality of fluid chambers defined by a housing and a rotor and by a plurality of lobes and seals engaging with the lobes provided on the housing and the rotor with the number of seals and lobes being unequal and fluid ... | 08/04/1992 |
| 5073097 | Multi-chamber rotary lobe fluid machine with positive sliding seats A rotary fluid machine including a rotor provided with a plurality of lobes, a ring surrounding the rotor and with the lobes defining a plurality of chambers, a housing surrounding the ring and provided with a plurality of depressions which together with ... | 12/17/1991 |
| 4493616 | Pump assembly and operating method An improved pump assembly is used to supply fuel to an aircraft engine and includes a positive displacement pump which supplies fuel during low speed operation of the pump assembly and a centrifugal pump which supplies fuel during relatively high speed op... | 01/15/1985 |
| 4477231 | Variable displacement vane type pump A variable displacement vane type hydraulic pump of simple construction automatically varies its output flow rate, between a maximum value and zero, in response to changes in the output pressure. The pump is characterized by a laterally shifting flow modu... | 10/16/1984 |
| 4458453 | Rotary tool and fluid motor A rotary tool driving an abrasive member about a rotational axis is disclosed. The tool includes a fluid motor comprising an inner stator assembly having a longitudinal stator body and trunnions extending generally axially endwise from the stator body, th... | 07/10/1984 |
| 4456441 | Rotary machine A rotary engine, either prime mover--or pump or compressor--comprises as its basic element a circular casing in which is journalled rotatably a hollow, cylindrical body, the interior wall face of which ascribes a space delimited by recesses alternating wi... | 06/26/1984 |
| 4390328 | Machine with rotary piston including a flexible annular member A fluid driving or fluid driven machine includes an outer cylinder housing stationary piston. The piston includes a generally annular flexible band of smaller circumference than the inner circumference of the cylinder, and a rotary body accommodated withi... | 06/28/1983 |
| 4373878 | Synchronized hydraulic rotary converter and distributor device Rotary hydraulic device comprising a stator 1, a rotor 2 and closing flanges together forming a tore that can amount to several meters in diameter. The rotor 1 has radial grooves 3 each receiving a valve 4 whose lower face moves on the periphery of the st... | 02/15/1983 |
| 4247263 | Pump assembly incorporating vane pump and impeller A fuel pump assembly for supplying fuel to a gas turbine engine has a centrifugal pump, including an impeller, that furnishes the necessary pressure for engine operation at high engine speeds. A vane pump, attached to the back side of the impeller of the ... | 01/27/1981 |
| 4111618 | Hydraulic wheel II A light weight fluid energy converting device utilizing a fluid motor as supporting drive hub for a wheel or other driving attachments; the motor being of the reverse positioned vane type comprising a cylindrical rotor means enclosing a fluid channeled ca... | 09/05/1978 |
| 4006804 | Electromagnetically-actuatable rotary vane pump for use as a hydraulic brake A rotary vane pump incorporating radially displaceable sliding vanes. The sliding vanes can be electromagnetically actuated in order to permit use of the rotary vane pump as a hydraulic brake.... | 02/08/1977 |
| 3988076 | Rotary vane machine with spring-biased vanes An inner component of the fluid machine has an outer circumferential surface, and an outer component has an inner circumferential surface which eccentrically surrounds the outer circumferential surface. One of the components is rotatable relative to the o... | 10/26/1976 |
| 3936252 | Steam propulsion system The invention relates to a system for propulsion utilizing a vapor heat transfer generator to create high pressure steam directly from water vapor which is transferred to rotary cylinder motors of positive displacement design, which are run on ball and ro... | 02/03/1976 |
| 3932076 | Hydraulic wheel A hydraulic wheel, more specifically a hydraulic energy converting device, having an inner stator provided with a peripheral camming surface and a rotor, enclosing the stator, and being rotatably mounted relative thereto; the rotor being adapted to cooper... | 01/13/1976 |
| 3930763 | Rotary cell pump for the conveying of sausage stuffing and the like A rotary cell pump is provided for the conveying of sausage stuffing and the like. The pump has a stationary hub and a stator surrounding the hub in concentric relation therewith and an eccentric rotor. The rotor divides the pump into an inner pumping cha... | 01/06/1976 |
