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Pumps > Motor Driven > Electric Or Magnetic Motor > Rotary Expansible Chamber Pump Rotary Expansible Chamber PumpRotary Expansible Chamber Pump patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.05/31/07 - 20070122297 - Rotary compressor An object is to solve a problem that the smaller the number of rotations of a rotary compressor is, the more an efficiency decrease of the compressor is generated owing to an increase of a rotary vibration and an efficiency decrease of a motor. In the rotary compressor including, in ... 05/10/07 - 20070104595 - Eccentric screw pump with integrated drive The invention relates to an eccentric screw pump which includes a stator and a rotor rotating therein as well as a drive motor for driving the rotor. The armature of the drive motor is non-rotationally linked with the rotor and rotates inside a cylindrical pot on an eccentric orbit. The ... 02/22/07 - 20070041852 - Rotary compressor A rotary compressor includes a rotation mechanism, an annular piston and a blade. The rotation mechanism has a cylinder with an annular cylinder chamber. The annular piston is contained in the cylinder chamber eccentrically from the cylinder and sectioning the cylinder chamber into an outer compression chamber and an inner ... 09/21/06 - 20060210408 - Hermetically sealed compressor A hermetically sealed rotary compressor 100 including an electrically-driven element 2, a rotary compressing element 4 equipped with a cylinder 41 having a compression chamber 43 and a hermetically sealed container 1 in which oil 8 is stocked, is equipped with and oil path 62 for injecting the oil 8 ... 09/21/06 - 20060210407 - Hermetically sealed compressor and method of manufacturing the same In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which ... 09/14/06 - 20060204377 - Internal intermediate pressure multistage compression type rotary compressor, manufacturing method thereof and displacement ratio setting method There is provided an internal intermediate pressure multistage compression type rotary compressor capable of reducing a height dimension while reducing the amount of oil to be discharged outside. An electric element and first and second rotary compression elements which are driven by a rotary shaft of the electric element disposed ... 07/20/06 - 20060159567 - Hand-held vacuum pump and automated urinary drainage system using pump thereof In the hand-held vacuum pump 1, the main body 1a of the vacuum pump in which the pump room 4a is formed and the electric motor 2 are connected via the shaft coupling 21. The main body of the vacuum pump has the driving shaft 10. One ball bearing 15b ... 07/20/06 - 20060159566 - Multi-stage rotary compressor A multi-stage rotary compressor to reduce a driving load and prevent a malfunction due to an abrupt pressure rising. In the compressor of the type including first and second compressing units mounted in a hermetic casing thereof to compress a gas, the gas being primarily compressed in the first compressing ... 07/13/06 - 20060153705 - Drive shaft for compressor A compressor assembly that includes a driveshaft and at least one eccentric press-fit to the shaft. In one embodiment, the driveshaft includes an opening at a first end and the eccentric includes a linking rod press-fit into the opening. During assembly, the first end of the shaft is inserted through ... 06/29/06 - 20060140791 - Miniature rotary compressor, and methods related thereto Disclosed is a rolling piston rotary compressor for use with primary refrigerants that is miniaturized for portable and mobile applications for which size and weight are often crucial. The miniature rotary compressor comprises a compressor mechanism, a brushless DC motor and a casing. The compressor mechanism comprises, a cylinder, a ... 06/29/06 - 20060140790 - G-rotor pump Disclosed is a G-rotor pump in which a lid and a bottom of a pump housing are made of plastic. A spacer that supports the bottom is produced as a single piece with the lid, whereby the G-rotor pump can be embodied in a particularly inexpensive manner. ... 06/08/06 - 20060120895 - Rotary positive displacement engine The rotary positive displacement engine includes a compressor housing having a compression chamber therein and a rotor housing having a rotor chamber therein. The rotor housing and compressor housing are in fluid communication and define a main housing having a first end plate, an opposing second end plate, and a ... 06/08/06 - 20060120894 - Hermetic compressor A compression mechanism has a cylinder, a suction passage and a discharge passage. The suction passage of a cylinder is connected to a suction pipe. The discharge passage is open to an inner space of a sealed housing. A discharge gas is discharged through a discharge pipe. The cylinder is ... 04/20/06 - 20060083637 - Pumping system with progressive cavity pump Pumping system comprising: a progressive cavity pump comprising a helical rotor inside a helical cavity of an outer stator; motor means for driving the rotor, with a motor shaft coaxial to the axis of the stator cavity; and an intermediate shaft coupled, at its ends, by respective couplings, to the ... 04/13/06 - 20060078442 - Compressor An object is to provide a compressor in which durability of a compression member is improved, reliability of the compressor is enhanced, and a satisfactory sliding property can be secured even in a case where a compression element is non-lubricated, the compressor comprises: the compression element comprising a cylinder in ... 04/13/06 - 20060078441 - Compressor An object is to provide a highly efficient compressor at a low cost while reducing sliding losses of a vane and inhibiting a leakage from the vane and a compression member to improve a workability of the vane. The compressor comprises: the compression member whose upper surface (one surface) crossing ... 04/13/06 - 20060078440 - Compressor An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability. The compressor comprises: a compression element comprising a cylinder in which a compression space is constituted; a suction port and a discharge port which communicate ... 04/06/06 - 20060073034 - Compressor A compressor is provided which enables easy installation of the filter even when any refrigerant suction passage cannot be provided on a cylinder side of a compression element or even when any long suction passage cannot be provided. The compressor comprises, in a sealed container 12, a drive element 14, ... 04/06/06 - 20060073033 - Portable, rotary vane vacuum pump with removable oil reservoir cartridge A portable, rotary vane vacuum pump with a rotor eccentrically mounted within the bore of a housing to substantially abut the bore at a side location. The abutting, side location is between the inlet and outlet passages of the bore in the direction of rotor rotation. A pocket is then ... 04/06/06 - 20060073032 - Progressing cavity pump with dual material stator A progressing cavity pump including a rotor and a stator having an inlet and an outlet. The rotor is rotationally disposed inside of the stator such that rotation of the rotor causes fluid in the pump to be pumped from the inlet toward the outlet in a downstream direction. The ... 04/06/06 - 20060073031 - Low input torque rotor for vane pump A vane-type fluid displacement unit having a housing, a drive shaft extending through the housing, a rotor secured to the drive shaft and disposed within the housing, the rotor having at least one non-smooth top or bottom surface, and at least one vane secured to the rotor. ... 02/02/06 - 20060024179 - Two-stage hydraulic pump A two-stage hydraulic pump includes a rotor, a ring, and a plurality of rollers disposed in slots formed on the rotor. The pump has two inlet ports and two outlet ports, which are disposed inwardly and outwardly, respectively, of the rollers. A valve mechanism is incorporated which provides for flow ... 01/26/06 - 20060018768 - Oil pump An oil pump is provided which includes a cam ring made of a material having a first line expansion coefficient, a pump element rotatably disposed in the cam ring and smaller in an axial length than the cam ring, a first housing member disposed on one of axially opposite sides ... 12/29/05 - 20050287019 - Gas compressor A gas compressor includes a housing with suction and discharge ports, and a gas-compressing mechanism housed in the housing to compress a gas sucked through the suction port and discharge the compressed gas via the discharge port. The mechanism includes a cylinder defining a cylinder chamber with a circular or ... 12/22/05 - 20050281689 - Diametric slider block pump A pump includes a base, a rotor, a slider block, a cover, and a drive member. Thus, the pump is used to pump the fluid in two opposite directions by changing the rotation direction of the rotor without having to change the parts of the pump, thereby enhancing the versatility ... 12/15/05 - 20050276704 - Piston for a rotary combustion engine A rotary combustion engine with at least one working unit, which has essentially a peripheral engine housing, a side housing plate on one side, a side housing plate on the power takeoff side, a triangular piston, and an eccentric shaft. The piston is configured of several parts, which are connected ... 11/24/05 - 20050260082 - Oil-sealed vane rotary vacuum pump An oil-sealed vane rotary vacuum pump includes at least one pump stage arranged in the housing and having a cylindrical chamber, a shaft excentrically arranged in the cylindrical chamber and provided with vanes, and a drive for driving the shaft and having a plurality of permanent magnets arranged on the ... 11/17/05 - 20050254968 - Impeller pump with reciprocating vane and non-circular rotor An impeller-type pump includes a housing with an internal chamber, a rotor within the chamber and a vane mounted to the housing for reciprocating action such that an end of the vane contacts the rotor and effectively divides the chamber between induction and exhaustion rotor chambers. The rotor has a ... 09/29/05 - 20050214138 - Multistage rotary compressor The present invention relates to a multistage rotary compressor. In the multistage rotary compressor, a motor-operating element 5 and a rotary compressing element 6 are provided at upper and lower portions in a closed vessel 1. In the rotary compressing element 6, a low stage side rotary compressing element 9 ... 09/29/05 - 20050214137 - Multicylinder rotary compressor and compressing system and refrigerating unit provided with same The present invention relates to a multicylinder rotary compressor and a compressing system and a refrigerating unit each provided with the multicylinder rotary compressor. Two-stage (cylinder) rotary compressor provides a motor-operating element and a rotary compressing element in a closed vessel, and the rotary compressing element includes a first rotary ... 09/22/05 - 20050207916 - Sliding vane pump In a sliding vane pump comprising a rotor supported in a housing and having vanes supported radially movably in radially extending slots of the rotor so as to be in contact with the inner surface of a contour ring which is rotatably supported in the housing and forms with the ... 09/08/05 - 20050196299 - Hinged paddle pump A rotary pump for fluids which comprises a shaft to rotate about a longitudinal axis and a cylindrical rotor centrally secured to that shaft. A housing encases the shaft and rotor, the housing having interior end walls adjacent to the rotor disks and an interior side wall. Fluid inlet and ... 08/25/05 - 20050186094 - Power steering pump having electronic bypass control A power steering pump comprises a housing that includes a bore, a fluid discharge port that supplies pumped fluid into the bore, and a fluid bypass port for recycling excess fluid to the pumping elements. A flow control valve is slideably received in the bore and regulate the size of ... 08/18/05 - 20050180865 - Vacuum pump A rotating vane vacuum pump has a secondary inlet (4) which permits additional suction after the primary inlet (3) has closed. ... 07/28/05 - 20050163630 - Compressor A compressor includes a housing member having a through hole. The compressor includes a conductive portion through which external electricity is supplied to a motor mechanism. The conductive portion has a lead extending from the motor mechanism, and a connector terminal. The connector terminal is connected to the lead to ... 07/14/05 - 20050152792 - Compressor There is provided an efficient compressor which is simple in structure and small in torque fluctuation. The compressor comprises a compression element which comprises a cylinder having a compression space formed therein, a suction port and a discharge port which communicate with the compression space in the cylinder, a compression ... 06/09/05 - 20050123418 - Compact compressors and refrigeration systems Compact compressors and refrigeration systems that can be used to cool computers, servers, and other electronic equipment. Each compact compressor or refrigeration system includes a compact, substantially enclosed hermitic housing having a simple geometry profile, such as a rectilinear profile, which enables the compact compressor or refrigeration system to be ... 06/02/05 - 20050118039 - Roller vane pump A roller vane pump for fluid includes a carrier which is rotatable in a housing about an axis of rotation, the carrier carrying a plurality of roller vanes which are each received in a respective slot which extends inwardly of a periphery of the carrier and permits the roller to ... ### FreshPatents.com Support - Terms & Conditions |