Rotary expansible chamber devices inventions 03/07

20070071625 - Blending pump assembly: A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the first fluid. The... Agent: Whiteford, Taylor & Preston, LLP Attn: Gregory M Stone

20070071626 - Seal in a scroll fluid machine: In a scroll fluid machine, an orbiting scroll comprises an orbiting end plate having an orbiting wrap and a fixed scroll comprises a fixed end plate having a fixed wrap. An engagement groove is formed at the tip ends of the orbiting wrap and fixed wrap, and/or the fixed or... Agent: Zarley Law Firm P.L.C

20070071627 - Oil pumping device of hermetic compressor: A hermetic compressor uses an oil pump that includes a trochoid gear. Therefore, regardless of the rotation speed of a driving motor of the compressor, a sufficient amount of oil can always be pumped. The oil pump unit may include a plurality of suction holes with openings at different heights.... Agent: Fleshner & Kim, LLP

20070071628 - Compressor: A multi-stage compressor having a shaft with two eccentrics that are offset with respect to the shaft axis of rotation in substantially the same radial direction, compressor also having two vanes oriented in substantially opposite radial directions with respect to shaft axis. Also, a multi-stage compressor having a first-stage cylinder... Agent: Baker & Daniels LLP 111 E. Wayne Street

20070071629 - Twin screw compressor: Double-screw compressor for supplying gas, such as air, to a gas consumer, which screw compressor comprises two interacting rotors for compressing the gas and also a toothed gearing. The toothed gearing comprises a gearing housing with two opposite end walls made of a first material. Two gearwheels made of a... Agent: Holland & Hart, LLP

20070065324 - Rotary compressor: A rotary compressor includes a compression mechanism in which a piston is disposed inside a cylinder chamber of a cylinder. The cylinder and the piston eccentrically rotate relative to each other. The cylinder chamber is sectioned into a high pressure chamber and a low pressure chamber in order to prevent... Agent: GlobalIPCounselors, LLP

20070065325 - Scroll compressor: A scroll compressor includes a first scroll and a second scroll. The first scroll has a step portion that separates an elevated portion and a recessed portion of a surface of the first scroll. A spiral wall of the second scroll has a step that separates an elevated portion and... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070065326 - Rotary piston and methods for operating a rotary piston as a pump, compressor and turbine: A rotary piston (10) that is scalable from nano-scopic to giga-scopic domains and is capable of operating efficiently as a pump, compressor or turbine over a broad range of pressure and volume combinations for a variety of working substances is presented having a stator housing (12) having fixed internal dimensions... Agent: Artz & Artz, P.C.

20070065327 - Oil pump rotor assembly: An oil pump rotor assembly is disclosed. An inner rotor formed with n external teeth is based on cycloid curves which are generated by a first circumscribed-rolling circle and a first inscribed-rolling circle by rolling the first circumscribed-rolling circle and first inscribed-rolling circle along an inner base circle. An outer... Agent: Darby & Darby P.C.

20070059191 - Stator system: The invention relates to an eccentric screw pump and a method for its operation. Unlike the previously known prior art, where changes to the internal geometry of the pump stator caused by wear were always remedied with radially acting clamping measures, the invention is based on bringing this about by... Agent: St. Onge Steward Johnston & Reens, LLC

20070059192 - Flanged sleeve guide: A scroll machine includes a shell and at least one of the scroll members disposed in the shell being mounted for axial movement with respect to the other scroll member disposed in the scroll. The amount of axial movement of the at least one scroll member is accurately controlled by... Agent: Harness, Dickey & Pierce, P.L.C

20070059193 - Scroll compressor with vapor injection: A fitting is secured to a shell of an apparatus. A tube is fixedly and sealingly attached to the fitting by either forming the fitting into engagement with the tube or forming the tube into engagement with the fitting. In both embodiments, engagement between the tube and a contoured surface... Agent: Harness, Dickey & Pierce, P.L.C

20070059194 - Rotor apparatus of pump: To provide a rotor apparatus of a pump in which pressure release in the air gap between an oil seal and an inner rotor is conducted smoothly and good durability and sealing ability of the oil seal is maintained and which has a very simple structure and allows the increase... Agent: Mcginn Intellectual Property Law Group, PLLC

20070059195 - 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.... Agent: Nixon Peabody LLP

20070053782 - Rotary type expander and fluid machinery: A rotary type expander (60) is provided with two rotary mechanism parts (70, 80). These two rotary mechanism parts (79, 80) differ from each other in displacement volume. The outflow side of the first rotary mechanism part (70) of small displacement volume is fluidly connected to the inflow side of... Agent: Birch Stewart Kolasch & Birch

20070053783 - Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle: The invention relates to a stator for an eccentric screw pump or an eccentric worm motor, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow space or cavity, in the shape of a double or multiple spiral, for accommodating... Agent: Robert W. Becker & Associates Ste. B

20070048162 - Multistage root type pump: The invention reduces power consumption and makes rotor with ease. As illustrated in FIG. 2, a multistage roots pump (1) in the invention including upstream rotors (R1a, R1b, R2a, R2b) having multiple teeth, supported by a pair of revolving shafts (A1, A2); and downstream rotors (R3a, R3b˜R5a, R5b) having identical... Agent: Trask Britt

20070048163 - Tip seal in a scroll fluid machine: A scroll fluid machine comprises a stationary scroll having a stationary wrap and an orbiting scroll having an orbiting wrap. A tip seal is provided in a tip-seal groove at the ends of the stationary and orbiting wraps to allow the stationary wrap to engage with the orbiting wrap slidably.... Agent: Zarley Law Firm P.L.C