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Rotary expansible chamber devices May archived by USPTO category 05/10

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
05/27/2010 > patent applications in patent subcategories.

20100129252 - Pumping-out apparatus and method for pumping out stored fluid: A pumping-out apparatus (13) configured such that a follow plate (22) is placed on a fluid surface (14a) of a stored fluid (14) in a container (2), a suction port (21a) of a pump (21) is attached to an attachment hole (22a) of the plate (22), and the stored fluid... Agent: Alleman Hall Mccoy Russell & Tuttle LLP

20100129253 - Oil pump rotor: An oil pump rotor includes an inner rotor formed with n (n: a natural number) external teeth, and an outer rotor formed with n+1 internal teeth which are in meshing engagement with each of the external teeth. And the oil pump rotor is used in an oil pump that includes... Agent: Buchanan, Ingersoll & Rooney PC

05/20/2010 > patent applications in patent subcategories.

20100124512 - Method for timing a polymer pump containing polymer: A method for restoring the registry of opposed shafts that carry meshing pump teeth inside a polymer pump that contains polymer without removing polymer from within the pump, the method using an asymmetric pattern of apertures in the shaft ends and a template having a pattern of holes that matches... Agent: Lyondellbasell Industries

20100124513 - Gear pump: A gear pump includes a gear to be driven by a drive shaft, a pair of side plate members adjoining side surfaces of the gear, respectively, to restrain leakage of an operating fluid, and a tip seal member or seal block for sealing the gear tip or circumference of the... Agent: Crowell & Moring LLP Intellectual Property Group

05/13/2010 > patent applications in patent subcategories.

20100119396 - Variable displacement dual vane pump: The present invention is a variable displacement pump having an inner rotor rotatable about a first axis and having at least two slots. The pump also has at least two vanes, each located in a distinct one of the at least two slots. The pump also has an outer rotor... Agent: Warn, Hoffmann, Miller & Ozga, P.C.

20100119397 - Fluid machine: Intended is to provide a fluid machine that can prevent wear of a rotation preventing pin. The fluid machine includes a housing, a fixed scroll fixed with respect to the housing, a turning scroll that revolves around the fixed scroll, and a rotation preventing mechanism that prevents the rotation of... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20100119398 - Gerotor pump: A gerotor pump has a pump body having a cavity for housing an outer rotor having an outer surface which slides on the surface of the cavity, and an inner surface with lobes projecting inwards of the outer rotor; and an inner rotor, which is fitted to a drive shaft... Agent: Cnh America LLC

20100119399 - Vacuum pump: A vacuum pump housing comprises first (12) and second half-shell stator components (14) defining a plurality of pumping chambers separated by partition members (26, 28, 30, 32). Each pumping chamber comprises an inlet port (42, 44, 46, 48, 50) for receiving fluid and an outlet port (54, 56, 58, 60,... Agent: Edwards Vacuum, Inc.

05/06/2010 > patent applications in patent subcategories.

20100111736 - Roots-type blower rotor alignment method and apparatus: Roots-type blowers with helical cycloidal rotors exhibit variation in leakback flow with angular position intrinsic to these rotor geometries. Calibration of individual blowers using a combination of high-resolution alignment and enhanced detection of residual noise phenomena permits noise in as-produced blowers to be significantly attenuated. Intrinsic lower limits of noise... Agent: Baker & Hostetler LLP

20100111737 - Compressor: A compressor includes a compression mechanism having two opposed end plates, a fixed member disposed between the two end plates, a movable member disposed between the two end plates, a bypass passage, and an opener/closer. The movable member is arranged to eccentrically move about a predetermined rotational axis to compress... Agent: GlobalIPCounselors, LLP

20100111738 - Scroll member, method of manufacturing same, compression mechanism and scroll compressor: A method of manufacturing a scroll member for a compression mechanism installed in a scroll compressor includes a casting step and a cutting step. An iron casting is formed in the casting step, which includes a spiraling part. The iron casting obtained in the casting step is cut during the... Agent: GlobalIPCounselors, LLP

20100111739 - Scroll member, method of manufacturing same, compression mechanism and scroll compressor: A method of manufacturing a scroll member includes a casting step and a cutting step. In the casting step an iron casting having a spiraling part is formed. In the cutting step, the iron casting obtained in the casting step is cut to obtain a final shape of the scroll... Agent: GlobalIPCounselors, LLP

20100111741 - Scroll compressor: A scroll compressor comprises a fixed scroll, an orbiting scroll engaged with the fixed scroll to form a compression chamber therebetween, a back pressure chamber arranged at a back side of an end plate of the orbiting scroll, a back pressure hole formed in the end plate of the orbiting... Agent: Antonelli, Terry, Stout & Kraus, LLP

20100111740 - Scroll-type fluid displacement apparatus with improved cooling system: An axial air cooling system for scroll-type positive fluid displacement apparatus provides needed cooling. The system includes an axial fan and centrifugal pump and internal cooling air channels inside parts integrating main housing, base housing and motor housing with their corresponding shell parts by cooling fins. The cooling air channel... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20100111742 - Rotary positive displacement pump with magnetic coupling having integrated cooling system: A rotary positive displacement pump for liquid medium having a main pumping mechanism driven by a magnetic coupling is disclosed. The positive displacement pump includes an integrated, positive displacement, circulating pump configured to provide a controlled medium flow through the magnetic coupling from a discharge side (0206) of the main... Agent: Knobbe Martens Olson & Bear LLP

20100111743 - Meshing surfaces for intersecting vanes: The invention provides a toroidal intersecting vane machine incorporating intersecting rotors to form primary and secondary chambers whose porting configurations minimize friction and maximize efficiency. Specifically, it is an object of the invention to provide a toroidal intersecting vane machine that greatly reduces the frictional losses through meshing surfaces without... Agent: Elmore Patent Law Group, PC

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