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Rotary expansible chamber devices April category listing, related patent applications 04/09

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.
04/30/2009 > patent applications in patent subcategories.

20090110577 - Variable delivery vane oil pump, in particular for oil: A variable delivery vane pump, in particular for oil, is provided with a stator (10) eccentrically mounted about a rotor (9), which is adapted to turn about one own longitudinal axis (6), and presents a plurality of grooves (15) radially outwardly opened and slidingly engaged, each, by a respective vane... Agent: Husch Blackwell Sanders LLP

20090110579 - Equal wall stator: A method for making a stator assembly including the steps of providing a generally cylindrical stator casing, hydroforming the stator casing into a generally helical shape, and positioning a stator liner having a generally helical shape inside the stator casing.... Agent: Thompson Hine L.L.P. Intellectual Property Group

20090110578 - Progressing cavity pump with split stator: A progressing cavity pump system including a rotor and a stator having an inner cavity. The rotor is rotationally disposed inside the inner cavity of the stator such that rotation of the rotor relative to the stator causes material in the inner cavity to be pumped through the stator. The... Agent: Thompson Hine L.L.P. Intellectual Property Group

20090110580 - Scroll type fluid machine: The present invention provides a scroll type fluid machine realizing reduced attachment space in a casing and improvement in workability at the time of assembly and the like by using a plurality of ball coupling mechanisms. A plurality of ball coupling mechanisms are disposed between a casing and a rear... Agent: Rader Fishman & Grauer PLLC

20090110581 - Scroll compressor for carbon dioxide refrigerant: A scroll machine is provided with wear resistant features to provide the scroll machine with improved operation when processing CO2 refrigerant. In certain aspects, the scroll machine has an Oldham coupling comprising aluminum, where the aluminum has an anodized surface forming a passivation layer thereon. The scroll machine optionally further... Agent: Harness, Dickey & Pierce, P.L.C

20090110582 - Vane machine: A vane machine according to the invention comprises a housing (1) with a inlet port (2) and an outlet port (3), and a rotor mounted in a cavity (4) of the housing (1) and constituted by a faceplate (5). The vane machine further comprises a guide cylinder (7) mounted eccentrically... Agent: Frommer Lawrence & Haug

20090110583 - Rotary blower with super-charged injection cooling: This invention involves a rotary blower with super-charged injection cooling having multiple interconnected and synchronized parallel multi-lobe rotors with the same number of lobes for propelling flow from a suction port to a discharge port of an inner casing without using internal compression. The embodiments incorporate manifolds near the blower... Agent: Paul Xiubao Huang

20090110584 - High pressure telescoping gear pumps and motors: Rotary seals in a telescoping gear pump/motor a feature that allows the seal to shift radially relative to other components while maintaining the seal integrity and without compromising the function of the bearings or the bushings needed to bear the load.... Agent: Fraser Clemens Martin & Miller LLC

20090110586 - Refrigerant compressor: A hermetically encapsulated refrigerant compressor which comprises a hermetically sealed compressor housing (1), in the interior of which a piston-cylinder unit which compresses a refrigerant and a suction pipe (2) and a pressure pipe (3) are provided, with refrigerant flowing via the suction pipe (2) to the piston-cylinder unit and... Agent: Collard & Roe, P.C.

20090110585 - Refrigerant compressor arrangement: The invention concerns a refrigerant compressor arrangement with a compressor unit (2) supported in a case by means of springs (12) and comprising at least one bolt (26) with a bolt head (25), a holder (23) being arranged between the compressor unit (2) and at least one spring (12), the... Agent: Mccormick, Paulding & Huber LLP

04/23/2009 > patent applications in patent subcategories.

20090104060 - Compressor: In a compressor provided with two compression mechanisms of a rotary type compression mechanism and a scroll type compression mechanism, torque fluctuations are reduced. The compressor 1 includes a hermetic housing 2, a low stage-side compression mechanism 3 and a high stage-side compression mechanism 4 provided in the hermetic housing... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20090104061 - Tipseal for a scroll compressor: A scroll compressor including a non-orbiting and an orbiting scroll member having mating involute wraps extending therefrom. In one exemplary embodiment, at least one of the non-orbiting and orbiting scroll members includes an inner wall forming a groove in an end of the involute wrap and extending substantially entirely along... Agent: Baker & Daniels LLP 111 E. Wayne Street

20090104062 - Compressor: There is provided a compressor capable of feeding lubricating oil to a blade of a rotary type compression mechanism even if the oil level in an oil reservoir lowers. The compressor 1 includes a low stage-side rotary type compression mechanism 3 having a rotor 34, and a blade 38 reciprocating... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20090104063 - Rotor for a vane pump, made of plastic material reinforced by metallic foil: A rotor (1-3) moulded of plastic material, intended for rotary installation in a cavity of a pump body and for reception of one or more vanes forming the pumping members, characterized in that at least a part of the surfaces thereof, intended to undergo sliding displacements against other pump members,... Agent: Young & Thompson

20090104064 - Method for manufacturing trochoid pump and trochoid pump obtained: The present invention enables the manufacture of a trochoid pump having a crescent which has been considered theoretically impossible, by employing an inner rotor of a trochoid pump. An inner rotor having a predetermined number N of teeth that is equal to or larger than 4 is formed in advance.... Agent: Mcginn Intellectual Property Law Group, PLLC

04/16/2009 > patent applications in patent subcategories.

20090098000 - Scroll compressor with scroll deflection compensation: A scroll compressor may incorporate controlled bending of a scroll member to compensate for axial deformations that can occur between the scroll members. The controlled bending may be through the use of fluid pressure in a sealed chamber that communicates with a surface of the scroll member opposite the intermeshing... Agent: Harness, Dickey & Pierce, P.L.C

20090098001 - Sealing tabs on orbiting scroll: An improved sealing mechanism for a positive fluid displacement apparatus, where sealing tabs are located on the orbiting scroll. The sealing tabs can be integrally formed with the orbiting scroll or disposed on a piston that is mounted on the orbiting scroll.... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20090098002 - Process for hardfacing a metal body: A method of hardfacing a metal body, including the steps of flame spraying a metallic material onto a surface of the metal body to produce a layer of the metallic material on the metal body and fusing the layer of metallic material to provide a hardfacing layer, is improved by... Agent: Eaton Peabody Patent Group, LLC

20090098003 - Multiphase screw pump: A twin screw pump includes a pair of rotors disposed inside a casing having an inlet and an outlet. Each rotor includes a set of threads disposed on a portion of an outer surface of a shaft. A first bearing is coupled at a first end of the shaft and... Agent: General Electric Company Global Research

04/09/2009 > patent applications in patent subcategories.
04/02/2009 > patent applications in patent subcategories.

20090087330 - Fluid pump: A pump is disclosed, having a pumping chamber in the rotor. The rotor is rotatable between first, second, third and fourth positions. When the rotor is in the first position, an inlet cam assembly displaces a piston to draw fluid into the pumping chamber via a first housing inlet. When... Agent: Osler, Hoskin & Harcourt LLP (brp)

20090087331 - Scroll type fluid machine: This invention provides a scroll type fluid machine which can simultaneously realize the stabilization of the behavior in the rotational direction of an orbiting scroll and the reduction in the manufacturing cost by the ease of holding a grease. In the scroll type fluid machine, three pairs of rotation prevention... Agent: Rader Fishman & Grauer PLLC

20090087332 - Compressor having improved sealing assembly: A compressor may include a shell, a bearing housing assembly located within and secured to the shell, a compression mechanism supported on the bearing housing assembly, a partition extending over the compression mechanism, and an annular seal assembly. The partition may be fixed to the shell and may abut an... Agent: Harness, Dickey & Pierce, P.L.C

20090087333 - Gerotor pump: A gerotor pump comprises a rotor chamber having a longitudinally extending central axis, an outer rotor rotatable in the rotor chamber with a radial clearance between an outer periphery of the outer rotor and the rotor chamber, an inner rotor rotatable in the outer rotor and cooperably engageable therewith to... Agent: Delphi Technologies, Inc.

20090087334 - Sliding vane compression and expansion device: A sliding vane compression and expansion device for both cryogenic and normal refrigeration cycles, including the production of liquefied natural gas, is disclosed herein. The device can operate in extreme conditions of pressure and temperature, and incorporates replaceable wear elements as well as functional design elements into a sliding vane... Agent: Hasse & Nesbitt LLC

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