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Rotary expansible chamber devices June invention type 06/12

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.
06/28/2012 > 6 patent applications in 6 patent subcategories. invention type

20120164013 - Positive-displacement pump including a pressure absorber: The positive-displacement pump (10) comprises a pump body (12) delimiting a rubber pressurizing chamber (14), and a feeder (16) for feeding the chamber (14) with rubber. The feeder (16) comprises a worm (42) able to rotate about a main axis (X) with respect to the pump body (12) and an... Agent:

20120164014 - Scroll compressor: A scroll compressor includes a pressing mechanism and a back-flow prevention mechanism. The pressing mechanism includes a back-pressure chamber facing a back surface of a movable-scroll end plate, and a back-pressure supply path arranged to allow the back-pressure chamber to communicate with a compression chamber which is in a state... Agent: Daikin Industries, Ltd.

20120164015 - Water injection type screw fluid machine: A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is located on the high pressure side and in this order from the rotor chamber side. the... Agent: Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

20120164016 - Rinsing arrangement for tribological contact area and rotary vane pump with such an arrangement: A cooling and lubricating arrangement of tribological contact areas is disclosed. The arrangement includes tribological contact areas that slide over one another, of which at least one contact area has a surface contour with surface depressions in which a lubricant is stored. The surface contour forms a number of elongate... Agent: Robert Bosch Gmbh

20120164017 - Oil free screw compressor: A multi-stage oil-free screw compressor includes: a suction throttle valve for controlling air intake into the compressor; a piston assembly for operating the suction throttle valve; and a structure for supplying a working pressure to the piston assembly. In order to reduce startup load at the time of startup of... Agent: Hitachi Industrial Equipment Systems Co., Ltd.

20120164018 - Metering pump with special-shaped cavity: The invention discloses a metering pump with a special-shaped cavity, which comprises a housing, a rotor and two cover plates. The housing is a cylinder with a special-shaped surface inner cavity, an inlet and an outlet, and the special-shaped surface inner cavity is formed by combining a circular arc surface... Agent: Zhejiang University

06/21/2012 > 6 patent applications in 5 patent subcategories. invention type

20120156076 - Vane pump: P

20120156077 - Cam liner profile: A vane pump is provided and includes a liner having an inlet window and a discharge window, the liner being formed to define a cam surface and a rotor carrying a plurality of radially extending vanes which are forced outwardly such that vane tips thereof contact with the cam surface,... Agent: Hamilton Sundstrand Corporation

20120156078 - Progressing cavity pump/motor: A progressing cavity pump/motor (10) includes a stator housing (12), a polymeric layer (14), and a rotor (16). A plurality of axially extending grooves (24) are formed in the interior surface of the stator housing for receiving polymeric material therein. At least one seal gland (46) adjacent an end of... Agent:

20120156079 - Screw compressor: A screw compressor including a driving machine having an output shaft coupled to an input shaft of a compressor main body; a clutch mechanism between the output shaft of the driving machine and the input shaft of the compressor main body; a pressure sensor installed in a discharge channel; and... Agent: Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

20120156080 - Hydraulic toothed wheel machine: A toothed wheel machine including a housing for receiving two meshing toothed wheels. The toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. Hydraulic mechanical forces are generated during... Agent: Robert Bosch Gmbh

20120156081 - Shaft structure in a pneumatic actuator: An improved structure of a central shaft in a pneumatic actuator comprises an actuator having an actuator chamber; a vane which is hingedly located at a shaft hole of the actuator. The central shaft is cylindrical and short, and the short central shaft has a through hole which is a... Agent:

06/14/2012 > 4 patent applications in 4 patent subcategories. invention type

20120148432 - Enhanced elastomeric stator insert via reinforcing agent distribution and orientation: A progressive cavity type motor or pump including a stator insert with a reinforcing agent dispersed in a manner to improve properties of the stator insert. The reinforcing agent may be a fiber, nanotube, metal, ceramic, or polymer. A dispersing agent may be used to obtain a homogenous distribution. A... Agent: National Oilwell Varco, L.p.

20120148433 - Floating apparatus for scroll compressors: An improved floating apparatus for scroll compressors is disclosed, which is a multi-function device integrating a temperature protection mechanism, a pressure protection mechanism and a backflow-proof mechanism and therefore substantially is a floating seal member with overheating protection, high pressure protection and backflow-proof capabilities. In detail, the present disclosure provides... Agent: Industrial Technology Research Institute

20120148434 - Scroll fluid machine: Disclosed is a scroll fluid machine wherein a scroll unit achieves higher performance while maintaining reliability. The disclosed scroll fluid machine is provided with: a first actuation chamber (100) and second actuation chamber (102) partitioned by the central end (98) of a wrap (48, 64) of a fixed scroll (44,... Agent:

20120148435 - Screw compressor: Provided is a screw compressor, accommodating a pair of rotatable male and female screw rotors in a compression chamber formed in a casing, wherein the casing includes: an internal dividing wall that defines an inside interior space; and an outer wall that defines an outside interior space arranged outside the... Agent: Kabushiki Kaisha Kobe Seiko Sho (kobe Steel, Ltd.)

06/07/2012 > 6 patent applications in 6 patent subcategories. invention type

20120141311 - Scroll pump: The present application relates to a scroll compressor comprising a scroll pumping mechanism which comprises an orbiting scroll (20) having an orbiting scroll wall (34) extending axially from an orbiting scroll plate (36) towards a fixed scroll (22) and a fixed scroll having an fixed scroll wall (28) extending axially... Agent: Edwards Limited

20120141312 - Compressor: The present invention relates to a compressor in which a rotary member is suspended on a stationary member and rotated to compress the refrigerant. In the stationary member, top and bottom ends of a stationary shaft are fixed to improve the structural stability and assembly property. Bearing covers are provided... Agent:

20120141313 - Vacuum pump: The invention relates to a vacuum pump comprising a cup-shaped housing, a rotor eccentrically mounted for rotation in the housing, and a housing cover closing the cup-shaped housing, wherein the rotor has a rotor shaft that passes through the cup-shaped housing and by which the rotor is driven, wherein the... Agent: Joma-polytec Gmbh

20120141314 - Vacuum pump: The invention relates to a vacuum pump having a cup-shaped housing, a rotor, eccentrically mounted for rotation in the housing, at least one blade mounted in or on the rotor, and a housing cover closing the cup-shaped housing, wherein the rotor has a rotor shaft that passes through the cup-shaped... Agent: Joma-polytec Gmbh

20120141315 - External gear pump: An external gear pump capable of achieving both a sealing property and a sliding property is disclosed. The external gear pump includes a pair of rotating shafts that are respectively pivotally supported by bearings provided in a casing; at least a pair of gears that are respectively fixed to the... Agent: Hitachi Automotive Systems, Ltd.

20120141316 - Gear root geometry for increased carryover volume: A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter.... Agent:

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