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Rotary expansible chamber devices March listing by industry category 03/12

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.
03/29/2012 > 3 patent applications in 3 patent subcategories.

20120076681 - Pneumatic stepper motor: A stepper motor suitable for use in a medical imaging environment has (a) a cylindrical central gear having an external surface with circumferentially distributed and radially directed teeth, (b) a shaft for mounting the central gear such that it is constrained to move in rotational motion about its centerline, (c)... Agent: The Johns Hopkins University

20120076682 - Vane pump: Clogging does not easily occur as compared with a case where the gas passage 13 is comprised of a through-hole as a conventional apparatus since the gas passage is comprised of the groove-shaped gas groove 13a, thus enabling to reduce a passage area of the gas passage. Hence, the air... Agent:

20120076683 - Structure of variable oil pump: A variable oil pump includes an inlet connected to supply oil into the housing of the variable oil pump an arc-shaped intake space formed in the housing to be connected to a pumping space between veins mounted on a rotor in the variable oil pump; and a buffer space having... Agent: Hyundai Motor Company

03/22/2012 > 3 patent applications in 3 patent subcategories.

20120070326 - Compression method and means: The invention is a compression method having characteristics of smooth compression and internal cooling of the gas. Embodiments of the invention employ a cylindrical chamber and an orbiting rotor to create a moving duct or chamber whose walls converge, relative to a static gas packet drawn into the moving duct,... Agent:

20120070327 - Pre-pressurization pump liner for vane pump: A vane liner for use in a vane pump has a vane liner body defining an inner bore for providing a cam surface in a vane pump. The cam surface has a suction opening formed through the body at one circumferential extent, and a discharge opening through the body at... Agent:

20120070328 - Vane pump: A vane pump may include an oval fixed portion of which an outer circumference may be oval, a rotation ring that may be rotatably disposed outside of the oval fixed portion with a gap and in which blade slots may be formed in a predetermined depth along a circular interior... Agent: Hyundai Motor Company

03/15/2012 > 2 patent applications in 2 patent subcategories.

20120063941 - Eccentric-screw pump: An eccentric-screw pump has an axially split stator having axially opposite intake and output ends and an elastomeric liner defining an axially throughgoing passage. Respective intake and output housings are releasably secured to the intake and output ends of the stator. An axially extending screw rotor in the passage has... Agent:

20120063942 - Shrouded thrust bearings: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering... Agent: Heartware, Inc.

03/08/2012 > 1 patent applications in 1 patent subcategories.

20120058001 - Screw compressor with economizer: A screw compressor for connecting with an economizer for gas supply, includes a main body defining a compressor cavity, a male rotor and a female rotor received in the compressor cavity, a gas-vent base defining at least one gas-supply hole therein adapted for communicating with the economizer. The male rotor... Agent: Shanghai Power Tech. Screw Machinery Co., Ltd.

03/01/2012 > 4 patent applications in 3 patent subcategories.

20120051958 - Compressor with liquid injection cooling: A positive displacement compressor designed for near isothermal compression. A rotor includes a curved sealing portion that coincides with a in an interior rotor casing wall. Liquid injectors provide cooling liquid. A gate moves within the compression chamber to either make contact with or be proximate to the rotor as... Agent:

20120051959 - Fluid machine and seal member used for the same: An O-ring has a shape including a first portion that is arranged side by side with a suction port in an axial direction, a second portion that is arranged side by side with a suction port, and a third portion that connects these portions. The first portion and the second... Agent: Advics Co., Ltd.

20120051960 - Rotary pump device: A rotary pump device is provided in which a drive shaft is inserted into a center hole of a cylinder that forms rotor chambers, and into outer rotors and inner rotors of rotary pumps. In the rotary pump device, seal mechanisms that include hollow-shaped resin members and annular rubber members... Agent: Advics Co., Ltd.

20120051961 - Pump apparatus: A pump apparatus including a drive shaft and a driven shaft supported by bearing members, respectively, a center plate, first external gears, second external gears, first and second side plates, first and second seal members, a pressing means for applying a pressing force between the tooth tips of the respective... Agent: Hitachi Automotive Systems, Ltd.

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