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Rotary expansible chamber devices October categorized by USPTO classification 10/12

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.
10/25/2012 > 3 patent applications in 3 patent subcategories.

20120269668 - Polymeric external gear pump for hot cooking oil: An overhung external spur gear positive displacement pump for hot oil or deep fryer applications is disclosed. The external gear pump includes a thermoplastic casing that includes a through bore for accommodating a drive shaft that leads to a pump chamber that accommodates a drive gear and a driven gear.... Agent: Viking Pump, Inc.

20120269669 - Rotors formed using involute curves: The present disclosure describes the use of involute curves for use in energy conversion devices, as well as timing or indexing gears. Several different embodiments are shown using rotors of several examples of lobe numbers and shapes.... Agent: Exponential Technologies, Inc.

20120269670 - Vane compressor: A vane compressor includes a cylinder block, a cylinder chamber having an ellipsoidal inner wall, a rotor whose outer circumferential surface is provided with vane slots formed thereon, a drive source for the rotor, and vanes housed in the vane slots, respectively. The rotor is rotated by the drive source... Agent: Calsonic Kansei Corporation

10/18/2012 > 5 patent applications in 5 patent subcategories.

20120263614 - Housingless positive displacement pump assembly: Housingless positive displacement pump assembly comprises one or more vane or gerotor type housingless positive displacement pump units, each comprising pump unit components. One or more retaining rods extend through axially aligned holes in a mounting flange at one end of the pump assembly and the pump unit components to... Agent:

20120263615 - Scroll fluidic device: Provided is a scroll fluidic device that is capable of reducing suction pressure loss as well as suppressing discharge pulsations and reducing noise. The scroll fluidic device is characterized in that a fixed scroll member is integrally formed with a center housing on the inside of the center housing disposed... Agent:

20120263616 - Fluid power helical rotary actuator: A fluid-powered, helical rotary actuary is provided. The actuary includes a housing, a shaft with output ends positioned in the housing, and a piston sleeve surrounding the shaft and also positioned within the housing. The shaft includes a groove for receiving a collar. The collar creates a false shoulder such... Agent: Rosenboom Machine & Tool, Inc.

20120263617 - Positive displacement rotary system: A positive displacement rotary system may include a main rotor and a slotted rotor. The main rotor can include an interior cavity and a fixed vane (or blade) that is attached to the peripheral and side walls of that cavity. The slotted rotor is positioned within the main rotor interior... Agent:

20120263618 - Bi-metal pump gear: A pump gear is provided. The pump gear includes a first shaft portion having a first end and a second end with an integral gear portion formed therebetween. The first shaft portion is made from a first tool steel material. A second shaft portion having a third end brazed to... Agent: Hamilton Sundstrand Corporation

10/11/2012 > 7 patent applications in 6 patent subcategories.

20120258000 - System and method for monitoring pump lining wear: A system for monitoring wear of pump casing liners is disclosed. The system may include a wear sensor disposed in proximity to the pump casing liner so that the sensor wears at substantially the same rate as the lining. The wear sensor may include a plurality of circuit loops having... Agent: Imo Industries Inc.

20120258001 - Progressing cavity pump/motor: A progressing cavity pump/motor includes a stator (12) having a metal interior surface (14) and one or more spiraling internal lobes (16). The rotor (18) has a metal exterior surface (20) and one or more spiraling external lobes (22) for cooperating with the stator to form progressing cavities between the... Agent:

20120258002 - Electric machine: A three-phase, high voltage motor for use in a scroll compressor includes a stator core having an annular rim and a plurality of teeth extending radially inward from the rim. Aluminum windings are wrapped around teeth of the plurality of teeth of the stator core. The windings are spaced 120... Agent:

20120258004 - Scroll compressor: A compressor may include a shell assembly, a first scroll member located within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate, and a second scroll member located within the shell assembly, supported for orbital movement relative to the... Agent:

20120258003 - Scroll compressor with spring to assist in holding scroll wraps in contact: An electric motor drives a shaft to cause one scroll member to orbit relative to another scroll member. The shaft has an eccentric pin extending upwardly into a slider block. The eccentric pin is further provided with a generally flat drive surface, with clearance provided between the bore of the... Agent:

20120258005 - Single-screw compressor: A single-screw compressor includes a screw rotor, a cylinder wall in which the screw rotor is rotatably accommodated, a driving mechanism which variably drives the screw rotor according to a load, and a slide valve which is provided in a slide groove formed in the cylinder wall. The slide valve... Agent: Daikin Industries, Ltd.

20120258006 - External gear pump for hot cooking oil: An overhung external spur gear positive displacement pump for hot oil or deep fryer applications is disclosed. The external gear pump includes a casing that includes a through bore for accommodating a drive shaft that leads to a pump chamber that accommodates a drive gear and a driven gear. The... Agent: Viking Pump, Inc.

10/04/2012 > 7 patent applications in 7 patent subcategories.

20120251368 - Pump: The present invention provides a positive displacement dry pump comprising: a plurality of vacuum pumping stages comprising a respective plurality of pumping mechanisms driven by one or more drive shafts for pumping fluid in series through the pumping stages from a pump inlet at the high vacuum stage to a... Agent: Edwards Limited

20120251369 - Scroll compressor and method for machining discharge port of the same: A scroll compressor in which a paired fixed scroll and rotating scroll each having a spiral wrap provided upright on an end plate are engaged to form a compression chamber and in which a discharge port that discharges fluid compressed in the compression chamber is provided at the central portion... Agent: Mitsubishi Heavy Industries, Ltd.

20120251370 - Internal gear pump: An internal gear pump for delivering a fluid, in particular one of the gerotor pump type, having a driven gear wheel, a rotatable annular gear interacting with the gear wheel, and a substantially cylindrical housing, in which the gear wheel and the annular gear are arranged. The housing has a... Agent: Magna Steyr Fahrzeugtechnik Ag & Co Kg

20120251371 - Gear pump: In a gear pump in which a driving rotor that is driven by a driving source meshes with a driven rotor that is driven by the driving rotor for rotation to pump a hydraulic oil, only one of the driving rotor and the driven rotor is given the steam treatment... Agent: Honda Motor Co., Ltd.

20120251372 - Screw compressor: A screw compressor comprising: a low pressure stage compressor body; a high pressure stage compressor body that further compresses a compressed air compressed by the low pressure stage compressor body; pinion gears for example, respectively, provided on, for example, a male rotor of the low pressure stage compressor body and,... Agent:

20120251373 - Gas flow separator with a thermal bridge de-icer: The invention relates to a gas flow separator dividing the flow into a primary and a secondary stream, especially for a dual rotor axial turbomachine. The separator comprises a splitter nose of the turbomachine and includes a generally wedge-shaped leading edge in the gas flow to be split. The flow... Agent: Techspace Aero S.a.

20120251374 - Multiple rotor fluid transfer engine: A fluid transfer engine employs a case with a cylindrical inner wall having an operating radius extending from a case axis. A main rotor is carried within the case and incorporates a lobe with a major radius equal to and concentric with the operating radius of the case, the main... Agent: Gyroton Corporation

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