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Rotary expansible chamber devices May archived by USPTO category 05/09

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.
05/28/2009 > patent applications in patent subcategories.

20090136371 - Progressing cavity pump assembly and method of operation: A progressing cavity pump assembly includes a collar assembly connecting a housing and a tubing string, with the collar having an inside diameter upset and the rotor having a rotor head axially spaced from a rotor helix, with the rotor head having an outer diameter forming a stop adapted to... Agent: Diederiks & Whitelaw, PLC #301

20090136372 - Open drive scroll compressor with lubrication system: A compressor may include a compressor housing, an oil sump, an intake chamber, a compression mechanism, a drive shaft, and a first oil passage. The oil sump may be in communication with the compression mechanism. The intake chamber may be defined within the housing. The drive shaft may include first... Agent: Harness, Dickey & Pierce, P.L.C

20090136373 - Compressor comprising an oscillating piston: The invention relates to a compressor for cryogenic media comprising at least one compressor cylinder in which a compressor piston is arranged, wherein the compressor piston interacts with a crankshaft by means of a connecting rod. To solve the object of attaining a secure operation and of attaining a long... Agent: The Boc Group, Inc.

20090136374 - Vane pump: Provided is a vane pump. In the vane pump, a high-hardness main coating layer is provided on a distal end portion of each vane, and an intermediate coating layer having an intermediate hardness between a hardness of a base material of the vane and a hardness of the main coating... Agent: Babcock Ip, PLLC

20090136376 - Hermetic compressor and refrigeration system: As an refrigerating machine oil (108) that is enclosed in a sealed vessel (106) along a motor element (111), and a compression element (112) driven by the motor element (111), oil that has as base oil a carboxylic ester compound whose kinematic viscosity is 6 mm2/s or less at 40... Agent: Brinks Hofer Gilson & Lione/panasonic

20090136375 - Refrigerant compressor, cooling system and refrigerator: A refrigerant compressor having a compression element comprising sliding components made of metallic materials, wherein a mixed layer is formed by solid-dissolving molybdenum disulfide in at least one of the sliding faces of the sliding components, and a single molybdenum disulfide layer is further formed on the surface of the... Agent: Wenderoth, Lind & Ponack L.L.P.

05/21/2009 > patent applications in patent subcategories.

20090129959 - Balance shaft module equipped with oil pump: A balance shaft module according to the present invention includes a first balance shaft equipped with a first eccentric balance weight, a second balance shaft equipped with a second eccentric balance weight, and a hydraulic pump that is operated by the first balance shaft and the second balance shaft, wherein... Agent: Cho, Myung Rae

20090129960 - Variable displacement pump: A variable displacement pump including a rotor, a plurality of vanes, a swingable cam ring, a suction port and a discharge port, wherein a dynamic radius of the vane which extends from a center of the rotor to a leading edge of the vane is gradually decreased in a closed... Agent: Foley And Lardner LLP Suite 500

05/14/2009 > patent applications in patent subcategories.

20090123313 - Net-displacement control of fluid motors and pumps: Methods for controlling the net-displacement of a rotary fluid pressure device are disclosed. One of the net-displacement control methods (47) includes obtaining a desired input parameter (23) and a relative position (21) of a first member (43) and a second member (35) of a fluid displacement mechanism. A determination of... Agent: Merchant & Gould PC

20090123314 - Oil pump for an internal combustion engine: An oil pump for an internal combustion engine for drawing up the lubricating oil situated in an oil collector device has an oil pump housing wherein at least two pairs of gears are disposed. The pairs of gears, in order to form the pumping stages, are connected on the suction... Agent: Lerner Greenberg Stemer LLP

20090123315 - Scroll compressor: A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll. The scroll compressor includes a compression section 3 constituted of an orbiting scroll... Agent: Buchanan, Ingersoll & Rooney PC

20090123316 - Gear pump: A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the driven rotor mesh to form a positive displacement seal. The teeth of... Agent: Morland C. Fischer

20090123317 - Vacuum pump with a lubricant pump: A vacuum pump includes a quick-rotatable component a bearing for supporting the quick-rotatable component and a lubricant pump for feeding lubricant to the bearing and having a rotor, with the bearing and the lubricant pump forming parts of a closed lubrication circuit having a hollow axle on which the rotor... Agent: Abelman, Frayne & Schwab

20090123318 - Fluid transfer insert: A shaft assembly includes a fluid transfer insert located within a bore of a shaft. The fluid transfer insert seals to the shaft and includes at least one fluid channel that communicates between a plurality of fluid ports located in the shaft. The fluid channel is defined by an outer... Agent: General Motors Corporation Legal Staff

20090123319 - \"rotary piston pump comprising a pump housing and two double bladed rotary pistons\": The invention relates to a rotary piston pump comprising a medium inlet, a medium outlet, and two rotary pistons. Each rotary piston has an outer contour with a constant radius R around the axis thereof, in two opposing peripheral regions, respectively over a peripheral angular region α, and, in the... Agent: Greer, Burns & Crain

20090123320 - Power steering system hydraulic pump: A power steering system hydraulic pump has a pump component which is to be sealed and a first pump cover. A flat sealing element is provided between the pump component which is to be sealed and the first pump cover.... Agent: Macmillan, Sobanski & Todd, LLC

05/07/2009 > patent applications in patent subcategories.

20090116988 - Scroll-type fluid machine: A scroll-type fluid machine has a fixed scroll (40) fixed in a housing (10), a movable scroll (52) that forms pressure chambers (52) in between the movable scroll (50) and the fixed scroll (40) and is orbitable relative to the fixed scroll (40), a support wall (14) that is provided... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090116989 - Oil pump rotor: a tooth profile of the external teeth of the inner rotor includes at least either one of a modification, in a radially outer direction, of the tooth profile, on the outer side of the circle D1 and a modification, in a radially inner direction, of the tooth profile, on the... Agent: Reed Smith LLP

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