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Rotary expansible chamber devices May archived by USPTO category 05/08

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.
05/29/2008 > patent applications in patent subcategories. archived by USPTO category

20080124236 - Scroll-type apparatus: Scroll-type pumping apparatus comprises a stator (104) comprising a fixed scroll member (106) having an end plate with a first spiral wrap (118) extending therefrom, and an orbital scroll member (108) having an end plate with a second spiral wrap (120) extending therefrom to intermesh with the first spiral wrap... Agent: The Boc Group, Inc.

20080124237 - Bi-directional pump mechanism for balanced flow fluid exchanger: A fluid pump assembly having a rotatable vane received with a pump housing with the vane holder rotatably carrying a plurality of vanes with each vane being biased into contact with a perimeter wall of the pump housing. A fluid exchange device utilizes the fluid pump assembly to exchange fluids... Agent: Fulbright & Jaworski L.L.P.

05/22/2008 > patent applications in patent subcategories. archived by USPTO category

20080118383 - Vacuum pump having fluid port and exhaust system: In an embodiment, a vacuum pump is capable of preventing adhesion of by-products to its surfaces. The vacuum pump includes a stator. The stator includes a cylinder wall and a pair of diaphragms disposed at opposite ends of the stator. A rotary shaft passes through the diaphragms, and a lobe... Agent: Marger Johnson & Mccollom, P.c.

20080118384 - Vane pump: A vane pump includes a rotor chamber; a rotor accommodated in the rotor chamber; a plurality of vanes attached to the rotor, each vane having a leading end adapted to make sliding contact with an inner peripheral surface of the rotor chamber. The vane pump includes working compartments surrounded by... Agent: Bacon & Thomas, Pllc

05/15/2008 > patent applications in patent subcategories. archived by USPTO category

20080112831 - Hermetically sealed compressor and method of manufacturing the same: In a hermetically sealed compressor 100 including a rotary compressing element (4) having at least one cylinder (43A, 43B), and a roller (45) provided to the cylinder so as to be freely eccentrically rotatable, an electrically-driven element (2) for driving the roller (45) and a hermetically sealed container in which... Agent: Darby & Darby P.c.

20080112832 - Hermetic screw compressor: A hermetic screw compressor comprises a male rotor, a female rotor engaging the male rotor, an electric motor connected to a low pressure side shaft portion of the male rotor, a low pressure side bearing for supporting the low pressure side shaft portion of each of the rotors, a high... Agent: Antonelli, Terry, Stout & Kraus, LLP

05/08/2008 > patent applications in patent subcategories. archived by USPTO category

20080107554 - Pump control using overpressure source: A rotary positive displacement pump employs the higher pressure available at a region he rotor chamber after the outlet port to augment the force of a biasing spring in a control A biasing spring with a lower spring force can thus be employed in the control system, g in a... Agent: Magna International, Inc.

20080107555 - Scroll compressor with vapor injection and unloader port: A scroll compressor is provided with a passage for providing both an unloader function and an economizer injection function. This common passage communicates with separate ports. The ports that are exclusively used for by-pass unloading operation are open only during by-pass unloading operation, but blocked off by a check valve... Agent: Carlson, Gaskey & Olds, P.c.

20080107556 - Rotary compressor: Disclosed is a rotary compressor having two compression capacities according to the two different rotational directions of the driving shaft (300). The rotary compressor includes: a driving shaft (300) with an eccentric portion (310) on which a roller (400) rotates along an inner circumference of the cylinder (100), a vane... Agent: Birch Stewart Kolasch & Birch

20080107557 - Oil pump: An oil pump includes a housing including a rotor receiving portion at an inner side and an inner rotor accommodated in the rotor receiving portion formed at the housing. The inner rotor includes a plurality of outer teeth sequentially arranged at an outer peripheral side and integrally rotating about a... Agent: Darby & Darby P.c.

05/01/2008 > patent applications in patent subcategories. archived by USPTO category

20080101973 - Scroll fluid machine: A scroll fluid machine is capable of readily providing a back-pressure chamber having an increased pressure-receiving area and yet capable of being reduced in size. A fixed scroll member is secured to a casing. An orbiting scroll member is provided at a position facing the fixed scroll member. A holder... Agent: Wenderoth, Lind & Ponack, L.L.P.

20080101972 - Single-way valve for scroll compressor: A single-way valve is used for scroll compressor. The single-way valve includes a stage, a valve disc and a baffle plate. The stage includes a panel and a guiding post connected to the panel, where a plurality of apertures is defined on the panel. The valve disc includes a through... Agent: Hdsl

20080101974 - Rotary compressor: A rotary compressor for preventing, to the maximum extent possible, oil within the compressor from being discharged to a gas discharge port. The rotary compressor includes a drive device and a compression device which are mounted in a hermetic container. The hermetic container includes an upper cover formed with a... Agent: Staas & Halsey LLP

20080101975 - Vane pump: An oil supply groove 12 in communication with a pump room 2A is formed above a bearing 2B of a housing 2, and an open air groove 14 in communication with an atmospheric air is formed at a position rotated around the bearing 2B by 90° from the oil supply... Agent: Flynn Thiel Boutell & Tanis, P.C.

20080101976 - Rotary compressor: A rotary compressor includes a cylinder body, end plate members fitted on both sides of the cylinder body, a roller placed in a cylinder chamber, a blade fitted to the roller, and a bushing for supporting the blade. A width of the bushing in a roller axis direction is larger... Agent: GlobalIPCounselors, LLP

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