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Rotary expansible chamber devices June invention type 06/10

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.
06/24/2010 > patent applications in patent subcategories.

20100158728 - Vacuum pump: A multistage vacuum pump comprises a stator housing a multistage rotor assembly, each stage comprising inter-meshing Roots rotor components, wherein the tip radius of the rotor components at an inlet stage of the pump is larger than the tip radius of the rotor components at an exhaust stage of the... Agent: Edwards Vacuum, Inc.

20100158729 - Rotary expander: A rotary expander includes: a cylinder (61); a piston (62) disposed inside the cylinder (61); closing members disposed with the cylinder (61) being sandwiched therebetween; and an injection passage for introducing further a working fluid in the expansion process of the working fluid. An introduction outlet (65c) of the injection... Agent: Hamre, Schumann, Mueller & Larson P.C.

20100158730 - Compressor: A system is provided for maintaining the position of a valve in a compressor. The valve includes a valve body connected to a piston in a cylinder by a shaft. The valve body is positioned in the discharge outlet of the compressor based on the location of the piston in... Agent: Mcnees Wallace & Nurick LLC

20100158731 - Compressor having capacity modulation system: A compressor includes a first porting extending through an end plate of an orbiting scroll member at an angular extent of at least twenty degrees and first and second spiral wraps defining modulated capacity pockets when the orbiting scroll is in a first position. The first modulated capacity pockets may... Agent: Harness, Dickey & Pierce, P.L.C

20100158732 - Scroll type fluid machine: To provide a scroll type fluid machine which can ensure that even when the pressure ratio of the pressure P1 of its high pressure chamber (back pressure chamber) to the pressure P2 of its low pressure chamber (P1/P2) is low, its orbiting scroll be pressed against its fixed scroll without... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20100158733 - Oil-free scroll compressor: An oil-free scroll compressor prevents wraps from being broken and provides improved reliability. The oil-free scroll compressor includes an orbiting scroll member and fixed scroll members, and has compression channels into which water is injected each formed between the intake port and exhaust port provided in the fixed scroll member.... Agent: Antonelli, Terry, Stout & Kraus, LLP

20100158735 - Hydraulic machine: A hydraulic machine has a gear wheel (2) with outwardly extending teeth and a gear ring (4) with inwardly extending teeth formed by rollers each of which is supported in a pocket (8) in the gear ring, and pressurized spaces are formed between the gear wheel and the inwardly extending... Agent: Mccormick, Paulding & Huber LLP

20100158734 - Internal gear pump: In an internal gear pump of the present invention, a first angle that is formed by a first straight line that connects a rotation axis of an inner rotor to a tooth tip portion of an external tooth in the rotational direction of the inner rotor and an outer rotor,... Agent: Leason Ellis LLP

20100158736 - Lubricant circulation system: A lubricant circulation system (10) includes a lubricant supply cup (1) containing a lubricant (6) and having an oil return hole (13) connected to an oil return pipe (16) of a rotary equipment (5). A pump seat (2) is coupled to the lubricant supply cup (1) and includes a pump... Agent: Kamrath & Associates P.A.

20100158737 - Screw compressor: A screw compressor includes a casing, a screw rotor and a gate rotor. The casing has a cylinder. The screw rotor is cylindrical-shaped and configured to be fitted into the cylinder. The gate rotor is configured to be engaged with the screw rotor. A, outlet width of a seal surface... Agent: GlobalIPCounselors, LLP

20100158738 - Gear pump with unequal gear teeth on drive and driven gear: A gear pump comprises a first gear to be connected to a source of drive, and having a first plurality of gear teeth. A second gear has a second plurality of teeth engaged with the first gear teeth. The first gear teeth contact the second gear's teeth on a contact... Agent: Carlson, Gaskey & Olds, P.C.

20100158739 - Gear pump with slots in teeth to reduce cavitation: A gear pump comprises a drive gear being mounted for rotation about a first axis and having a plurality of gear teeth at a radially outer location. A driven gear is mounted for rotation about a second axis, and having a plurality of teeth at a radially outer location. The... Agent: Carlson, Gaskey & Olds, P.C.

20100158740 - Vane machine: The invention relates to a vane machine (500) for the expansion or compression of gaseous media, for example, air, exhaust gases of an internal combustion engine, vaporous media, or a mixture thereof, comprising a housing (505) with a cylindrical space and an inlet opening (510) and an outlet opening (520)... Agent: Lerner Greenberg Stemer LLP

06/17/2010 > patent applications in patent subcategories.

20100150760 - Rotary vacuum pump: The rotary vacuum pump includes a pump housing, a rotary shaft, a thrust movement restriction mechanism and a first elastic member. The pump housing has therein a pump chamber. The rotary shaft has thereon a rotor rotatably disposed in the pump chamber. When the rotor is rotated with the rotary... Agent: Woodcock Washburn LLP

20100150761 - Hydraulic machine: The invention relates to a hydraulic machine comprising a housing section with a housing, a commutation section and a gear wheel section, the gear wheel section comprising a gear wheel set with an internally toothed gear ring and an externally toothed gear wheel, which engage each other and form working... Agent: Mccormick, Paulding & Huber LLP

20100150762 - System for sealing the piston of rotary piston machines: A sealing system of rotary piston machines, the rotor excludes rotor discs which are arranged next to one another, and which are seated on the common rotor axle and are pressed apart from one another by acting spring and/or gas forces in the joints between the discs in such a... Agent: Jordan And Hamburg LLP

20100150763 - Rotary pump: A rotary pump device includes a stator chamber with a cylindrical inner wall having intake and exhaust ports therein, and a two-part, expanding rotor eccentrically mounted for rotation within the chamber. The rotor comprises two crescentoid bodies with end surfaces in sliding, mating contact. A spring rod is placed between... Agent: Northern Michigan Patent Law, PLC

20100150764 - Pump having modular shaft bearings and seals: An external gear pump including seals, bearings, bushing/seal housings, choke collars and shafts that are all removable for maintenance and/or replacement without removing either endplate or internals from the case assembly. The preferred pump includes four bearing caps that can be removed without removing the pump from its mounted position.... Agent: Caesar, Rivise, Bernstein, Cohen & Pokotilow, Ltd.

20100150765 - Interlocking device for holding body and flange of machines using bean-shaped dowels: An interlocking device for rigidly holding together the body (1) and flange (2) of a hydraulic machine comprises a body (1), flange (2), gears (12, 13), sealing means (7, 10) acting as a body seal and lobe seal adapted to effectively seal pressurized oil pockets within the hydraulic machine with... Agent: Jacobson Holman PLLC

20100150766 - Rotary sliding vane compressor and blade therefor: Disclosed is a blade for a rotary blade compressor. The blade has at least two section pieces, with any two adjacent section pieces being radially aligned with each other at a junction, wherein further there is a force applying means at said junction forcing the adjacent blade section pieces apart... Agent: Daniel Dejoseph Flsmidth Inc.

06/10/2010 > patent applications in patent subcategories.

20100143172 - Multistage compressor: A multistage compressor employing a gas injection system for CO2 cycle that attains enhancements of compression efficiency and compression performance. The multistage compressor is multistage compressor (2) for CO2 cycle (1) adapted to carry out two-stage compression involving emitting the CO2 refrigerant gas compressed by inferior-stage side rotary compression means... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20100143173 - Dual-plate swash pump: A swash-plate machine for pumping fluids uses dual swash plates in complementary or mirror-image orientation. The vibration that is generated as a reaction to forced nutatory motion imposed on a single swash plate is thereby largely cancelled. Rotated orientation of the divider plate position in one chamber with respect to... Agent: Young & Thompson

20100143174 - Rotary working machine provided with an assembly of working chambers and periodically variable volume, in particular a compressor: A rotary working machine is provided. The machine includes an assembly of working chambers with periodically variable volume disposed in a central block defining a stator. The inside surfaces of the stator direct a pendulum motion of one or more blade-type working elements disposed in respective one or more cylindrical... Agent: Brinks Hofer Gilson & Lione

20100143175 - Internal gear pump with optimized noise behaviour: An internal gear pump (1) for conveying a fluid by a driven pump gear wheel (3) and a ring gear (4), as a gear pair located within an enclosure, which at least partially mesh with one another. A sickle shaped part (5) is provided for sealing the free space located... Agent: Davis & Bujold, P.l.l.c.

06/03/2010 > patent applications in patent subcategories.

20100135835 - Variable-displacement vane oil pump: A variable-displacement oil pump wherein between a projection of a mobile ring and a corresponding driving chamber and between a protrusion (again of the mobile ring) and a corresponding guiding seat, respectively, there are placed corresponding devices adapted to decrease the effects of the friction between the projections on the... Agent: Ohlandt, Greeley, Ruggiero & Perle, LLP

20100135836 - Scroll compressor having capacity modulation system: A compressor may include a housing, orbiting and non-orbiting scroll members, a first porting, and a second porting. The first and second porting may each extend through the end plate of the non-orbiting scroll member and may each have an angular extent of at least twenty degrees. An ending point... Agent: Harness, Dickey & Pierce, P.L.C

20100135837 - Pump casing: The invention relates to a pump housing (2) comprising a dual-wall casing (3) which enables a first fluid (4) to flow at least partially around a compression chamber (5) for compressing a second fluid (6), said compression being performed with at least two elongated rotors (7, 8). The dual-wall casing... Agent: Oliff & Berridge, PLC

20100135838 - Power steering oil pump: A power steering oil pump may include a pump housing, a rotor that is equipped with a plurality of vanes and coupled to the pump housing to rotate therein, a cam ring inserted between the rotor and the pump housing to form a pumping space between the cam ring and... Agent: Morgan, Lewis & Bockius LLP (sf)

20100135839 - Screw compressor with integral bearing cover and discharge plenum divider: A three rotor screw compressor is provided with a bearing cover, and an integral discharge case having a divider wall formed integrally with the bearing cover. The bearing cover closes bearing chambers for each of three rotor shafts, and the divider wall divides a plenum into two distinct chambers. By... Agent: Carlson, Gaskey & Olds, P.C.

20100135840 - Screw compressor: A screw compressor comprising: a pair of male and female screw rotors; and an air-cooled heat exchanger, wherein the air-cooled heat exchanger is provided above a motor for driving the compressor body; wherein, with respect to a cooling wind for the air-cooled heat exchanger, the air-cooled heat exchanger is inclined... Agent: Crowell & Moring LLP Intellectual Property Group

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