Rotary expansible chamber devices inventions 10/07

20070248481 - Adjustable rotary pump with reduced wear: A rotary pump having a variable delivery volume, comprising: a casing; a delivery chamber formed in the casing; at least one delivery rotor which is rotatable in the delivery chamber; an actuating member which is arranged facing a front face of the delivery rotor or surrounds the delivery rotor, and... Agent: Ratnerprestia

20070248480 - Multiple section external gear pump with the internal manifold: A multiple section, expandable external gear pump is disclosed that includes a single inlet in communication with each gear set without a manifold disposed external to the casing. The pump also includes a single outlet in communication with each gear set without an outlet manifold disposed external to the pump... Agent: Miller, Matthias & Hull

20070248482 - Internal gear pump: An internal gear pump comprises a pump housing formed with a gear receiving recess, a pump cover coupled with the pump housing to cover the gear receiving recess, a hydraulic passage that uses the gear receiving recess as a passage part thereof, and annular inner and outer gears operatively installed... Agent: Foley And Lardner LLP Suite 500

20070243091 - Pump rotor seal apparatus and method: An improved pump and pumping method includes a circumferential positive displacement pump having two counter rotating rotors. A clearance gap is defined between the rotor shaft, and a body hub portion of the body that forms the chamber.... Agent: Baker & Hostetler LLP

20070243092 - Compressor: An object is to provide a highly efficient compressor while improving a refrigerant leakage, enhancing a performance of a compressor, improving durability, and enhancing reliability. The compressor comprises: a compression element comprising a cylinder in which a compression space is constituted; a suction port and a discharge port which communicate... Agent: Kratz, Quintos & Hanson, LLP

20070243093 - Compressor: An object is to inhibit a refrigerant leakage and enhance a performance of a compressor. The compressor comprises a driving element stored in a sealed container of the compressor, and a compression element driven by a rotary shaft of the driving element. This compression element comprises a cylinder in which... Agent: Kratz, Quintos & Hanson, LLP

20070243094 - Vane pump: A vane pump can effectively utilize the total quantity of a working fluid delivered from a vane section. The pump can be used for fluid pressure operated equipment requiring a high flow rate, does not create torque loss due to a throttle valve, and can prevent the occurrence of cavitation... Agent: Michael L. Crapenhoft C/o Hiroe & Associates

20070237664 - Backflow preventing apparatus for compressor: A backflow preventing apparatus for a scroll compressor is disclosed, in which a check valve is hinge-coupled to a valve seat, or is coupled to a valve seat so as to be elastically opened and closed. The check valve is opened and closed by a pressure difference and its own... Agent: Ked & Associates, LLP

20070237665 - Gerotor apparatus for a quasi-isothermal brayton cycle engine: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to... Agent: Baker Botts L.L.P.

20070237666 - Low noise gear pump: A low noise gear set for use generally and preferably with a power plant having an engine driving a pump connected to a low pressure fluid source, generating high pressure fluid at an output. The idle gear meshes with the drive gear along two points of the profile of the... Agent: William J. Clemens, Esq. Fraser Clemens Martin & Miller LLC

20070231171 - Displacement type compressor: A displacement type compressor includes a compressing mechanism section for performing a compression, a motor for driving the compressing mechanism section, and a crankshaft adapted to be driven in rotation by the motor to rotate the compressing mechanism section. The motor includes stator cores and having claw-type magnetic poles formed... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070231172 - Scroll fluid machine: A scroll fluid machine comprises compression chambers defined with an orbiting scroll orbiting relative to a fixed scroll, and a back pressure chamber provided on the face opposite from a wrap of the orbiting scroll. A back pressure port is provided, which is formed in an end-plate of the orbiting... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070231173 - Scroll compressor: A scroll compressor includes a fixed scroll, an orbiting scroll structuring an operation chamber for a fluid with the fixed scroll and compressing the fluid in the operation chamber by orbiting relative to the fixed scroll, a shaft having an eccentric portion connected to the orbiting scroll and receiving a... Agent: Buchanan, Ingersoll & Rooney PC

20070231174 - Scroll fluid machine: In a scroll fluid machine, an orbiting scroll is revolved with respect to a fixed scroll in a housing. A self-rotation-preventing device is provided to prevent the orbiting scroll from rotating on its own axis. The device comprises a pair of holders, one of which is disposed in an orbiting... Agent: Joel D. Skinner, Jr. Skinner And Associates

20070231169 - Gear pump and method of producing the same: In a gear pump equipped with a pump assembly formed from a driving gear supported by a driving shaft, a driven gear supported by a driven shaft, a pair of side plates disposed at both sides in an axial direction of driving and driven shafts, and a seal block that... Agent: Foley And Lardner LLP Suite 500

20070231170 - Drive shaft for a compressor: A compressor drive shaft may include a first journal portion, a second journal portion, and an intermediate portion disposed therebetween. The first journal portion, second journal portion, and intermediate portion may form a non-linear body portion. The non-linearity may be formed by the first journal portion extending at an angle... Agent: Harness, Dickey & Pierce, P.L.C

20070231175 - Scroll type fluid machine: The present invention provides a scroll type fluid machine having a driving system including a counter weight and a sub weight, in which an efficiency of an assembling operation is enhanced by simplifying an assembling structure of the driving system. In the fluid machine, a sub weight 17 is provided... Agent: Wenderoth, Lind & Ponack, L.L.P.

20070231176 - Internal gear pump: The invention relates to an internal gear pump including: a rotor member including an outer rotor provided with inner teeth to which a torque supplied from a driving device is transmittable; an inner rotor provided with outer teeth engageable with the inner teeth of the outer rotor so to be... Agent: Mcginn Intellectual Property Law Group, PLLC

20070231177 - Pump device: A bearing is located with movement of an outer race in the longitudinal direction of a drive shaft being restricted, and the drive shaft is fixed to an inner race 51c with the press fit, so that, it is possible to prevent the drive shaft from escaping. In addition, the... Agent: Posz Law Group, PLC

20070231178 - Drive shaft for a compressor: A compressor drive shaft may include a first bearing portion, a second bearing portion, and an intermediate portion disposed therebetween. The intermediate portion may include a continuous, nonlinear, central axis in an unloaded state.... Agent: Harness, Dickey & Pierce, P.L.C

20070231179 - Structure for preventing cavitation erosion of oil pump: A Structure of an oil pump for preventing occurrence of cavitation erosion on a region of the very small side gap between the side face of the pump gear and the side wall face of the pump case without reduction in volumetric efficiency of the pump can be provided. A... Agent: Wenderoth, Lind & Ponack, L.L.P.