Rotary expansible chamber devices inventions 01/07

20070020133 - Stator for an eccentric single-rotor screw pump and method for its production: Stator for an eccentric single-rotor screw pump has a casing made of steel or the like and a helical elastomer lining. Stator and a method for its production are described which can also be made with larger lengths at low production costs. Stator is composed of at least two stator... Agent: Shlesinger, Arkwright & Garvey LLP

20070014681 - Retrorotating, post-rotating and birotating prime movers: The current invention has as objective to complete our works relative to motor machines by generalizing certain support methods, such as that by poly inductive mechanics, by hoop gear, as well as generalizing the realization criteria of motor machines, showing mainly that the degrees of mechanic rotativity of them can... Agent: Ogilvy Renault LLP

20070009371 - Scroll compressor with an eccentric pin having a higher contact point: A scroll compressor assembly includes a shaft having an eccentric pin that orbits a first scroll member relative to a second scroll member. The eccentric pin has a length extending from a base end to a distal end, which defines a contact area having a slight crown that engages a... Agent: Carlson, Gaskey & Olds, P.C.

20070009372 - 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

20070003422 - Unit for delivering fuel to an internal combustion engine: A roller cell pump having a shaped sliding surface composed of elliptical portions results from two different equations. The function of the unit is improved because the equations are modified and include adaptable parameters, so that by adaptation of the parameters, the shaped sliding surface can be adapted in portions... Agent: Ronald E. Greigg Greigg & Greigg P.l.l.c.

20070003423 - Variable capacity rotary compressor: A variable capacity rotary compressor has a simplified structure to reduce manufacturing costs and assembling time thereof and is capable of easily and conveniently performing a capacity-changing operation. The variable capacity rotary compressor includes first and second compression chambers having different capacities, a rotary shaft disposed through the first and... Agent: Stanzione & Kim, LLP

20070003424 - Scroll compressor with enhanced lubrication: Lubrication of bearing surfaces in a scroll compressor is enhanced by a vent arrangement which makes use of increased centrifugal force, achieved by locating the outlet of the vent arrangement radially outside of the nominal circumference of the compressor's drive shaft, to both remove refrigerant gas from compressor locations where... Agent: William J. Beres Trane

20070003425 - Rotary fluid machine: A rotary fluid device includes a cylinder having an annular cylinder chamber and an annular piston, which is disposed in the cylinder chamber to be eccentric relative to the cylinder. The annular piston divides the cylinder chamber into an outer working chamber and an inner working chamber. A blade is... Agent: GlobalIPCounselors, LLP