Expansible chamber devices inventions 02/08

20080041225 - Oscillating piston machine: An oscillating piston machine comprises a housing in which a first and at least a second piston are arranged, which pistons can rotate together in the housing about a rotational axis which is fixed to the housing and which pistons, as they rotate about the rotational axis, carry out reciprocating... Agent: St. Onge Steward Johnston & Reens, LLC

20080034959 - Radial piston pump with a roller plunger: A radial piston pump has a pump housing (1) and at least one pump unit (2) with a pump piston (3) and a cylinder (4) wherein the pump piston (3) can be mounted such that it can be moved backwards and forth, wherein the pump unit (2) can be driven... Agent: Baker Botts L.L.P. Patent Department

20080034961 - One piece cast ferrous crown piston for internal combustion engine: A one-piece piston having an investment or other permanent or non-permanent mold/die precision cast piston crown, rod flange and piston skirt. The piston crown has a relative constant thickness, a flange requiring minimal machining and a skirt providing for a wall with a support against the angular shifting of the... Agent: Wegman, Hessler & Vanderburg

20080028925 - Piston-cylinder unit: A piston-cylinder unit has a cylinder, at least one pressure chamber, a piston that can be moved in the cylinder and that delimits the at least one pressure chamber, at least one pressure port leading to the pressure chamber, a pressure-limiting line in the piston leading from one side of... Agent: Macmillan, Sobanski & Todd, LLC

20080028927 - Variable displacement swash plate type compressor with smooth inclined moving feature: Disclosed is a variable displacement swash plate type compressor with a smooth inclined moving feature which includes a cylinder block having a plurality of cylinder bores, a front housing disposed at a front end of the cylinder block to form a swash plate chamber, a drive shaft rotatably supported in... Agent: Needle & Rosenberg, P.C.

20080028929 - Piston: A number of embodiments of a piston may have a shape that provides enhanced piston guidance. In such embodiments, the piston shape may include an axial profile that is configured to provide certain thrust load characteristics.... Agent: Fish & Richardson P.C.