Expansible chamber devices inventions 03/08

20080072751 - Piston apparatus, stirling engine, external combustion engine, and fluid device: A piston apparatus which configures an air bearing by introducing a compressed working media into an inside of a piston, and ejecting the working media from plural holes arranged on a circumferential portion of the piston into a clearance between the piston and the cylinder, which prevents a back-flow of... Agent: Oliff & Berridge, PLC

20080066615 - Two piece cast ferrous crown piston for internal combustion engine: This invention relates to an articulated two piece piston designed for reciprocable movement within a combustion chamber of an internal combustion engine. The piston has a crown of high-strength ferrous material that is precision cast net to finished dimensions on all inner and outer surfaces to provide a controlled thickness... Agent: Wegman, Hessler & Vanderburg

20080060510 - Variable pump or hydraulic motor: The invention concerns a variable pump or hydraulic motor with a drive axis with a first axis of rotation and first plungers connected to the drive axis and rotatable around the first axis of rotation. A port plate mounted in the housing can rotate around an axis intersecting the first... Agent: St.onge Steward Johnston & Reens LLC

20080060511 - Adjustable stop assembly for a piston-cylinder unit: The invention concerns an adjustable stop assembly, for limiting a stroke, designed for a piston-cylinder unit comprising a cylinder and a piston having a rod, said stop assembly serving to limit the stroke of a lifting device on a forklift truck. Said assembly has a clamping ring (2) axially slidable... Agent: Cahn & Samuels LLP

20080060512 - Actuator: The present invention provides an actuator including: an ignition device having an igniter main body fixed to an igniter collar, a cylinder connected to the igniter collar, the cylinder having a first sliding chamber located in a position facing the ignition device and a second sliding chamber formed in a... Agent: Birch Stewart Kolasch & Birch

20080060514 - Composite piston for an internal combustion engine: The invention relates to an assembled piston (1) for an internal combustion engine, said piston consisting of an upper part (4) provided with a combustion cavity (8), and a lower part (5) that is screwed to the upper part (4) by means of a screw (6) which is arranged coaxially... Agent: William Collard Collard & Roe, P.C.