Expansible chamber devices inventions 06/07

20070144341 - Piston assembly: A hydraulic pump includes a housing, at least two pistons mounted to the housing to rotate relative to the housing, and a transition arm coupled to each of the pistons to rotate therewith. The transition arm is set at a predetermined angle relative to a longitudinal axis of the pump.... Agent: Fish & Richardson P.C.

20070144342 - Hydraulic linear actuating drive: A hydraulic linear actuating drive includes a cylinder, a movable servo piston that can be pressure-loaded and that runs inside the cylinder, at least one piston rod attached to the servo piston, and at least one piston gasket having at least two sealing elements at a distance from each other.... Agent: Darby & Darby P.C.

20070144343 - Piston for an internal combustion engine: A piston for an internal combustion engine, which performs a sliding reciprocating motion in a cylinder, and a method for producing the piston. The piston has a piston head and a piston skirt having at least one bearing surface. The at least one bearing surface is provided at least in... Agent: William Collard Collard & Roe, P.C.

20070131108 - High precision hydraulic synchronous and proportional flow dividing and flow collecting apparatus: A high precision hydraulic synchronous and proportional flow dividing and flow collecting apparatus comprises two hydraulic motors having the same displacement and their crankshafts be connected into one crankshaft. The two hydraulic motors have a common oil inlet port, and have an individual oil exhaust port respectively. In the casing... Agent: GlobalIPServices

20070131109 - Airless sprayer with hardened cylinder: An airless sprayer for paint or the like consists of an electric drive unit connected to a piston. Driven by the electric drive unit, the piston reciprocates within the cylinder, thus spraying the paint or the like. Because of the close tolerance between the piston and cylinder (typically about 0.0002... Agent: Briggs And Morgan P.A.

20070125227 - Tubular piston for a piston engine and method of manufacturing the same: The invention relates to a hollow piston (1) for a piston engine, said hollow piston comprising a peripheral wall (3a), a central rod (11), a front wall (3b) on the front end thereof, and an articulated part 4a) on the rear end thereof The inventive hollow piston (1) has an... Agent: Scully, Scott, Murphy & Presser, P.C.