Patent ID: 8141475

Claim:
A piston machine, comprising a housing, a first piston arranged in said housing and having a first end face, said first piston being movable to and fro to perform reciprocating movements, a second piston arranged in said housing and having a second end face, said second piston being movable to and fro to perform reciprocating movements in opposite direction with respect to said reciprocating movements of said first piston, a working chamber arranged between said first and second end faces, said working chamber periodically increasing and decreasing in size upon said reciprocating movements of said first and second pistons, a guiding element arranged on at least one of said first and second pistons, a curve member arranged in said housing and extending concentrically and circumferentially about an axis of revolution fixed relative to said housing, said curve member being arranged radially outside of said first and second pistons with respect to said axis of revolution, said curve member being rotatable about said axis of revolution, while said first and second pistons being not-rotatable about said axis of revolution, a control curve formed on said curve member, said guiding element being in engagement with said control curve, wherein said reciprocating movements of said first and second pistons are derived independently of each other in a plane of movement which is fixed relative to said axis of revolution upon rotation of said curve member about said axis of revolution.