Piston machine having a piston mounted on synchronously rotating crankshafts

A piston machine comprising the combination of

• a housing having means defining a working space, said means comprising two parallel walls and an interconnecting peripheral wall extending perpendicularly between said parallel walls, said peripheral wall having a cylindrical first chamber surface with a cylinder axis and first and second ends;
• a piston having a cylindrical second chamber surface for engagement with said first chamber surface to form a chamber of variable volume, said cylindrical second chamber surface having a cylinder axis and first and second ends and being movable with said piston relative to said first chamber surface;
• at least two identical crankshafts rotatably mounted in said housing perpendicular to said parallel walls and having crank pins rotatable in and supporting said piston, said crankshafts being coupled together for angular synchronous rotation;
• a first sealing element mounted on said piston at said first end of said second chamber surface and extending perpendicular to said parallel walls;
• a second sealing element mounted on said peripheral wall at said second end of said first chamber surface and extending perpendicular to said parallel walls,
• each of said first and second chamber surfaces being formed as a sliding surface to slidingly engage a sliding surface of said sealing element of the other of said chamber surfaces over the total length of said other of said chamber surfaces between said ends during a part of parallel rotation of said piston;
• means in said housing providing a high-pressure gas passage having a flow-controlling valve and an opening communicating with said chamber adjacent said sealing element at an end of said first sliding surface;
• and
• means in said housing providing a low-pressure gas passage communicating with said working space outside of said chamber.