CRANKSHAFT-LINK PISTON MACHINE Russian patent published in 2010 - IPC F01B9/02 F02B75/00 

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly to piston machines and mechanisms for conversion of their pistons motion into rotation of shaft. The piston and link in the piston machine are connected between them by means of a hinged joint at least with a flat hinge ensuring the piston to self-centre along surface of the cylinder due to travel relative to the link in any direction in plane crossing a lengthwise axis of the cylinder. Side support elements with contact surfaces and tooth racks are arranged on interacting surfaces of the link and the case receiving reactive torque. Rollers are installed between contact surfaces of side support elements; also the rollers are equipped with synchronising tooth gears engaged with the tooth racks of the side support elements; at least two rollers are installed on each side of the link. Also support elements and rollers are installed with preliminary constriction of interacting contact surfaces of the support elements and rollers.

EFFECT: increased reliability of machine operation and its resource, of specific weight-dimension indices and improved efficiency.