Propeller and piston combination for internal combustion engines

A propeller piston for internal combustion engines, comprising, in combination, a plurality of equally spaced-apart vanes, integrally formed on an end wall of said piston, providing rotation means for said piston, on a power stroke of said piston in its cylinder, a wrist pin removably received transversely through said piston, and through a swivel member of a connecting rod secured to a crankshaft of an internal combustion engine, wherein said plurality of vanes are integral with said end wall of said piston, and are urged into rotation by expanding hot gases on the power stroke of said piston, and said wrist pin is freely received through an opening extending through side faces of said swivel member, and wherein said piston rotates simultaneously with said vanes, by means of said swivel member, and said swivel member consists of a pin fixedly secured in one end of the connecting rod of said piston, which is journaled on a crankshaft at its opposite end, and an extending head of said pin is freely and rotatably received in a correspondingly-shaped opening in a base portion of said swivel member.