Patent ID: 7600501

Claim:
A method for increasing power output in a device, the method comprising providing a cylinder, inside of which is a lever piston pivoted to make a reciprocating motion and a rotating piston mounted eccentrically on a shaft to make a complete rotating motion while engaging the lever piston, and the rotating piston being hollow or manufactured from a material lighter than a pressurized liquid medium used in the device, and the cylinder also including an inlet opening leading into a work chamber of the cylinder for opening and closing of the inlet opening by the lever piston and an exhaust opening leading out of an exhaust chamber of the cylinder for opening and closing of the outlet opening by the rotating piston, introducing the pressurized liquid medium into the cylinder during an operating cycle, at least at a lower dead center position of the rotating piston, and moving the rotating piston by a buoyancy of the pressurized liquid medium to move the rotating piston essentially to at least an upper dead center position of the rotating piston.