Patent ID: 8402938

Claim:
An internal combustion engine comprising: a cylinder comprising a top wall portion, a side wall portion, and a bottom opening; a piston configured to travel through the cylinder, the piston comprising a top plate portion and a side plate portion extending from the top plate; a rotatable receptacle provided on inner surface of the side plate portion of the piston; a rotating connector engaging rotatably in the rotatable receptacle, the rotating connector comprising two rotational axles, two radial arms extending from the rotational axles, and an off-center middle axle connected to the two radial arms, wherein the two rotational axles share a common axis and are parallel to the off-center middle axle; a crankshaft disposed below the cylinder; and a connecting rod comprising a upper end and a lower end, wherein the upper end is rotatably connected to the off-center middle axle of the rotating connector and the lower end is rotatably connected to the crankshaft, wherein the internal combustion engine goes through an engine cycle comprising an intake phase, a compression phase, a expansion phase, and a exhaust phase, wherein during the intake phase the piston travels from a top dead center of the cylinder to a first bottom dead center of the cylinder, wherein during the compression phase the piston travels from the first bottom dead center of the cylinder to the top dead center of the cylinder, wherein during the expansion phase the piston travels from the top dead center of the cylinder to a second bottom dead center, wherein during the exhaust phase the piston travels from the second bottom dead center of the cylinder to the top dead center, wherein the piston reaches the first bottom dead center when the off-center middle axle of the rotating connector rotates downward to a lowest point, and wherein the piston reaches the second bottom dead center when the off-center middle axle of the rotating connector rotates upward to a highest point.