Patent ID: 8522732

Claim:
An internal combustion barrel engine, comprising: an engine housing having a first end and an opposite second end; an elongated longitudinal output shaft disposed in the engine housing and defining a longitudinal axis of the engine; a plurality of cylinders defined in the engine housing and disposed about the longitudinal output shaft, each of the cylinders having a cylinder axis that is generally parallel to the longitudinal axis of the engine, each of the cylinders having a closed end adjacent the first end of the housing and an opposite open end; a cam plane being defined perpendicular to the longitudinal axis and disposed between the open ends of the cylinders and the second end of the engine housing; a cam plate disposed in the engine housing and supported for rotation about the longitudinal axis, the cam plate having a central portion and a cam portion extending outwardly therefrom, the cam portion having at least one cam surface that undulates from one side of the cam plane to the other; and a flywheel having a plurality of lobes, each lobe being disposed generally in alignment with an area where the cam surface undulates closest to the open end of a cylinder.