Patent ID: 7077098

Claim:
A four-cycle, multi-chamber rotary internal combustion engine, comprising: a stator having a right-prism-shape exterior body and a hollow core formed by two concentric cylindrical surfaces which fluently transit one into the other via a ramp surface; wherein the ramp surface being generally parallel to a radial plain of the stator; a rotor having a cylindrical body of the same height as of said stator and an external diameter corresponding to a diameter of a smaller concentric surface forming the hollow core of said stator; wherein said rotor has at least one radial rectangular groove along the rotor whole height; at least one vane-type piston having a rectangular body with the same height as of said rotor and being positioned in said at least one radial rectangular groove of said rotor; wherein said at least one vane-type piston is provided with a means of moving in a radial direction within said grooves of said rotor with an outer face tightly contouring an inner surface of said stator; said rotor being positioned in said stator concentrically to cylindrical surfaces forming the hollow core thereof, and at least one side cover lid of said stator.