Patent ID: 7143737

Claim:
A rotary engine comprising: a cylindrical housing having an intake chamber and an exhaust chamber formed at the inner wall thereof, the intake and exhaust chambers being caved in the inner wall of the housing; a guiding member disposed at the center of the housing, the guiding member being formed in a semi-elliptical shape at intake and compression sections and in a semicircular shape at an exhaust section; a rotary member disposed in the housing such that the rotary member is rotatable along with a rotating shaft; pistons disposed in a plurality of operating chambers formed at the rotary member such that the pistons are rotatable about shaft rods ( 58 ), respectively, each of the pistons having a tail part contacting the outer circumference of the guiding member; shutoff valves engaged in a guide groove formed at the housing through guide rods inserted through intake/exhaust ports formed at the operating chambers of the rotary member; and an ignition plug disposed at the inlet of the exhaust chamber of the housing or at the intake/exhaust ports of the rotary member; and shutoff plates rotatably disposed at the outsides of the intake/exhaust ports of the rotary member, respectively, the shutoff plates being engaged in the guide groove of the housing through guide rods.