Patent ID: 8136503

Claim:
An internal combustion engine comprising: a first toroidal cylinder; a second intersecting toroidal cylinder of equal internal dimensions, a first rotatable piston assembly housed in said first toroidal cylinder; a second rotatable piston assembly housed in said second intersecting toroidal cylinder; at least one combustion chamber; and an output shaft; (a) wherein said first rotatable piston assembly further comprises: a first semi-circular piston affixed parallel inside an outer ring gear having a diameter; and said second rotatable piston assembly comprising a second semi-circular piston affixed parallel outside an inner ring gear having a diameter being smaller than the diameter of the outer ring gear, said outer ring gear being affixed to said first piston through a continuous sealed gap around an outer circumference of said first toroidal cylinder, and said inner ring gear being affixed to said second piston through a continuous sealed gap around an inner circumference of said second toroidal cylinder to isolate said first rotatable piston assembly; (b) wherein said intersecting toroidal cylinder further comprises a first intersecting junction and a second intersecting junction; wherein second intersecting junction said is 180 degrees opposite said first intersecting junction, wherein first intersecting junction said includes: at least one intake port positioned in said first toroidal cylinder and said second toroidal cylinder, and being opposingly disposed within said first intersecting junction, and at least one exhaust port positioned in said first toroidal cylinder and said second toroidal cylinder; (c) wherein said at least one combustion chamber is in common with said first toroidal cylinder and said second toroidal cylinder, and opposingly disposed within said second intersecting junction; (d) wherein said first semi-circular piston includes end plates slanted at approximately 45 degrees at each end, and wherein said second semi-circular piston includes end plates slanted at approximately 45 degrees at each end oriented in a complementary fashion to permit partial inclusion of said first semi-circular piston and partial inclusion of said second semi-circular piston within said second intersecting junction simultaneously; and (e) wherein said outer ring gear and said inner ring gear are mutually connected to each other through a differential gear train having a variable gear ratio to coordinate timing in said first rotatable piston assembly and said second piston assembly, and wherein said gear train is connected to said output shaft.