US Patent 7467606 Elliptical rotary motor with internal combustion

A method and an apparatus include a motor housing (1), an internal space cylindrical rotor (2) rotating together with radial placed work cylinder (3) and piston (6), a connecting rod (7) and a connecting axle (9) connected with oscillating lever (8), and a pin (10) to transfer rotary moment to the internal space cylindrical rotor (2), and output shafts (17) and (20). Simultaneously, connecting rod (7), via connecting axle (9) by its own motion, moves satellite gears (12), which off-center mounted swinging bearing rings (13) and symmetrically geared to off-center mounted inner tooth gears (11), define position of radial placed work cylinder (3) being relative to two outer dead centers and two inner dead centers.