Patent ID: 8851044

Claim:
A rotary vane geared internal combustion engine comprising: a stator which has an internal cylindrical working area and intake and outlet openings, where two coaxial rotors with two vanes on each rotate to define four chambers separated by four vanes; and a reducing gear assembly having a main shaft, a shaft of an auxiliary device and a power shaft comprising two rotor shafts of the two coaxial rotors positioned between the main shaft and the shaft of the auxiliary device; the main shaft, the shaft of the auxiliary device and the power shaft each having a pair of two-tooth gears reciprocally positioned at a 90 degree angle relative to each other; a profile of the two-tooth gear having two convex arcs and two concave arcs, the convex arc of the two-tooth gear on one shaft adapted to mate with the concave arc of the two-tooth gear on the other shaft, one of the pair of two-tooth gears on the power shaft adapted to mate with one of the pair of two-tooth gears on the main shaft, and adapted to mate with one of the pair of two-tooth gears on the shaft of the auxiliary device, the other of the pair of two-tooth gears on the power shaft adapted to mate with the other of the pair of two-tooth gears on the main shaft, and adapted to mate with the other of the pair of two-tooth gears on the shaft of the auxiliary device.