Patent ID: 8011346

Claim:
A compressed gas rotary engine with piston comprising, a housing formed with a peripheral wall which contains a cylindrical inner wall attached to side walls at 90 degrees, inner surface of said housing's peripheral wall being cylindrical, a cylindrical rotor, rotatable mounted in said housing and having a circular peripheral wall, side walls at 90 degrees to said peripheral rotor wall, with one side wall having means to be attached to an engine's shaft which protrude through the center of the said housing side walls and the other said side wall having a central opening, and one or more circular cylinder chambers extending from the said rotor's peripheral wall to the central chamber of said rotor, said rotor having means to seal one said cylinder chamber from the other cylinder chambers and the said central chamber, piston with piston rods for each said chamber, said piston rod contain a bearing, said pistons reciprocally mounted and forming variable volume in said cylinder chamber and has means to seal the cylinder chamber from the central chamber of said rotor, means to guide the reciprocal motion of said piston and means to rotate the rotor, said housing being provided with means admitting a compressed gas by means of a gas valve communicating with said cylinder chambers, means discharging expanded gas communicating with said cylinder chambers, means to guide the said rotor's motions in said housing, said cylinder chambers of varying sizes enabling an expansion of compressed gas to take place and expansion of said chambers due to the pressure of said compressed gas.