Abstract: A prime mover which is constituted by a compressor casing having a combustion gas inlet, a compressor rotor rotatably mounted in the compressor casing and having at least one vane movable radially of the rotor and resiliently sealingly engaged with the inside surface of the wall of the compressor casing for forming a compression chamber therein, a prime mover casing adjacent the compressor casing and having an exhaust outlet therein and a spark plug mounted thereon, a prime mover rotor rotatably mounted in the prime mover casing and having at least one vane movable radially of the rotor and resiliently sealingly engaged with the inside surface of the wall of the prime mover casing for forming a combustion chamber therein, the rotors being connected for causing them to rotate together, and a passage opened and closed by the rotation of the rotors for passing compressed combustion gas from the compressor casing to the prime mover casing at predetermined intervals for being ignited by the spark plug.

Abstract: A rotary type internal combustion engine including a cylindrical rotor having a diametrical slot parallel with the longitudinal axis of the rotor and a vane movably mounted in the vane groove and constituted by two vane parts opposed to each other at the center of the vane in the radial direction thereof.