Patent ID: 8152504

Claim:
A positive displacement rotary machine, comprising: a body with an internal sphere-like working surface, conventionally divided into bypass and propulsion areas, a rotor with a working surface of rotation, rotatably mounted in the body, a ring working cavity, formed by the working surfaces of the body and the rotor, a C-shaped separator, mounted in a part (along rotation of the rotor) of the ring working cavity at an angle to a plane of the rotor rotation and fixed at the body, wherein the working cavity is partitioned by the separator into two parts at the bypass area of the body, and working medium inlet and outlet openings are located from the opposite sides of the separator, wherein at least one slot is made on the working surface of the rotor, mainly along a geometrical axis of the rotor rotation, in each slot of the rotor is mounted a piston closing off (sealing) the working cavity and performing rotational oscillations in a slot plane, and wherein the piston is made at least in the form of a part of a disk and there is at least one through-cutout for a separator passage, and a means for closing off the piston through-cutout at the propulsion area of the body.