Patent ID: 8376725

Claim:
A rotary piston machine comprising at least one annular conduit ( 1 ) curved along an at least partial arc and in which a piston ( 2 ) is movably supported in a movement-imparting fluid that flows in via a fluid connection ( 3 or 4 ) and flows out via another fluid connection ( 4 or 3 ), the piston being coupled via a lever ( 5 ) to a rotating body arranged concentric to the arc and coaxial to a rotation axis of the piston, with the lever ( 5 ) routed to pass through to the rotating body through a sealed gap in a wall of the annular conduit ( 1 ) and extending in a movement direction of the piston ( 2 ), wherein sealing components ( 13 ) are inserted into a gap region between the lever ( 5 ) and wall sections adjoining on both sides, to prevent an escape of the fluid, wherein the lever ( 5 ) and the wall sections of the annular conduit ( 1 ) adjoining both sides of the gap have reciprocally engaging complementary holding structures with holding forces oriented in opposition to an opening of the gap.