Abstract: An expansion hose for power steering plants of motor vehicles. The hose includes an outer pressure hose (2) connected to an inlet side end member (1) and to an outlet side end member (3). An inner flexible hollow body (5) is arranged coaxially with pressure hose 2, and which at the inlet side is connected to a nipple plug (4) of the inlet side end member (1) and at the outlet side extends freely into the outlet side end member (3) in its outlet channel (6) with a radial clearance. The nipple plug (4) includes in addition to the axial passage (9) located at the center axial passages (10) at a radial distance outwardly therefrom and distributed circumferentially, and which lead into the annular space (8) between the outer pressure hose (2) and the inner flexible hollow body (5).

Abstract: A rotary piston machine consisting of several circular, axially in series, on a shaft mounted, piston rotors, each piston rotor having a piston running along an associated, stationary working chamber wall of a circular cylindrical working chamber and being in mating engagement wich a recess in at least one shut-off rotor in rolling contact with the piston rotor, and, wherein the shafts of the piston rotor and the shut-off rotor are coupled to each other by means of coupling gears, and in which the gaseous high-expanded and combustible medium is admitted to and discharged from the respective working chamber by one or more rotary valve rotating with said shaft. The rotary piston machine as a combustion steam motor operates such that, after ignition of the combustible operating medium, water is injected into the working chamber by means of one or more injection nozzles distributed around the inner circumference of said working chamber wall.