Abstract: A differential pressure piston-combustion chamber system for barreled or tube-firing weapons or guns with a regeneratively-actuated propellant injection device for the generation of propellant gases of liquid, in particular hypergolic propellant components. A differential pressure piston is arranged so as to be axially movably in the weapon housing coaxially relative to the weapon barrel, with the piston incorporating propellant infeed passageways as well as a loading piston which is in communication with filling passageways. In the cylindrical shaft of the differential pressure piston, there is concentrically arranged a charging piston which is movably axially relative thereto, where the free end is in communication with infeed passageways, and the differential pressure piston and the charging piston are provided with control rolls which, respectively, roll along as associated control cam track on a drum controller.

Abstract: A sealing arrangement for differential pressure piston-combustion chamber systems, which serve for the generation of propellant gases for barreled firearms from liquid, in particular hypergolic propellant components (hypergolic diergoles), and which are constructed with a differential pressure piston or ram located in the weapon housing, which is axially movable in coaxial relationship with the weapon barrel, and which includes a support piston projecting into the hollow shaft of the differential pressure piston, as well as propellant infeed and propellant discharge passageways. The combustion chamber which connects to the weapon barrel widens conically at a relatively flat angle, and in which the head of the differential pressure piston (injector), which is provided with overflow passageways and nozzles, has its external contour correlated with the cone of the combustion chamber. Hereby, the conically-shaped outer wall or shell surface of the injector can incorporate annular recesses, grooves or the like.