Abstract: A heat engine, in particular an ORC engine, includes a crankcase and at least one working cylinder connected to the crankcase, in which cylinder a working piston that is rigidly connected to a piston rod can be moved and the end of the piston rod facing away from the working piston is articulatedly connected to a connecting rod by crosshead running in the longitudinal direction of the piston rod. The interior of the working cylinder, which is supplied with a working medium, is separated from the interior of the crankcase, which is supplied with oil, by two walls, each of which has a sealing through-opening for the piston rod.

Abstract: The invention relates to an assembly of an ORC engine with a crosshead for the articulated connection of a piston rod of a piston, which is guided in a working cylinder, to a connecting rod of the ORC engine, wherein the crosshead is movable in a guide in the longitudinal direction of the piston rod. The crosshead can be detached from the connecting rod in the direction of the working cylinder without complete or partial dismounting of the guide. By means of the guide, free space can be left for the dismounting of the crosshead with axial displacement of a connecting-rod pin, and/or the crosshead can be broken down into parts for dismounting purposes.

Abstract: A heat engine, in particular an ORC engine, includes a crankcase and at least one working cylinder connected to the crankcase, in which cylinder a working piston that is rigidly connected to a piston rod can be moved and the end of the piston rod facing away from the working piston is articulatedly connected to a connecting rod by a crosshead running in the longitudinal direction of the piston rod. The interior of the working cylinder, which is supplied with a working medium, is separated from the interior of the crankcase, which is supplied with oil, by two walls, each of which has a sealing through-opening for the piston rod.