Patent ID: 7681549

Claim:
An oscillating piston engine, comprising an internal combustion engine part having a first housing part a first and at least a second piston arranged in at least one first piston cage in said first housing part such that the pistons are able to jointly revolve in said first housing part about an axis of rotation fixed in relation to said first housing part, and further being able, when revolving about said axis of rotation, to perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to said axis of rotation, said first piston having a first end face and said at least second piston having a second end face facing said first end face, said first and second end faces delimiting a working chamber in direction of oscillation of said pistons, an electromotive part adjoining said internal combustion engine part in direction of said axis of rotation, said electromotive part having a second housing part adjoining said first housing part of said internal combustion engine part, at least one rotor arranged in said second housing part concentrically with said axis of rotation; wherein a drive/output shaft, which is connected to said at least one rotor of said electromotive part via a transmission arrangement, is arranged parallel to and set apart from said axis of rotation.