A Stirling engine (10, 50, 72) comprising at least one working piston (52) and at least one displacement piston (4), wherein for a power control by the transmission of the linear movement of a drive part (2) into the linear movement of a driven part (8), a lever (5) articulately connected to the drive...http://www.google.co.uk/patents/US6729131?utm_source=gb-gplus-sharePatent US6729131 - Stirling engine
