Patent ID: 7191596

Claim:
A Stirling engine comprising: at least two cylinders, a first cylinder including a first piston and a second cylinder including a second piston, arranged in series; a drive shaft that connects the first piston and the second piston; a first connecting shaft that connects a piston pin, which is arranged on the first piston, and the first piston; a second connecting shaft that connects a piston pin, which is arranged on the second piston, and the second piston; and a heat exchanger that includes a radiator, a regenerator, and a heater, wherein: at least a part of the heat exchanger is formed in a curved shape so as to connect the first cylinder and the second cylinder, an output of the Stirling engine is taken out through the drive shaft, if a first distance is a distance between a top of the first piston and the drive shaft when the first piston is at top dead center, and a second distance is a distance between a top of the second piston and the drive shaft when the second piston is at top dead center, then the first distance is not equal to the second distance, a difference between the first distance and the second distance is equal to a difference between lengths of the first connecting shaft and the second connecting shaft, and the difference between the first distance and the second distance is by at least a length of the radiator.