Burns, Doane, Swecker & Mathis
Stirling engine
 A Stirling engine includes an expansion cylinder, a compression cylinder, and a plurality of conduits which each extend between and connect the expansion cylinder and the compression cylinder. A plurality of heating portions are provided, each of which is disposed in one of the conduits in order to be connected with the expansion cylinder. A plurality of cooling portions are also provided, each of which is disposed in one of the conduits in order to be connected with the compression cylinder. A plurality of regenerative portions are also included, each of which is disposed in one of the conduits in order to connect one of the heating portions and one of the cooling portions. Each of the regenerative portions possesses a length according to the temperature of the working fluid in the corresponding heating portion. 
Aisin Seiki Kabushiki Kaisha
F F F F
F02G F02G F02G F02G
additional additional additional inventional
Hiroyuki Tetsumi Yutaka
Ohuchi Watanabe Momose