Patent ID: 7937939

Claim:
A thermodynamic cycle heat engine comprising: a regenerator; first and second chambers in fluid communication with said regenerator; first and second rotors disposed within said first chamber, said first and second rotors forming at least a pair of spaces within said first chamber; third and fourth rotors disposed within the second chamber; at least one actuator; and, wherein said regenerator and said first and second chambers form at least a portion of a closed space for a working fluid, wherein said at least one actuator is arranged to displace said first and second rotors about an axis of rotation for said first and second rotors and to displace the third and fourth rotors about an axis of rotation for the third and fourth rotors, wherein at least a portion of said at least one actuator is fixedly secured to said first and second rotors, wherein the first rotor is displaceable with respect to the second rotor and the third rotor is displaceable with respect to the fourth rotor, and wherein no more than two rotors are disposed in the first chamber and no more than two rotors are disposed in the second chamber.