140193 ⎘
Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having pistons and displacers in the same cylinder with free displacers
Preventing overstroke of free-piston stirling engine from loss of load
#2Two piston, concentric cylinder, alpha free piston Stirling machine
#3Thermal cycle engine with augmented thermal energy input area
#4Hot-gas engine