SMA actuator with improved temperature control

Smart memory alloy control

Solar differential temperature motor

Solar energy converting device and power supply system...

Solar energy power generation system

Solar powered free-piston stirling engine

Solenoid operated check valve

Solid state engine using nitinol memory alloy

Solid state engine with alternating motion

Solid state heat engine

Solid state thermal engine

Solid state thermal engine

Solid stress motor

Space reversible differential temperature engine

Spherical Stirling engine

Spindle drive with expansible chamber motors

Split memory element

Spring and resonant system for free-piston Stirling engines

Stabilized free-piston stirling cycle machine

Start-up and control method and apparatus for resonant free pist