Patent ID: 8443600
Filing Date: 2013-05-21
Classification: E05B,F03G,F05C

Abstract:
1. An actuator employing elements made of a shape memory alloy comprising: a first element made of a shape memory alloy capable of modifying its shape upon heating, having a stationary first end and a second end linked to a controlled mechanical part; heating means for heating said first element made of a shape memory alloy; bias means for allowing return of said first element to its original shape during cooling, the bias means having a first end connected to the second end of said first element and a second end connected to an inner restraint of the actuator; and moving means capable of moving said inner restraint of the actuator to increase a load applied onto said bias means when external temperature exceeds a value M wherein said moving means capable of moving said inner restraint of the actuator is such to autonomously react to an increase of the external temperature.