Patent ID: 9609995
Date: 2017-04-04
CPC Classifications: A47L,H01H

Claim:
1. An actuator device, comprising a support structure which is stationary in the operation, an actuation member, displaceable relative to said structure, biasing means tending to maintain the actuation member in a rest position, a wire made of a shape-memory material, having a first end connected to said structure, and the other end connected to the actuation member, and an electric circuit for supplying in a controlled manner an electric current to said shape-memory wire, said circuit comprising a pair of terminals carried by said structure, for connection to an external control circuit, one end of the shape-memory wire being connected with a first terminal of said pair; wherein said electric circuit comprises an electric switch including a first conducting member electrically connected to the second terminal of said pair, and a second conducting member carried by the actuation member and electrically connected to the other end of the shape-memory wire; the arrangement being such that said switch is closed when the actuation member is in the rest position, and remains closed until when the actuation member reaches a working position, said switch opening when the actuation member passes beyond the working position.