Patent ID: 7815161
Filing Date: 2010-10-19
Classification: C08L,F16K,Y10T

Abstract:
1. A compact valve that opens and closes a fluid path with utilizing transformation of a shape memory alloy due to energization heating, characterized by that the compact valve comprises: a stationary structure of a cylindrical shape having an orifice that constitutes the fluid path; a moving structure that contacts an inner periphery of the stationary structure, and has a sealing member freely movable to seal the orifice; a wire formed of a shape memory alloy to move the moving structure; and a first electrode and a second electrode to hold the wire and to energize the wire, and wherein the moving structure is configured so that a length thereof is elastically variable, and is movable to seal the orifice by varying a length of the wire due to energization heating to the wire; and the moving structure elastically transforms when sealing the orifice, and thereby, a stress that the wire receives can be reduced.