| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-return valve for supporting valves at an extremely weak spring constant using shape-memory alloys of rust-proofing Nickel-Titan (Ni-Ti) alloy or the like. SOLUTION: In a non-return valve device having a structure which elastically pressure-welds a globe as a valve element to the valve seat which is the entrance side of a fluid, three or more shape-memory alloys made linear members are erected from the exit side to the entrance side so as to be located at regular intervals in the periphery of the central axis of the valve seat, and each linear member keeps the inward curving part bent to the center as it goes to the top end from a base fixed end and the outward curving part bent by the curve so as to depart from the center, following the inward curving part. The non-return valve is characterized in that the globe is supported so as to pressure-weld to the valve seat elastically by the outward curving part of the three or more linear members. COPYRIGHT: (C)2008,JPO&INPIT
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