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COMPACT VALVE

  • US 20100139785A1
  • Filed: 07/26/2006
  • Published: 06/10/2010
  • Est. Priority Date: 07/26/2005
  • Status: Active Grant
First Claim
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1. A compact valve that opens and closes a fluid path with utilizing transformation of a shape memory ally due to energization heating, characterized by thatthe 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 whereinthe 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.

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