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Shape memory alloy actuator

  • US 20050160858A1
  • Filed: 01/21/2005
  • Published: 07/28/2005
  • Est. Priority Date: 07/24/2002
  • Status: Abandoned Application
First Claim
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1. A shape memory alloy actuator comprising:

  • a body displaceable between a first and a second position, releasable holding means adapted for holding said body in said first position, at least one first and at least one second wire made of a shape memory alloy such as nitinol, said first wire being at one end connected to said body such that shortening of the length of said first wire exerts a force on said body for moving said body from said second to said first position, and a biasing means, selected from the group consisting of at least one of a tension spring, a compression spring, a flat spring and a piston and cylinder mechanism, arranged and adapted for biasing said body for moving said body from said first to said second position, said second wire having one end connected to said holding means such that shortening of the length of said second wire releases said holding means for allowing said biasing means to move said body from said first position to said second position.

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