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Threaded load transferring attachment

  • US 6,425,829 B1
  • Filed: 12/06/1994
  • Issued: 07/30/2002
  • Est. Priority Date: 12/06/1994
  • Status: Expired due to Fees
First Claim
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1. A threaded load transferring device comprising:

  • a Nitinol element having threads therein for threaded attachment to another member;

    said threads in said Nitinol element being formed by forcing threads of a forming tool into said Nitinol element when said Nitinol element was at a temperature higher than the lowest temperature at which the ultimate yield strength of said Nitinol element is less than the yield strength of the material of which said forming tool was made;

    said Nitinol element is formed from a blank, said element having two end portions, each threaded for attachment between two relatively movable members; and

    an elongated integral intermediate portion between said end portions;

    whereby said intermediate portion can be heated to its transition temperature and undergoes a phase transformation and a shortening of the length of said intermediate portion, such that said threaded end portions, attached to said relatively movable members, exert a tensile force on said members to produce a desired motion.

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