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Shape memory alloy/shape memory polymer tools

  • US 6,872,433 B2
  • Filed: 03/27/2001
  • Issued: 03/29/2005
  • Est. Priority Date: 03/27/2001
  • Status: Expired due to Fees
First Claim
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1. An apparatus for minimally invasive applications, said apparatus having a longitudinal axis with said apparatus extending in a radial direction from said longitudinal axis and said apparatus being activated by a change in temperature, comprising:

  • a first unit comprising a first structure for at least positioning said apparatus, said first structure including a quantity of shape memory alloy and a second unit comprising a second structure for at least positioning said apparatus, said second structure including a quantity of shape memory polymer, said first unit comprising said first structure including said shape memory alloy having a longitudinally extending coiled configuration with more than one wrap, and said second unit comprising said second structure including said shape memory polymer comprising a cylinder, wherein said first unit is positioned in said second unit such that changes in temperature of said shape memory alloy causes said first unit to change position by a radial contraction and a longitudinal extension and to stretch said second unit comprising said second structure including said shape memory polymer along said longitudinal axis.

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