Shape memory tubular deployment system
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United States of America Patent
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Dec 8, 1998
Grant Date -
N/A
app pub date -
Nov 15, 1996
filing date -
Nov 15, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Tubes made from shape memory alloy (SMA) assume their original shape when heated to their austenite finish temperature by directing photo-thermal or electrical energy inside parts of the tube using an optical fiber or conductors, the remainder of the tube acting as a heat sink. Using this method of photo-thermal heating or joule heating, virtually any predetermined shape can be made from tubes, or objects having tubular passages, in a controlled manner with very little heat being transferred to the material surrounding the outside of the tube. The optical fiber may also be used to detect the transformation of the material at the heated site from martensite to austenite and the temperature of the heated site, and use this information to control deployment of the device and reduce overheating of the tube and the material surrounding the outside of the tube.
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