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Shape memory alloy thaw sensors

United States Patent

5,735,607
April 7, 1998
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A sensor permanently indicates that it has been exposed to temperatures exceeding a critical temperature for a predetermined time period. An element of the sensor made from shape memory alloy changes shape when exposed, even temporarily, to temperatures above the Austenitic temperature of the shape memory alloy. The shape change of the SMA element causes the sensor to change between two readily distinguishable states.
Shahinpoor; Mohsen (Albuquerque, NM), Martinez; David R. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
08/ 567,683
December 5, 1995
This invention was made with Government support under Contract DE-AC04-94AL85000 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.