Nitinol heater elements
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United States of America Patent
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-
Jun 25, 2002
Grant Date -
N/A
app pub date -
Jul 10, 1998
filing date -
Jul 10, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrical resistive heating system having a Nitinol heater element in the form of wire, rod strip or tube, is flexible, ductile, tough aid chemically non-reactive. The element has connectors at each end for leads from a controller that controls the flow of current through the heater element from a source of electrical power. The Nitinol heater element is treated to have an electrically insulating surface that is also hard and chemically non-reactive, so the heater element can be put in intimate contact with the materials or substrate to be heated without shorting or electrical shock to people or equipment. The controller uses temperature data feedback from a separate temperature sensor such as a thermocouple, or uses the resistance of heater element itself as a temperature sensor, since the resistance of the Nitinol changes with temperature in a predictable way.
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