Thermal protection device and method
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United States of America Patent
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Aug 12, 2014
Grant Date -
May 10, 2012
app pub date -
Sep 26, 2011
filing date -
Nov 5, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A solenoid valve for use in a hazardous environment requiring a surface temperature of the valve to not exceed a cutoff temperature, the valve comprising coil configured to physically move an armature using an field generated by the coil; a thermal cutoff device having a fusing temperature above the cutoff temperature; and a heating resistor sized and configured to raise thermal cutoff device's temperature to the fusing temperature before the surface temperature exceeds the cutoff temperature. A method of constructing a solenoid valve for use in a hazardous environment requiring a surface temperature of the valve to not exceed a cutoff temperature, the method comprising the steps of: selecting a thermal cutoff device having a fusing temperature above the cutoff temperature; and selecting and configuring a heating resistor to raise thermal cutoff device's temperature to the fusing temperature before the surface temperature exceeds the cutoff temperature.
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