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FRANGIBLE SHAPE MEMORY ALLOY FIRE SPRINKLER VALVE ACTUATOR

  • US 20090095493A1
  • Filed: 01/24/2008
  • Published: 04/16/2009
  • Est. Priority Date: 01/25/2007
  • Status: Active Grant
First Claim
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1. A thermally-activated sprinkler valve assembly comprising:

  • a fluid passageway having an outlet and configured to connect to a source of pressurized fluid;

    a valve over the outlet, the valve configured to releasably oppose the force of the pressurized fluid; and

    a temperature-sensitive actuator coupled to the valve, the actuator comprising;

    a frangible bolt; and

    a shape-memory element capable of elongating at a pre-determined stress and temperature, wherein the frangible bolt applies compressive force to the shape-memory element;

    wherein the temperature-sensitive actuator is configured to actuate the valve by breaking the frangible bolt when the temperature of the shape-memory element reaches or exceeds the pre-determined temperature.

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