Patents by Inventor Roger Gilbertson

Roger Gilbertson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Frangible Shape Memory Alloy Fire Sprinkler Valve Actuator
    Publication number: 20100025050
    Abstract: A temperature-activated valve for a conventional fire sprinkler utilizing a hyperelastic single-crystal shape memory alloy is described. The shape-memory element expands as it is heated, forcing a bolt to break, thereby opening the sprinkler valve. The devices described are less susceptible to accidental breakage than conventional actuators, and have fewer moving parts. Transition temperature of the shape memory alloy can be tuned to a narrow range.
    Type: Application
    Filed: January 24, 2008
    Publication date: February 4, 2010
    Inventors: Alfred Johnson, Roger Gilbertson, Valery Martynov