Patents Assigned to Concentric Controls Limited
  • Flame failure devices
    Patent number: 4832070
    Abstract: The invention provides a flame failure device in which the reservoir exposed to the flame is charged with air and is communicated via a capillary tube to displace a membrane and hold the main valve in an open position, and the valve is closed by a spring when pressure falls as a result of the flame being extinguished. The system is re-charged via a one-way valve when pressure in the system falls below ambient pressure.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: May 23, 1989
    Assignee: Concentric Controls Limited
    Inventors: Robert James, Peter D. Roberts