Patents Assigned to Techno Corporation
  • Surge protection valve
    Patent number: 4195657
    Abstract: A damper valve is disclosed having a hollow body and two valve plates controlled by a velocity sensitive linkage allowing the passage of normal system velocity, but closing when the velocity exceeds normal flow rates as would occur with an air surge caused by a tornado. The mechanism is made up of a three bar trip linkage connected to the valve plate in such manner so that when the linkage roller arm is held in the lower position by the cam seat, the valve plates (damper blades) are held in open position.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: April 1, 1980
    Assignee: Techno Corporation
    Inventor: William A. Pysh