Patent ID: 6022271
Filing Date: 2000-02-08
Classification: A62C,F24F

Abstract:
A fire responsive, closing air vent, which consists essentially of:a) a substantially flat planar main frame enclosing an air flow passageway and adapted for attachment to a venting opening in a structure;b) a hingeable cover connected to said main frame and having a first, open position and a second, closed position;c) at least one spring which serves as a biasing means for biasing said cover towards said second, closed position; and,d) fire responsive means positioned at least in part between said frame and said cover so as to hold said cover in said first, open position, said fire responsive means being at least partially moveable in response to an increase in ambient temperature in excess of 140.degree. F. so as to cease from holding said cover in said first, open position and permitting said at least one spring to close said cover to said second, closed position.