FLOOR SMOKE REMOVING VALVE Russian patent published in 1994 - IPC

FIELD: fire prevention. SUBSTANCE: valve has flap which is supported by axle through bendings, holder with a drive for fixing the flap in a closed position, load and rope link. The valve has guides with vertical and inclined sections respectively, and also rollers fastened to the side end of the flap in its lower part. Shaped slots are made on bendings. The load is made in the form of massive rollers mounted in slots by additional axle. The rope link connects load roller to a ring through block and cantilever axle for gripping the holder. EFFECT: improved structure. 1 dwg