SMOKE REMOVER Russian patent published in 2003 - IPC

FIELD: smoke removal from story rooms of house through air-funnel wall apertures. SUBSTANCE: device has loop, shutter resting on axle by means of bends and on loop walls through supporting holes. It also has holder with drive, weight coupled by means of grip with holder and by means of lever, with shutter, stop, and spacer. In addition it is provided with chute secured on shutter over its perimeter. Slit is made in front wall. Spacer is disposed in chute and comes in contact with loop through slit. Supporting holes are oval in shape and they are arranged on walls in inclined position; stop is mounted on loop above aperture. Lever is hinged to shutter. Weight is mounted on lever for controlling its position relative to stop and for engaging both stop and holder, the latter through grip. EFFECT: improved performance characteristics. 2 dwg