US PATENT SUBCLASS 454 / 369
FIRE DAMPER
Current as of: June, 1999
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DEFINITION
Classification: 454/369
FIRE DAMPERS:
(under the class definition) Subject matter including valve means which act to shut off flow in a ventilating system in the event of a dramatic rise in temperature indicative of a fire.
(1) Note. These dampers are usually activated by fusible links, a portion of which melts due to the elevated temperatures incurred in a fire.
(2) Note. Many building codes require the use of fire dampers to prevent the spread of the fire through the ventilating system.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28, for a chimney or stacktop with air current regulating means which is temperature responsive.
257, for a building inlet airway including an emergency smoke or fire responsive valve.
342, for a building outlet airway including an air pump and having means for controlling or dealing with smoke.
357, for other building outlet airways having means for controlling or dealing with smoke. SEE OR SEARCH CLASS
126, Stoves and Furnaces,
287.5, for fusible release dampers for stoves or furnaces.
169, Fire Extinguishers, particularly
42, and 56+ for fire extinguishing apparatus responsive to smoke or fire.
