Fire and smoke free system for high rise building stairways
OwnerWilliam Francis Palmerinventor
Life of this patent
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Abstract
A fire and smoke free stairway in the event of fire in high rise buildings can be maintained by developing a velocity pressure of air through the fire doorway, from the fire stairway each time the door is opened during evacuation and without pressurizing the stairway significantly.
Claims1
A fire control device to maintain a smoke and fire free escape from a multi-floor building having a stair shaft, comprising an entrance door to the stair shaft from each floor, a first fan supplying a variable quantity of external air, in proportion to the number of entrance doors open, to said stair shaft when activated, a second fan directing a flow of air through the doorway of said entrance door when said door is opened.
Dependencies are inferred from the claim text.