Arrangement to counteract or prevent spreading of fire or smoke

Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Means to regulate or vary operation of device

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Details

137253, 52168, F16K 900

Patent

active

044124775

ABSTRACT:
An arrangement to counteract or prevent spreading of fire, smoke or undesired gases through at least one passage, such as a ventilating duct, in a building. Said arrangement comprises a device adapted to keep the passage open normally but to close the passage when there is a risk of said spreading to occur. Said passage comprises at least one portion running in a drain trap-like path and said device comprises at least one supply means to supply, when there is a risk of said spreading to occur, a fluid to said drain trap-like portion in order to completely or partly fill the same while providing said closure of the passage.

REFERENCES:
patent: 1609525 (1926-12-01), Moldenhauer
patent: 3756137 (1972-02-01), Scharres
patent: 4075798 (1978-02-01), Tazaki

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