Self-closing vent assembly

Details Self-closing vent assembly Self-closing vent assembly

2007-03-19

2008-08-19

Gorman, Darren W (Department: 3752)

Fire extinguishers

Apparatus which isolates flames from non-burning area

C454S069000, C454S357000

Reexamination Certificate

active

07413024

ABSTRACT:
A self-closing vent has its frame and a honeycomb screen coated with an intumescent material. When affixed to a wall with an opening the vent is normally open, allowing free flow of air through the opening, but when exposed to the heat of a fire, the intumescent material expands to close the vent, thereby preventing spread of the fire through the opening. The intumescent material preferably is FireFree 88, in a coating thickness of about 5 to 15 mils. In one preferred embodiment the vent opening is in a vehicle, between an engine compartment and a passenger space.

REFERENCES:
patent: 2279791 (1942-04-01), Lamb
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patent: 4093818 (1978-06-01), Thwaites et al.
patent: 5749948 (1998-05-01), Scholz et al.
patent: 5957211 (1999-09-01), Geuken et al.
patent: 6130381 (2000-10-01), Keith et al.
patent: 6256948 (2001-07-01), VanDreumel
patent: 6752714 (2004-06-01), Mann
patent: 1500913 (1978-02-01), None
patent: 2107183 (1983-04-01), None

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