Self-closing vent assembly

A - Human Necessities – 62 – C

Patent

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Details

A62C 2/06 (2006.01) A62C 3/07 (2006.01)

Patent

CA 2681672

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.

L'invention porte sur un évent à auto-fermeture qui a son cadre et un écran en nid d'abeilles revêtus d'un matériau intumescent. Lorsqu'il est apposé à une paroi comportant une ouverture, l'évent est normalement ouvert, permettant un écoulement d'air libre à travers l'ouverture, mais lorsqu'il est exposé à la chaleur, le matériau intumescent subit une expansion pour fermer l'évent, empêchant ainsi la diffusion du feu par l'ouverture. Le matériau intumescent est, de préférence, du FireFree 88, avec une épaisseur de revêtement d'environ 5 à 15 mm. Dans un mode de réalisation privilégié, l'ouverture de l'évent se situe dans un véhicule, entre un compartiment moteur et un compartiment passager.

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