Self-closing vent assembly
US7413024B1 · kind B1 · utility
62Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2007 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Mar 19, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2007/0025
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.