Fire and smoke rated fabric door
US9133663B2 · kind B2 · utility
4Cited by
35References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2013 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Aug 29, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62C2/22
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A vertically coiling door assembly that is used for emergency egress. Upon notice of a predefined alarm state, after a delay the door deploys by gravity, stopping upon contact with an obstruction. The door may be lifted at any time without power and after a set amount of lift powered movement is triggered moving the door to a preset height, pausing the door at that height, and then resuming gravity deployment. In the total absence of power the door may still be lifted, with resumption of gravity deployment upon removal of the lifting force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.