Fire door method of operation
US9175513B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Mar 3, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/6818
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention presents a method to permit emergency egress through an access opening covered by an overhead coiling fire door. Upon receiving an alarm notification from a first detector located on one side of the access opening the door is power closed to a predetermined height and held there for the predetermined time, then power closed to a fully closed position. Upon receiving a second alarm notification from a second detector located on the opposite side of the access opening the door enters into a secondary alarm condition. The door is power closed and awaits notification to initiate a secondary emergency egress sequence. The secondary emergency egress sequence comprises receiving a door opening notification, opening the door, holding the door open for a predetermined time, and reclosing the door. Upon primary power restoration or a return to a non-alarm condition the door returns to its preset open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.