Method and apparatus for regulating the closing speed of a rolling fire door
US6123134A · kind A · utility
33Cited by
37References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1999 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Apr 7, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/808
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mechanism for regulating the closing speed of a rolling fire door during an emergency condition. The speed regulating mechanism includes a viscous speed governor which is operatively connected to the support shaft of the fire door for providing a speed regulating damping torque as the door moves to a closed position. Methods for regulating the closing speed of a fire door during an emergency condition are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.