Flexible or portable closure – partition – or panel – Automatic control
Patent
1999-03-29
2000-12-05
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Automatic control
160 9, 160133, E05F 1520
Patent
active
061553247
ABSTRACT:
A method and apparatus according to various aspects of the present invention is configured to automatically reset a rollable fire door curtain in the raised position. In one embodiment, a brake is coupled to a rolling fire door axle by an electromechanical clutch. The fire door is pre-disposed to unroll and close the opening, however, the brake prevents the door from unrolling. When a switch, a signal, or a fusible link indicates that the fire door should close, an electromechanical circuit board sends an electrical signal to an electromechanical clutch which opens the clutch. With the clutch open, the brake is no longer coupled to the fire door and the door closes. When the switch or signal is reversed, the clutch closes, re-coupling the fire door axle to the brake. The brake allows input rotation in both directions, but prevents the rolling door from closing under its own weight. Therefore, upon raising the curtain, the fire door is automatically reset and ready to close in the event of a fire.
REFERENCES:
patent: 1515372 (1924-11-01), Smith
patent: 1628011 (1927-05-01), Tompkins
patent: 2564208 (1951-08-01), Michelman
patent: 4147197 (1979-04-01), Bailey et al.
patent: 4664170 (1987-05-01), Labelle
patent: 5129442 (1992-07-01), Warner
patent: 5263527 (1993-11-01), Marlatt et al.
patent: 5353859 (1994-10-01), Oltahfer et al.
patent: 5839555 (1998-11-01), Hsieh
patent: 5893234 (1999-04-01), McKeon
patent: 6055885 (2000-05-01), Shea
Cookson Richard Gordon
Elliott Edward John
Johnson Blair M.
The Cookson Company
LandOfFree
Apparatus and method for operating a door does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for operating a door, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for operating a door will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-952279