Flexible or portable closure – partition – or panel – Automatic control
Reexamination Certificate
2007-11-27
2007-11-27
Johnson, Blair M. (Department: 3634)
Flexible or portable closure, partition, or panel
Automatic control
C160S009000, C160S188000
Reexamination Certificate
active
10631315
ABSTRACT:
A fire door control system permits user input during regular use and during alarm conditions. The system utilizes primary and secondary power sources and incorporates a variety of preventive safeguards assuring that functionality of the fire door control system will not be lost. The system utilizes primary power when possible in all alarm conditions. However, during alarm conditions when primary power is lost or when a hand crank hoist remains dangerously engaged, the system is bumplessly connected to a secondary power source and a fire door of the system is closed with the aid of a clutch that directly connects the drive input with an axle that supports the fire door. The clutch pulses on and off to control the descent of the door. The system includes an electronic controller for coordinating the operation of elements of the system and for implementing a method of controlling a fire door system.
REFERENCES:
patent: 4002229 (1977-01-01), Washington
patent: 4785293 (1988-11-01), Shearer et al.
patent: 4904880 (1990-02-01), Yoshida
patent: 5022452 (1991-06-01), Burrell
patent: 5070442 (1991-12-01), Syron-Townson
patent: 5263527 (1993-11-01), Marlatt et al.
patent: 5576581 (1996-11-01), Iannuzzi et al.
patent: 5812391 (1998-09-01), Mehalshick
patent: 5850865 (1998-12-01), Hsieh
patent: 5896907 (1999-04-01), Dever et al.
patent: 6014307 (2000-01-01), Crimmins
patent: 6145571 (2000-11-01), Snyder
patent: 6155324 (2000-12-01), Elliott et al.
patent: 6273230 (2001-08-01), Nakano et al.
patent: 2003/0051829 (2003-03-01), Sears et al.
Johnson Blair M.
Newco Electronics Corporation
Schmeiser Olsen & Watts LLP
LandOfFree
Fire door control system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fire door control system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire door control system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3862342