Movable or removable closures – Time controlled – Predetermined delay governs start of closure movement
Patent
1995-09-29
1997-10-07
Dorner, Kenneth J.
Movable or removable closures
Time controlled
Predetermined delay governs start of closure movement
E05F 1520
Patent
active
056735146
ABSTRACT:
A time delay release mechanism has a brake actuator including an actuation member movable between engaged and released positions. The actuation member, when in the engaged position, operatively engages a fire barrier for preventing closure thereof. The actuation member, when in the released position, is operatively disengaged from the fire barrier such that the release mechanism does not prevent closure thereof. The brake actuator includes an actuation driver which, when receiving electrical power, moves the actuation member to the released position. A timer, when receiving electrical power or when power thereto is interrupted for a duration less than a predetermined time period, disengages from the actuation member allowing the actuation driver, when power thereto is initially interrupted, to move the actuation member to the engaged position. The timer engages the actuation member, when power to the timer is interrupted for a duration greater than the predetermined time period, to move the actuation member to the released position thereby overriding the actuation driver to allow closure of the fire barrier. The timer disengages from the actuation member when power to the timer is restored and the actuation driver retains the actuation member in the released position when power to the actuation driver is restored, thereby automatically resetting the brake actuator and timer.
REFERENCES:
patent: 4130156 (1978-12-01), Wardlaw
patent: 4426639 (1984-01-01), Jessup
patent: 4428278 (1984-01-01), Sutton
patent: 4738052 (1988-04-01), Yoshida
patent: 4785293 (1988-11-01), Shearer et al.
patent: 5245879 (1993-09-01), MKeon
patent: 5261186 (1993-11-01), Saino
Dorner Kenneth J.
McKeon Rolling Steel Door Company, Inc.
Redman Jerry
LandOfFree
Time delay release mechanism for a fire barrier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Time delay release mechanism for a fire barrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time delay release mechanism for a fire barrier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2348384