Fire and smoke damper

Details Fire and smoke damper Fire and smoke damper

1980-09-22

1982-06-15

Caun, Peter M.

Flexible or portable closure, partition, or panel

Automatic control

E05F 1520

Patent

active

043345700

ABSTRACT:
A motorized fire and smoke damper for an air passage is disclosed. The damper includes a wrap spring clutch used to automatically open and close a multifold curtain to define an opening in the passage. The clutch is normally connected to a stationary member by a fusible link, which restrains a portion of the clutch to enable the clutch to transmit torque to rotate a windup pulley and thereby raise or open the curtain. In the event of fire, the fusible link melts, whereupon the spring clutch no longer transmits torque and the pulley automatically freewheels to lower or close a raised curtain under its own weight or by spring bias. The passage opening is then closed. When desired, the air passage can be reopened by energizing the clutch to rotate it until it engages an adjacent finger, at which point the spring clutch can again transmit torque to the pulley and open the curtain.

REFERENCES:
patent: 3580321 (1971-05-01), Root
patent: 3646877 (1972-03-01), Ellis
patent: 3665996 (1972-05-01), Roberts
patent: 3752208 (1973-08-01), Roberts
patent: 3866656 (1975-02-01), McCabe
patent: 4161204 (1979-07-01), Kurz

Affiliated with

Also associated with

Rating

Fire and smoke damper 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 and smoke damper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire and smoke damper will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1915251