Fire door and operator therefor

Details Fire door and operator therefor Fire door and operator therefor

1977-06-20

1979-04-03

Kannan, Philip C.

Flexible or portable closure, partition, or panel

Automatic control

With starting or driving means

160 8, B01D 122, B01D 114

Patent

active

041471970

ABSTRACT:
There is provided a roll-type door having horizontally positioned slats which is normally held by operator means in an open position against gravity. Said operator means includes fusible means responding to a predetermined heat level for releasing said door and permitting same to move under gravity in a closing direction. Said operator means includes a device for initiating said door movement immediately after the response of said fusible means to said heat level and further includes a connection to braking means for insuring against too rapid a descent by the door. The door may be manually opened if desired or mechanical means, power driven if desired, may be provided for opening or assisting in opening such door. In the latter case, clutch means are provided for disconnecting same immediately upon breakdown of said fusible means whereby said door will be enabled to close freely in response to gravity subject only to control by the above-mentioned braking means.

REFERENCES:
patent: 1275168 (1918-08-01), McCloud
patent: 1290169 (1919-01-01), Gervais
patent: 1290514 (1919-01-01), Collins
patent: 1617440 (1927-02-01), Duncanson
patent: 2038523 (1936-04-01), Cahill
patent: 2564208 (1951-08-01), Michelman

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1743017