Flexible or portable closure – partition – or panel – Plural and/or with rigid closure – Diverse types
Patent
1976-06-15
1978-01-10
Gilliam, Paul R.
Flexible or portable closure, partition, or panel
Plural and/or with rigid closure
Diverse types
A47H 100, E06B 332
Patent
active
040673774
ABSTRACT:
This invention relates to a fire and smoke damper assembly capable of being positioned in interruptive disposition relative to the flow of air through a conduit wherein the assembly includes a flexible curtain movably mounted on the frame and attached in driven relation to a curtain mounting rod rotatably mounted on the frame. The rod and curtain are driven manually by biasing means or by exteriorly mounted motor means. Curtain guide elements including a pair of screens are arranged in spaced, substantially parallel relation to one another across the face of the conduit so as to define a channel in which the curtain is movable relative to the screens into and out of engagement about the curtain periphery with the frame. In another embodiment the curtain is mounted on a rod and pulled therefrom by a negator spring to close the conduit, and in still another embodiment, the curtain is maintained in an extended or flattened condition in its open position and is pulled therefrom by a negator spring to its closed position.
REFERENCES:
patent: 917983 (1909-04-01), Wilson
patent: 1866882 (1932-07-01), Dixson
patent: 3085247 (1963-04-01), Bixby
patent: 3273632 (1966-09-01), McCabe
patent: 3306344 (1967-02-01), Youngs
patent: 3342243 (1967-09-01), Salter
patent: 3389737 (1968-06-01), Arnold et al.
patent: 3397009 (1968-08-01), Landenberger
patent: 3495606 (1970-02-01), Phillips
patent: 3747662 (1973-07-01), Kurz
Anemostat Products Division Dynamics Corporation of America
Gilliam Paul R.
Sakran Victor N.
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