Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – With mounting or supporting means
Patent
1994-08-10
1996-11-26
Johnson, Blair
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
With mounting or supporting means
49197, 16198, E05F 1100
Patent
active
055775446
ABSTRACT:
An extension spring overhead door system in which the spring may be quickly and easily placed in tension with the door in a closed position. A spring tensioning device is provided which eliminates the need for multiple installers to lift the full weight of the door and then clamp or otherwise prop the door in an open position. An extension spring containment tube is also provided which surrounds the entire periphery of the spring to fully contain the entire length of the extension spring.
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Carper Kenneth E.
Leist Alan R.
Clopay Building Products Co., Inc.
Johnson Blair
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