Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Movably interconnected
Patent
1975-02-21
1977-02-22
Kannan, Philip C.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Movably interconnected
160201, 160236, E06B 312
Patent
active
040087450
ABSTRACT:
A sectional door having a plurality of horizontally elongated and substantially rectangular panels having their adjacent horizontally extending edges hingedly connected to permit movement of the door between a closed substantially vertical position and an open substantially horizontal position. Each panel includes an elongated section member formed from a thin sheetlike material and having a generally channel-shaped cross-section. The section member has opposed leg portions of short length interconnected by a web portion which has a width several times greater than the length of the leg portions. The web portion includes a stiffening portion formed centrally thereof and extending longitudinally throughout the length of the section member. The stiffening portion is of a channel-shaped cross section which opens outwardly in a direction opposite to the channel-shaped section member. The channel-shaped stiffening portion has a depth which is at least approximately 70% of the depth of the panel.
REFERENCES:
patent: 2959221 (1960-11-01), Clapsaddle, Jr.
patent: 2993572 (1961-07-01), Rich
patent: 3648755 (1972-03-01), Thiele
patent: 3891021 (1975-06-01), Geoffrey
Kannan Philip C.
Overhead Door Corporation
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