Collapsible cascading impact-resistant door
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 28, 2000
Grant Date -
N/A
app pub date -
Mar 24, 1998
filing date -
Mar 24, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In general, A collapsible cascading overhead door assembly (10) for closing a vehicular access opening of a structure includes a flexible door panel member (12) made up of a plurality of rigid slat members (13) each having a pair of hinge tab members (25, 26). A pair of elongated track members (15) having a generally G-shaped cross-section are affixed to an opening jamb (11) of the building structure, the flexible door panel member (12) being slidably disposed in the track members (15). A pair of flag bracket members (17) are affixed to the elongated track members (15). A support enclosure (16) is mounted on the flag brackets (17) and is adapted to maintain the door panel (12) in the stored position. An elongated, polygonal-shaped drive wheel member (66) has a plurality of sides (76) of equal width approximating the width of the rigid slat members (13). The sides (76) are angularly interconnected with one another to form a plurality of angular engaging faces (77) at the junction of the sides (76) and also to form a hollow portion inside the drive wheel (66). A drive bracket (65) rotatably supports the drive wheel (66), the drive bracket (65) with the drive wheel (66) supported therein, being mounted in the support enclosure (16) adjacent to the track members (17). A counterbalance (67) is disposed in the hollow portion of the drive wheel (66). The flexible door panel member (12) is pivotally affixed in the support enclosure (16) and drapes over the drive wheel (66) such that the hinge tabs (25, 26) of one of the slat members (13) operatively engages the angular engaging faces (77) of the drive wheel (66) whereby rotation of the drive wheel (66) in a first direction serves to raise the door panel (12) in the track members (15) and causes the door panel (12) to double back on itself in the support enclosure (16), and rotation of the drive wheel (66) in a second direction serves to cascade the door panel member (12) out of the support enclosure (16) and to lower the door panel member (12) in the track members (15).
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