Flexible or portable closure – partition – or panel – Roll type – With fabric reinforcements
Patent
1999-06-17
2000-11-28
Lev, Bruce A.
Flexible or portable closure, partition, or panel
Roll type
With fabric reinforcements
160 8401, 160265, 160271, A47G 502
Patent
active
061522074
ABSTRACT:
A tandem windbar system for a flexible curtain rollup door includes a first windbar adapted to be guided in opposed guide channels of a door assembly and supported by flexible strap members which are secured at one end to a rotatable drum for rolling a flexible curtain closure member onto and off of the drum to open and close the door. Opposite ends of the strap members are secured to stationary structure, such as the upper ends of opposed guide channels for the door curtain and the first windbar. A second windbar is supported below the first windbar by opposed flexible straps which are operably connected at one end to the first windbar by a bearing tube member which may rotate relative to and is supported on the first windbar. The straps of the second set are trained around and support the second windbar and are connected at their opposite ends to the curtain drum for rolling onto and off of the drum. The second windbar ascends and descends at 1.50 times the speed of the first windbar during opening and closing movements of the door curtain to position the second windbar midway between the first windbar and the lower edge of the door curtain in the closed position. The second windbar is also positioned directly adjacent the first windbar in an open position of the door and directly below the curtain support drum.
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Lev Bruce A.
Overhead Door Corporation
LandOfFree
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