Flexible or portable closure – partition – or panel – Automatic control – With starting or driving means
Patent
1994-08-30
1996-08-06
Johnson, Blair
Flexible or portable closure, partition, or panel
Automatic control
With starting or driving means
160 1, 160 8401, 160188, E05F 1520
Patent
active
055424600
ABSTRACT:
The present invention is provided with a mechanism for controlling the opening and closing of a door comprising a speed reduction means for reducing a rotational speed. A high speed shaft is connected to the speed reduction means and is connectable to a means for rotating the input shaft, and a low speed output shaft is connected to the speed reduction means. A governor is mounted on the input shaft for limiting the rotational speed thereof, to also regulate the rotational speed of the output shaft. A brake is provided for preventing rotation of the output shaft, and a self-closing mechanism is operatively connected to the door. The self-closing mechanism is adapted for storing energy when the door is opened to an open position, and a connecting means operatively connects the output shaft to the self-closing mechanism. A releasing means is provided for releasing the brake to permit rotation of the output shaft under the urging of the self-closing mechanism whereby the self-closing mechanism releases the energy stored therein so as to close the door to a closed position when the brake is released by the releasing means.
REFERENCES:
patent: 4738296 (1988-04-01), Hatch
patent: 5203392 (1993-04-01), Shea
patent: 5355927 (1994-10-01), McKeon
Johnson Blair
McKeon Rolling Steel Door Company, Inc.
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