E - Fixed Constructions – 05 – F
Patent
E - Fixed Constructions
05
F
342/40, 342/2.2
E05F 15/18 (2006.01) E05F 15/16 (2006.01) E05F 15/20 (2006.01) H02H 7/085 (2006.01) E05F 15/00 (2006.01)
Patent
CA 1164983
ABSTRACT OF THE DISCLOSURE A motor for operating the door is controlled for forward and reverse rotations and stoppage by a control circuit responsive to an operation command signal, an upper-lower limit signal, an obstruction detection signal and a maximum drive time over signal, thus controlling the door stepwise for opening, stoppage, closing, stoppage and opening in that order. ? n generation of an obstruction detection signal or a maximum drive time over signal during the closing operation, the control circuit controls the motor in a manner to open the door for a certain period of time, and subsequently upon application of an operation command signal, the control circuit is set in a manner to open the door again.
381461
Matsuoka Shigeru
Suzuki Mitsuo
Tokunaga Takeshi
Yamauchi Koji
Yonekura Seiji
Hitachi Ltd.
Kirby Eades Gale Baker
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