Movable or removable closures – With specified means to effect emergency release to closure
Patent
1993-04-27
1994-12-06
Kannan, Philip C.
Movable or removable closures
With specified means to effect emergency release to closure
49252, 49260, 49261, 49506, E05B 6510, E05D 1530
Patent
active
053699122
ABSTRACT:
A door which can be automatically opened and closed can have an additional releasable connection for allowing the door panels to be manually opened by disengaging the door panels from the device for automatically opening and closing the doors. In particular, two-panel doors which execute a combined sliding and rotational motion around a vertical axis of rotation during the closing and opening motion can be configured with such a device to make it possible to use the doors in evacuation and emergency routes, i.e. routes in which a manual force can be applied from inside to open the door panels. Further, so that the door does not remain open, there can also preferably be switches or circuits in the construction which indicate that a manual opening of the door panels has occurred, in which case an electronic signal can be generated to place the drive device in motion, to thereby automatically restore the connection between the door panels and the drive system.
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Bertoldo Giovanni
Ginzel Lothar
Dorma GmbH & Co. KG
Kannan Philip C.
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