Electric door opener

Details Electric door opener Electric door opener

1987-05-01

1989-03-28

Moore, Richard E.

Closure fasteners

Keepers

With movable dog, catch or striker

E05B 4700

Patent

active

048157767

ABSTRACT:
An electric door opener with a changer freeing or blocking a latch is described, which changer is detachably engaged with an electromagnetically operable inner armature. An electromagnetically controllable locking device prevents disengagement of the inner armature from the changer, e.g. as a result of an impact. The locking device has a locking lever provided with a detent and a control edge. The lever engages a corresponding projection on the inner armature. An outer armature acting on the control edge initially deflects the locking lever to overcome the locking action and, after a predetermined forward movement, drives the inner armature to release the changer.

REFERENCES:
patent: 3819215 (1974-06-01), Fuss
patent: 4211443 (1980-07-01), Butts et al.

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