Electric door lock openable by key

Details Electric door lock openable by key Electric door lock openable by key

2005-08-30

2005-08-30

Gall, Lloyd A. (Department: 3676)

Locks

Special application

For closures

C070S149000, C070S189000, C070S218000, C070S224000, C070S277000

Reexamination Certificate

active

06935149

ABSTRACT:
An electric door lock includes a handle rotatably attached to a housing, a lock device engaged in the housing, a follower rotatably secure the handle to the housing, an electromagnetic control device having a receptacle rotatably received in the follower, a plunger slidably engaged in the receptacle and extendible out of the receptacle to engage with the follower, and a latching device for selectively latching the plunger to the receptacle. The plunger may be selectively actuated to engage with the follower either by the lock device and correct keys or by the electromagnetic control device with correctly entered passwords or secret codes.

REFERENCES:
patent: 3176754 (1965-04-01), Macios
patent: 4429556 (1984-02-01), Kambic
patent: 4656850 (1987-04-01), Tabata
patent: 4936122 (1990-06-01), Osada
patent: 5027629 (1991-07-01), Liu
patent: 5113675 (1992-05-01), Uyeda
patent: 5447047 (1995-09-01), Lin
patent: 5475996 (1995-12-01), Chen
patent: 5934117 (1999-08-01), Shen
patent: 6286347 (2001-09-01), Frolov
patent: 6487884 (2002-12-01), Constantinou
patent: 6640594 (2003-11-01), Yao

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