Lock

Details Lock Lock

2005-07-19

2005-07-19

Mah, Chuck (Department: 3676)

Locks

Special application

For closures

C070S208000, C070S210000, C070S475000

Reexamination Certificate

active

06918273

ABSTRACT:
A lock for a door comprises a casing, a bolt operable to extend from or retract into the casing, a pivoted operating handle operable at one side of the door to retract the bolt, lock means for key operation at the other side of the door, and blocking means to prevent operation of the handle to retract the bolt. In a locked closed position of the door, the bolt is extended, and with the blocking means operated, key operation of the exterior lock means both retracts the bolt and also de-actuates the blocking means. At the inside of the door further key operable lock means are provided solely to operate and, if required, to de-actuate, the blocking means.

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