Closure fasteners – Bolts – Double acting
Patent
1998-11-19
1999-12-28
Pham, Teri
Closure fasteners
Bolts
Double acting
292 63, E05C 500
Patent
active
06007115&
ABSTRACT:
A door lock assembly comprising a housing that is received in a mortise in the door with a bolt that is retractable into the housing to permit opening of the door and extendable from the housing to secure the door in its closed position. The bolt has a first portion received within the housing. A second portion is pivotally attached to the first portion so that the second portion can pivot with respect to the first portion when the bolt is extended from the housing, thus permitting opening of the door without the use of a key or rotation of a doorknob. A latch mounted within the opening of a door frame is selectively moveable from a first position engaging the second portion of the bolt when the door is closed in order to prevent the second portion of the bolt from pivoting with respect to the first portion, thus locking the door in the closed condition. When the latch is moved to its second position the second portion of the bolt can pivot with respect to the first portion to allow the door to be opened.
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