Automatic deadbolts

Details Automatic deadbolts Automatic deadbolts

1994-09-19

1996-05-14

Lindsey, Rodney M.

Closure fasteners

Adjustable backset

292337, 292DIG4, 292DIG60, E05C 100

Patent

active

055161600

ABSTRACT:
An automatic door latch has a case with a bolt movable within the case between a fully extended position in which the bolt extends forwardly of the case, a fully retracted position in which the bolt is within the case, and a partially extended position in which the bolt is positioned to contact a door strike. There is a spring which urges the bolt toward the fully extended position. There is a bolt operator for moving the bolt, against the spring, from the fully extended position toward a retracted position. There is a release mechanism which holds the bolt in the partially extended position and which is effective to release the bolt for movement, under urging by the spring, to a fully extended position, from the partially extended position, upon inward movement of the bolt when it is in the partially extended position.

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patent: 4765663 (1988-08-01), Raymond et al.
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patent: 4854619 (1989-08-01), Nakauchi
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patent: 4945737 (1990-08-01), Hart
patent: 5044182 (1991-09-01), Totten

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