Door lock set with simultaneously retractable deadbolt and latch

Details Door lock set with simultaneously retractable deadbolt and latch Door lock set with simultaneously retractable deadbolt and latch

1991-05-28

1992-01-07

Gall, Lloyd A.

Locks

Special application

For closures

70DIG42, 292 36, E05B 5900

Patent

active

050779923

ABSTRACT:
A door lock includes a driving cam secured to a first spindle operatively retracting a latch, a follower cam secured to a second spindle operatively retracting a dead bolt and a linking rod having a first pin formed on a rod end pivotally connected with a cam protrusion formed on the driving cam and having a second pin formed on the other rod end slidably moving in an arcuate slot in the follower cam, whereby upon a rotation of an inside knob for rotating the driving cam for retracting the latch, the linking rod will be biased to pull the follower cam for rotating the follower cam to retract the dead bolt for simultaneously retracting both the deadbolt and the latch for opening a door smoothly, quickly and safely.

REFERENCES:
patent: 2039124 (1936-04-01), Stryker
patent: 3390558 (1968-07-01), Tornoe et al.
patent: 4129019 (1978-12-01), Urdal
patent: 4809526 (1989-03-01), Shen
patent: 4864835 (1989-09-01), Wartian
patent: 4995248 (1991-02-01), Liu

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