Door lock set with simultaneously retractable deadbolt and latch

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United States of America Patent

PATENT NO 5077992
SERIAL NO

07714372

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Importance

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
CHANG TONY6F-1 NO 103 CHUNG SHAN N ROAD SEC 2 TAIPEI

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Su, Frank c/o Hung Hsing Patent Service Center, P.O. Box 55-1670, Taipei (10477 25 222

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