Lock with emergency unlocking feature
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United States of America Patent
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Sep 21, 2021
Grant Date -
May 21, 2020
app pub date -
Mar 5, 2019
filing date -
Nov 16, 2018
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A lock with an emergency unlocking feature includes a latch bolt, a top rotation member, a restriction plate and a driving member. The driving member is connected to the deadbolt. When the top rotation member is rotated from a close position to an open position while the lock is locked, a restriction member drives the restriction plate to press a resilient unit. The restriction plate is moved to disengage the engaging member on the restriction plate from the second notch of the driving member. The guide slot of the transmission plate pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the open position. When in an emergency situation, the user rotates the handle to retract both of the deadbolt and the latch bolt without using a key to unlock the deadbolt to save time.
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