Anti-barricading thumb turn assembly for a door lockset

An anti-barricading thumb turn assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading thumb turn assembly includes a spindle connected to a thumb turn with a biasing member on one side of the lockset. The lockset is also operable by a k...

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Bibliographic Details
Main Authors Holmes, Douglas A, Litwinski, Adam M
Format Patent
LanguageEnglish
Published 07.04.2020
Subjects
ACCESSORIES THEREFOR
FIXED CONSTRUCTIONS
HANDCUFFS
KEYS
LOCKS
SAFES
WINDOW OR DOOR FITTINGS
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Summary:An anti-barricading thumb turn assembly is configured for use with a lockset including a bolt movable to lock and unlock a door. The anti-barricading thumb turn assembly includes a spindle connected to a thumb turn with a biasing member on one side of the lockset. The lockset is also operable by a key from the other side of the door to lock and unlock the door. Under normal operation, the spindle and thumb turn rotate as the bolt is locked and unlocked. In a barricading situation in which the thumb turn is held in an attempt to prevent the spindle from rotating, the biasing member allows the spindle to rotate relative to the thumb turn upon application of sufficient force through rotation of the key to overcome the biasing force and unlock the bolt even if the thumb turn is held stationary.
Bibliography:Application Number: US201815919477