LINEAR THUMB-PIECE ACTUATION LATCH MECHANISM

This invention provides a thumb-piece door latch mechanism which has ergonomic features, is modular and can be used with any escutcheon, can be used with all type locks, and which in the locked door mode provides greater resistance to abusive attack of the door latch mechanism and makes the thumb-pi...

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Bibliographic Details
Main Author TANNONE, BRETT E
Format Patent
LanguageEnglish
French
Published 24.07.2008
Subjects
BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS
FIXED CONSTRUCTIONS
KEYS
LOCKS
SAFES
WINDOW OR DOOR FITTINGS
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Summary:This invention provides a thumb-piece door latch mechanism which has ergonomic features, is modular and can be used with any escutcheon, can be used with all type locks, and which in the locked door mode provides greater resistance to abusive attack of the door latch mechanism and makes the thumb-piece and latch mechanism more durable and less susceptible to vandalism. The thumb- piece moves linearly up and down and is connected to a thumb-piece guide plate whi ch likewise moves up and down when the thumb-piece is moved. A permissive sprin g having one end connected to a spindle turn plate and the other end connected to the guide plate moves a rotatably mounted spindle, which in turn rotates a spindle tail and a latch connected to the spindle tail. The permissive spring provid es greater resistance to abusive attacks of the door lock and mechanism.
Bibliography:Application Number: CA20072615585