The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2007
Filed:
Jan. 24, 2007
Brett E Tannone, Newtown, CT (US);
Brett E Tannone, Newtown, CT (US);
Sargent Manufacturing Company, New Haven, CT (US);
Abstract
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 which likewise moves up and down when the thumb-piece is moved. A permissive spring 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 provides greater resistance to abusive attacks of the door lock and mechanism.