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:
Mar. 25, 2003
Filed:
Aug. 11, 2000
Michael Winardi, Fullerton, CA (US);
NewFrey LLC, Newark, DE (US);
Abstract
An adjustable-backset latch system for a lockset includes three main subsystems: a bolt retraction system, a backset-adjustment system and a deadlatching system. By virtue of the simplicity of the design of the backset-adjustment subsystem, the user can change the backset from 2⅜″ to 2¾″, and vice-versa with one hand. A pin is simply moved through a “U”-shaped slot formed in a housing and housing and bolt actuation components are extended simultaneously by the desired backset increment. The bolt retraction system of the present invention uses a cam in which the distance from a point about which the cam rotates and the end of the cam, and the distance to a smaller cam pin, are selected to multiply the relatively small angular distance transversed during a half-round rotation of the knob or handle into the desired retraction distance of a main bolt. The deadlatching system uses two springs, one of which not only biases an auxiliary bolt to its extended position, but also biases a deadlocking dog so as to pivot into a blocking position preventing the main bolt from being retracted completely, in the event an intruder attempts to move the bolt.