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:
May. 26, 1987
Filed:
Feb. 06, 1986
William R Foshee, Noblesville, IN (US);
Best Lock Corporation, Indianapolis, IN (US);
Abstract
A spindle assembly is provided for retracting a latch bolt of a lock set having separate independently rotatable inside and outside latch bolt-retracting hubs. The spindle assembly includes an inside spindle for operating the inside hub, an outside spindle for operating the outside hub, and a connection member for rotatably interconnecting the inside and outside spindles. The outside spindle includes an inner spindle portion for engaging the outside hub, an outer spindle portion for supporting a lever handle or the like, and a frangible portion interconnecting the inner and outer portions. The frangible portion is configured to transmit spindle-twisting torque from the outer spindle portion to the inner spindle portion in response to application of a torque in excess of a first predetermined amount. The frangible portion is also configured to break at a shear plane in response to application of a torque in excess of a second greater predetermined amount to the outer spindle portion of the outside spindle while the inner spindle portion is fixed against rotation.