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:
Jan. 27, 1987
Filed:
Oct. 11, 1985
Jon M Smallegan, San Mateo, CA (US);
Schlage Lock Company, San Francisco, CA (US);
Abstract
The arrangement comprises a standard, door knob-operated, latch mechanism in which the cylindrical shank of the door knob is slidably engaged with the rotatable spindle of the mechanism, and the spindle has a spring-biased catch projecting therethrough which passes into a slot formed in the cylindrical shank of the knob. In this way, the knob is secured on the shank. The improvement comprises forming a ramp in a cut-out on the terminal or outermost end of of the cylindrical shank, and forming a complimentary bevel on a corner of the projecting catch. Accordingly, when the knob is slidably forced onto its spindle, during manufacturing assembly, the ramp formed in the cut-out engages the bevel and, consequently, depresses the catch to allow the cylindrical shank to slide thereupon and thereover, and to allow the catch latchingly to engage the slot.