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:
Sep. 07, 1999
Filed:
Nov. 24, 1997
Helmut R Aigner, Colorado Springs, CO (US);
Cliff W Allen, Jr, Colorado Springs, CO (US);
Frederick M Hensley, Colorado Springs, CO (US);
Troy A Dalsing, Colorado Springs, CO (US);
Melinda T Neligon, Colorado Springs, CO (US);
Schlage Lock Company, San Francisco, CA (US);
Abstract
A knob catch for securing a knob or lever to the driving spindle of a door lock. The knob catch is constructed of a base with a centered odd shaped hole. The hole is made in such a way that the knob or lever cannot be removed when the locking device is in the locked position using a key operated cylinder with a flat locking bar. A tongue portion of the knob catch rises above the base and fits into the knob or lever and keeps the knob or lever from being removed. In the front side of this tongue is an angular surface which permits the knob or lever to be slid over the top of the knob catch until the knob catch tongue and an aperture in the knob or lever align allowing the tongue to be spring biased into the aperture to secure the knob or lever. There are two springs attached to the knob catch to bias the tongue into engagement with the knob or lever aperture.