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. 24, 1989
Filed:
May. 11, 1987
Applicant:
Inventors:
Jon M Smallegan, San Mateo, CA (US);
Richard R Bettger, San Francisco, CA (US);
Assignee:
Schlage Lock Company, San Francisco, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05B / ;
U.S. Cl.
CPC ...
70395 ; 70400 ; 70401 ; 70454 ;
Abstract
The invention comprises a two part key which replaces a conventional key in a conventional lock cylinder for purpose of temporary use wherein one of the parts is a plastic or similar material insert which replaces a portion of the conventional key and a short conplementary key which permits operation of the lock in conjunction with the insert. The insert being secured in the cylinder by means of the cylinder locking pins and being removable only by means of a special installation and extraction tool.