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:
Aug. 29, 1978
Filed:
Jun. 27, 1977
Applicant:
Inventor:
Marvin E Roberts, Reno, NV (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05B / ; E05B / ; E05B / ;
U.S. Cl.
CPC ...
70365 ; 70377 ; 70406 ;
Abstract
A key construction for use with a rotary disc-tumbler lock wherein longitudinal restricting wards in a plurality of cross-sectional profiles are formable along the key shank and a warding tumbler with a similarly shaped key entry opening, which warding tumbler is used in a lock associated with the warded key thereby providing a plurality of correspondingly shaped warding key entry openings in the lock and key profile configurations which permits locks and keys to be grouped into different series with a key from one group of locks being restricted from entering the locks of another group even though the bitting codes are the same.