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. 15, 1981
Filed:
Mar. 02, 1978
Applicant:
Inventor:
Heinrich Gretler, Hinwil, CH;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05B / ;
U.S. Cl.
CPC ...
70358 ; 7036 / ; 70406 ;
Abstract
Recesses in a key are formed by a cutter having a shape corresponding to the shape of the tumbler pin to be associated with the recess. The recesses to receive perpendicularly extending pins are formed with parallel opposed side walls perpendicular to the key surface to decrease the total space required for recesses of greatest step value. Recess for 45.degree. inclined permutations are formed with one flat wall. Methods and apparatus are disclosed.