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:
Apr. 08, 2014
Filed:
Jun. 11, 2007
Applicant:
Kaarlo Martikainen, Joensuu, FI;
Inventor:
Kaarlo Martikainen, Joensuu, FI;
Assignee:
Abloy Oy, Joensuu, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05B 29/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a disc tumbler cylinder lock and a key for it. The key according to the invention comprises a groove that is transverse to the key shank. The groove comprises a bottom section and side sections that are transverse to the bottom section between the bottom section and the outer surface of the key shank. The bottom section of the groove is the key's main driving surface used to transfer turning force to the disc tumbler cylinder lock. This reduces wear on the O-surfaces of the key because the O-surfaces do not transfer the majority or any of the key turning force to the disc tumbler cylinder lock.