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:
Feb. 11, 1992
Filed:
Jul. 09, 1990
Applicant:
Inventor:
Anthony J Agbay, Auburn, MA (US);
Assignee:
Olson Manufacturing Co., Holden, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E05B / ;
U.S. Cl.
CPC ...
70366 ; 70377 ; 70392 ;
Abstract
The lifting and rotating zeroes and the combination discs of a disc cylinder lock are provided with curved internal camming surfaces designed to mate with external curved camming surfaces on the key shank. The curved camming surfaces consist of segments of mathematically defined spirals, with non-uniform radii as measured from the lock axis.