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:
Jul. 18, 2006
Filed:
Jan. 28, 2004
Applicants:
Charles W. Finkl, Chicago, IL (US);
Algirdas A. Underys, Arlington Hts, IL (US);
Inventors:
Charles W. Finkl, Chicago, IL (US);
Algirdas A. Underys, Arlington Hts, IL (US);
Assignee:
A. Finkl & Sons Co., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Differential hardening apparatus for softening a portion only of a metal workpiece such as a die block consisting of apparatus for presenting a workpiece to a heat source which impinges heat directly on the workpiece and control means for causing the heat to be directed only long enough to soften only the portion which receives the heat so as to create a softened portion, such as the shank portion of a die block, and an unaffected hardened portion, such as the body portion of the die block.