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. 08, 2015
Filed:
Jun. 09, 2010
Applicant:
Jan Krispinsson, Lulea, SE;
Inventor:
Jan Krispinsson, Lulea, SE;
Assignee:
Gestamp Hardtech AB, Lulea, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 8/02 (2006.01); C21D 1/673 (2006.01); B21D 22/02 (2006.01); B21D 37/16 (2006.01); C21D 9/50 (2006.01);
U.S. Cl.
CPC ...
C21D 1/673 (2013.01); B21D 22/02 (2013.01); B21D 37/16 (2013.01); C21D 8/02 (2013.01); C21D 9/505 (2013.01);
Abstract
A method of forming a product by shaping and hardening a sheet-steel blank formed from separate sheets welded together, heating the blank to the austenitising range, hot stamping the blank in a cooled tool pair, hardening the product while it remains in the tool pair, and cooling the weld between two adjacent sheets at a reduced cooling rate as compared to the cooling rate of areas on either side of the weld.