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, 2020
Filed:
Mar. 20, 2018
Nippon Steel Corporation, Tokyo, JP;
Masahiro Kubo, Tokyo, JP;
Yoshiaki Nakazawa, Tokyo, JP;
Naruhiko Nomura, Tokyo, JP;
Toshiya Suzuki, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A hat memberincludes a top-plate portion, first ridges, and two side walls. The two side walls have a middle hardness Dc of 300 HV or higher. Each of the two side wallsincludes a softened portion L and a strength-transition portion T adjacent to the softened portion L. The softened portion L has a hardness Dn lower than the middle hardness Dc by at least 8% (Dc−Dn≥0.08Dc). The strength-transition portion T extends 0.5 mm or longer from the softened portion L toward the first end of the side wall. The strength-transition portion T has a hardness Dt that transitionally changes within the range of 8% to 1% lower than the middle hardness Dc (0.92Dc≤Dt≤0.99Dc). The hat memberfurther includes two second ridgesand two flanges