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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.:

US 11718347 B1

PDFFull Text
Date of Patent:
Aug. 08, 2023

Filed:

Nov. 12, 2019

Frame member

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Hiroaki Kubota, Tokyo, JP;

Yuri Toda, Tokyo, JP;

Hiroyuki Kawata, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Joseph D Pape

Assistant Examiner:

Dana D Ivey

Int. Cl.
CPC ...
B62D 21/15 (2006.01); B62D 25/02 (2006.01); B62D 25/04 (2006.01); B62D 25/20 (2006.01); B62D 29/00 (2006.01); B62D 25/00 (2006.01); B21D 47/01 (2006.01); B62D 25/06 (2006.01); B62D 25/08 (2006.01); B21D 53/88 (2006.01);
U.S. Cl.
CPC ...
B62D 21/152 (2013.01); B62D 25/025 (2013.01); B62D 25/04 (2013.01); B62D 25/20 (2013.01); B21D 47/01 (2013.01); B21D 53/88 (2013.01); B60Y 2306/01 (2013.01); B62D 25/00 (2013.01); B62D 25/06 (2013.01); B62D 25/08 (2013.01); B62D 29/007 (2013.01);
Abstract

The frame member has a flat sheet portion with a recessed portion having a pair of wall portions and a bottom portion extending between tip portions in an extending direction of the pair of wall portions, in which a Vickers hardness of a region of the flat sheet portion excluding the recessed portion is 330 Hv or more, a depth of the recessed portion is 5 mm or more, when a width of the recessed portion is Land a cross-sectional length of an inner peripheral wall of the recessed portion consisting of the pair of wall portions and the bottom portion is L, a value of (L−L)/Lis 0.18 or more and 2.8 or less, and a Vickers hardness of a ridgeline portion extending between the flat sheet portion and the recessed portion is 1.06 times or more and 1.20 times or less the Vickers hardness of the region of the flat sheet portion excluding the recessed portion.

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