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.

Date of Patent:
Sep. 10, 2024

Filed:

Mar. 23, 2023
Applicant:

Kobe Steel, Ltd., Hyogo, JP;

Inventors:

Yasuhiro Maeda, Kobe, JP;

Toru Hashimura, Kobe, JP;

Taiki Yamakawa, Shimonoseki, JP;

Assignee:

KOBE STEEL, LTD., Hyogo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C 26/00 (2006.01); B21C 23/08 (2006.01);
U.S. Cl.
CPC ...
B21C 23/085 (2013.01); B21C 26/00 (2013.01);
Abstract

An extruded material includes a peripheral wall having a closed loop-shaped cross-section and defining a hollow, and a middle rib connected to an inner peripheral surface of the peripheral wall and dividing the hollow. The extruded material is provided with a corrected portion set at a predetermined portion in a longitudinal direction and subjected to correction processing, and an uncorrected portion not subjected to the correction processing. The peripheral wall is expanded outward with respect to an original shape of the uncorrected portion in the corrected portion. While the middle rib is curved with respect to an imaginary straight line connecting connecting portions connected with the peripheral wall at both end portions of the middle rib in the uncorrected portion, the middle rib has a smaller degree of curvature than the original shape of the uncorrected portion in the corrected portion.


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