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:
Jan. 28, 2014
Filed:
Jul. 20, 2011
Atsushi Tomizawa, Minoo, JP;
Naoaki Shimada, Osaka, JP;
Michitaka Yoshida, Amagasaki, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
A lightweight hollow member having excellent stiffness and impact properties and which is suitable for automotive parts due to having a high strength such as at least 780 MPa and a complicated shape is provided. A hollow memberhas a hollow steel body. The bodyis constituted by a single member at least in the lengthwise direction. The bodyhas a flat cross section having at least a portion with a maximum outer dimension Land a portion with an outer dimension Lshorter than the maximum outer dimension L. The bodyhas a twisted portion in a portion of its length. The angle of intersection between an imaginary planeincluding the portion having the maximum outer dimension Lin a first portionpresent on one side of the bodyin the lengthwise direction with the twisted portionas a border and an imaginary planeincluding the portion with the maximum outer dimension Lin a second portionpresent on the other side in the lengthwise direction of the bodywith the twisted portionas a border is at least 4 degrees. The twisted portionhas a tensile strength of at least 780 MPa.