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:
Aug. 13, 2013
Filed:
Mar. 31, 2010
Yuji Hashimoto, Aichi, JP;
Shunsuke Toyoda, Aichi, JP;
Kinya Nakagawa, Hiroshima, JP;
Koji Suzuki, Kanagawa, JP;
Yoshikazu Kawabata, Aichi, JP;
Osamu Sonobe, Chiba, JP;
Akio Sato, Kanagawa, JP;
Yuji Hashimoto, Aichi, JP;
Shunsuke Toyoda, Aichi, JP;
Kinya Nakagawa, Hiroshima, JP;
Koji Suzuki, Kanagawa, JP;
Yoshikazu Kawabata, Aichi, JP;
Osamu Sonobe, Chiba, JP;
Akio Sato, Kanagawa, JP;
JFE Steel Corporation, , JP;
Abstract
A method enhances fatigue strength of ear portions which are high fatigue risk parts in a torsion beam almost without bringing about disadvantages in terms of productivity and cost. A torsion beam is formed with a portion of the tubular body into an approximately U-shape in cross section by crushing the portion of the tubular body in the radial direction and, thereafter, due to bending with a bottom line set as a belly side of bending, a bending strain of 2 to 6% in the tube longitudinal direction on a tensile side is imparted to the ear portions.