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:
Oct. 14, 2025
Filed:
Jul. 09, 2021
Nippon Steel Corporation, Tokyo, JP;
Kenichiro Otsuka, Tokyo, JP;
Masafumi Azuma, Tokyo, JP;
Yasuhiro Ito, Tokyo, JP;
Toru Yonebayashi, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A burring processing method including increasing a diameter of a prepared hole provided in a metal component and bending a part of the metal component to form a burring processed portion () including an upright portion () and a curved portion (), wherein in a cross-section that passes through an axis (cb) of the burring processed portion () and is parallel to the axis (cb) of the buffing processed portion (), a cross-sectional shape of the curved portion () on an inner surface of the curved portion consists of a curve, and a length of the curved portion () in a direction perpendicular to the axis (cb) of the burring processed portion () is at least 1.2 times a height of the curved portion in a direction parallel to the axis (cb) of the burring processed portion ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile