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:
Sep. 23, 2025
Filed:
Nov. 01, 2021
Nippon Light Metal Company, Ltd., Tokyo, JP;
Nobushiro Seo, Shizuoka, JP;
Ryo Yoshida, Shizuoka, JP;
Shingo Koizumi, Shizuoka, JP;
Keita Oikawa, Shizuoka, JP;
NIPPON LIGHT METAL COMPANY, LTD., Tokyo, JP;
Abstract
A rotary tool includes: a main body having a fixed unit and a rotary shaft; a stirring pin rotatable and movable relative to an axial direction of the rotary shaft, and inserted into a joint member to perform friction stirring; and a shoulder that is arranged on the main body so as not to receive a rotary force from the main body but to be movable relative to the axial direction of the rotary shaft, and that presses the joint member while in contact with the joint member, wherein the stirring pin and the shoulder are mounted to form an assembly so as to be relatively movable and to move integrally in the axial direction of the rotary shaft, and the rotary tool further includes a first elastic member that biases the assembly toward a distal-end side of the stirring pin relative to the axial direction of the rotary shaft.