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. 30, 2005
Filed:
Apr. 10, 2001
Kinya Aota, Hitachi, JP;
Masakuni Ezumi, Kudamatsu, JP;
Yasuo Ishimaru, Kudamatsu, JP;
Hisanori Okamura, Tokai-mura, JP;
Isao Funyuu, Takahagi, JP;
Akihiro Satou, Kudamatsu, JP;
Kinya Aota, Hitachi, JP;
Masakuni Ezumi, Kudamatsu, JP;
Yasuo Ishimaru, Kudamatsu, JP;
Hisanori Okamura, Tokai-mura, JP;
Isao Funyuu, Takahagi, JP;
Akihiro Satou, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The friction stir welding technique disclosed avoids occurrence of a dent in adjoining region extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, thickened parts, which project toward the rotary body joining tool, are provided. The Two adjoining thickened parts form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion, and is inserted in the thickened parts. When the rotary body joining tool has been inserted small-diameter tip end first to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out. After the joining, the remaining parts of the thickened parts can be machined to form a smooth surface.