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. 24, 2004
Filed:
May. 07, 2002
Masakuni Ezumi, Kudamatsu, JP;
Kazusige Fukuyori, Kudamatsu, JP;
Yoshihiko Ina, Kudamatsu, JP;
Tetsuya Matsunaga, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Abutted portions of face plates and of frame members and are friction stir welded. With the abutting, a projecting portion of an end portion of the face plate of the frame member is inserted into a recessed portion of an end portion of the face plate of the frame member . By this engagement, the outer face on one face side of the face plates and form a smooth surface, so that there is no step at the joined edges. Next, a rotary tool is inserted into the gap between the abutted plates, from the side of the raised portions and of the face plates and , while the other faces and of the face plates and are supported flatly on a bed during the friction stir welding. Accordingly, the welding of the engaged plates can be carried out without any step-wise difference.