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:
Jun. 24, 2003
Filed:
Feb. 26, 2001
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21C 2/700 ; B21D 2/800 ; B21F 2/700 ; B22F 5/00 ; B32B 3/00 ;
U.S. Cl.
CPC ...
B21C 2/700 ; B21D 2/800 ; B21F 2/700 ; B22F 5/00 ; B32B 3/00 ;
Abstract
The present invention aims to provide a joint figuration inhibiting decrease in strength resulting from welding at the joint region, in a case where hollow-shaped material is friction stir welded. A face plate ( ) between a rib ( ) at the end portion of a hollow-shaped material ( ) and a rib ( ) has a thickness t (t ) at the rib ( ) side and ti at the rib ( ) side. The thickness t (t ) is thicker than ti. The thickness between the two is changed smoothly. The thickness of the plate thickness t (t ) is provided by projecting towards the other face plate side.