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:
Feb. 17, 2004
Filed:
Nov. 04, 2002
Masakuni Ezumi, Kudamatsu, JP;
Akihiro Satou, Hitachi, JP;
Kazusige Fukuyori, Kudamatsu, JP;
Takeshi Kawasaki, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
End portions of face plates and of a frame member are connected by a rib A. To protrusion chips and end portions of face plates and of another frame member are overlapped. The corners between the rib A and the rear faces of the face plates and are in the form of a convex circular arc which protrudes into a hollow portion of the frame member . Both end portions of the circular arc are connected to the rib A and the face plates and by two smooth recessed circular arcs and . Accordingly, since a flow-out of metal does not occur from this portion, the cross-section can be small and a light weight structure an be obtained. A structural body formed of hollow frame members which are joined by friction stir welding provides a light weight structure.