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:
Apr. 30, 2002
Filed:
May. 17, 2000
Takeshi Kawasaki, Kudamatsu, JP;
Masakuni Ezumi, Kudamatsu, JP;
Masaki Yono, Kudamatsu, JP;
Toshiaki Sagawa, Yanai, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A hollow frame member is constituted by two face plates ( ) joined in a truss shape by ribs A, B ( A, B). End portions of one of the face plates and are positioned in the vicinity of an apex of the truss structure of the hollow frame member. End portions of the other of the face plates and have a projection extending toward the end portions of the face plates and . The face plates and are joined by friction stir welding from an upper portion. Next, a connection member is arranged between the ends of the face plates and , and from an upper portion the friction stir welding is again carried out. Due to the presence of the ribs A, B ( A, B), the load during the friction stir welding time is easily supported. Since the truss structure is formed totally, a light weight structure with a high rigidity performance can be obtained.