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:
May. 31, 2005
Filed:
Feb. 07, 2000
Applicants:
Norihisa Okada, Yamaguchi, JP;
Kiyoshi Yoshizaki, Yamaguchi, JP;
Inventors:
Norihisa Okada, Yamaguchi, JP;
Kiyoshi Yoshizaki, Yamaguchi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B003/02 ; B32B031/00 ; B21D047/00 ;
U.S. Cl.
CPC ...
Abstract
A laminated material relatively large in thickness and having a curved surface of small radius, wherein a laminated material () as a raw material is provided in which surface plates () are fixed to both surfaces of a core material () and the surface plate () on the internal side of an arc is not fixed to the core material () and, with one end side of the laminated material () fixed to frames (), the other end of the surface plate () is moved in the direction apart from the core material () so as to bend it in arc-shape, the other end being not fixed to the core material ().