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:
Mar. 12, 1996
Filed:
Jul. 29, 1994
Osamu Isshiki, Hitachi, JP;
Masaki Murashita, Hitachi, JP;
Osamu Matsushima, Hitachioota, JP;
Sadao Nakagawa, Hitachi, JP;
Seizo Nakano, Mito, JP;
Koji Goto, Hitachi, JP;
Masayoshi Hashiura, Hitachi, JP;
Yutaka Kobayashi, Hitachi, JP;
Takashi Satoh, Hitachi, JP;
Katsuro Ota, Hitachi, JP;
Hideaki Kikuchi, Hitachi, JP;
Takashi Sato, Kitaibaraki, JP;
Shinji Fukuda, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A welded metal container for a sheath 1 or 1A of gas insulated switch gear comprises a trunk pipe 2, 21 and a branch pipes 3, 31, 32 welded to the trunk pipe 2,21 by arc welding A or laser beam welding LB and flanges welded to the each end portion of the trunk pipe 2, 21 and branch pipes 3, 31, 32 by the laser beam welding. After the arc welding A, the ends of trunk pipe 1, 21 and branch pipes 3, 31, 32 are machined precisely and flanges 4a, 4b, 4c, 4d, 4f and 4g are welded to the end portions of the trunk pipe 2, 21 and branch pipes 3, 31, 32.