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:
Jan. 24, 2006
Filed:
Sep. 04, 2003
Kenichi Matsunaga, Kobe, JP;
Ganji Abe, Kobe, JP;
Kazuo Murakami, Kobe, JP;
Koichi Ue, Kobe, JP;
Takashi Shige, Takasago, JP;
Etsuryo Kita, Kobe, JP;
Shizuo Inoue, Kobe, JP;
Tsuneo Mandai, Kobe, JP;
Kenichi Matsunaga, Kobe, JP;
Ganji Abe, Kobe, JP;
Kazuo Murakami, Kobe, JP;
Koichi Ue, Kobe, JP;
Takashi Shige, Takasago, JP;
Etsuryo Kita, Kobe, JP;
Shizuo Inoue, Kobe, JP;
Tsuneo Mandai, Kobe, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A primary lid is set in a top opening of a vessel body that contains radioactive substance, and closes the top opening. The peripheral edge portion of the primary lid is welded to the inner peripheral surface of the vessel body. As the primary lid is welded, steam in the vessel body is discharged to the outside through a discharge hole in the primary lid, and a shield gas is filled into or run through a space in the outer peripheral portion of the primary lid, so as to prevent the steam from flowing into the welding portion.