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:
Dec. 20, 2016
Filed:
May. 26, 2010
Atsushi Sugiura, Tokyo, JP;
Takumi Hori, Tokyo, JP;
Kenji Nishikawa, Tokyo, JP;
Ken Onishi, Tokyo, JP;
Noriaki Shimonabe, Tokyo, JP;
Satoshi Tsuzuki, Hiroshima, JP;
Ikuo Wakamoto, Hiroshima, JP;
Atsushi Sugiura, Tokyo, JP;
Takumi Hori, Tokyo, JP;
Kenji Nishikawa, Tokyo, JP;
Ken Onishi, Tokyo, JP;
Noriaki Shimonabe, Tokyo, JP;
Satoshi Tsuzuki, Hiroshima, JP;
Ikuo Wakamoto, Hiroshima, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
A reactor vessel that performs work inside a nozzle stub of the reactor vessel, including a platform unit that is provided at an upper portion inside the reactor vessel and includes a substantially cylindrical side wall portion and a bottom portion blocking the lower end of the side wall portion; an access window that is provided at the side wall portion of the platform unit an access window moving device that opens and closes the access window; a working device; and a control device that is provided at the outside of the reactor vessel and controls the access window moving device and the working device, wherein the control device drives the access window moving device to open the access window, drives the working device to perform work inside the nozzle stub, and then drives the access window moving device to close the access window after the performance of the work.