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:
Aug. 26, 2014
Filed:
Jul. 15, 2011
Hiroshi Hirano, Tokyo, JP;
Hiroshi Hirano, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
[Problem to be Solved] To easily perform assembly at the time of plugging an inspection hole. [Solution] An inspection hole plugthat plugs an inspection hole of an outer casingsurrounding a tube bundle in a steam generator includes: a basefixed to the outer casingand having an openingthat serves as the inspection hole; a fitting memberthat plugs the openingof the base; a fitting unitthat guides rotational movement of the fitting memberin a circumferential direction along an inner peripheral edge of the openingof the baseand restricts the rotational movement by an axial movement of the fitting memberparallel to a central axis R of the rotational movement to fit the inner peripheral edge of the openingof the baseand an outer peripheral edge of the fitting memberto each other; a holding memberinto which a shaft portionextending from the fitting memberalong the axial direction is inserted and that is provided to be capable of abutting on the base; and a fastening memberthat is screwed onto the shaft portionof the fitting memberand holds the fitting memberat a position axially moved by fastening thereof with the holding memberabutting on the base