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. 10, 2011
Filed:
Nov. 15, 2006
Tomohiro Naruse, Hitachinaka, JP;
Hideki Akiniwa, Tsuchiura, JP;
Hiroaki Yoda, Tsuchiura, JP;
Minoru Hiroshima, Ushiku, JP;
Tomohiro Naruse, Hitachinaka, JP;
Hideki Akiniwa, Tsuchiura, JP;
Hiroaki Yoda, Tsuchiura, JP;
Minoru Hiroshima, Ushiku, JP;
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Abstract
According to the present invention, along the right and left sides of a rotary shaft, flat faces that serve as sealing faces are formed at the circumferential edges, on the suction chamber side, of semicircular division plates, which define suction chambers and a discharge chamber of a volute casing that is divided into two segments. Two disc plates are prepared as pressure test tools, and are positioned on the right and left sides of the rotary shaft so that they contact the flat faces that are formed around the circumferential edges of the division plates near the suction chambers. The two disc plates are then securely connected to a member in the axial direction. In addition, a bolt fastening structure, which is axially tightened by the member that connects the disc plates axially, is provided in at least one axial direction.