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:
Feb. 08, 2011
Filed:
Jan. 31, 2006
Tetsuya Yoshida, Tsuchiura, JP;
Yoshimasa Chiba, Tsukuba, JP;
Tetsuya Yoshida, Tsuchiura, JP;
Yoshimasa Chiba, Tsukuba, JP;
Hitachi Industries Co., Ltd., Tokyo, JP;
Abstract
In an industrial pump, a bearing provided in a pump main body rotatably supports both end sides of a rotating shaft to which an impeller is attached. A shaft seal apparatus is arranged in adjacent to the bearing. The shaft seal apparatus is cooled by a cooling water introduced from an external portion. A shaft seal case is fitted to an inner peripheral surface of a bracket accommodating the shaft seal apparatus in accordance with a shrink fitting. A cooling water is circulated in a boundary portion between the bracket and the shaft seal case. It is omitted a work for closing an opening portion of a cooling means for circulating the cooling water by welding.