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. 10, 2012
Filed:
Jan. 04, 2007
Applicants:
Takanori Ishii, Hitachi, JP;
Akira Manabe, Kasumigaura, JP;
Yasuhiro Inoue, Kasumigaura, JP;
Inventors:
Assignee:
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 29/38 (2006.01); F01D 5/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
Radial cross sections of front sides in rotational direction of impellers attached to a pump shaft obliquely to a circumferential direction from an upstream side toward a downstream side have concave shapes protruding toward the upstream side, and radial cross sections of rear sides in rotational direction of the impellers have concave shapes protruding toward the downstream side.