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:
Oct. 18, 2011
Filed:
Jun. 03, 2008
Applicants:
Shizu Ishikawa, Chiba, JP;
Hiroshi Asabuki, Sakura, JP;
Satoshi Takeda, Funabashi, JP;
Inventors:
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F01D 1/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
In the present invention, a partition wall which partitions a discharge port and a suction port provided on a static passage, in the rotating direction, has a discharge side shape which is identical with the shape of blades, and has a positional relationship in which the partition wall does not overlap with the discharge port in view of such a fact that the pressure variation on the suction side is higher than that of the discharge side, and noise on the suction side is dominant.