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. 15, 2007
Filed:
Mar. 28, 2005
Yusuke Yoshida, Kyoto, JP;
Toru Tamagawa, Machida, JP;
Tomotsugu Sugiyama, Kyoto, JP;
Kazumi Takeshita, Kyoto, JP;
Masayuki Aoki, Kyoto, JP;
Yusuke Yoshida, Kyoto, JP;
Toru Tamagawa, Machida, JP;
Tomotsugu Sugiyama, Kyoto, JP;
Kazumi Takeshita, Kyoto, JP;
Masayuki Aoki, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
A centrifugal fan comprises an impeller, a motor which is connected and rotates the impeller and a housing which has an intake and an air blowing port for housing the impeller. The impeller has a plurality of blades arranged on a circumference. The intake opens opposed to the right end (in FIG.) of the impeller. The air blowing port opens opposed to a side of the impeller. A gap enlarged portion, in which the distance between the outer circumference of the impeller and the inner face of the housing starts to increase at a point where the distance between the outer circumferential of the impeller and the surface of a nose portion is smallest therein, the nose portion being a region of the vicinity of an edge portion of the air blowing port, the edge portion being the closest side to the outer circumference of the impeller.