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:
Sep. 04, 2007
Filed:
Mar. 31, 2005
Applicants:
Yusuke Yoshida, Kyoto, JP;
Toru Tamagawa, Machida, JP;
Tomotsugu Sugiyama, Kyoto, JP;
Kazumi Takeshita, Kyoto, JP;
Inventors:
Yusuke Yoshida, Kyoto, JP;
Toru Tamagawa, Machida, JP;
Tomotsugu Sugiyama, Kyoto, JP;
Kazumi Takeshita, Kyoto, JP;
Assignee:
Nidec Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A tiny-diameter, lengthwise extensive impeller utilized in an ultra-small centrifugal fan is molded by an injection molding operation. In order to avert difficulties attendant on injection-molding ultra-miniature parts, the thickness and length of a reinforcing ring on the tip of the impeller are set to within predetermined ranges. Further, the thickness of each of the vanes that constitute the impeller is made maximum where they join to the impeller ring section.