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:
Jun. 03, 2014
Filed:
Oct. 29, 2008
Applicants:
Shinji Takemoto, Kyoto, JP;
Yuichiro Yokoyama, Kyoto, JP;
Shinya Kaneoya, Kyoto, JP;
Inventors:
Assignee:
Nidec Corporation, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fan includes sloping surfaces arranged at an inner peripheral surface of an air channel portion that are shaped such that an air passage is enlarged in a cross sectional area in a direction normal or substantially normal to a central axis. The inner peripheral surface of the air channel portion also includes a straight surface at which area the distance between the central axis and the inner peripheral surface of the air channel portion is substantially constant. Also, the straight surface of the air channel portion includes a plurality of slits each penetrating the air channel portion.