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:
Aug. 21, 2007
Filed:
Apr. 21, 2006
Masato Yamamoto, Kyoto, JP;
Masato Yamamoto, Kyoto, JP;
Nidec Corporation, Kyoto, JP;
Abstract
In an axial fan, a case () accommodating the fan motor stator () is anchored into a bearing retainer (), in which ball bearings () as a bearing unit are accommodated, along a bulge part () formed on the lower end portion thereof. The case () extends heading axially downward, wherein there is no diametrical overlap between the ball bearings () and the stator (). Since only the bulge part () of the bearing retainer () is fixed to the case (), heat arising from the stator () is thermally conveyed via the case () only to the bulge part (). The fact that the thermal conveyance zone is minimal enables unrestrained curtailment of heat transmitted to the ball bearings (). As a result the axial fan can be designed for prolonged bearing lifespan.