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:
Apr. 12, 2011
Filed:
Dec. 27, 2007
Hong Sun, Shenzhen, CN;
Bao-hua Liang, Shenzhen, CN;
Yong-kang Zhang, Shenzhen, CN;
Ying-min Huang, Taipei Hsien, TW;
Hong Sun, Shenzhen, CN;
Bao-Hua Liang, Shenzhen, CN;
Yong-Kang Zhang, Shenzhen, CN;
Ying-Min Huang, Taipei Hsien, TW;
Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Foxconn Technology Co., Ltd., Tu-Cheng, New Taipei, TW;
Abstract
A cooling fan includes a fan housing () having a central tube () extending upwardly therefrom, a bearing () received in the central tube, a stator () mounted around the central tube, a rotor () having a shaft () extending into the bearing, and a magnetic ring () being fixedly mounted to the rotor to rotate with the rotor during operation of the cooling fan. The bearing is made of iron-copper alloy. The magnetic ring is made of hard magnetic material and exerts a magnetic attraction on the bearing, whereby the rotor is pulled downwardly by a magnetic attraction of the bearing on the magnetic ring to lessen the floating problem of the rotor during operation of the cooling fan.