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:
Jul. 16, 2007
LI Bei, Shenzhen, CN;
Zhi-cheng Yang, Shenzhen, CN;
Yong-kang Zhang, Shenzhen, CN;
Ying-min Huang, Taipei Hsien, TW;
Li Bei, Shenzhen, CN;
Zhi-Cheng Yang, 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; the central tube has a bottom, annular protrusion (). A bearing () is received in the central tube and mounted on the protrusion. A stator () is mounted around the central tube. A rotor () includes a shaft () having a free end () extending through the bearing and defining a notch () therein. A locking washer () engages into the notch of the shaft to limit movement of the shaft along an axial direction thereof. A balance structure () is arranged between the locking washer and the bearing. The balance structure is made of magnet and exerts a downwardly pulling force on the shaft to prevent the rotor from moving upwardly when the rotor is rotated.