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:
Jan. 24, 2012
Filed:
Mar. 27, 2008
Yong-kang Zhang, Shenzhen, CN;
Zhi-ya Yang, Shenzhen, CN;
Ying-liang LI, Shenzhen, CN;
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 (), a stator (), a rotor () and a bearing assembly (). A tube () extends upwardly from a central portion of the fan housing. The stator is mounted around the tube. The bearing assembly includes a ball bearing () and a sleeve bearing () received in two ends of the tube, respectively. The rotor has a shaft () extending into and roratably supported by the bearing assembly. An elastic element () is arranged on the ball bearing to provide a pressing force on the ball bearing toward the sleeve bearing. An oil retaining element () is arranged around a bottom end of the shaft and spaced from the shaft. The oil retaining element is attached to the sleeve bearing to provide oil for the sleeve bearing.