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:
Jul. 28, 2009
Filed:
May. 02, 2006
Chien-long Hong, Tu Cheng, TW;
Zhi-ya Yang, Shenzhen, CN;
Zhen-neng Lin, Shenzhen, CN;
Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Foxconn Technology Co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A cooling fan includes a fan housing () having a central tube () extending upwardly thereof, a bearing () received in the central tube, a stator () mounted around the central tube, a rotor () including a hub () having a shaft () extending from the hub into the bearing, and a oil retaining ring () mounted around the shaft. A slot () is defined in a top end () of the shaft of the rotor near the hub to prevent the escaping oil from continuously creeping out along the shaft. The slot is located between the retaining ring and the bearing. The bearing has a plurality of channels () defined in an outer surface thereof, for guiding the escaping oil to return to an oil reservoir defined in a bottom of the central tube.