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. 28, 2012
Filed:
Jun. 20, 2009
Ching-bai Hwang, Taipei Hsien, TW;
Zhi-hui Zhao, Shenzhen, CN;
Ching-Bai Hwang, Taipei Hsien, TW;
Zhi-Hui Zhao, Shenzhen, CN;
Furui Precise Component (Kunshan) Co., Ltd., KunShan, Jiangsu Province, CN;
Foxconn Technology Co., Ltd., Tu-Cheng, New Taipei, TW;
Abstract
A centrifugal fan includes a top cover plate, a bottom plate, a sidewall and an impeller. The sidewall is defined with an air outlet. The impeller includes a hub and a plurality of blades extending radially outwardly from the hub. An air passage channel is defined between outmost free ends of the blades and an inner surface of the sidewall. A tongue is provided near the air outlet and protrudes inwardly and laterally from the inner surface of the sidewall towards the outmost free ends of the blades. The tongue has an outer surface facing the outmost free ends of the blades. A plurality of grooves is defined in the outer surface along a lengthwise direction of the tongue.