Birch, Stewart, Kolasch & Birch, LLP
Fan blade
An impeller is applied to a centrifugal fan and includes fan blades and a hub. Each fan blade includes a first portion and a second portion. The first portion is located relatively close to the hub and the first portion is coupled to the second portion. The first portion has a windward side and a leeward side, and the windward side is parallel to the leeward side. The second portion is located relatively far away from the hub. The second portion has a windward side and a leeward side, and the windward side and the leeward side are two curved surfaces with different specific curvatures.
Delta Electronics, Inc.
F F
F04D F04D
inventional inventional
Chieh-Lung Chin-Fu Wen-Tsao Hsiu-Wei Kuo-Chen Heng-Yi Wen-Shi
Ho Lee Lee Wu Huang Chen Huang