Birch, Stewart, Kolasch & Birch, LLP
Fan and impeller thereof
An impeller includes a hub, a plurality of first blades, and a plurality of second blades. The first blades are disposed around the hub. The second blades are disposed between the first blades. The lengths of the second blades are shorter than those of the first blades. The impeller can avoid the airflow reflux and have good airflow efficiency.
Delta Electronics, Inc.
F
F04D
inventional
Chen-Mo Hung-Chi Chung-Kai
Jiang Chen Lan