Fan and impeller thereof

Details Fan and impeller thereof Fan and impeller thereof

2011-04-05

2011-04-05

Nguyen, Ninh H (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Unsymmetrical impeller or dissimilar working members

C415S178000, C415S187000

Reexamination Certificate

active

07918651

ABSTRACT:
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.

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patent: 202004012015 (2005-12-01), None

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