Bi-directional cooling fan

Details Bi-directional cooling fan Bi-directional cooling fan

2011-08-30

2011-08-30

Yu, Justine (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Unsymmetrical impeller or dissimilar working members

C416S228000, C416S24100B

Reexamination Certificate

active

08007241

ABSTRACT:
A radial fan comprises a base with a plurality of straight primary blades radially oriented and substantially uniformly spaced around the circumference of the base. A like plurality of splitter vanes are interspersed between successive primary blades. The splitter vanes have a length that is about 50-70% of the length of the primary blades. The inner edges of the splitter vanes are angled to improve airflow through the inlet area between primary blades while reducing the occurrence of vortices and recirculation. The addition of splitter vanes increases the airflow capacity of the fan without any significant increase in operating noise.

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Photographs of motor Model No. K48ZZDRY-3152 by Emerson Electric Co., sold prior to 2006.

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