Multi-blade fan

Details Multi-blade fan Multi-blade fan

2007-03-26

2011-10-04

Stark, Jarrett (Department: 2823)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Irregular, flanged or channel forming blade surface

C416S22300B

Reexamination Certificate

active

08029242

ABSTRACT:
In a multi-blade fan provided with a plurality of notches in a blade edge in an outer side of each impeller blade, it is possible to direct an impeller blade outlet in a portion of the notches to a circumferential direction. Also, it is possible to direct an air flow blown out of the fan to the circumferential direction. Further, it is possible to effectively increase a pressure, by setting a projection protruding along a thickness direction of the impeller blade in a rear portion of each notch, in a pressure surface of the impeller blade receiving air pressure on the basis of rotation of the multi-blade fan.

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