Noise reduction in an air moving apparatus

Details Noise reduction in an air moving apparatus Noise reduction in an air moving apparatus

2005-02-08

2005-02-08

Nguyen, Ninh H. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Method of operation

C416S500000, C416S14600A, C415S119000, C415S914000, C381S071300

Reexamination Certificate

active

06851930

ABSTRACT:
An air moving apparatus for generating cooling airflow is provided that includes a noise reduction system for reducing noise generated by a fan. The air moving apparatus includes a fan having a rotatable hub and a plurality of blades mounted to the hub for rotating about an axis of rotation to provide pressurized airflow. A sensor is situated on a surface of at least one fan blade for sensing airflow characteristics of the air flowing over the fan blade. An actuator, also situated on the surface of the fan blade, changes the characteristic of the airflow over the fan blade in response to the sensed airflow characteristic.

REFERENCES:
patent: 5636287 (1997-06-01), Kubli et al.
patent: 5668744 (1997-09-01), Varadan et al.
patent: 5791869 (1998-08-01), Lee
patent: 5979593 (1999-11-01), Rice et al.
patent: 6299410 (2001-10-01), Hilbert et al.

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