Noise-reduced vacuum appliance

Details Noise-reduced vacuum appliance Noise-reduced vacuum appliance

A - Human Necessities

47

L

A47L 9/00 (2006.01) G10K 11/175 (2006.01)

Patent

CA 2545977

A vacuum appliance includes a motor having a rotatable shaft. An air flow generating member is connected to the shaft. The air flow generated by the rotating member generates noise having a frequency and corresponding wavelength. An air flow path receives air generated by the rotating member. The air flow path has first and second channels, the lengths of which define a predetermined difference therebetween to cancel the noise. In certain embodiments, the difference is corresponds to one-half wavelength.

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