Impeller for vacuum cleaner with tapered blades

Details Impeller for vacuum cleaner with tapered blades Impeller for vacuum cleaner with tapered blades

1995-11-08

1996-11-12

Look, Edward K.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

415206, 416185, 416223B, 4174232, F04D 2966, F04D 2930

Patent

active

055733697

ABSTRACT:
A fan for a vacuum cleaner has a fan housing, a motor and an impeller. The fan housing has an inlet, an outlet, a scroll-shaped side wall, a back wall and a flat front wall. The impeller has a hub and multiple blades. The blades have a leading edge that is tapered upward, a top edge that is tapered downward, and a trailing edge that is tapered downward. Such tapering of the top edge and trailing edge provides less noise and better durability without diminishing air performance.

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W. Neise, "Review of Noise Reduction Methods for Centrifugal Fans," Journal of Engineering for Industry, May, 1982, vol. 104, pp. 151-153.

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