Multi-blade blower

Details Multi-blade blower Multi-blade blower

1993-11-24

1995-05-30

Look, Edward K.

Rotary kinetic fluid motors or pumps

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

F04D 1704

Patent

active

054196809

ABSTRACT:
A multi-blade blower with a reduced operating noise. The blower has a casing 3, inside of which a noise generator of a circular cross sectional shape is arranged at a position adjacent a throat of the scroll passageway. The noise generator has a radial gap S with respect to the outer edge of blade which is the same as a radial gap of the throat with the outer edge of the blade, and the spacing between the throat and the noise generator in the direction of the rotation of the wheel is 1.5 times of the blade pitch of the wheel.

REFERENCES:
patent: 2037940 (1936-04-01), Stalker
patent: 3477635 (1969-11-01), Glucksman
patent: 4025223 (1977-05-01), Anders et al.
patent: 4915583 (1990-04-01), Vera et al.
patent: 5314300 (1994-05-01), Gatley, Jr. et al.
patent: 5316439 (1994-05-01), Gatley, Jr. et al.

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