Blower having a sound-damping structure

Details Blower having a sound-damping structure Blower having a sound-damping structure

1990-08-02

1992-05-05

Denion, Thomas E.

Rotary kinetic fluid motors or pumps

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

181224, 181225, F01D 510

Patent

active

051102587

ABSTRACT:
A blower comprises an impeller which can function to raise the pressure of a fluid and delivers it; a driving device for driving the impeller; and a fan casing which includes a fluid path to inspire the fluid from the outside and deliver it to the outside through the impeller; wherein the fan casing is at least partly formed by a hard porous structural unit whose specific gravity is continuously changed in at least one of the direction of thickness and a direction of surface.

REFERENCES:
patent: 3485443 (1969-12-01), Earhart
patent: 3540547 (1970-11-01), Coward
patent: 3709774 (1973-01-01), Kimura
patent: 3718532 (1973-02-01), Hayes, Jr.
patent: 3890060 (1975-06-01), Lipstien
patent: 3947148 (1976-03-01), Holt
patent: 4234291 (1980-11-01), Hurst et al.
patent: 4296831 (1981-10-01), Bennett
patent: 4807718 (1989-02-01), Lotz

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