Patents Represented by Attorney William J. O'Driscoll Beres

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  • Centrifugal fan having variable width blades
    Patent number: 5207557
    Abstract: A centrifugal fan has blades the effective width of which are variable during fan operation through the actuation of modulation apparatus which rotates with the fan wheel and is driven thereby. The modulation apparatus isolates the blocked off and unused portions of the fan blades which prevents the interaction of the blocked off portion of the blades with air flowing through the fan housing in a manner which results in a highly efficient and extremely quiet fan.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: May 4, 1993
    Assignee: American Standard Inc.
    Inventors: William A. Smiley, III, George T. Brockman