Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...
Patent
1986-12-17
1988-08-02
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With sound or vibratory wave absorbing or preventing means...
415DIG1, 415192, F04D 2954
Patent
active
047611154
ABSTRACT:
A frame-supported fan in which the mounting portions between the motor and the frame are formed in the shape of an arrowhead and/or are provided with sculptured edges extending to the frame or are provided with interfering bodies mounted to the outer ends of the edges of the frame, so as to reduce unwanted noise by producing non-uniform flow separation in the air stream through the fan.
REFERENCES:
patent: 2142307 (1939-01-01), De Mey et al.
patent: 3362627 (1968-01-01), Pabst
patent: 4089618 (1978-05-01), Patel
patent: 4482302 (1984-11-01), Grignon
Garrett Robert E.
Pitko Joseph M.
Standard Elektrik Lorenz AG
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