Electric blower assembly

Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...

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Details

417369, 417423A, 415119, 415211, F04B 1700, F04D 2966

Patent

active

040573702

ABSTRACT:
Electric blower assembly wherein air expelled by centrifugal force from impellers passes through volute chambers disposed peripherally with respect to said impellers and each defining a space which is increasingly larger as the distance from the impellers increases, whereby smooth air flow is produced in the volute chambers since the speed of air flow therethrough is lessened and pressure therein becomes static pressure. From the volute chambers air passes along inclined channels and then around a drive motor, whereby the drive motor is cooled. In entering at least part of each volute chamber air from the impellers comes into contact with a volute chamber wall extension which becomes gradually lower in a direction opposing that of impeller rotation whereby noise due to contact of a volute chamber wall by all portions of the air from the impeller does not occur simultaneously and a quieter blower assembly is provided.

REFERENCES:
patent: 1350927 (1920-08-01), Gomborow
patent: 2289231 (1942-07-01), Auger et al.
patent: 2658665 (1953-11-01), Tschudy
patent: 2915237 (1959-12-01), Galiulo et al.
patent: 3341113 (1967-09-01), Sebok et al.
patent: 3791772 (1974-02-01), Keimpema et al.

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