Centrifugal fan

Details Centrifugal fan Centrifugal fan

1986-06-13

1989-08-22

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Temperature or fluid force responsive member

415157, F04D 2956

Patent

active

048591408

ABSTRACT:
A centrifugal fan in which the cone and wheel have a telescoping relationship to vary the rated capacity of the fan. The mechanism effects the relative movement manually, or by a servo arrangement responsive to system pressure. The telescoping relationship includes an anti-recirculation sleeve on the cone. The wheel and cone can be moved to effect engagement of the cone and the wheel back plate to cut off the fan, when in a parallel arrangement, and to arrest wheel movement, after the drive to the wheel has been stopped. In another aspect, the cone and wheel are bodily stationary and a separate movable flow control sleeve is positioned to control flow.

REFERENCES:
patent: 2143100 (1939-01-01), Anderson
patent: 2771239 (1956-11-01), Moreillon
patent: 2993640 (1961-07-01), Moreillon
patent: 3625629 (1971-12-01), Morrison et al.
patent: 3861824 (1975-01-01), Sjoqvist et al.
patent: 4050660 (1977-09-01), Eggmann et al.
patent: 4253796 (1981-03-01), Philipps et al.

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