Axial flow ring fan with fall off

Details Axial flow ring fan with fall off Axial flow ring fan with fall off

1989-06-08

1990-04-10

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416192, 416242, F04D 2938

Patent

active

049155881

ABSTRACT:
An axial flow ring fan has improved efficiency and reduced noise by making the leading edge of each blade a generally sinusoidal shape and projecting this geometry throughout the blade by imparting fall off to each blade.

REFERENCES:
patent: 1518501 (1924-12-01), Gill
patent: 2684723 (1954-07-01), Faber
patent: 3416725 (1968-12-01), Bohanon
patent: 4358245 (1982-11-01), Gray
patent: 4505641 (1985-03-01), Tsuchikawa et al.
patent: 4548548 (1985-10-01), Gray
patent: 4569631 (1986-02-01), Gray
patent: 4569632 (1986-02-01), Gray
patent: 4684324 (1987-08-01), Perosino
patent: 4737077 (1988-04-01), Vera
patent: 4768472 (1988-09-01), Hagashi et al.

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