Ceiling fan

Details Ceiling fan Ceiling fan

1986-07-17

1988-03-15

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Oscillatory reaction motion

Compound motion

416 5, 416170R, F04D 2936

Patent

active

047309814

ABSTRACT:
A ceiling fan adapted for use in factories and office buildings, the ceiling fan including flapping vanes capable of vertically flapping during rotation, the double movement of the vanes being effective to stir and circulate the air in the room in a wide range. To effect the flapping of the vanes no wire or elevating members are used unlike the prior ceiling fan having flapping vanes.

REFERENCES:
patent: 332820 (1885-12-01), Murray
patent: 1150313 (1915-08-01), Stauffer et al.
patent: 1227291 (1917-05-01), Miller
patent: 1362036 (1920-12-01), Parker
patent: 1409090 (1922-03-01), Glasser
patent: 1577461 (1926-03-01), Glasser
patent: 1864316 (1932-06-01), Poniatowski
patent: 2674407 (1954-04-01), Ostrognai
patent: 3167130 (1965-01-01), Day
patent: 4560321 (1985-12-01), Kawai
patent: 4640668 (1987-02-01), Yang

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