Fluid reaction surfaces (i.e. – impellers) – Protective screen or guard – Water or marine propellers
Patent
1998-08-31
2000-01-18
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Protective screen or guard
Water or marine propellers
4151212, B63H 128
Patent
active
060152656
ABSTRACT:
A box fan which includes an air divider ring as part of the front grill, which ring results in increases in the peak velocity of the air supplied by the fan, and the cubic foot per minute of the supplied air.
REFERENCES:
patent: 2950859 (1960-08-01), Kirk
patent: 3867058 (1975-02-01), Hendrickson
patent: 4350472 (1982-09-01), Morimoto
patent: 5118252 (1992-06-01), Chaney
Lasko William E.
Wilson Rodney
Zwakenberg Ralph
Lasko Holdings Inc.
Look Edward K.
Nguyen Ninh
Wobensmith, III Zachary T.
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