Box fan with air divider ring

Fluid reaction surfaces (i.e. – impellers) – Protective screen or guard – Water or marine propellers

Patent

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Details

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

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