System and method for reducing back flow

Details System and method for reducing back flow System and method for reducing back flow

2006-01-31

2008-09-16

Look, Edward (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

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

Impeller rotation speed responsive

C416S131000, C415S141000

Reexamination Certificate

active

07425117

ABSTRACT:
A system and method of reducing back flow in an air mover having one or more blades is described. A flap is attached to a blade of the air mover such that, when back flow occurs, the flap obscures all or a portion of the space between blades during back flow.

REFERENCES:
patent: 3006534 (1961-10-01), McDonald
patent: 6386826 (2002-05-01), Jacob
patent: 6474936 (2002-11-01), deBlanc et al.
patent: 6547519 (2003-04-01), deBlanc et al.
patent: 7184268 (2007-02-01), Espinoza-Ibarra et al.

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