Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Responsive to moving member developed fluid force – current...
Reexamination Certificate
2007-02-28
2011-11-15
Wiehe, Nathaniel (Department: 3745)
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Responsive to moving member developed fluid force, current...
C415S146000, C415S211200
Reexamination Certificate
active
08057161
ABSTRACT:
A fan structure, suitable for rack-mounting adjacent to heat-generating electrical equipment, features an improved noise-damping outflow baffle containing a plurality of non-return flaps, serving to prevent reverse flow of air when fan activity is interrupted. In a preferred embodiment, four generally sickle-shaped flaps are used, each connected, along a straight edge thereof, by a pair of elastomeric hinge connections to a surrounding frame. The hinge connections urge the flaps closed whenever they are not forced by airflow into an open orientation. The axes of rotation of the flaps are chosen to keep them from jamming against one another. Since the flaps act as vanes, tending to straighten out an originally helical flow of air induced by the fan, they minimize the pressure drop which has therefore been associated with outflow baffles. The use or elastomers at critical points in the structure reduce noise and clatter.
REFERENCES:
patent: 3263906 (1966-08-01), Ward
patent: 3334569 (1967-08-01), Lambie
patent: 6011689 (2000-01-01), Wrycraft
patent: 6017191 (2000-01-01), Harmsen
patent: 6031717 (2000-02-01), Baddour et al.
patent: 6115250 (2000-09-01), Schmitt
patent: 6174232 (2001-01-01), Stoll et al.
patent: 6398492 (2002-06-01), Cho et al.
patent: 6561762 (2003-05-01), Hong et al.
patent: 6663342 (2003-12-01), Huang et al.
patent: 6705833 (2004-03-01), Tam et al.
patent: 6939105 (2005-09-01), Horng et al.
patent: 7014420 (2006-03-01), Chang et al.
patent: 7025086 (2006-04-01), Maeda et al.
patent: D603951 (2009-11-01), Seidler
patent: 2003/0026691 (2003-02-01), Huang et al.
patent: 2003/0091435 (2003-05-01), Horng et al.
patent: 2006/0039784 (2006-02-01), Yan et al.
patent: 2011/0116909 (2011-05-01), Weisser et al.
patent: 1 016 790 (2000-05-01), None
EBM-PAPST St. Georgen GmbH & Co. KG
Oliver Intellectual Property LLC
Oliver, Esq. Milton
Wiehe Nathaniel
LandOfFree
Fan with integrated nonreturn flaps does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fan with integrated nonreturn flaps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan with integrated nonreturn flaps will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4279257