Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – With runner having conical hub including small diameter...
Reexamination Certificate
2009-12-29
2011-11-08
Wiehe, Nathaniel (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
With runner having conical hub including small diameter...
C416S18600A, C416S188000, C416S242000
Reexamination Certificate
active
08052386
ABSTRACT:
A mixed flow fan wheel has a convex hub, an axially-spaced away concave annular shroud, and a plurality of angularly distributed blades extending between and interconnecting the hub and shroud, all which cooperatively define a plurality of inter-blade flow channels. Each has a pressure surface and spaced suction surface extending not only between spaced inlet and discharge edges but also, crosswise thereto, spaced hub-side and shroud-side edges. Each discharge edge is convex relative a center of geometry of the blade therefor. Each inter-blade flow channel originates in a generally rectangular shape between flanking inlet edges and terminates in another generally rectangular shape between flanking discharge edges, with a procession of gradations of generally rectangular shapes forming a progressive transition therebetween. Moreover, each inter-blade flow channel twists or corkscrews from inlet thereof to the discharge.
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Fitzpatrick Erich R.
Jennings Rickey W.
Valbracht Robert A.
Bay Jonathan A.
Loren Cook Company
Wiehe Nathaniel
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