US PATENT SUBCLASS 416 / 180
.~ Blades projecting axially from concavo-convex annular web

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

179  DF  ROTOR HAVING FLOW CONFINING OR DEFLECTING WEB, SHROUD OR CONTINUOUS PASSAGE {4}
180.~ Blades projecting axially from concavo-convex annular web

DEFINITION

Classification: 416/180

(under subclass 179) Apparatus wherein the flow directing surface comprises a concave annular member defining a semicircle in cross section.