US PATENT SUBCLASS 416 / 225
.~ Having spanwise compression means

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

223 R  DF  SPECIFIC BLADE STRUCTURE (E.G., SHAPE, MATERIAL, ETC.) {18}
225.~ Having spanwise compression means

DEFINITION

Classification: 416/225

(under subclass 223) Apparatus wherein the blade includes reinforcing means extending longitudinally thereof serving to compress the blade parts and resist the action of longitudinal forces (e.g., centrifugal) thereon.