US PATENT SUBCLASS 416 / 229 A
.~.~ Turbo machine

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}
229 R  DF  .~ Laminated, embedded member or encased material {2}
229 A.~.~ Turbo machine

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 416/229

(under subclass 223) Apparatus wherein the impeller blade (1) is fabricated by bonding or fastening together a plurality of layers of material, (2) comprises a structural part, such as a stiffening member, set within a constituent part of the blade as by being molded therein, or (3) comprises blade forming material enclosed within a shell or casing.