US PATENT SUBCLASS 416 / 87
RADIALLY EXTENSIBLE OR RETRACTIBLE ROTOR WORKING MEMBER


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

87RADIALLY EXTENSIBLE OR RETRACTIBLE ROTOR WORKING MEMBER {2}
88  DF  .~> Variable work surface or non-rigid connection
89  DF  .~> Having pitch adjustment


DEFINITION

Classification: 416/87

(under the class definition) Apparatus comprising a rotating working member* and wherein the working member dimension normal to the rotation axis may be lengthened or shortened to change the effective operative diameter of the apparatus.

(1) Note. This subclass does not include mere cyclic radial movement of a working member wherein the overall diameter of the impeller remains unchanged.