US PATENT SUBCLASS 416 / 88
.~ Variable work surface or non-rigid connection

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

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

DEFINITION

Classification: 416/88

(under subclass 87) Apparatus wherein (1) the working member surface area or configuration is alterable, as by collapsing or by telescoping parts, or (2) the working member is attached to a carrier or support solely by means which cannot sustain the member in a fixed position.