US PATENT SUBCLASS 416 / 82
.~ Relatively movable working member portions

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

79  DF  OSCILLATORY REACTION MOTION {4}
82.~ Relatively movable working member portions

DEFINITION

Classification: 416/82

(under subclass 79) Apparatus wherein the working member comprises a plurality of sections which move relative to one another.