US PATENT SUBCLASS 416 / 68
.~.~ Complemental pivoted surfaces

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

64  DF  TRANSLATORY REACTION MOTION {2}
66  DF  .~ Flexible or relatively movable working member or part {2}
68.~.~ Complemental pivoted surfaces

DEFINITION

Classification: 416/68

(under subclass 66) Apparatus wherein the working member comprises a plurality of surfaces which pivotally move to or from one another in a related manner to form a unitary device wherein the various surfaces have a similar working fluid reactive function.