US PATENT SUBCLASS 416 / 161
.~.~ Axially movable impeller

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

147  DF  HAVING POSITIVE MEANS FOR IMPELLER ADJUSTMENT {6}
159  DF  .~ Power or manual actuator on non-rotatable part {5}
161.~.~ Axially movable impeller

DEFINITION

Classification: 416/161

(under subclass 159) Apparatus wherein the power or manual actuator effects an axial movement of the impeller as a unit relative to a supporting shaft which directly drives or is driven by the impeller.