US PATENT SUBCLASS 416 / 162
.~.~ Having motor

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}
162.~.~ Having motor

DEFINITION

Classification: 416/162

(under subclass 159) Apparatus wherein the mechanism for moving the impeller or working member is actuated by a motor.