US PATENT SUBCLASS 416 / 47
.~.~ Control by means of separate motor

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

31  DF  WITH CONTROL MEANS RESPONSIVE TO NON-CYCLIC CONDITION SENSING, CENTRIFUGAL ACTUATION, TORQUE OR THRUST {9}
44  DF  .~ Impeller rotation speed responsive {6}
47.~.~ Control by means of separate motor {1}
48  DF  .~.~.~> Motor carried by impeller

DEFINITION

Classification: 416/47

(under subclass 44) Apparatus wherein the control means which acts on the apparatus part comprises a motor solely for that purpose actuable by the means responsive to the impeller rotation speed.

(1) Note. A motor for this subclass does not include a mere spring or weight device but must comprise an energy conversion means such as a hydraulic, pneumatic or electric motor.