US PATENT SUBCLASS 416 / 44
.~ Impeller rotation speed responsive

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.~ Impeller rotation speed responsive {6}
45  DF  .~.~> Valve element directly movable by centrifugal force
46  DF  .~.~> Including pitch lock or adjustable stop
47  DF  .~.~> Control by means of separate motor {1}
49  DF  .~.~> Including reset or manual override of control {1}
51  DF  .~.~> Centrifugal mass moved along guided or lineal path
52  DF  .~.~> Centrifugal mass coaxial with impeller {1}

DEFINITION

Classification: 416/44

(under subclass 31) Apparatus comprising a rotating impeller* and control means which is caused to operate in response to a condition proportional to the rotational speed of the impeller.