US PATENT SUBCLASS 416 / 46
.~.~ Including pitch lock or adjustable stop

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}
46.~.~ Including pitch lock or adjustable stop

DEFINITION

Classification: 416/46

(under subclass 44) Apparatus wherein the apparatus includes means for retaining the impeller or working member in a selected position of adjustment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

140, for a mere centrifugally actuated stop means for preventing droop beyond a predetermined point of a resiliently mounted, articulated or self-shifting impeller, in the absence of automatic control means under the definition of this subclass 44.