US PATENT SUBCLASS 416 / 27
.~ Pitch adjustment and throttle regulation with condition sensing means

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

25  DF  INTERRELATED CONTROLS FOR IMPELLER AND DRIVE MEANS {2}
27.~ Pitch adjustment and throttle regulation with condition sensing means {3}
28  DF  .~.~> Temperature responsive control
29  DF  .~.~> Drive engine intake air responsive control
30  DF  .~.~> Electrical control or sensing means

DEFINITION

Classification: 416/27

(under subclass 25) Apparatus wherein the impeller operation or adjustment control means comprises means for varying the blade angle* of an impeller and the control means for the impeller driving or driven means comprises means for varying the flow or fuel or motive fluid to an impeller drive engine or motor, at least one of the controls being actuated by means which senses a condition.