US PATENT SUBCLASS 416 / 40
.~ Responsive to relative working fluid velocity

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}
40.~ Responsive to relative working fluid velocity {1}
41  DF  .~.~> Natural fluid current

DEFINITION

Classification: 416/40

(under subclass 31) Apparatus wherein the control means is operated in response to a means which senses the speed of the working fluid* relative to the apparatus.

(1) Note. The relative working fluid speed may be the measure of an impeller support (e.g., vehicle) movement through the medium, as commonly determined by a Pitot tube, or may be any other measurement of the relative working fluid flow either upstream or downstream of the impeller apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

37, for a device comprising automatic control in response to plural condition sensing and in which one of the conditions is relative working fluid flow velocity, (relative air speed of the vehicle, or wind force).