US PATENT SUBCLASS 415 / 31
.~.~ Helix or screw runner

Current as of: June, 1999
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415 /   HD   ROTARY KINETIC FLUID MOTORS OR PUMPS

13  DF  WITH CONTROL MEANS RESPONSIVE TO NON-CYCLIC CONDITION SENSING, CENTRIFUGAL ACTUATION OR TORQUE {13}
30  DF  .~ By shaft speed or torque responsive means {5}
31.~.~ Helix or screw runner

DEFINITION

Classification: 415/31

(under subclass 30) Apparatus comprising a runner* having a blade* which is wrapped or coiled at least 360 deg. around an axis.

(1) Note. The blade* may extend longitudinally or the edges may all be in a plane.