US PATENT SUBCLASS 417 / 23
.~.~.~ With common element sensing diverse condition to control motor and pump fluid valve

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
18  DF  .~ Single motor control element responsive to means sensing diverse conditions {4}
22  DF  .~.~ One condition is speed of pump {2}
23.~.~.~ With common element sensing diverse condition to control motor and pump fluid valve

DEFINITION

Classification: 417/23

(under subclass 22) Subject matter having valve means for varying the flow of fluid being pumped, there being additionally provided a sensing means having a single sensing part for detecting a condition other than the rate of speed at which the pump is driven, the single sensing means causing operation of both the pump fluid valve means and the single drive motor control element.