US PATENT SUBCLASS 417 / 31
.~.~.~.~ Motor controller responsive to liquid pressure

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
26  DF  .~ With condition responsive control of pump fluid valve {3}
29  DF  .~.~ Fluid and motor controls separately responsive to diverse conditions {1}
30  DF  .~.~.~ Liquid accumulation controlled discharge valve downstream of motor controller sensing means {1}
31.~.~.~.~ Motor controller responsive to liquid pressure

DEFINITION

Classification: 417/31

(under subclass 30) Subject matter in which the drive control means is responsive to the liquid pressure in the pump discharge line.