US PATENT SUBCLASS 417 / 30
.~.~.~ Liquid accumulation controlled discharge valve downstream of motor controller sensing means

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.~.~.~ Liquid accumulation controlled discharge valve downstream of motor controller sensing means {1}
31  DF  .~.~.~.~> Motor controller responsive to liquid pressure

DEFINITION

Classification: 417/30

(under subclass 29) Subject matter in which the fluid control means comprises a valve in the discharge of the pump which is farther from the pump, on the discharge side, than the sensing means for the drive controlling means, said valve being controlled in response to the collection of liquid in a receiver or receptacle located in the pump discharge line.