US PATENT SUBCLASS 417 / 29
.~.~ Fluid and motor controls separately responsive to diverse conditions

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.~.~ Fluid and motor controls separately responsive to diverse conditions {1}
30  DF  .~.~.~> Liquid accumulation controlled discharge valve downstream of motor controller sensing means {1}

DEFINITION

Classification: 417/29

(under subclass 26) Subject matter in which the valve means is controlled in response to one condition of the system and the control means for the motor is responsive to a second condition which (1) differs in kind from the first, e.g., pressure and flow rate, or (2) if of the same kind, differs by the part of the system characterized by the condition, e.g., inlet and discharge pressures of the pump.

SEE OR SEARCH THIS CLASS, SUBCLASS:

23, for a sensing means responsive to pump speed for causing operation of a pump drive motor control element and a sensing means responsive to a condition other than pump speed for causing operation of a pump fluid control valve.