US PATENT SUBCLASS 417 / 18
.~ Single motor control element responsive to means sensing diverse conditions

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
18.~ Single motor control element responsive to means sensing diverse conditions {4}
19  DF  .~.~> Sensing both inlet and outlet conditions
20  DF  .~.~> One condition is rate of flow to or from pump
21  DF  .~.~> One is motive fluid condition of fluid drive motor
22  DF  .~.~> One condition is speed of pump {2}

DEFINITION

Classification: 417/18

(under subclass 1) Subject matter comprising a single drive motor controlling element which is caused to be operated in response to means sensing plural conditions which are (1) different in kind, e.g., pressure and flow rate, or (2) if of the same kind, different by the part of the system characterized by the condition, e.g., inlet and discharge pressures of the pump.

(1) Note. The diverse condition may be a condition external of the pump or pump fluid system, e.g., a drive motor condition.