US PATENT SUBCLASS 417 / 22
.~.~ One condition is speed of pump

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.~.~ One condition is speed of pump {2}
23  DF  .~.~.~> With common element sensing diverse condition to control motor and pump fluid valve
24  DF  .~.~.~> Speed sensor comprises auxiliary pump or electric generator

DEFINITION

Classification: 417/22

(under subclass 18) Subject matter in which one of the plural conditions to which the sensing means responds for causing

operations of the single drive motor control element is the rate of speed at which the pump is driven.