US PATENT SUBCLASS 417 / 44.4
.~.~.~ Low pressure stops motor from turning on pump

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
44.1  DF  .~ By control of electric or magnetic drive motor {3}
44.2  DF  .~.~ Responsive to pump fluid pressure {7}
44.4.~.~.~ Low pressure stops motor from turning on pump

DEFINITION

Classification: 417/44.4

Low pressure stops motor from turning on pump:

(under subclass 44.2) Apparatus wherein the motor comprises an electrical contact having an opened position and a closed position and the contact remains in the opened position as long as the sensed pressure of the fluid remains below a predetermined value.