US PATENT SUBCLASS 417 / 44.1
.~ By control of electric or magnetic drive motor

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
44.1.~ By control of electric or magnetic drive motor {3}
45  DF  .~.~> By changing electrical characteristic of motor or motor circuit
44.2  DF  .~.~> Responsive to pump fluid pressure {7}
44.11  DF  .~.~> Responsive to change in electrical operating characteristic

DEFINITION

Classification: 417/44.1

By control of electric or magnetic drive motor:

(under subclass 1) Subject matter in which the motor is of the type having a working member (e.g., armature) which is

motivated by electricity or a magnetic field.

(1) Note. Collected in this subclass are patents directed to system condition responsive control of drive motors of the type commonly referred to as magnetic or electromagnetic clutches.