US PATENT SUBCLASS 172 / 591
.~.~.~ With manual actuator

Current as of: June, 1999
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172 /   HD   EARTH WORKING

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
579  DF  .~ Plural groups of disks {5}
584  DF  .~.~ Horizontally angularly adjustable group {9}
591.~.~.~ With manual actuator {3}
592  DF  .~.~.~.~> Concentric controls
593  DF  .~.~.~.~> Separate handles for independent gang adjustment
594  DF  .~.~.~.~> Double tandem groups

DEFINITION

Classification: 172/591

(under subclass 584) Apparatus comprising an actuator powered by an attendant, the operation of which moves a group or is effective to vary the range of movement caused by some other means.

(1) Note. The mere operation of a latch is not included.

(2) Note. See the class definition for the meaning of "actuator".