US PATENT SUBCLASS 172 / 563
.~.~ Cleaners with common operator

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

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
558  DF  .~ With disk cleaning means {6}
563.~.~ Cleaners with common operator {2}
564  DF  .~.~.~> Mounted on rock shaft
565  DF  .~.~.~> Operating means moves parallel to disk gang axis

DEFINITION

Classification: 172/563

(under subclass 558) Apparatus comprising a plurality of earth-removing means associated with a plurality of disks and means common to said plurality of earth-removing means for moving them towards and away from the disks.