US PATENT SUBCLASS 172 / 531
.~ Wobble discs

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

518  DF  ROLLING, ROTATING OR ORBITALLY MOVING TOOL {30}
531.~ Wobble discs

DEFINITION

Classification: 172/531

(under subclass 518) Apparatus in which one or more substantially planar rotary tools is disposed at an angle to its axis of rotation whereby during rotation the tool will sweep back and forth laterally of its direction of traverse.