US PATENT SUBCLASS 172 / 49
.~.~ Contiguous cooperating or intermeshing rotary ground engaging tools

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

35  DF  WITH DRIVE MEANS FOR TOOL OR CLEANER {37}
48  DF  .~ Plural driven tools {6}
49.~.~ Contiguous cooperating or intermeshing rotary ground engaging tools {1}
49.5  DF  .~.~.~> Rotating about vertical axes

DEFINITION

Classification: 172/49

(under subclass 48) Apparatus in which separate earth working elements travel in circular paths in contact with the earth and in which (1) said paths intersect and overlap or (2) said earth working elements are disposed immediately adjacent each other to cooperate in treating the intermediate earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

36, for driven earth working elements which cooperate in the manner of shears or nippers under the surface of the earth.