US PATENT SUBCLASS 172 / 53
.~.~.~ Rectilinearly reciprocating tool

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}
50  DF  .~.~ Diverse tools {3}
53.~.~.~ Rectilinearly reciprocating tool

DEFINITION

Classification: 172/53

(under subclass 50) Apparatus in which at least one of the driven, diverse earth working elements is moved back and

forth in a straight line path.