US PATENT SUBCLASS 172 / 155
.~ Laterally spaced like tools with intermediate diverse tool (A, B, A)

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

133  DF  DIVERSE TOOLS {29}
155.~ Laterally spaced like tools with intermediate diverse tool (A, B, A) {5}
156  DF  .~.~> Spaced rolling with intermediate nonrolling
157  DF  .~.~> Spaced non-rolling with intermediate rolling
158  DF  .~.~> All rolling
159  DF  .~.~> Spaced right and left hand tools with intermediate symmetrical tool
160  DF  .~.~> Including spike tooth

DEFINITION

Classification: 172/155

(under subclass 133) Apparatus comprising a pair of like earth working elements spaced laterally of the direction of travel and a diverse earth working element which operates along a path intermediate the paths of the like elements.

(1) Note. Laterally spaced right and left hand tools are considered to be like earth working elements under this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152+, for four laterally spaced tools which are alternately alike, but successively unlike.

193+, for a tool with a rearwardly spaced sweep or earth working blade, etc., which is attached to the tool standard or mounted on a member attached to the tool or its standard.