US PATENT SUBCLASS 172 / 159
.~.~ Spaced right and left hand tools with intermediate symmetrical tool


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

133  DF  DIVERSE TOOLS {29}
155  DF  .~ Laterally spaced like tools with intermediate diverse tool (A, B, A) {5}
159.~.~ Spaced right and left hand tools with intermediate symmetrical tool


DEFINITION

Classification: 172/159

(under subclass 155) Apparatus in which the laterally spaced earth working elements are nonidentical or positioned in a nonidentical way so as to function in a right and left handed manner and so located and constructed as to be mirror images of each other, and the intermediate earth working element comprises an element of symmetrical shape.

(1) Note. For the definition of a symmetrical tool see subclass 721.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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.

642, for relatively movable right and left hand tools for throwing soil to or from a crop row.

686, for right and left hand tools.

721+, for symmetrical tools.