US PATENT SUBCLASS 172 / 137
.~ With means to vary spacing of tools upon turning


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

133  DF  DIVERSE TOOLS {29}
137.~ With means to vary spacing of tools upon turning


DEFINITION

Classification: 172/137

(under subclass 133) Apparatus including means to alter the spacial relationship of the diverse earth working elements incident to a change in the direction of movement.

(1) Note. Tool mountings which merely permit relative movement between the tools in the absence of means to change the relationship upon turning are not classified in this and indented subclasses, but are classified below on other bases.

(2) Note. The variation in the spacing of the tools may be in a horizontal direction or may be a variation in the relative elevations of the tools.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255, for apparatus in which a tool is lifted out of or lowered into ground engagement incident to a change of direction of movement.

SEE OR SEARCH CLASS

280, Land Vehicles, 456.1+, for articulated vehicles having plural connections therebetween.