US PATENT SUBCLASS 172 / 642
.~ Pair of tools cooperate to move earth to or from plant row


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

613  DF  PLURAL RELATIVELY MOVABLE TOOLS {14}
642.~ Pair of tools cooperate to move earth to or from plant row


DEFINITION

Classification: 172/642

(under subclass 613) Apparatus in which the earth engaging elements of a pair are nonidentical or positioned in a nonidentical way so as to function in a right and left handed manner in working the earth rather than in an identical manner, the elements being arranged to operate on opposite sides of a crop row for the purpose of simultaneously moving soil onto or away from said row.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70, 71+ and 73, for pairs of nondriven earth working elements which cooperate on opposite sides of a plant row in a right and left hand manner and which are disposed forwardly of or to the rear of a driven earth working element.

159, for laterally spaced right and left hand elements with an intermediate symmetrical element.

686, for plural elements of the right and left hand type.