US PATENT SUBCLASS 172 / 181-- .~.~.~.~ Concave furrowing disk with trailing tool

US PATENT SUBCLASS 172 / 181
.~.~.~.~ Concave furrowing disk with trailing tool

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

133	DF	DIVERSE TOOLS {29}
174	DF	.~ Rolling and non-rolling {2}
175	DF	.~.~ Following same path {5}
180	DF	.~.~.~ Rolling precedes non-rolling (same path) {1}
181		.~.~.~.~ Concave furrowing disk with trailing tool

DEFINITION

Classification: 172/181

(under subclass 180) Apparatus in which the earth working element of the rolling implement comprises a generally circular platelike member concave in a generally forward direction to form a furrow and the nonrolling implement includes an earth working element of the nonrolling type operating in said furrow.

(1) Note. The nonrolling tool may act to square off or undercut, etc., the furrow formed by the rolling tool.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164, for a rolling or rotating jointer followed by a moldboard-type tool.