(under subclass 133) Apparatus in which one of the earth working elements is given a rotating motion by the resistance of the earth as it is drawn thereover and another earth working element is of a nonrolling type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
143, for diverse tools including an intermittently rolling tool.
149+, for three or more diverse implements following the same path, at least one of which is of the rolling type.
153, for at least four laterally spaced diverse tools alternate tools being of the rolling type.
156, and 157, for laterally spaced like tools with an intermediate diverse tool of the rolling and nonrolling type.
164, for a rolling jointer and plow. 166, for a rolling colter combined with a diverse tool.
169, for diverse tools one of which is rotatable about a vertical axis.
170, for diverse tools including a smooth leveling roller.
