(under subclass 35) Apparatus in which a driven earth working element in the form of a narrow elongated shaft or bar is disposed transversely to the line of draft and is rotatably supported wholly below the surface of the earth.
(1) Note. The usual purpose of the subsurface rotary shafts of this subclass is to stir up the soil usually to loosen weeds.
(2) Note. The elongated rod may be articulated or provided with projecting elements such as teeth.
(3) Note. The rod is generally rotatably supported at the lower end of "gooseneck" type standards and there may be a number of such standards some rotatably supporting the rod and others disposed forwardly of or to the rear of the rod and carrying at the lower ends thereof earth working teeth such as plows, chisels, etc.
