(under the class definition) Apparatus including an unearthing apparatus and a wheel- or runner-supported frame which frame is interconnected by a transverse horizontal pivot to an additional wheel- or runner-supported frame, the unearthing apparatus being mounted on one or both of said frames and there being provided a means for varying the included angle between the two frames by simultaneously swinging each said frame about the horizontal pivot to thereby selectively alter the vertical position or attitude of said unearthing apparatus or portions thereof.
SEE OR SEARCH CLASS
111, Planting,
56, for planters with break joint frames.
172, Earth Working,
323, 326+ and 395+ for earth working apparatus which may include a break frame.
