| 摘要 |
<p>A self-propelled earth breaking machine, comprising a chassis supported on ground engaging means (18, 19) in the form of drums (22) carrying prongs or tynes (21) extending radially outwardly thereof and curving generally in the direction of rotation of the drums, whereby the prongs will in turn initially contact the earth at right angles thereto and subsequently penetrate in through the earth and thereafter out of the earth to break it down into discrete clumps as well as providing traction for the machine. The prongs are spaced circumferentially in rows (23) around the drum with the prongs in respective rows being so positioned relative to those in adjacent rows as to form helixes across the drums.</p> |
