| abstract |
TRENCHING MACHINE FOR CUTTING PREFERABLY FROZEN GROUND Abstract of the Disclosure Disclosed is a trenching machine comprising a vehicle of a tractor type, a drive mechanism, a spoil discharge conveyor assembly, and a digging apparatus including a boom connected with its one end to the vehicle, a power means for raising and lowering the boom, a guide means mounted on the boom, a carrying means moving along the guide means, teeth mounted on the carrying means along alternate first cutting lines and second cutting lines in the direction of movement of the carrying means, the number of the teeth minuted along the first cutting lines being greater than that of the teeth mounted along the first cutting lines across the width of the carrying means being greater than the width of the teeth mounted along the second cutting lines. |