Patent ID: 7937857

Claim:
A ground-working machine, comprising: a drive; advancement members, the advancement members being configured to advance a ground-working machine along a central axis of the ground-working machine, the contact points of the advancement members with the ground at least partially defining a positioning plane of the ground-working machine and the advancement members carrying a supporting structure apart from the positioning plane; and a kirving tool arranged on the supporting structure in the region of the central axis, the kirving tool having at least one kirving roller positionable in the transverse position for working a substrate on which the ground-working machine is positioned, the at least one kirving roller having kirving chisels on a circumference of the at least one kirving roller oriented toward the direction of rotation of the at least one kirving roller and, for kirving, can be rotated by the drive in the direction of rotation about a roller axis, the roller axis being pivotable about a steering axis, the steering axis being set apart from the advancement members in a direction of extension of the central axis by a distance which corresponds to at least one-half the width of the kirving roller, and the kirving roller being drivable in any rotational position with respect to the steering axis, wherein the steering axis intersects the roller axis or is situated at a distance from the roller axis which corresponds to a maximum of ⅗ of the width of the ground-working machine.