Comminution machine
A comminution machine included in an earth working machine which can be moved over a terrestrial area to be worked in a direction of working comprises a rotating roller comminution device. A grader blade is mounted on the comminution machine down stream from the comminution device in the direction of working.
1. A comminution machine capable of being moved over ground to be worked in a direction of working, comprising;
a) a comminution device including a rotatable roller;
b) a grader blade on the comminution device, downstream of the comminution device in the direction of working;
c) an actuating device for fixing the grader blade to the comminution device for enabling the grader blade to be lowered to the earth worked by the comminution machine, and for causing the grader blade to be pressed with a predetermined force against the earth worked by the comminution machine, and
d) a positioning device connected to and between the grader blade and the actuating device for enabling the grader blade to be tilted independently of the comminution device about an axis extending in the direction of working, and parallel to the earth worked and pivoted independently of the comminution device about an axis perpendicular to the earth worked, the positioning device being coupled with the grader blade for enabling the grader blade to be fixed in any desired position within a predetermined tilting or pivoting range.
2. The machine of claim 1 wherein the rotatable roller is arranged to crush stone to prepare a gravel road.