Patent ID: 8434705

Claim:
Shredding device, comprising a driving unit driving at least one rotor, the rotor being rotatable about a rotor axis and having a periphery and having shredding tools on the periphery for comminuting shredding material, the shredding tools being arranged to interact with at least one counter knife assembly that during the shredding operation of the device is arranged in a stationary manner with respect to a machine housing of the device, wherein the counter knife assembly comprises at least two counter knife bars arranged parallel to each other and one above the other in a rotating direction of the rotor, the counter knife bars including a lower counter knife bar and one or more succeeding upper counter knife bars thereabove, the counter knife bars being radially displaceable with respect to the rotor axis by different amounts relative to one another by means of an adjustment mechanism so as to compensate for wear at the shredding tools and/or the counter knife assembly, wherein the lower counter knife bar has a thickness that is lower than a thickness of the shredding tools such that wear that occurs at the lower counter knife bar is higher than wear that occurs at the shredding tools.