US Patent 9073056 Comminution device

Described is a comminution device, in particular a comminution device including an adjusting mechanism, the adjusting mechanism including a hydraulic cylinder which is coupled between the first and the second cutting element and is in hydraulic communication with a closed hydraulic and pneumatic volume, which is filled with a hydraulic fluid in a first part and with air in a second part, and the wall of which is at least partially transparent so that the hydraulic fluid level can be read from a scale which displays a wear condition of the first and second cutting element.