Patent ID: 11866999
Assignee: HYDAC TECHNOLOGY GMBH
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 8:
9. A cutting roller, comprising:
a fixed axle with an outside surface and an inner cavity;
a cutting ring rotatably guided on the outside surface of the axle by roller bearings between the cutting ring and the axle, at least part of the roller bearings being connected in fluid communication and being pressurized by pressure in the inner cavity;
a seal sealing the roller bearings from an environment outside of the axle and the cutting ring;
a compensator capable of compensating differential pressures between the roller bearings and the environment, the compensator including an elastically flexible separator element having an inside connected in fluid communication with the environment to be pressurized at environment pressure and having an outside connected in a pressurized manner to the roller bearings, the separator element being in the inner cavity of the axle, the separator element being held in the inner cavity of the axle by an end cap coupled to the axle, the end cap having an extension with an undercut wall part forming an annular groove opening in a direction of an outer axial end of the end cap facing an environment outside of the axle, the separator element having an edge bulge surrounding an open end of the separator element, the edge bulge having an annular part engaged in the annular groove; and
a pressurized connection between the roller bearings and the inner cavity in the axle including a cross channel opening into the inner cavity at one end of the cross channel and opening out of the axle at another end of the cross channel.