EP2572791B1 EP11182565 9A EP11182565A EP2572791B1 EP 2572791 B1 EP2572791 B1 EP 2572791B1 EP 11182565 A EP11182565 A EP 11182565A EP 2572791 B1 EP2572791 B1 EP 2572791B1 Authority EP European Patent Office Prior art keywords wear wear tip rotor material tip holder Prior art date 2011 09 23 Legal status The legal status is an assumption and is not a legal conclusion