Patent ID: 8113920

Claim:
An apparatus comprising: at least one grind-active cutting ring having a first and second surface and at least one bore through the at least one grind-active cutting ring and a plurality of depressions located in both the first and second surface of the at least one grind-active cutting ring adjacent the bore; and at least two clamping plates having outer peripheral edges and being structured to clamp the at least one grind-active cutting ring, wherein at least portions of the outer peripheral edges of the at least two clamping plates are positionable within the at least one bore to engage an inside edge of the at least one bore and at least other portions of the outer peripheral edges of the at least two clamping plates are positionable within the depressions, whereby the at least two clamping plates are structured to fit the at least one grind-active cutting ring in a clamping force fit connection.