Vibration-damping fixing of moving blades for axial-flow turbo-machines

Claim 1

IN COMBINATION, A ROTOR FOR AN AXIAL FLOW TYPE TURBOMACHINE, SAID ROTOR INCLUDING AT LEAST ONE PERIPHERALLY EXTENDING UNDERCUT GROOVE FOR RECEIVING A ROW OF BLADES WHICH ARE INDIVIDUALLY MOUNTED IN SAID GROOVE, EACH SAID BLADE INCLUDING A BLADED PORTION EXTENDING RADIALLY OUTWARD FROM SAID GROOVE AND A ROOT PORTION LOCATED WITHIN SAID GROOVE, SAID ROOT PORTION INCLUDING A SINGLE BORE EXTENDING THERETHROUGH IN A DIRECTION TRANSVERSE TO THE PLANE OF THE ROTOR GROOVE, A SINGLE PIN EXTENDING THROUGH SAID BORE AND PROJECTING FROM THE ENDS THEREOF, AND A PACKING PIECE SECURED TO EACH PROJECTING END PORTION OF SAID PIN, SAID PACKING PIECES BEING LOCATED IN THE UNDERCUT PORTIONS OF SAID ROTOR GROOVE THEREBY TO RETAIN SAID BLADE IN SAID ROTOR GROOVE, AND SAID BLADED PORTION OF SAID BLADE HAVING A WIDTH NOT EXCEEDING THE WIDTH OF SAID ROTOR GROOVE AT THE SURFACE OF THE ROTOR SO AS TO ENABLE SAID BLADE TO PIVOT SLIGHTLY ABOUT THE PIN AXIS IN THE DIRECTION OF SAID GROOVE TO DAMPEN BLADE VIBRATION.