Patent ID: 7331402

Claim:
A device for fastening blades to rings, the rings being transversely attached to a rotating shaft, in which the blades extending radially outward from the rings, each ring having at least one cutout in a side face of the ring, beginning at a periphery of the ring, and shaped to receive and to retain radially at least one complementary flat part of a blade support foot such that a side surface of the support foot is flush with a corresponding outer surface of the side face of the ring, the rings being mounted in a line on the rotating shaft and tightened axially and jointly against each other by axial tightening means in which successive opposite ring side faces, each having a cutout, bear against a side face having a cutout and against the blade support feet, locking the support feet completely inside respective cutouts, wherein each ring includes a plurality of cutouts which can receive, by nesting, support feet for flat blade segments, each blade segment bears at least one blade, and the blade segments of the ring are adjacent to one another in a circumferential direction, arranged in a support disc for the blade.