Patent ID: 7040866

Claim:
A system for retaining an annular plate against a radial face of a disk, the disk presenting in said radial face an annular recess defined by a plurality of walls one of which is formed by a face of a flange which extends radially outwards, said plate presenting in its radially inner portion an annular base pressing against the radially outer wall of the recess and a root extending radially towards the inside of the recess from the axially inner end of the base, said system including a split annular retaining ring disposed in the recess, wherein said flange presents a top end of crenellated outline provided with at least one notch, wherein said root is provided in its radially inner portion with a front rim which presents a crenellated outline of shape complementary to the top end of the flange, and a rear rim, said front and rear rims extending radially inwards and defining between them an annular groove, said front rim being provided with at least one mortice, wherein said retaining ring presents on its axially outer face at least one tenon extending in an axial direction and suitable for penetrating in said notch and in said mortice, wherein the rear rim of the root of the plate and said tenon of the retaining ring carry facing annular chamfers for enabling the ring previously disposed in the recess to be compressed radially during axial sliding of the base into the recess during an initial step of mounting the plate on the disk, at the end of which step the ring is retained axially in said groove, and wherein the tenons present respective free ends of transverse width greater than the transverse width of the notches so as to retain the plate axially against the flange when the root of the plate is turned in the recess during a second step of mounting the plate on the disk.