Patent ID: 8303246

Claim:
An arrangement comprising a circular ferrule, substantially radial arms joining the ferrule to another concentric ferrule, and connections of the arms to the ferrule, the connections comprise wings protruding from two opposite sides of the arm, keys comprising protruding wings, drillings of the ferrule and drillings of the keys, and bolts passing through alignments, each comprising one of the drillings of the ferrule and one of the drillings of the keys, and retaining the keys against the ferrule, the wings protruding from the arm being respectively retained between the wings of the keys and the ferrule, wherein the arrangement comprises alignments of other drillings of the ferrule and drillings of the arm, these alignments being occupied by centring pins, the ferrule is cone-shaped and comprises bosses, said bosses being either flat or cylindrical, wherein the keys face the bosses, and the arms are surrounded with fairings.