Patent ID: 8529209

Claim:
A fan rotor comprising: a disk with slots in its periphery and respective blades attached to said rotor, each blade including a blade root engaged in a corresponding slot, and each slot containing an elongate spacer interposed between the blade root and a bottom of the slot, wherein said spacer is made of an elastically deformable material, wherein at least one longitudinal segment of said spacer presents a transverse profile of arcuate shape to define two lateral zones in contact with corresponding lateral zones of the blade root and spaced apart from the bottom of the slot, and a central zone facing a corresponding central zone of the bottom of the slot, wherein said spacer presents a wave profile in its longitudinal direction, wherein said spacer presents, longitudinally, a central region only in contact with the bottom of the slot and two end regions only in contact with the blade root, wherein ends of the spacer are the highest points of said spacer in said transverse profile, and wherein, in said transverse profile, said lateral zones of said spacer are defined between a respective end of said spacer and said central zone.