Patent ID: 8333438

Claim:
A wheel assembly which comprises a wheel ( 2 ) having an axis (X-X′) and a system ( 4 ) for braking the wheel ( 2 ), in which a fan ( 6 ) is arranged along the axis of the wheel ( 2 ) in order to cool the braking system ( 4 ), the fan ( 6 ) comprising a rotor ( 14 ) which rotates about the axis (X-X′) and which is provided with a plurality of peripheral blades ( 22 ), the rotor ( 14 ) being arranged in an air circulation channel ( 50 ) which is delimited by an internal annular wall ( 54 ) of the wheel ( 2 ) so that an operational clearance ( 56 ) is provided between the wall ( 54 ) and the radial ends of the rotor ( 14 ), wherein the rotor ( 14 ) of the fan ( 6 ) comprises a collar ( 24 ) which connects the outer radial ends of the blades ( 22 ) together, and wherein the operational clearance ( 56 ) is provided between the internal annular wall ( 54 ) of the air circulation channel ( 50 ) and the collar ( 24 ).