US Patent 8061785 Hub device for disc brake, brake disc, and vehicle

A hub device for a disc brake, fastened by a fastening portion to a vehicle wheel. A number of external ridges (splines) hold the brake disc in the circumferential direction of the hub. The brake has in it a central hole with grooves running axially for cooperation with the ridges. The ridges each have a portion protruding away from the fastening portion and forming a gap between them and the outer shell surface of a portion (which points away from the fastening portion) of a bearing socket (which is supported by the fastening portion) of the hub device. The protruding portions are adapted to support a brake disc. The invention also relates to a brake disc and a vehicle having the device.