Patent ID: 7097010

Claim:
A brake disc for a vehicle disc brake, comprising: a radially inner hub portion ( 1 a ) intended to be non-rotatably joined to a wheel hub; a radially outer disc portion ( 4 ) that surrounds the hub portion and that has opposing frictional surfaces ( 5 ); and passages ( 8 , 9 ) formed in the outer disc portion, said passages being arranged to conduct cooling air in the disc material between the frictional surfaces, all of the passages ( 8 , 9 ) having inlets ( 10 ) and outlets ( 11 ) for cooling air at or in the vicinity of an outer periphery of the radially outer disc portion and are formed so that, as the disc ( 1 ) rotates in at least one direction, a partial vacuum is generated at the outlet so that the surrounding air flows in through the inlet and out through the outlet for cooling of the radially outer disc portion, wherein the outer disc portion is formed of two disc elements ( 4 ) that are separated by spacer elements ( 7 a – 7 g ), which delimit said passages ( 8 , 9 ) and of which at least some ( 7 a , 7 b ) are arcuate fingers, and wherein the two disc elements and the hub portion are cast in one piece with an outer periphery of the hub portion adjoining an inner periphery of the two disc elements.