Patent ID: 7267210
Filing Date: 2007-09-11
Classification: F16D

Abstract:
1. A braking band for a disc-brake disc, comprising: a first plate and a second plate, said plates arranged face to face so as to form a space, a plurality of spacer elements which connect the first plate and the second plate, the plurality of spacer elements being constituted by a module of spacer elements which is repeated at predetermined intervals around a circle coaxial with the braking band so as to form a plurality of repeated modules and a plurality of ventilation ducts distributed uniformly around the space between the two plates, each module of spacer elements comprising a first fin, the first fin connecting the first plate to the second plate and having an elongated shape that defines a first internal line, said internal line of each said first fin extending along a particular one of a plurality of first arcuate lines which are not tangent to the braking band, and said each module of spacer elements further comprising a second fin, a third fin, and a fourth fin, the second, third and fourth fins connecting the first plate to the second plate and each having an elongated shape that defines a second, third, and fourth internal line respectively, said second internal line of each said second fin extending along a particular one of a plurality of second arcuate lines which are not tangent to the braking band, said second arcuate line also extending along the third internal line for said third fin and along the fourth internal line for said fourth fin, wherein said each module of spacer elements are repeated at said predetermined intervals around a circle coaxial with the braking band so as to form said plurality of modules thereby providing said band with a plurality of said first fins, said second fins, said third fins and said fourth fins, in which each said first, each said second, each said third and each said fourth fins belongs to a particular module of said plurality of modules, wherein each first fin of said plurality of first fins defines said first internal line extending along a particular one of said plurality of first arcuate lines, each first arcuate line being repeated at said predetermined intervals so as to form said plurality of first arcuate lines, wherein each second, third and fourth fin of said plurality of second, third and fourth fins defines respectively said second, third and fourth internal line, said second internal line of each second fin extending along a particular one of said plurality of second arcuate lines, said second arcuate line also extending along the third internal line for a third fin belonging to the same module and along the fourth internal line for a fourth fin belonging to the same module, wherein each second arcuate line is repeated at said predetermined intervals so as to form said plurality of second arcuate lines, each second arcuate line being alternated to a first arcuate line around a circle coaxial with the braking band and offset relative to the adjacent first arcuate line by a distance equal to half of the predetermined intervals at which the first arcuate lines are repeated, and wherein said plurality of spacer elements consists of said first fins, second fins, third fins and fourth fins whereby each spacer element of said plurality of spacer elements belongs to one particular module of said plurality of modules.