Patent ID: 7097006

Claim:
A braking band for a disc-brake disc configured to rotate about a rotation axis, the braking band comprising: opposed annular braking surfaces which each extend from an inner edge facing towards the axis of rotation, to an outer edge facing towards an outside of the disc, at least one of the annular braking surfaces including a uniform distribution of grooves on at least one of the braking surfaces, the distribution of grooves having a module pattern which is repeated circumferentially, each of the grooves being closed and extending along a predominant line of extent defining an axis of said groove, and no groove intersecting other grooves, the module extending from an inner radius to an outer radius of the annular portion of the braking surface and including: a first groove extending without interruption substantially from the inner radius to the outer radius, a second groove shorter than the first groove, and a third groove shorter than the first groove, wherein the axis of the second groove and the axis of the third groove are inclined opposite to an inclination of the axis of the first groove, relative to a radial direction of the braking band, the second groove and the third groove of the module extending, taken together, in a radial direction for a distance substantially equal to a radial extent of the first groove of the module, and wherein the module extends radially a distance less than a width of the respective braking surface upon which it is situated.