Patent ID: 9080625
Filing Date: 2015-07-14
Classification: F16D

Abstract:
1. Braking band of a disc for a ventilated disc brake, said braking band extending between an inner diameter, near to a disc rotation axis, and an outer diameter, far from said disc rotation axis, said braking band comprising two plates mutually facing and defining an interspace, said plates being mutually linked by heat dissipation and connecting means, at least some of said heat dissipation and connecting means being shaped as columns projecting from a plate towards the opposite plate in the form of pillars, said pillars being grouped in at least one circumferentially arranged rank, at least some of said pillars of said at least one rank having, in a plane substantially parallel to an air flow along ventilation ducts, a substantially rhombus shaped section with four convex vertexes joined by four concave sides to form a star shape, wherein the four concave sides and four vertexes are mutually joined and entirely formed by curved lines in an arc shape such that at least one of the vertexes is disposed between two of the concave sides and includes a first radius between 1 mm and 4 mm, and each of the concave sides includes at least one portion in the form of an arc of a circle, having a second radius between 5 mm and 20 mm, wherein said pillars are grouped in at least three ranks comprising at least one outer rank, an inner rank near the disc axis, and an intermediate rank with pillars having the star-shaped section configured to improve a thermal exchange efficiency and to avoid the inlet of stones or debris in the air flow, wherein the star-shaped section is further configured to induce turbulent conditions.