Patent ID: 6119820
Filing Date: 2000-09-19
Classification: F16D

Abstract:
A disc brake rotor arranged to rotate with a member and providing two oppositely-facing annular friction surfaces which, in the operation of the brake, are engaged by blocks of friction material to decelerate the rotor and hence the member, the rotor comprising a first portion which provides one of said annular surfaces, and a second portion which provides the other of said annular surfaces, said first and second portions arranged in spaced parallel relationship and being joined by vanes between which are defined cooling ducts extending radially outwardly of the rotor, the ducts being arranged so that, as the rotor is rotated, air passes through the ducts and acts to cool the rotor, wherein the transverse cross-sectional area of each duct decreases progressively between an inlet to the duct and an intermediate region thereof and increases between said intermediate region and an outlet of the duct, the surfaces of the portions which bound the ducts extending as convex curves between inlets of the ducts and outlets thereof.