Patent ID: 6631791
Filing Date: 2003-10-14
Classification: F16D

Abstract:
A brake disc wear indicator, said brake disc wear indicator comprising:(a) a brake disc rotor casting, said casting having a first outer section and a axially opposed second outer section, each of said first and said second outer sections having an outer braking surface and substantially parallel inner surfaces, said outer braking surface of each of said first and said second sections for engaging a pair of opposed brake friction pads, said opposed braking surfaces being subject to substantially concave wear, and (b) a predetermined plurality of holes provided in each of substantially parallel inner surfaces of said first and said second outer sections of said brake disc rotor casting at different predetermined radial locations from a center hub of said rotor casting behind said outer braking surface of said each of said first and said second outer sections and at different predetermined depths and distances from said braking surfaces such that said holes are originally invisible by virtue of a presence of brake rotor material, but can become individually visible as said brake rotor material is successively worn away in a concave manner by braking to provide an indication of the amount and location of wear and even or uneven wear and wear patterns on the braking surfaces of the rotor.