Patent ID: 9695897
Date: 2017-07-04
CPC Classifications: F16D

Claim:
1. A brake disc for a vehicle, comprising: a braking surface; a wear indicator disposed in the braking surface and embodied such that an appearance of the wear indicator in a top view of the braking surface exhibits a change across a reducing level of wear; and a reference indicator disposed in the braking surface and embodied such that an appearance of the reference indicator in a top view of the braking surface does not change across the reducing level of wear or changes differently in a specified manner relative to the change in the wear indicator so that wear progression is indicated by the appearance of the wear indicator in relation to the appearance of the reference indicator, wherein the braking surface has a recess with a length that changes across the reducing level of wear and a width that remains the same across the reducing level of wear, the length being longer than the width in a new state of the brake disc, the wear indicator corresponding to the length of the recess, and the reference indicator comprises two depressions at opposing ends of the recess in the length direction.