Patent ID: 6241058
Filing Date: 2001-06-05
Classification: F16D

Abstract:
A composition brake shoe for use on a railway vehicle for reconditioning a wheel tread surface of such railway vehicle during a normal braking application on such vehicle, said composition brake shoe comprising:(a) a backing plate having a stirrup portion,(b) a first friction type composition material formed into a brake shoe having a predetermined shape;(c) a brake surface for engaging a wheel tread having a predetermined configuration formed in said brake shoe and having predetermined surface area; and(d) a second friction type material formed as at least one discrete insert, having a predetermined shape and molded into said first friction type composition material, said second friction type material initially being completely embedded within said first friction type composition material, one surface of said at least one discrete insert being disposed facing said predetermined surface area of said brake surface of said composition brake shoe, said one surface of said at least one discrete insert being exposed as said first friction type composition material is eroded away due to frictional engagement with such wheel tread surface during normal braking operations, said second friction type material exhibiting greater abrasive properties than said first friction type composition material, said at least one discrete insert of said second friction material is directly bonded to said backing plate.