Patent ID: 6474452
Filing Date: 2002-11-05
Classification: F16D

Abstract:
A composition brake shoe for use with railway vehicle brakes in which a useful life of said composition brake shoe is extended over that of a conventional composition brake shoe with a metallic backing plate in that significantly more of said composition brake shoe can be used before a condemning point of said composition brake shoe is reached, said brake shoe comprising:(a) a lightweight backing plate member, said backing plate member being formed from a predetermined polymeric material selected from a group consisting of unsaturated polyester, polyphenylene sulfide, glass epoxy, phenolic polymers and various combinations thereof; and (b) a preselected friction type composition material having a predetermined shape bonded to said lightweight backing plate member, said preselected friction type composition material at least includes some polymeric material selected from said group consisting of unsaturated polyester, polyphenylene sulfide, glass epoxy, phenolic polymers, at least a portion of said preselected friction type composition material includes material from recycled composition brake shoes.