B - Operations – Transporting – 61 – H
Patent
B - Operations, Transporting
61
H
B61H 9/00 (2006.01) B61H 1/00 (2006.01) F16D 65/00 (2006.01) F16D 65/04 (2006.01) F16D 65/06 (2006.01) F16D 69/00 (2006.01)
Patent
CA 2313727
A composition brake shoe for use on a railway vehicle for reconditioning a wheel tread surface during a normal braking application on such railway vehicle is provided. The composition brake shoe includes a backing plate having a stirrup and a brake surface having a predetermined configuration and a predetermined surface area. It further includes a first friction type composition material extending over the surface area of such brake surface of such composition brake shoe. The composition brake shoe further contains a second friction type material, formed as at least one discrete insert, having a predetermined shape and molded into such first friction type composition material. Such second friction type material initially being completely embedded within such first friction type composition material. One surface of such at least one discrete insert being incrementally exposed as such first friction type composition material is eroded away due to frictional engagement with such wheel tread surface during normal braking operations, such second friction type material exhibiting greater abrasive properties than such first friction type composition material. Such at least one discrete insert of such second friction type material is bonded to such backing plate.
Kahr Joseph C.
Shute Bruce W.
Macrae & Co.
Westinghouse Air Brake Company
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