Composition railway brake shoe
AssigneeAMSTED Industries Incorporated
InventorAlfred G. Olsen
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Abstract
A composition railway brake shoe including a composition body having friction material dispersed therein and a binder formed essentially from rubber and a thermosetting phenolic resin attachable to a metallic back plate. A backing strip is interposed between the back plate and the body and comprises a rubber binder having dispersed therein a high strength and temperature resistant aramid fiber. The back strip and body are molded in the presence of heat to the back plate.
Claims4
An improved composition railway brake shoe including a body of friction material including a binder having rubber and a thermosetting phenolic resin in which fillers and fibers are dispersed, a metal back plate for attaching said shoe to a railway car, and a backing strip interposed between said back plate and said body of friction material wherein the improvement comprises:
- said backing strip comprising about 10-20 percent by weight of a curable rubber binder having dispersed therein a high strength and temperature resistant aramid fiber in pulp or short strand form ranging between about 0.3 to about 1.0 percent of the weight of said backing strip wherein said aramid fiber has tensile strength of 400,000 psi and temperature resistance between 420.degree.-500.degree. F.
Dependencies are inferred from the claim text.