Title: Less abrasive composition railroad brake shoe material

Abstract: Low abrasion, high strength friction materials are described, containing rubber binder, inorganic filler, fiber, and not more than 1% by volume of lead and lead oxide. Organic fillers and phenolic resins may also be present. The materials find particular use as brake shoes for railroad rolling stock which uses wheels of relatively soft steel.

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Inventors: Adelmann, John Charles (Littleton, CO, US)

Application Number: 575306
Filing Date: 1975-05-07
Publication_date: 1976-05-25
Assignee: Johns-Manville Corporation (Denver, CO)
Primary Class(es): 523/158 51/298, 51/299, 106/36, 188/251A, 260/998.13, 524/14, 524/511, 525/133, 525/139, 525/141
Other Classes:
US Patent Ref:

2052779	Sep, 1936	Lidkea et al.	106/36.
3344094	Sep, 1967	DE Gaugue	188/251.
3673276	Jun, 1972	Keller	188/251.
3684062	Aug, 1972	Johnson	188/251.

Other Refs: 561,962

Aug, 1958	CA

Primary Examiner: Czaja, Donald E.
Assistant Examiner: Fletcher, H. H.
Attorney: Krone; Robert M., Kelly; Joseph J., McClain; James W.