Composition friction element for a railroad brake shoe
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United States of America Patent
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-
Feb 2, 1982
Grant Date -
N/A
app pub date -
May 19, 1980
filing date -
May 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A railroad brake shoe may include a friction element made by combining a number of materials so as to produce the required frictional characteristics for railroad braking. Heretofore, such friction elements commonly contained materials such as lead and asbestos. These two elements may have toxic characteristics under certain circumstances and therefore are suspect. To safely handle these suspect materials has thus become most difficult and expensive. By this invention, a composition friction element, which meets the requirements of the railroad industry, includes a substantially reduced suspect material content, yet is competitive in performance and cost with other known products.
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