Handbrake operating linkage for multi-unit rail cars
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United States of America Patent
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-
Mar 6, 1990
Issued Date -
N/A
app pub date -
Jan 25, 1989
filing date -
Dec 15, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved single manual brake operating system for connecting the brake equipment of a plurality of wheeled railroad freight car trucks. The system provides for initial rapid takeup of slack in the linkages interconnecting the braking mechanisms for several trucks and thereafter supplies force with a greater mechanical advantage as the brake shoes are forced against the wheels of the railway car. This variably applied take-up force is accomplished using a system of noncircular sheaves to which flexible portions of the handbrake operating linkage are attached in such a manner that initial rotation of the take-up sheave provides a relatively long effective lever arm to take up slack in the interconnecting linkages, and thereafter provides a shorter effective lever arm for application of tension through the interconnecting linkages.
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