Rail road freight car with damped suspension
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United States of America Patent
Stats
-
Jul 8, 2014
Grant Date -
Apr 22, 2010
app pub date -
Aug 10, 2009
filing date -
Aug 10, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An auto rack rail road freight car is provided for carrying low density, relatively high value, relatively fragile lading. The car has trucks that have multiple dampers in a four corner arrangement in the sideframes. The dampers may include damper wedges having primary and secondary wedge angles. The spring groups in the side frames are relatively soft, giving a low vertical bounce natural frequency. In an articulated embodiment, differentially placed ballast is mounted in a biased arrangement to load the coupler end trucks to encourage a dynamic response similar to the dynamic response of the internal trucks.
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