Rail road freight car with damped suspension
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United States of America Patent
Stats
-
Sep 11, 2007
Grant Date -
Sep 29, 2005
app pub date -
May 10, 2005
filing date -
Aug 1, 2001
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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