Rail road car truck and bolster therefor

专利名称：Rail road car truck and bolster therefor发明人：James W. Forbes,Jamal Hematian,Tomasz Bis申请号：US12638277申请日：20091215公开号：US08113126B2公开日：20120214

专利附图：

摘要：A rail road freight car truck has a truck bolster and a pair of side frames, thetruck bolster being mounted transversely relative to the side frames. The mountinginterface between the ends of the axles and the sideframe pedestals allows lateralrocking motion of the sideframes in the manner of a swing motion truck. The lateral

swinging motion is combined with a longitudinal self steering capability. The self steeringcapability may be obtained by use of a longitudinally oriented rocker that may tend topermit resistance to deflection that is proportional to the weight carried across theinterface. The truck may have auxiliary centering elements mounted in the pedestal seats,and those auxiliary centering elements may be made of resilient elastomeric material.The truck may also have friction dampers that have a disinclination to stick-slip behavior.The friction dampers may be provided with brake linings, or similar features, on the faceengaging the sideframe columns, on the slope face, or both. The friction dampers mayoperate to yield upward and downward friction forces that are not overly unequal. Thefriction dampers may be mounted in a four-cornered arrangement at each end of thetruck bolster. The spring groups may include sub-groups of springs of different heights.

申请人：James W. Forbes,Jamal Hematian,Tomasz Bis

地址：Campbellville CA,Burlington CA,Ancaster CA

国籍：CA,CA,CA

代理机构：Hahn Loeser & Parks LLP

代理人：Michael H. Minns

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