Patent ID: 7255048
Filing Date: 2007-08-14
Classification: B61D,B61F

Abstract:
1. A swing motion rail road car truck, said truck having a maximum load rating, said truck comprising: a pair of first and second sideframes; a truck bolster mounted cross-wise between said sideframes; a pair of first and second spring groups, each spring group having a lateral shear constant, k wheelsets, said wheelsets having bearings mounted thereto, and bearing adapters mounted to said bearings; said truck bolster having first and second ends, each of said ends being mounted to a respective one of said sideframes on a respective one of said spring groups; said truck bolster having a range of cross-wise travel relative to said sideframes; said sideframes each having a lower region supporting one of said spring groups; said sideframes having an upper region rockingly mounted to said bearing adapters; each sideframe having a lateral deflection constant, k k said truck being free of unsprung cross-bracing.