Railway car roll stabilizing bogie

Claim 1

A suspension system for supporting at least a portion of a vehicle body on a bogie, comprising: a lower frame including side frames supported on wheel axles of the bogie and a transom extending from one side frame to the other and rigidly connected to said side frames, a bolster located above the lower frame and a vehicle body mounted on the bolster first mechanical connection means for interconnecting said bolster and said lower frame, said first mechanicl connection means comprising an articulated system pivotally connected to the lower frame and the bolster, the instantaneous center of rotation of which articulated system is situated at a higher level than the level of the center of gravity of the body, such that tilting movement from an upright position of said bolster relative to said lower frame transversely of the vehicle frame lowers the center of gravity of the vehicle body, first resilient means interconnecting said lower frame and said bolster for exerting on said bolster a resilient restoring force opposing instability of the body due to lowering of the center of gravity of the body during tilting movement of the body around said center of rotation away fram a vertical line through the center of the lower frame, a second mechanical connection between said bolster and said body including means for limiting movement between said bolster and said body to relative vertical displacement and relative rotation about a substantially vertical axis, and a second resilient means interconnecting the bolster and the body for resiliently transmitting weight loads between the body and the bolster.