Patent ID: 8893626
Filing Date: 2014-11-25
Classification: B61F

Abstract:
1. A railway car truck, comprising: first and second side frames each having a leading pedestal jaw and a trailing pedestal jaw, said first and second side frames being in opposed relationship and parallel, and the leading and trailing pedestal jaws being aligned to receive transversely mounted leading and trailing wheel sets respectively; each wheelset being received in the pedestal jaws and comprising an axle, wheels, and roller bearings; each pedestal jaw comprising leading and trailing side walls and a pedestal roof; a bearing adapter received in each pedestal jaw between the roller bearing and the pedestal roof, the bearing adapter having a curved bottom surface facing the roller bearing and a flat upper surface facing the pedestal roof; an interconnection between the bearing adapter and side frame providing a lateral spring constant less than 5000 lb/in and a longitudinal spring constant between 20,000 lb/in and 40,000 lb/in, and a restoring force in response to a load applied to the truck with a coefficient of friction or equivalent damping no more than 0.1.