Patent ID: 7174837

Claim:
A railway car truck with a railway car thereon having a gross weight on rail rating of at least 286,000 pounds, comprising: two sideframes, each sideframe having a pedestal formed on opposite ends thereof and substantially upright columns defining a sideframe opening intermediate the pedestals, friction surfaces being provided on the upright columns, each pedestal having a pedestal opening sized to receive a bearing adapter; a bolster transversely situated relative to the sideframes and supported within the sideframe openings, the bolster including side bearing pads on an upper surface of the bolster between the sideframes; a truck suspension consisting of a spring group provided in each sideframe opening that supports respective ends of the bolster, the spring group having a minimum reserve capacity of less than 1.5; and at least one of the following: long travel side bearings provided on each side bearing pad, the long travel side bearings including a base, a cap, and at least one resilient urging element having a travel of at least ⅝″ before the urging element is fully compressed or the base and cap bottom out; high squareness friction shoes disposed between the bolster and the sideframe openings, each friction shoe including a substantially vertical wall engageable with the friction surface on the upright columns and a friction face; and an elastomeric pad disposed on a roof of the pedestal opening so as to be disposed between the pedestal and the bearing adapter in use.