Patent ID: 7571684

Claim:
A set of dampers for one end of a bolster of a railroad car truck, each such bolster having a complement of two such sets of dampers, the bolster being for mounting crosswise between first and second sideframes of the railroad car truck, wherein said set of dampers includes a first damper wedge, a second damper wedge, a third damper wedge, and a fourth damper wedge, each of said damper wedges having: a first face for sliding engagement of a wear plate of a sideframe column; a second face for engagement with a sloped face of a bolster pocket; a third face defining a seat for a spring, said seat being of a size corresponding to a full coil spring; a side face; said first face, said seat, and said side face being square to each other; said second face being sloped to correspond to the sloped face of the bolster pocket; said side face and said second face meeting along a vertex; said sloped face being angled to said first face and having a primary angle, alpha, with respect thereto, alpha being measured in the plane of said side face from vertical to the vertex between said side face and said sloped face, alpha being greater than 35 degrees; said sloped face being angled cross-wise at a rake angle, beta; and said first and fourth damper wedges having left-handed rake angles, and said second and third damper wedges having right handed rake angles.