Patent ID: 6347588
Filing Date: 2002-02-19
Classification: B61F,F16F

Abstract:
A mount in a railway truck for providing support between a frame and an axle, comprising:a top plate having a first top surface for receiving loads and a first bottom surface, the first bottom surface having at least four sections each at an angle between a horizontal plane and a vertical plane, and at least two of the at least four sections being oriented in a different plane from the other two; a bottom plate having a second bottom surface for carrying loads and a second top surface, the second top surface having at least four sections corresponding to and parallel with the at least four sections of the first bottom surface; an intermediate plate spaced between the top plate and the bottom plate and defining a first space between the intermediate plate and the top plate and a second space between the intermediate plate and the bottom plate, the intermediate plate having at least four sections corresponding to and parallel with the at least four sections of the first bottom surface and the second top surface; an elastic material in both the first space and the second space thereby forming first and second elastic material layers; the arrangement of the first elastic material layer, the second elastic material layer and the rigid material layer being such that they abut against each other in cooperation to result in a lateral horizontal spring rate greater than a longitudinal horizontal spring rate; and a bulge area of the mount, defined as the vertical area in which the first elastic layer and the second elastic layer are free to horizontally expand, is greater than the combined perimeter vertical area of the first and second layers, defined as the vertical thickness of each layer multiplied by the perimeter length of each layer.