Patent ID: 8602181
Filing Date: 2013-12-10
Classification: B61H,Y10T

Abstract:
1. A method of manufacturing a railroad freight car brake beam strut assembly, comprising the steps of: providing a railroad freight car brake beam strut having a longitudinal axis and an axially elongated slot extending generally parallel to said longitudinal axis and defined between first and second sides of said strut, with each side of said strut defining a bore opening to a center and to an exterior of said strut, with the bores defined by said strut being aligned relative to each other along an axis extending generally perpendicular to said longitudinal axis; and pressing a one-piece metal brake pin bushing into each bore of said strut in a direction extending away from the longitudinal axis of said strut, with each brake pin bushing having inner and outer ends disposed at different distances from the longitudinal axis of said strut, a bore defined by and opening to said inner and outer ends of each bushing, and wherein an outer surface of each bushing has a frusto-conical configuration extending between the inner and outer ends of each bushing, with the outer end of the frusto-conical outer surface configuration on each bushing having a diameter smaller than an inner diameter defined by a closed margin of the respective bore in said strut, and with the inner end of the frusto-conical outer surface configuration on each bushing having an outer diameter larger than the inner diameter defined by the closed margin of the respective bore in said strut such that each brake pin bushing is inhibited from axially separating from said strut.