Patent ID: 7305923
Filing Date: 2007-12-11
Classification: B60P,B61D,Y02T

Abstract:
1. An insulated boxcar comprising: a pair of sidewall assemblies mounted on a railway car underframe; each sidewall assembly having an interior surface formed by sheets of composite material and an exterior surface formed by metal sheets; insulating material disposed between and bonded with the sheets of composite material and the metal sheets; each sidewall assembly having a plurality of support posts; each support post having a first end and a second end; the first end of each support post attached to a respective side sill assembly; the first end of each support post having a swedged portion to accommodate attachment with the respective side sill assembly; each support post having a first surface and a second surface; the metal sheets attached to respective second surfaces of the support posts; nonmetallic isolators attached to respective first surfaces of the support posts opposite from the attached metal sheets; the sheets of composite material attached with the nonmetallic isolators; the swedged portions of the support posts cooperating with the respective side sill assembly to allow exterior dimensions of the box structure to satisfy clearance requirements based on a nominal length of sixty feet for the insulated boxcar; interior dimensions of the boxcar, inside width approximately nine feet six inches and inside height at center line twelve feet ten and one half inches corresponding approximately with interior dimensions of an uninsulated boxcar having the same nominal length of sixty feet and exterior extreme height up to sixteen feet eleven and seven eighths inches and an extreme width of approximately ten feet six and five eighths inches; and the insulated boxcar having a UA factor rating less than 300 BTU/° F./hour.