John R Spence

US Patent:

46305475, Dec 23, 1986

Filed:

Apr 5, 1984

Appl. No.:

6/597028

Inventors:

Phillip G. Przybylinski - Schererville IN
John H. Spence - Munster IN

Assignee:

Pullman Standard Inc. - Chicago IL

International Classification:

B61D 1700

US Classification:

105416

Abstract:

A railway car underframe includes a center sill having a central section and opposite end sections. The sill includes spaced vertical walls, and upper and lower walls which are slotted in registry the length of the central section, and which form in cross section a spaced I-beam construction. The construction provides a sill having high torsional flexibility which is necessary to accommodate the railway car to track conditions tending to derail the car when single axle suspensions with two wheels are utilized. The sill also includes a separator in the form of a channel which includes flanges at its sides which are secured to the vertical walls of the sill. The separator extends substantially the length of the slots and is effective to resist lateral forces tending to buckle or permanently deform the sill during operation, while not adversely affecting the high torsional flexibility which is required in the sill structure. The railway car further includes a cargo or load bearer construction having cantilevered cross bearer members which include vertical webs with upper and lower flanges projecting outwardly from the sill. The cross bearers engaged with the central portion of the sill are interconnected by straps extending through the sill.