초록 ▼

A low-level freight car for carrying trailers and containers at a low overall height combines a low center sill with relatively light side sill assemblies to provide a rigid structure having low deflection characteristics under the expected buff, draft and vertical load combinations, while keeping o

A low-level freight car for carrying trailers and containers at a low overall height combines a low center sill with relatively light side sill assemblies to provide a rigid structure having low deflection characteristics under the expected buff, draft and vertical load combinations, while keeping overall tare weight to reasonable levels and providing an adequate safety factor.

대표청구항 ▼

A low-level freight car comprising: (a) a center sill extending the full length of the car and having a depressed low-level intermediate section and opposing raised end sections having a goose-neck configuration; (b) a pair of side sill assemblies each of substantial depth and beam strength disposed

A low-level freight car comprising: (a) a center sill extending the full length of the car and having a depressed low-level intermediate section and opposing raised end sections having a goose-neck configuration; (b) a pair of side sill assemblies each of substantial depth and beam strength disposed in spaced flanking relation to said center sill; (c) a low-level floor structure including a plurality of spaced lateral members connected between said low-level depressed center sill intermediate section and lower portions of each of said side sill assemblies for supporting at least a portion of the vertical loadings produced by a load being carried by the freight car in such a manner that these vertical loadings are transmitted via said lateral members to both said center sill intermediate section and to said side sill assemblies so that these vertical loadings are shared between them; (d) end frame structures at opposing ends of the car interconnecting the center sill raised end sections to said side sill assemblies such that longitudinal buff and draft forces applied to said center sill end sections are in part transmitted to said side sill assemblies whereby such longitudinal forces are also shared between said center sill and the side sill assemblies; (e) the side sill assemblies having upper extremities which are located at a level substantially above the level of said low-level center sill intermediate section to define together with said low level floor structure and said end frame structures an elongated well for receiving cargo.