BOLSTER OF FREIGHT CAR BOGIE Russian patent published in 2011 - IPC B61F5/00 

FIELD: transport.

SUBSTANCE: proposed bolster comprises top belt with inner vertical rib, support with flat thrust plate and thrust circular collar, bottom belt, vertical sidewalls and support column arranged between top and bottom belts. Top belt is furnished with openings and location surfaces for slides. Every slide location surface represents flat seat with slide attachment holes abutting vertical sidewall by flat inclined walls and abutting top belt by curved wall. Bolster features smooth transition of conjugation radius and that of inner vertical rib with top belt from R₂ to R₁ at a distance on both sides from vertical plane of symmetry of flat location surface for slide. Said radii are related as R₂≥2R₁ while distance whereat smooth transition of conjugation radius and that of inner vertical rib with top belt from R₂ to R₁ at the of distance 10 to 400 mm.

EFFECT: higher strength.

4 cl, 8 dwg