BOLSTER FOR RAILWAY TROLLEY AND METHOD OF MAKING BOLSTER Russian patent published in 2020 - IPC B61F5/52 

FIELD: transportation.

SUBSTANCE: group of inventions relates to railway vehicles, particularly, to three-element trolley bolsters. Bolster comprises top wall, bottom wall, front wall and rear wall. Ends of the bolster are furnished with pockets to install friction wedges. Stiffness ribs are located between the upper and lower walls in the direction from the center to the ends of the beam and equidistant from the front and rear walls. In stiffening ribs, front and rear wall there are a pair of windows for passing brake equipment and a pair of windows to reduce weight of the beam. Upper rib portions can be made larger than those of lower ribs. Thickness of lower wall may increase in direction from side walls to central rib.

EFFECT: reduced number of casting defects when making bolster.

20 cl, 3 tbl, 15 dwg