US Patent 11365005 Caster assembly for cargo handling system

A caster roller assembly may comprise a base, a roller rotationally coupled to the base, and a thrust bearing assembly adjacent to an underside surface of the base. The thrust bearing assembly may include a bearing cup, a plurality of thrust rollers located in a channel defined by the bearing cup, and a top plate located between plurality of thrust rollers and the base. An inner circumferential surface of the top plate may define an opening configured to receive a protrusion extending from the underside surface of the base.