Patent ID: 7150070

Claim:
A hubless caster assembly, including: a body frame comprised of a generally planar member having a large diameter central bore extending therethrough, and a rod portion extending integrally and within the plane of said planar member, a pair of centering rings, each having an neck portion and a flange annular portion extending from an outer annular edge of said neck portion; each neck portion of said centering rings being secured in a respective end of said large diameter central bore of said body frame; a pair of toroidal wheels, each having an inner annular surface extending concentrically about the neck portion of a respective centering ring and spaced apart therefrom; a pair of bearing races, each formed in a respective one of said inner annular surfaces of said wheels; and, a plurality of bearings disposed in said bearing races and engaged in rolling contact with each of said neck portions and the respective inner annular surface to support said wheels in independent, freely rotating fashion about said central bore.