Caster adapter or wheel assembly for mobile wheel base

In combination, a stem caster, a platform or container having a bottom with an opening of a given size and shape, and an adapter for use in attaching said stem caster to the bottom of said platform or container to form a mobile wheel base, said adapter comprising a body having a top surface and a bottom surface, a substantially cylindrical recess within said body open at said bottom surface, said recess being adapted to receive and engage the stem of said caster, and a cylindrical member extending from said top surface of said body and comprising a side wall and first and second protrusions radially extending from said side wall in opposite directions, such that said member and protrusions are the size and shape of the platform or container opening and adapted to be received within said platform or container opening and turned relative to said platform or container so as engage the bottom of said platform or container.

A wheel assembly for a platform or container having a bottom with an opening of a given size and shape, said assembly comprising a body having a top surface and a bottom surface, said body comprising first and second spaced brackets extending from said bottom surface of said body, a wheel or roller rotatably mounted between said brackets, and a cylindrical member extending from said top surface of said body, said member comprising a side wall and first and second protrusions radially extending from said side wall in opposite directions, said member and protrusions being the size and shape of the platform or container opening and adapted to be received within the platform or container opening so as engage the bottom of the platform or container.

In combination, a wheel or roller, a platform or container having a bottom with an opening of a given size and shape, and an assembly for attaching said wheel or roller to said bottom of the platform or container to form a mobile wheel base, said assembly comprising a body having a top surface and a bottom surface, first and second spaced brackets extending from said bottom surface of said body, said wheel or roller being rotatably mounted between said brackets, and a cylindrical member extending from said top surface of said body, said member comprising side wall and first and second protrusions radially extending from said side wall in op site directions, said member and protrusions being the size and shape of the platform or container opening and adapted to be received in said platform or container opening and turned relative to said platform or container so as engage said bottom of said platform or container.