Motor vehicle with convertible bodies

Claim 1

In combination with a cargo vehicle: a substantially rectangular flat bed adapted to securely engage the chassis of the vehicle, said bed including a raised peripheral sill having a plurality of horizontally spaced, vertically disposed, threaded apertures; a rigid cargo container unit having vertical walls engaging a horizontally extending peripheral shoulder adapted to mate with the sill, the shoulder including a plurality of horizontally spaced, vertically disposed, apertures adapted to vertically align with the apertures of the sill of said bed when the container shoulder and bed sill are in mating position; and a plurality of threaded bolts receivable in the threaded apertures of said sill and operable to secure said cargo container to said bed, wherein the sill of said bed includes a substantially planar top surface and a substantially vertical interior edge and wherein the shoulder of said cargo container contains a substantially planar bottom surface and a downwardly depending interior flange operable to abut the vertical edge of the sill and an oppositely disposed, upwardly extending exterior flange operable to abut the exterior surface walls of said cargo container.