Patent ID: 7204397

Claim:
A cargo container removably mounted to a tractor, said container comprised of a bottom member adjacent to and coupled with three generally vertical sidewall members, two of the vertical sidewall members having upper rear corners and laterally extending ledges, a fourth sidewall member having lateral upper edges and a lower edge portion, a lug element and a lug receiving opening in the fourth sidewall member and the bottom member, and pivot structures between the lateral upper edges of the fourth sidewall member and the upper rear corners of two of the sidewall members to permit the fourth sidewall member to be swingably moved between a first position wherein it serves as a fourth generally vertical sidewall member to provide with the bottom member and three sidewall members a cargo storage area and a second position wherein it is generally horizontal and serves as a material supporting surface supported by the ledges; the lug element is received in the lug receiving opening in the first position and the lug element is out of the lug receiving opening in the second position.