Patent ID: 7748172

Claim:
An insulated floor system for a cargo container comprising: a bottom skin having a longitudinal axis and a top surface having a first end and a second end opposite said first end; a first side channel having a top surface and a bottom surface, wherein the bottom surface of the first side channel is attached to the top surface of the bottom skin at the first end and wherein the first side channel is aligned with the longitudinal axis of the bottom skin; a second side channel having a top surface and a bottom surface, wherein the bottom surface of the second side channel is attached to the top surface of the bottom skin at the second end and wherein the second side channel is aligned with the longitudinal axis of the bottom skin; at least one structural tube having a top and bottom surface, wherein the bottom surface of the structural tube is attached to the top surface of the bottom skin, and wherein the structural tube extends from the first side channel to the second channel and is aligned perpendicular with the longitudinal axis of the bottom skin; at least one vacuum insulated panel having a top and bottom surface and having its bottom surface attached to the top surface of the bottom skin, wherein the vacuum insulated panel comprises: an evacuated porous insulating material; and an air impermeable layer encapsulating the porous insulating material; a top skin having a top and bottom surface, wherein the bottom surface of the top skin is attached to the top surfaces of the at least one vacuum insulated panel, the at least one structural tube, and the first and second side channels, and wherein the top skin and bottom skin form a closed structure surrounding the at least one vacuum insulated panel; a support layer having a top and bottom surface and having its bottom surface attached to the top surface of the top skin; and a tread plate sheet having a bottom surface and having its bottom surface attached to the top surface of the support layer.