Patent ID: 6886787

Claim:
A load carrying device configured to transport a tray, the tray including a base having a bottom surface and a plurality of support members projecting below the bottom surface, the load carrying device comprising: a platform having a support surface configured to support the support members; rolling means depending from the platform; and a retainer comprising a retainer wall spaced inwardly from the perimeter of the platform and projecting above the support surface and being configured to oppose horizontal displacement of the tray when the support members are supported on the support surface, and a raised surface disposed vertically above and integrally joined by the retainer wall to the support surface; wherein the raised surface is spaced inwardly from the perimeter and the support surface is disposed between the perimeter and the retainer wall, and wherein the raised surface is configured to provide support to the base of the tray when the support members are supported on the support surface, and wherein the raised surface includes a perimeter, and a recessed channel extending adjacent the perimeter, and stiffening means comprising a plurality of ribs intersecting the channel.