It was filed in January 2006, and granted in August 2008.
I'd somehow thought the cooler was refrigerated, running off the engine. But it isn't; it's just a cooler:
The transport kart provides advantages and benefits over the prior art through use of a most unique type of body element (20), comprising of, or substantially resembling, a common ice-chest or common cooler. The body element can be selected of sufficient size and shape to also carry additional passengers, plus can be configured to carry ice and refreshments.