US Patent 7036637 Tire chocking apparatus

A tire chocking apparatus consisting of first and second tire chocks, a spreader jack interconnecting the first and second tire chocks; a handle fixedly attached to or formed wholly with the spreader jack, the handle extending upwardly from the spreader jack, the handle having an upper end; a reciprocatable member mounted moveably upon the handle's upper end; and a drive linkage interconnecting the reciprocatable member and the spreader jack.