Chock block for vehicles

Claim 1

A CHOCK BLOCK FOR USE WITH WHEELS OF VEHICLES TO PREVENT UNDESIRED ROLLING OF THE VEHICLE, WHICH COMPRISES: (A) A GENERALLY WEDGE SHAPED, HOLLOW, STRONG RIGID SHELL OF ABOUT THE WIDTH OF A VEHICLE WHEEL PERIPHERY, WITH A GENERALLY FLAT BOTTOM FACE FORMING ONE FACE OF A WEDGE, AND A WALL THAT FORMS THE OTHER FACE OF SUCH WEDGE, EXTENDING UPWARDLY FROM SAID BOTTOM WALL AT THE WEDGE EDGE, WITH ITS UPPER, OUTER FACE CORRESPONDING GENERALLY IN CURVATURE AND SIZE TO A SEGMENT OF A CYLINDER THAT WOULD GENERALLY FIT AGAINST A PERIPHERAL SEGMENT OF A SELECTED VEHICLE WHEEL AGAINST WHICH IT IS INTENDED TO BE WEDGED IN USE, (B) THE UPSTANDING WALL OF SAID SHELL OPPOSITE FROM AND GENERALLY PARALLEL TO SAID WEDGE EDGE TERMINATING AT ITS LOWER EDGE IN ONE SET OF TEETH SPACED APART IN A ROW ALONG ITS SAID LOWER EDGE AND DEPENDING TO A SUBSTANTIALLY DISTANCE BELOW SAID BOTTOM FACE, (C) SAID SHELL ALSO HAVING ANOTHER SET OF TEETH ARRANGED IN A ROW ALONG SAID WEDGE EDGE AND SPACED APART IN SUCH ROW, AND DEPENDING ALSO BELOW SAID BOTTOM FACE, (D) THE WALL OF SAID SHELL WHICH HAS THE ARCUATE WEDGE FACE BEING PROVIDED ON ITS INNER SURFACE WITH A PLURALITY OF REINFORCING RIBS FROM ADJACENT THE TOP OF THE SHELL TO AND BELOW THE SAID BOTTOM FACE OF THE SHELL AND THERE EACH ALIGNED WITH AND MERGING INTO ONE OF THE DEPENDING TEETH OF SAID ANOTHER SET ALONG SAID WEDGE EDGE.