Ball for e.g. playing by children with dog, has flexible material whose outer surface has cavities to arrange gripping points for dog teeth, where points are regularly distributed in sufficient number to allow regular ball rolling

摘要

The ball has a flexible material (1) with elastic property and good resistance to perforation. An outer surface of the material is cut out with cavities (2) to arrange gripping points (3) for the teeth of a dog. The points are regularly distributed at equidistant from the center (4) of the ball and in sufficient number so as to allow a regular rolling of the ball. The cavities are reinforced by a texture (10).