Elastic play ball with internal pressure chamber - has irregular wall thickness in order to produce unpredictable bounce

摘要

An elastic play ball has one or several internal chambers (13) which are pressurized by compressed air. The wall thickness of the ball is irregular and the density of the elastic material on the inside of the wall (14, 15) is not the same for each wall section. Thus, when the ball is thrown against a firm surface, the path of its rebound is unpredictable. Since the rebound of the ball cannot be controlled, no playing partner is required when this type of ball is used. An air valve (5) is provided so that the pressure can be altered in order to change the bouncing pattern of the ball.