Ball for sporting purposes esp. football with ball casing and pressure valve

摘要

The ball has a pressure measuring unit (13,13a) at the inner wall of the ball is arranged pref. at the place lying diametrically opposite the valve. The pressure measuring unit has the same or essentially the same mass, and pref. the same or a similar geometry as the valve. The pressure measuring unit is connected with an inner wall of the ball, directly exposed to the air pressure. A flexible bladder (11) lying inside the ball casing (10) accepts the air filling and has the valve for this. The pressure measuring unit is arranged at the inner wall of the bladder and is connected fixed with this.