| 摘要 |
The present invention relates to a balanced inflatable bladder for soccer ball, football, rugby ball, volley ball, basket ball, net ball and the like. The balanced bladder is generally elliptical or circular in shape. The balanced bladder of the present invention is made of an elastomeric material or synthetic rubber or natural rubber and comprises at least two valves of similar configuration placed diametrically opposite preferably at an angle of 180 DEG . Each valve comprises a male member and a female member where the male member of at least one valve is provided with provision for insertion of air in the form of a tapering central hole. Each valve conforms in weight shape and dimensions with each other. |
