| 摘要 |
An inflatable ball which includes a ball skin having a ball opening, a valve ring which is secured to the ball opening, and a valve assembly insertable through the valve ring into the ball. The valve assembly incudes a valve stem slidably movable between first and second positions to block and expose the valve opening to the outside of the ball. A method of forming the ball by assembling an inflatable device which has an opening, a valve assembly and a preformed valve ring is also disclosed. The method includes the steps of inflating the inflatable device, securing the valve ring around the opening of the inflatable device while inflated, deflating the device when the valve ring is secured thereto, and attaching the valve assembly to the valve ring.
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