| 摘要 |
A dual-bladder inflatable ball includes: a valve unit; an outer cover defining a confining chamber therein and connected sealingly to the valve unit; a bladder unit enclosed in the confining chamber in the outer cover, connected to the valve unit, and including an inner bladder and an outer bladder enclosing the inner bladder and disposed between the outer cover and the inner bladder. The bladder unit is operable between an inflated state, where the inner and outer bladders are spherical in shape and the inner bladder abuts against the outer bladder, and a deflated state, where the inner and outer bladders are non-spherical in shape and cooperatively define a gap therebetween. The outer bladder has a first elongation percentage, and the inner bladder has a second elongation percentage greater than the first elongation percentage of the outer bladder.
|
