Inflatable ball with swingable variable internal weight

Claim 1

An inflatable ball comprising an outer inflatable chamber having a first resealable orifice, an outer skin, and a first center of volume, and an inner fillable chamber having a second resealable orifice, the second sealable orifice being in said outer skin of said outer inflatable chamber, the inner fillable chamber being substantially smaller than the outer inflatable chamber and being contained therein, the inner fillable chamber having a second center of volume displaced from said first center of volume of said outer inflatable chamber, the inner fillable chamber having a body portion and a neck portion, the neck portion extending between the body portion and the second sealable orifice and being attached to the outer inflatable chamber at said second sealable orifice, said neck portion being the only connection between said inner and outer chambers and being a hollow flexible tube for permitting said inner fillable chamber to swing back and forth within said outer inflatable chamber about said second sealable orifice when said ball is in use, said outer inflatable chamber being inflated with air, said inner fillable chamber containing a selected amount of medium much denser than air, the amount of said medium in said inner chamber being adjustable through said second orifice, whereby said ball has eccentric and unpredictable flight characteristics.