US Patent 10207169 Connection system for punching bag top and base

A structurally unified free standing bag joined by its exterior skin to effectively absorb impact energy. The bag may comprise a foam top; a base with a rim and a channel below the rim, where the channel has a diameter smaller than a diameter of the rim; a cover, where the foam top attaches to the base via the cover; and a clamp assembly attached to the cover. The clamp assembly may have an open position and a closed position. The clamp assembly may have a diameter greater than the diameter of the rim when in the open position and smaller than the diameter of the rim when in the closed position, and the clamp assembly may be capable of being placed in the channel and secured in the closed position to attach the foam top to the base.