US Patent 9370976 Interchangeable hitch ball assembly

A hitch ball assembly generally includes a ball member and a body connected to the ball member. A passageway extends longitudinally within the body and at least one locking member may be in communication with the passageway to lock the hitch ball in place. An elongated member within the passageway is biased to engage the locking member. The body further includes an opening arranged transverse to the passageway. A release mechanism is positioned within an opening in the body transverse to the passageway. The release member is in communication with the elongated member to move the elongated member between a locked position and an unlocked position.