Patent ID: 7770981

Claim:
A vehicle comprising: a frame structure; a dump bed; a ball joint assembly coupling the dump bed to the frame structure, the ball joint assembly comprising a ball and a receiver, the ball defining first and second grooves and comprising an external surface, the receiver comprising an internal surface, a portion of the internal surface of the receiver engaging a portion of the external surface of the ball, one of the ball and the receiver being attached to the frame structure, and the other of the ball and the receiver being attached to the dump bed; a first retaining element moveably coupled with the receiver and configured to selectively engage the first groove in the ball; a second retaining element moveably coupled with the receiver and configured to selectively engage the second groove in the ball; and an actuator coupled with each of the first and second retaining elements and configured to facilitate selective engagement of the first groove by the first retaining element and the second groove by the second retaining element.