Abstract: An attachment to prevent rotation of a hitch ball assembly where the assembly has a ball supported by a neck on a base and has a mounting shaft. The attachment comprises a plate having top and bottom surfaces and an passageway for receiving the mounting shaft. The top surface of the plate is affixed to the base of the hitch ball. The bottom surface of the plate has a anti-rotation stud. A draw bar is used having a recess for receiving the anti-rotation stud and a passageway for receiving the mounting shaft. A fastener then engages the mounting shaft to secure the assembly in position.

Abstract: An attachment to prevent rotation of a hitch ball assembly where the assembly has a ball supported by a neck on a base and has a mounting shaft. The attachment comprises a plate having top and bottom surfaces and an passageway for receiving the mounting shaft. The top surface of the plate is affixed to the base of the hitch ball. The bottom surface of the plate has a anti-rotation stud. A draw bar is used having a recess for receiving the anti-rotation stud and a passageway for receiving the mounting shaft. A fastener then engages the mounting shaft to secure the assembly in position.

Abstract: A trailer hitch safety apparatus which prevents the trailer from becoming disconnected from the towing vehicle when the trailer becomes disconnected from the primary trailer hitch. The apparatus includes a first stud, the first stud being connected to the frame trailer hitch, a hitch bar slidably received in the frame trailer hitch and selectively connected to the frame hitch by a pin extending through the hitch bar and the frame trailer hitch, the hitch bar having a ball hitch connectable thereto for receipt of the ball socket, the hitch bar having a connecting bar rigidly connected thereto for selectively connecting the hitch bar to the first stud, a second stud, the second stud being connected to the hitch bar, and a tongue member adapted for connection to the second stud and to the trailer tongue.

Abstract: A trailer hitch safety apparatus which prevents the trailer from becoming disconnected from the towing vehicle when the trailer becomes disconnected from the primary trailer hitch.

Abstract: The method of the invention includes moving a control stick to fix the boom in the desired position, and then locking the stick in the desired position so that the operator cannot move the stick. The apparatus of the invention includes a bracket connected to the cab of the crane for receipt of a control stick, and a lock for connecting the control stick to the bracket.