Abstract: A coupling device for coupling a lunette-type hitch ring to a ball-type trailer hitch is provided comprising an elongate, cylindrical post for receiving a hitch ring, the hitch ring being mounted therearound. The cylindrical post includes an axially extending aperture for receiving a trailer hitch ball. A pair of tubular members are oppositely disposed on the cylindrical post and extend radially outward therefrom. The tubular members define a radial aperture extending through the cylindrical post and a stop means for preventing axial removal of the hitch ring. A shaft extends through the radial aperture and the ball, the shaft pinning the cylindrical post to the ball. One or more tubular sleeves are concentrically mounted with the cylindrical post to vary the inside or outside diameter of the post and thereby accommodate various size balls and hitch rings. Telescoping of the sleeves and the cylindrical post also accommodates balls of varying height.

Abstract: The specification discloses a vehicular trailer hitch apparatus for converting ball-type trailer hitches to receive the hitch ring of a Lunette-eye trailer tongue. A pair of matching half cylinders are fitted around the ball member, rest on the support for the ball member, and form an inner cylinder. An outer cylinder, received on and releasably pinned to the inner cylinder, provides a receiving area for the pivotal mounting of the hitch ring. A contoured shoulder on the inside of the inner cylinder contacts the ball member to prevent removal of the cylinders from the ball member. At least one projection on the outer cylinder prevents removal of the hitch ring therefrom. Alternately, smaller hitch rings may be pivotally received around the inner cylinder with the outer cylinder secured in an inverted arrangement to retain the hitch ring on the inner cylinder.