Abstract: A trailer hitch structure for coupling a double caster-type wheel trailer to a tow vehicle having a conventional hitch bar fixed thereto and projecting rearwardly thereof. There is provided a rigid vehicle connector having a front portion fixedly connectable to the hitch bar. The front portion connects to a transversely extending rear portion which extends generally parallel to the vehicle bumper. This rear portion mounts adjustable bumper elements adjacent the opposite ends thereof, which bumper elements adjust for snug engagement with the vehicle bumper. A crossbar is positioned adjacent but slightly rearwardly from the rear portion and is coupled thereto through a swivel structure which defines a horizontal roll axis which extends in the longitudinal direction of the vehicle. The crossbar mounts a pair of hitch balls adjacent the opposite ends thereof. The trailer has a tongue structure provided with a pair of sidewardly spaced couplers for releasable engagement with the hitch balls.

Abstract: A trailer hitch structure for coupling a single-wheel trailer to a tow vehicle having a conventional hitch bar fixed thereto and projecting rearwardly thereof. There is provided a rigid adapter having a rear portion and a front portion fixedly connected to and spaced forwardly from the rear portion. The front portion has structure for snugly and rigidly fixedly coupling the front portion to the vehicle hitch bar. The adapter also has a pair of coupling portions mounted on the rear portion in spaced relationship along a direction which extends transversely relative to the direction of vehicle movement for releasably coupling the trailer to the adapter at a pair of sidewardly spaced locations.