Trailer fifth wheel-gooseneck conversion adapter

Fifth wheel adapter apparatus for towing a ball hitch trailer behind a truck with a fifth wheel hitch comprising

• a vertical column member with means for fixedly securing said vertical column member at its lower end to a ball hitch trailer tongue,
• a removable vertically adjustable gooseneck mounting element on said mounted vertical column member at its upper end,
• a gooseneck having a fifth wheel kingpin at one end for pivotal engagement with a fifth wheel hitch mounted on a truck bed secured in a removable longitudinally horizontally adjustable manner to said mounting element,
• means for locking said gooseneck mounting element, and
• coupling means comprising horizontal arm means extending backward from said vertical column member and having means for clamping said arm means to the underside of a conventional trailer tongue and a ball for mating with the hitch of the trailer.

Fifth wheel adapter apparatus for towing a ball hitch trailer behind a truck with a fifth wheel hitch comprising

• a vertical column member with means for fixedly securing said vertical column member at its lower end to a ball hitch trailer tongue,
• a removable vertically adjustable gooseneck mounting element on said mounted vertical column member at its upper end,
• a gooseneck having a fifth wheel kingpin means for pivotal engagement with a fifth wheel hitch mounted on a truck bed secured in a removably longitudinally horizontally adjustable manner to said mounting element, and
• means for locking said gooseneck mounting element to said column member comprising at least a pair of holes in said gooseneck mounting element and at least a pair of holes in said vertical column member, the holes of said pairs of holes being equally separated, and a generally U-shaped double pin element for insertion through the holes and in said mounting element in said vertical column member.

Fifth wheel adapter apparatus for towing a hitch trailer behind a truck having a fifth wheel hitch comprising

• a pair of vertical column members of rectangular cross-section secured together in spaced relation at their lower ends,
• coupling means for rigidly mounting said column members on the tongue of said trailer including a ball for mating with the hitch of said trailer and two horizontal arms extending backward from said lower ends of said column members and having means for clamping each of said arms to the underside of a conventional V-shaped trailer tongue,
• a vertically adjustable gooseneck mounting element mounted in vertical sliding engagement with said vertical column members at its upper end, said adjustable gooseneck mounting element having an elongated hollow vertical portion the interior cross-section of which is of rectangular shape matching the exterior rectangular shape of said column members,
• a gooseneck comprising a horizontal extension of rectangular cross-section shaped to fit in an opening in said mounting element and a downward, angularly extending front portion having said kingpin secured extending downwardly therefrom, said gooseneck being shaped to slidably engage said opening in said mounting element with relative motion therebetween constrained to a horizontal fore and aft direction,
• means for locking said mounting element in a selected position relative to said vertical column members, comprising at least a pair of holes in said mounting element and at least a pair of holes in one of said vertical column members, the holes of said pairs of holes being equally separated, and a generally U-shaped double pin element for insertion through the holes in said mounting element and in said vertical column members, and
• means for locking said gooseneck in a selected position relative to said mounting element.