US Patent 7938429 Fifth wheel coupling with inter-frame mount

An integrated cross-member mount comprises an inter-frame mount seated within opposing longitudinal channels of parallel adjacent truck frame members and comprises a top surface within each lateral portion of which is defined a longitudinally-oriented row of spaced-apart, shaped apertures, and at least two substantially vertical flanges extending downward from the lateral periphery of the top surface that are dimensioned to be conforming to the inner surfaces of truck frame members. Also included is a sliding pedestal having lateral skids seated upon respective portions of rows of spaced-apart apertures and extending into vertical gaps between the top surface of the mount and the truck frame member. Each skid includes a plurality of spaced-apart, shaped skid apertures that can align with a corresponding plurality of shaped apertures within the top surface of the mount. Each skid also includes a pawl pivotally mounted on each skid having a one or more teeth insertable through the skid apertures and the shaped apertures. The pedestal also includes a plurality of pivot bearings mating to a corresponding plurality of bearings of a fifth wheel hitch plate.