Patent attributes
In a fifth wheel hitch, a locking mechanism for retaining a trailer kingpin within a fifth wheel slot. The locking mechanism includes a jaw assembly comprised of two opposing jaw members pivotally attached at one end to the underside of the hitch plate, a longitudinally sliding cam interposed between the jaw members with a tip that contacts a bumper. The bumper is pivotally attached to tie bar that has its rear most end pivotally attached to the underside of the hitch plate. The mechanism also includes a wedge member and a secondary lock member pivotally attached thereto, where the lock member has a guide extension inserted through a guide hole in the tie bar. Rotation of the tie bar inward causes the wedge member and secondary lock to move inward until the wedge member is seated to the rear of the closed jaw assembly and the secondary lock rotates to engage a detent.
