ApplicationNo. 06/354240 filed on 03/03/1982
US Classes:280/407, Adjustable connection to leading vehicle280/433, Fifth wheel only280/438.1, Movably mounted384/428Mounting or support
ExaminersPrimary: Pekar, John A.
Assistant: Fugate, D. Lynn
Attorney, Agent or Firm
International ClassesB62D 53/00 (20060101)
B62D 53/08 (20060101)
AbstractA fifth wheel assembly for coupling tractor and trailer units includes an improved trunnion bracket, comprising a pair of forged bearing caps having an inverted, U-shaped configuration, with bearing sleeves fixedly mounted therein. In sliding fifth wheel embodiments of the present invention, the bearing caps are mounted on rectangular channels fabricated from two L-shaped channel members with a flat plate attached to the upper edges of the L-shaped channels. An improved plunger is provided for adjustably connecting the trunnioned fifth wheel assembly with a base plate on which slotted racks have been mounted, and comprises a forged, two-prong construction with internal guides which minimizes structural disruption in the channels to provide greater strength. Adjustable stops are mounted on the exterior ends of the plungers, and abut the exterior sides of the racks to accurately maintain the plungers in a locked position. A manual lock release comprises an over-centered lever arm arrangement, which securely retains the plungers in the unlocked position for adjustment.