Fifth wheel with rotatable bearing plate
Patent 6554310 Issued on April 29, 2003. Estimated Expiration Date: 
August 3, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 3, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2138679 3430987 3924909 Fifth wheel bearing attachment Lubrication retaining bearing H45 Fifth wheel coupling Trailer bearing plate for fifth wheel Patent #: 5066035 InventorApplicationNo. 920959 filed on 08/03/2001US Classes:280/441.1, Turntable-type fifth wheel coupling280/433, Fifth wheel only280/438.1Movably mountedExaminersPrimary: Morris, Lesley D.Assistant: Yeagley, Daniel Attorney, Agent or FirmInternational ClassB62D 053/06AbstractA fifth wheel for coupling a tractor to a trailer carrying a kingpin. The fifth wheel comprises a mounting structure adapted to be mounted to the tractor and a fifth wheel plate mounted to the mounting structure and a top bearing surface rotateable relative to the mounting structure about an axis normal to the top bearing surface in order to minimize the friction between the top bearing surface of the fifth wheel plate and the trailer. | |
