Selectively Rigid Or Flexible Patents (Class 280/474)
  • Trailer coupling means
    Patent number: 3994510
    Abstract: The disclosure relates to a means of coupling a trailer to an automobile comprising a self-aligning and shock-absorbing coupling means. The coupling means uses a fifth wheel and spring-loaded roller-detent means to maintain alignment in yaw between the vehicle and the trailer. A speed-responsive means reduces the "stiffness" in yaw between the automobile and the trailer when the vehicle speed is below a predetermined value.
    Type: Grant
    Filed: July 17, 1974
    Date of Patent: November 30, 1976
    Inventor: Durrell U. Howard