Patents by Inventor Stephen A. Kingman

Stephen A. Kingman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Transport lock for lift bed trailer
    Patent number: 4061353
    Abstract: A lift bed highway trailer adapted to be coupled to a tractor to transport heavy loads through use of pallet frame units that can be quickly picked up and discharged at any point, including an improved power actuated mechanism in the trailer gooseneck structure and in the suspension subframe for positively locking the liftable bed in the raised transport position.
    Type: Grant
    Filed: January 20, 1976
    Date of Patent: December 6, 1977
    Assignee: Eugene A. LeBoeuf
    Inventors: Stephen A. Kingman, Leslie A. Weaver
  • Lift bed trailer suspension subframe
    Patent number: 4060145
    Abstract: A lift bed highway trailer having a wheeled suspension and adapted to be coupled to a tractor to transport heavy loads through use of pallet frame units that can be quickly picked up and discharged at any point, including a suspension subframe with guide means for maintaining the suspension in alignment with the main frame when the latter is in raised or lowered position, the subframe also including provision for withstanding the thrust of the main frame power lift means.
    Type: Grant
    Filed: January 20, 1976
    Date of Patent: November 29, 1977
    Assignee: Eugene A. LeBoeuf
    Inventors: Stephen A. Kingman, Leslie A. Weaver