Patents by Inventor Mark Harold Sickman

Mark Harold Sickman 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).

  • Patent number: 3952826
    Abstract: An articulated vehicle is disclosed which includes first and second vehicle sections interconnected by an articulating linkage. The articulating linkage includes a universal joint and a cooperating pantograph linkage. The universal joint and the pantograph linkage define a vertically extending steering axis about which the vehicle sections are relatively pivoted to enable steering. The pantograph linkage comprises a first link bar pivoted to one vehicle section in substantial alignment with the steering axis and second and third link bars connected between respective end portions of the first link bar and connecting locations on the other vehicle section. A steering actuator is connected between the first link bar and the associated vehicle section and is operated to provide forces for steering the vehicle.
    Type: Grant
    Filed: April 4, 1974
    Date of Patent: April 27, 1976
    Assignee: White Farm Equipment Company
    Inventors: Dean Marshall Barker, Mark Harold Sickman