Of Material Leveling Means Patents (Class 404/84.1)
  • Patent number: 6168348
    Abstract: A bi-directional surface leveling system comprises a chassis attachable to a motion source and having a hitch, a grader frame pivotably connected to the hitch and supporting a box grader, and a forward frame pivotably attached to the grader frame and having a caster wheel for supporting the chassis. The box grader holds a bi-directional earth grading tool. Also included is a damping assembly attached to the hitch to dampen upward movement of the grader frame. A powered assembly is pivotably connected at one end to the forward frame and at the opposing end to the grader frame, and a control unit connected to the power assembly selectively extends and retracts the power assembly.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: January 2, 2001
    Assignee: Southern Laser, Inc.
    Inventors: Frederick A. Meyer, Robert W. Crowley, Dana E. Schroeder