Abstract: A towable scraper system for contour surface grading. The system includes a rigid chassis member that has a coupler configured for attachment to a conventional three-point tractor hitch. A scraper blade is pivotally suspended from the rigid chassis member and is equipped with a blade motivator for causing an angular rotation of the blade around an axis aligned with a towing direction. A lift assembly raises and lowers the rigid chassis member to control a height of the scraper blade relative to a work surface to be graded. The towable scraper system is provided with a carriage assembly that offers rolling support for the rigid chassis as it moves over the work surface. The carriage assembly is pivotally coupled to the rigid chassis at a location opposed to the coupler and is configured for angular rotation around a second axis aligned with the towing direction.

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.