METHOD AND APPARATUS FOR HIGH SPEED GRADING

摘要

A method and apparatus for high speed grading a road in a single pass. T he grader including a frame supported above a surface. At least one blade is pivotally fixed to the frame, and is positionable to engage the surface. A first biasi ng mechanism biases the blade toward a forward position. At least one leveling board is pivotally fixed to the frame, and is positionable to engage the surface rearwardly of the blade. A second biasing mechanism biases the leveling board toward a forward position. A packing mechanism is fixed rearwardly of the leveling board, and is positionable to engage the surface.