Automatic leveling system for a grading blade

Details Automatic leveling system for a grading blade Automatic leveling system for a grading blade

1998-09-14

2000-02-29

Pezzuto, Robert E.

Earth working

Automatic power control

Land leveller type

1724451, E02F 376

Patent

active

060297522

ABSTRACT:
A hitching system for a tractor or similar vehicle which includes a parallelogram of four rigid members rotatably connected together at the ends of each of the members and in which the members are arranged to provide at least one member which is positioned vertically and moves essentially in the vertical direction despite variations in the surface of the terrain and the height to which the movable vertically positioned member is adjusted. This movable, vertically positioned member is connected to a blade, such as a box blade, to cause the blade to be held with its lower surface generally parallel to the desired final grade of the terrain. The blade is adjusted in the vertical direction as necessary to level the surface of the terrain by a hydraulic cylinder. A laser guidance system is included in a preferred embodiment to control this hydraulic cylinder and the height of the blade with respect to the terrain.

REFERENCES:
patent: 4244123 (1981-01-01), Lazure et al.
patent: 4299290 (1981-11-01), Nunes, Jr.
patent: 5267517 (1993-12-01), Jones

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