Sylvester J Liebrecht

US Patent:

51136104, May 19, 1992

Filed:

Oct 31, 1991

Appl. No.:

7/785533

Inventors:

Sylvester Liebrecht - Continental OH

International Classification:

E02F 508

US Classification:

37 94

Abstract:

A method and apparatus in which a laser controllable ditcher drawn by a tractor to which it is attached for forming ditches, furrows and the like incorporates a cutting disk which is adjustably inclined downwardly toward the rear of its direction of travel such that its under face forms an acute angle with the ground beneath so that its leading edge cuts into the ground. The disk is driven rotationally through a speed reducer by a driveshaft extending to the ditcher from the tractor. The disk has spaced cutters at its edge which dig into the soil and cause the soil to be lifted into the path of movement of paddles or scoops on the back side of the disk which in effect throw the soil particles a considerable distance to one side of the tractor path. The distance of throw is established by the depth of cut and is assisted by an adjustable inclination or lift of the upward moving side of the disk in rotation to produce the desired trajectory for throwing the soil a distance to one side such that upon subsequent passes of the ditcher the soil is not required to be picked up again and redistributed.

US Patent:

55113265, Apr 30, 1996

Filed:

May 9, 1994

Appl. No.:

8/240115

Inventors:

Sylvester J. Liebrecht - Continental OH

International Classification:

E02F 508

US Classification:

37 93

Abstract:

A method and apparatus in which a disk-type ditcher adaptable to being drawn by a tractor can dig ditches under control of a laser system by which a desired ditch grade can be selected. The ditcher incorporates a disk rotatable in a generally vertical plane transverse to the line of travel of the ditcher, the disk having circumferentially spaced scoops which during rotation function in cooperation with a bottom-cutting blade and soil plowing section to lift the cut soil for discharge from an angularly oriented overlying chute for directing soil particles a pre-selected lateral distance from the line of travel of the tractor. A pair of forwardly and oppositely positioned angularly adjustable side cutting or scraping blades can be provided in spaced relation on opposite sides of the center line of travel to impart steeper side walls to the ditch than would otherwise be formed with the circular disk alone.