Patents by Inventor Sylvester Liebrecht, Jr.

Sylvester Liebrecht, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5113610
    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.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: May 19, 1992
    Inventor: Sylvester Liebrecht, Jr.