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Earthmoving apparatus and method for grading land providing continuous resurveying

  • US 5,375,663 A
  • Filed: 04/01/1993
  • Issued: 12/27/1994
  • Est. Priority Date: 04/01/1993
  • Status: Expired due to Term
First Claim
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1. An earthmoving apparatus for grading a tract of land to a desired finish contour, said earthmoving apparatus comprising:

  • a blade for cutting and filling soil of said tract of land, said blade having a known width;

    blade movement sensor means for detecting vertical movement of said blade;

    elevation sensor means for detecting elevation of said soil as said earthmoving apparatus traverses said tract of land;

    position sensor means for detecting x and y position of said apparatus as said apparatus traverses said tract of land; and

    computer means for displaying a contour map of said tract of land, said contour map having cut and fill lines thereon, and for continuously modifying said contour map as said earthmoving apparatus traverses said tract of land based on said detected elevation of said soil, said blade width, said x and y position of said apparatus and said desired finish contour.

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