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Method and apparatus for controlling the slope of a blade on a motorgrader

  • US 5,078,215 A
  • Filed: 05/29/1990
  • Issued: 01/07/1992
  • Est. Priority Date: 05/29/1990
  • Status: Expired due to Term
First Claim
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1. A control system for controlling the position of an adjustably movable tool having a working edge carried by a vehicle in order to maintain a desired cross slope angle of a surface being worked by the vehicle comprising:

  • input means for selecting a desired cross slope angle of the surface being worked;

    slope sensor means for determining a sensed parallel slope angle of the tool parallel to its working edge and relative to horizontal, and a perpendicular slope angle of said tool perpendicular to its working edge and relative to horizontal;

    tool angle measuring means located on the vehicle out of contact with said surface for measuring an angle of rotation of said tool relative to the direction of travel of said tool; and

    processor means connected to said input means, said slope sensor means and said tool angle measuring means for controlling said sensed parallel slope angle of said tool to maintain said desired cross slope angle of said surface.

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