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Load condition indicating method and apparatus for forklift truck

  • US 4,511,974 A
  • Filed: 01/22/1982
  • Issued: 04/16/1985
  • Est. Priority Date: 02/04/1981
  • Status: Expired due to Term
First Claim
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1. A method of indicating a load condition of a forklift truck having a tilt mechanism for tilting a mast and a lift mechanism for lifting a fork along said mast, comprising the steps of:

  • detecting loads applied to said tilt and lift mechanisms while a cargo is placed on said fork;

    calculating a weight of said cargo and a centroid position of the same based on the detected loads applied to said tilt and lift mechanisms; and

    displaying the load condition by indicating the calculated cargo weight and centroid position at least by a point which is located in a coordinate system having at least two axes one of which represents the calculated cargo weight as a first variable and the other of which represents the calculated centroid position as a second variable, said coordinate system providing a border line indicating an overload criterion area determined based on a forecast of overturn of said forklift truck.

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