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Grade averaging system with floating boom and method of using the same

  • US 5,984,420 A
  • Filed: 05/29/1998
  • Issued: 11/16/1999
  • Est. Priority Date: 05/29/1998
  • Status: Expired due to Fees
First Claim
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1. A traveling construction apparatus, comprising:

  • a frame;

    first and second ground engaging traveling gears connected to the frame and engaging the ground at first and second locations which define an imaginary line of ground contact in a direction of travel of the construction apparatus;

    traveling gear height adjustment means, connected between the frame and the first traveling gear, for adjusting a distance between the frame and the first traveling gear;

    an elongated boom pivotally connected to the flame at a pivot point and extending in the direction of travel;

    boom orientation control means for maintaining a selected angular orientation of the boom relative to the line of ground contact;

    a sensor means, mounted on the boom, for generating an input signal representative of a distance from the sensor means to the ground without contacting the ground; and

    height control means for actuating the traveling gear height adjustment means in response to the input signal from the sensor.

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