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Wheeled vehicle with controlled-output spreader system

  • US 4,023,020 A
  • Filed: 04/04/1975
  • Issued: 05/10/1977
  • Est. Priority Date: 04/04/1974
  • Status: Expired due to Term
First Claim
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1. In a vehicle-carried spreader system which includes a reservoir for the material to be spread, a distribution chamber connected to the outlet of the reservoir, return connection means from the outlet back to the reservoir, valve means regulating the flow of the material in the return connection means and means for measuring the pressure in the distribution chamber,the improvement which comprises:

  • input means for setting in the desired value of spreader output and for setting in a value characteristic of spray nozzles used by the spreader system;

    means for measuring vehicle speed;

    means for utilizing the set-in values and measured speed to produce a reference value;

    means for comparing the reference value with the measured pressure; and

    means for controlling the valve means in accordance with the comparison.

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