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Material application system with programming security

  • US 5,961,040 A
  • Filed: 03/13/1998
  • Issued: 10/05/1999
  • Est. Priority Date: 03/13/1998
  • Status: Expired due to Fees
First Claim
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1. A method of using a material application system adapted to be incorporated in a vehicle for applying material to a road, said material application system having a programmable controller, an input mechanism associated with said programmable controller, and a switch module associated with said programmable controller, said method comprising the steps of:

  • (a) operatively coupling said input mechanism to said programmable controller;

    (b) while said input mechanism is operatively coupled to said programmable controller, using said input mechanism to input a parameter relating to a granular application rate into said programmable controller;

    (c) while said input mechanism is operatively coupled to said programmable controller, using said input mechanism to input a parameter relating to a liquid application rate into said programmable controller;

    (d) after said steps (b) and (c) , operatively uncoupling said input mechanism from said programmable controller;

    (e) while said input mechanism is operatively uncoupled from said programmable controller, using said material application system to apply granular material to a road;

    (f) while said input mechanism is operatively uncoupled from said programmable controller, while said switch module is operatively coupled to said programmable controller, and while said material application system is being used to apply granular material to a road, using said switch module to modify said granular application rate; and

    (g) while said input mechanism is operatively uncoupled from said programmable controller, while said switch module is operatively coupled to said programmable controller, and while said material application system is being used to apply granular material to a road, using said switch module to modify said liquid application rate.

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