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Valve cartridge having pressure sensor for agriculture and weed control

  • US 6,062,496 A
  • Filed: 06/08/1998
  • Issued: 05/16/2000
  • Est. Priority Date: 06/17/1996
  • Status: Expired due to Term
First Claim
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1. A spray implement, comprising a plurality of valve assemblies, each of the valve assemblies comprising:

  • a solenoid valve capable of opening in less than 10 milliseconds;

    a spray nozzle;

    a housing having a chamber, the chamber extending from the solenoid valve to the spray nozzle;

    a pressure sensor disposed to detect a pressure in the chamber, andan error detection system coupled to receive a signal from the pressure sensor, the error detection system capable of detecting an error in the valve assembly operation based on the signal from the pressure sensor.

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