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Wireless irrigation control

  • US 8,245,720 B2
  • Filed: 11/12/2008
  • Issued: 08/21/2012
  • Est. Priority Date: 11/20/2007
  • Status: Expired due to Fees
First Claim
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1. A control valve having an inlet, a first outlet and a second outlet, the control valve comprising:

  • means for selectably closing one of a first passage between the inlet and the first outlet and a second passage between the inlet and the second outlet;

    a first diaphragm, the first diaphragm moving from a first position in operative contact with the means for selectably closing to close the second passage and a second position that permits the means for selectably closing to close the first passage;

    a second diaphragm;

    means for separating the first and second diaphragms and for providing a controlled rate flow of fluid between volumes adjacent to the first and second diaphragms to cause the first and second diaphragms to move in unison; and

    means for making a wireless transmission only when the first diaphragm moves to the second position.

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