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Automatic flow controller employing energy-conservation mode

  • US 6,619,614 B2
  • Filed: 12/04/2001
  • Issued: 09/16/2003
  • Est. Priority Date: 12/04/2001
  • Status: Expired due to Term
First Claim
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1. An automatic flow controller comprising:

  • A) an electric valve operable by application of control signals thereto between a closed state, in which it prevents water flow therethrough, and an open state, in which it permits water flow therethrough; and

    B) a control circuit, including a switch operable between first and second switch states and an object sensor that generates a sensor output, for normally operating the object sensor and responding thereto by so applying control signals to the valve as to open the valve when the sensor output meets predetermined target criteria but refraining from operating the object sensor when the switch has remained in its second switch state for more than a predetermined minimum hold time.

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