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Low-powered system for driving a fuel control mechanism

  • US 10,036,710 B2
  • Filed: 08/14/2017
  • Issued: 07/31/2018
  • Est. Priority Date: 09/30/2013
  • Status: Active Grant
First Claim
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1. A water heater comprising:

  • a water tank for holding heated water;

    a burner for heating water in the water tank;

    an electrically controlled gas valve for providing gas to the burner;

    a water heater controller operatively coupled to the electrically controlled gas valve, the water heater controller comprising a valve control circuit for controlling the electrically controlled gas valve, the valve control circuit comprising;

    a thermally activated power source;

    a reverse current protection circuit operatively connected to the thermally activated power source;

    an energy storage circuit operatively connected to the reverse current protection circuit for providing a pick current to pick the electrically controlled gas valve;

    a safety switch;

    a drive circuit operatively coupled to the electrically controlled gas valve, the drive circuit operatively coupled to the safety switch; and

    wherein providing a certain electronic signal to the safety switch permits current to flow through the safety switch to the drive circuit for the electrically controlled gas valve.

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