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Valve with fail-safe device

  • US 10,443,751 B2
  • Filed: 04/17/2017
  • Issued: 10/15/2019
  • Est. Priority Date: 03/13/2013
  • Status: Active Grant
First Claim
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1. A valve comprising:

  • a housing;

    a first flow control valve for controlling flow of a first fluid from a first source;

    a second flow control valve for controlling flow of a second fluid from a second source;

    a first actuator that is configured to move the first flow control valve;

    a second actuator that is configured to move the second flow control valve;

    a fail-safe device that holds each of the first and second actuators in a control position in response to electric power being supplied to the valve, wherein the fail-safe device releases the first and second actuators in response to an absence of electric power being supplied to the valve such that the first actuator and the first flow control valve move toward a closed position and such that the second actuator and the second flow control valve move toward a closed position;

    a first spring that is disposed between the first actuator and the housing and is configured to apply a biasing force that biases the first actuator away from the housing; and

    a second spring that is disposed between the second actuator and the housing and is configured to apply a biasing force that biases the second actuator away from the housing.

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