Gas flow controller including valve decoupling mechanism
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United States of America Patent
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Apr 17, 2018
Issued Date -
N/A
app pub date -
May 29, 2015
filing date -
May 29, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Gas flow controllers for use in gas fired apparatus including a pilot burner and a main burner are described. A controller includes a pilot valve moveable between a closed position and an open position to provide selective fluid communication between a gas inlet and the pilot burner, a main burner valve providing selective fluid communication between the gas inlet and the main burner, an actuator configured to open the pilot valve, a flow controller valve operable to open and close a fluid flow path between the gas inlet and a back side of the main burner valve upon actuation of the actuator, and a decoupling mechanism. The decoupling mechanism is configured to connect the actuator to the pilot valve and to selectively disconnect the actuator from the pilot valve when the actuator is actuated and a pressure differential across the pilot valve exceeds a threshold pressure limit.
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