Variable Gas Pressure Regulator
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United States of America Patent
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app pub date -
Feb 27, 2014
filing date -
Aug 28, 2012
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Abandoned
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Abstract
A variable gas pressure regulator comprises a throttling valve regulating the fluid flow between a high-pressure fluid inlet and a regulated space fluidly connected to a fluid outlet, a high-pressure solenoid commanded to control fluid flow between the fluid inlet and a control space and a low-pressure solenoid commanded to control fluid flow between the control space and the regulated space. The regulator achieves a variable pressure at the regulator outlet by commanding the two solenoids to control the pressure in the control space relative to the regulated space. The regulator further comprises a lock-off valve which is controlled by the action of the low-pressure solenoid and of the high-pressure solenoid based on the relative pressure difference between the control space and the regulated space. The lock-off valve seals the passage between the fluid inlet and the regulated space.
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