Method and Apparatus for Automatically Maintaining a Desired Level of Oxygen in a Refuge
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United States of America Patent
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Issued Date -
Apr 25, 2024
app pub date -
Dec 15, 2023
filing date -
Dec 15, 2023
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Abstract
An apparatus for controlling a level of gas in a closed environment from a gas supply having a gas sensor for detecting the level of gas in the closed environment. The apparatus has a valve in communication with the gas supply which is automatically opened without human interaction, monitoring and adjustment to release gas from the gas supply into the environment when the level of gas in the environment goes below a first predetermined level and which is automatically closed without human interaction, monitoring and adjustment to stop gas from being released from the gas supply into the environment when the level of gas in the environment goes above a second predetermined level. A method for controlling a level of gas in a closed environment from a gas supply. A refuge chamber.
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