Hazardous gas protection system and method for automatic valve closure
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United States of America Patent
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Dec 9, 1997
Grant Date -
N/A
app pub date -
Nov 5, 1996
filing date -
Nov 5, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to an automatic valve actuating system that is responsive to various externally detected stimuli. The system is comprised of a monitoring and alarm components that close a valve upon the detection of a fault occurring from the undesirable presence of carbon monoxide or combustible gases. Combustible gases, such as, propane, methane, hydrogen and the like can create a hazardous explosive environment, especially when these gases are mixed with the oxygen in the air. The valve actuating apparatus mounts directly to an existing valve, such as one that opens and closes within a quarter of a turn. An audible alarm is given when a hazardous condition is detected. For those who are hearing impaired, an optional visual alarm is also given. A CO.sub.2 cylinder provides a pressure source to operate a pneumatic linear actuator. A low pressure switch sounds a secondary alarm to alert the maintenance personnel to replace the carbon dioxide tank.
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