Protection valve
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United States of America Patent
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Jan 19, 2016
Grant Date -
Jan 23, 2014
app pub date -
Feb 9, 2012
filing date -
Feb 10, 2011
priority date (Note) -
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Abstract
A protection valve includes: an input chamber into which air is introduced; a plurality of output ports through which air is discharged; and safety valves which open in response to a pressure increase on a primary side or close in response to a pressure decrease on a secondary side, the safety valves including a safety valve PV21 and a safety valve PV23. An air flow path from the input chamber is branched into a first branch line and a second branch line, and a time lag-creating valve having an opening pressure higher than the safety valve PV21 is provided at a upstream of the safety valve PV23 in the second branch line, so that the safety valve PV23 can open with a time lag after the safety valve PV21 opens, regardless of the difference between the opening pressures of the safety valves PV21 and PV23.
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