Method and apparatus for filling a storage vessel with compressed gas
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United States of America Patent
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-
Nov 25, 2003
Grant Date -
Feb 27, 2003
app pub date -
Aug 23, 2002
filing date -
Aug 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A storage vessel is filled with compressed gas by filling a first tank with gas from a low pressure gas source. Hydraulic fluid is drawn from a reservoir and pumped into the first tank in contact with the gas. This causes the gas in the first tank to flow into the storage vessel as it fills with hydraulic fluid. At the same time, gas is supplied from the gas source to a second tank. Hydraulic fluid previously introduced into the second tank flows out to the reservoir as the second tank fills with gas. When the first tank is full of hydraulic fluid, a valve switches the cycle so that the hydraulic pump begins pumping hydraulic fluid back into the second tank while the first tank drains. The cycle is repeated until the storage vessel is filled with gas to a desired pressure.
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