Variable Frequency Drive for Gas Dispensing System
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United States of America Patent
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Issued Date -
Dec 3, 2009
app pub date -
May 27, 2009
filing date -
May 27, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A fixed and/or stationary modular unit consists of a hydraulic fluid tank, a variable frequency drive consisting of a variable frequency controller, a variable frequency motor, and a pressurization pump. A compressed gas transportation system consists of a cylinder or set of cylinders. Each cylinder has a charging port and a dispensing port. A pair of valves are located at each charging port of each cylinder, with one valve connected to an incoming hydraulic fluid line and the other valve connected to a hydraulic fluid return line. A valve is connected at the dispensing port of each cylinder. As gas is dispensed from cylinders, hydraulic fluid is pumped from the tank by the variable frequency drive into the cylinder at a rate substantially equal to the dispensing rate of the compressed gas to maintain a constant pressure within the cylinder.
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