| Patent application number | Description | Published |
|---|
| 20090007777 | In-Line Gas Purity Monitoring and Control System - Method for supplying a high purity gas product comprising providing a first gas stream including a major component and at least one impurity component, determining the concentration of the at least one impurity component, and comparing the concentration so determined with a reference concentration for that component. When the value of the concentration so determined is less than or equal to the reference concentration, the first gas stream is utilized to provide the high purity gas product. When the value of the concentration so determined is greater than the reference concentration, a second gas stream comprising the major component is provided and the first and second gas streams are mixed to yield a mixed gas stream having a concentration of the at least one impurity component that is less than the reference concentration. The second gas stream is provided by dividing the first gas stream into a first substream and a second substream, removing at least a portion of the at least one impurity component in the first substream to provide a purified substream, and mixing the purified substream with the second substream to provide the high purity gas product. The mixed gas stream is utilized to provide the high purity gas product. | 01-08-2009 |
| 20090205745 | Compressor Fill Method And Apparatus - A method an apparatus for filling a vessel with compressed gas is disclosed. Gas is compressed into the vessel at a predetermined flow rate using a variable speed pump or compressor. The flow rate is adjusted to increase the gas pressure at a predetermined rate of change. The flow rate is adjusted based upon the instantaneous value of a measured parameter such as gas temperature or pressure or ambient temperature. The parameter is measured by a transducer and the value is fed back to a controller which adjusts the speed of the compressor or pump to produce the flow rate needed to achieve the predetermined pressure rate of change. | 08-20-2009 |
| 20090236006 | Temperature-Compensated Dispensing of Compressed Gases - Method for dispensing a gas comprising (a) providing a gas storage system containing pressurized gas and having at least first and second gas storage volumes, first and second flow control valves in flow communication with the first and second gas storage volumes, respectively, wherein each flow control valve is initially closed, and wherein the first gas storage volume has a smaller volumetric capacity than the second gas storage volume; (b) selecting a reference temperature; (c) measuring the ambient temperature; (d) providing a gas receiving vessel and placing it in flow communication with each flow control valve and with the gas storage system; and (e) initiating delivery of the gas by (i) opening the first flow control valve when the ambient temperature is equal to or greater than the reference temperature or (ii) opening the second flow control valve when the ambient temperature is less than the reference temperature. | 09-24-2009 |
