Method and system of operating a trans-fill device

1. A method comprising:

generating an enriched gas stream from atmospheric air;

operating an intensifier which, when provided the enriched gas stream, produces a cylinder fill gas stream, and wherein the operating continues in the absence of the enriched gas stream being provided to the intensifier.

2. The method as defined in claim 1 further comprising:

analyzing oxygen content of the enriched gas stream; and

refraining from providing the enriched gas stream to the intensifier when the oxygen content is below a predetermined threshold.

3. The method as defined in claim 2 further comprising supplying the cylinder fill gas stream to a cylinder when the oxygen content is above the predetermined threshold.

4. The method as defined in claim 2 further comprising releasing at least a portion of the enriched gas stream when the oxygen content is below the predetermined threshold.

5. The method as defined in claim 4 wherein releasing further comprises releasing proximate to an inlet of a compressor that supplies air to a device that generates the enriched gas stream.

6. The method as defined in claim 2 wherein refraining further comprises refraining from providing when the oxygen content is below approximately 90 percent.

7. The method as defined in claim 1 further comprising continuously releasing a portion of the enriched gas stream.

8. The method as defined in claim 7 wherein continuously releasing further comprises continuously releasing approximately 0.5 liters per minute.

9. The method as defined in claim 7 wherein continuously releasing further comprises releasing proximate to an inlet of a compressor that supplies air to a device that generates the enriched gas stream.

10. The method as defined in claim 1 further comprising sensing attributes of the cylinder fill gas stream with a pressure transducer.

11. The method as defined in claim 10 further comprising ceasing generating and operation if one or more selected from the group: the rate of pressure increase of the portable gas cylinder is substantially zero yet below a predetermined full threshold; and the rate of pressure increase indicated incomplete coupling to the portable gas cylinder.

12. A system comprising:

a compressor;

a concentrator fluidly coupled to the compressor, the concentrator creates an enriched gas stream;

an intensifier with a motive portion and a compression portion, the motive portion fluidly coupled to the compressor, and the compression portion fluidly coupled to the enriched gas stream on one side and configured to couple to a portable gas cylinder on a second side, wherein the compression portion compresses the enriched gas stream to create a high pressure enriched gas stream; and

a control valve fluidly coupled between the concentrator and the intensifier, the valve selectively blocks enriched gas flow to the intensifier;

wherein the motive portion of the intensifier continues to draw compressed air from the compressor when the control valve blocks enriched gas flow to the compression portion of the intensifier.

13. The system as defined in claim 12 further comprising:

a gas analyzer fluidly coupled to the enriched gas stream;

a processor electrically coupled to the gas analyzer and an actuator of the control valve;

wherein the processor commands the control valve to block enriched gas flow to the intensifier when an oxygen content of the enriched gas stream is below a predetermined threshold.

14. The system as defined in claim 13 wherein the predetermined value is 90% oxygen concentration.

15. The system as defined in claim 13 further comprising:

a dump valve fluidly coupled to the enriched gas stream which selectively releases enriched gas;

wherein the processor commands the dump valve to release enriched gas when the oxygen content of the enriched gas stream is below the predetermined threshold.

16. The system as defined in claim 15 further comprising a tubing fluidly coupled to the dump valve on a first end, and a second end of the tubing proximate to an inlet of the compressor.

17. The system as defined in claim 15 wherein when the dump valve releases enriched gas at approximately 2 liter per minute.

18. The system as defined in claim 15 wherein the control valve and the dump valve are the same valve.

19. The system as defined in claim 18 wherein the dump valve releases enriched gas at a flow of approximately 2 liters per minute.

20. The system as defined in claim 12 further comprising a port that allows continuous controlled release of a portion of enriched gas stream.

21. The system as defined in claim 20 wherein the portion of the enriched gas stream escapes through the port at approximately 0.5 liters per minute.

22. The system as defined in claim 20 further comprising:

a case, wherein at least one of the compressor, PSA system, product tank, intensifier or control valve are within the case;

wherein the port is exposed through an aperture of the case, and the port is configured to couple to a portable gas analysis device.

23. The system as defined in claim 12 wherein the control valve further couples to a valve position controller electrically coupled to the processor, wherein the processor selectively controls the flow rate through the valve.

24. The system as defined in claim 12 further comprising:

a pressure transducer fluidly coupled to the high pressure enriched gas stream;

a processor electrically coupled to the pressure transducer, wherein the processor detects attributes of filling the portable gas cylinder.

25. The system as defined in claim 24 wherein the processor performs one or more selected from the group: turns off the compressor if the rate of pressure increase in the portable gas cylinder is substantially zero yet below a first predetermined threshold pressure; turns off the compressor if the rate of pressure increase indicates an inadequate coupling of the portable gas cylinder to the intensifier; and restarts the compressor if the pressure the portable gas cylinder leaks off to below a second predetermined threshold pressure.