This can’t be right...It suffers from two huge problems.
The first is oxygen toxicity...It would be dangerous to use below 10-15 feet in depth.
Secondly, an active diver requires about a quart of oxygen per minute. If seawater has 8ppm oxygen, you’d need to filter 51 gallons of it through the device per minute to supply enough oxygen to sustain him. I have a hard time seeing that device pushing 51 gpm even if it were nuclear powered. :)
“Secondly, an active diver requires about a quart of oxygen per minute”
Wouldn’t that be air per minute? Which would come from 10 gallons of water? Also, the water is in contact with the outside of the filter. Th outside is exposed to a lot of water, The pump only has to handle the quart of oxygen per minute.