David S.
05-28-2003, 00:18
I was reading through some of the water filter threads and mulling over the various concerns dealing with pumping vs. gravity, vs. siphon. I personaly own a Pure Hiker and have enjoyed it very much. It does seem like the same thing could be accomplished with less weight....or if not less weight then with less effort.
I started thinking about how my self inflating sleeping pad basicly pumps itself full of air in a single "stroke". Is it concievable that you could have an accordian shaped Nalgene (like the bending part of a drinking straw) that wants to stay expanded but could...with a bit of force, be pushed down and as it expands, suck water into itself through a filtering mechanism. Ideally you would be able to walk away while it expanded and sucked itself full of water. Then of course the "accordian or whatever" pump would double as a water container. Some sort of purge valve would probably have to be incorporated to purge any air pockets in order to top it off. As I think about it there would be some potiental problems with air pressure and stuff.
This is just a brain storm. Anyone care to join in? David S.
I started thinking about how my self inflating sleeping pad basicly pumps itself full of air in a single "stroke". Is it concievable that you could have an accordian shaped Nalgene (like the bending part of a drinking straw) that wants to stay expanded but could...with a bit of force, be pushed down and as it expands, suck water into itself through a filtering mechanism. Ideally you would be able to walk away while it expanded and sucked itself full of water. Then of course the "accordian or whatever" pump would double as a water container. Some sort of purge valve would probably have to be incorporated to purge any air pockets in order to top it off. As I think about it there would be some potiental problems with air pressure and stuff.
This is just a brain storm. Anyone care to join in? David S.