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Does anybody know how to make a self-inflating device which is not powered? Answered

I want to create a self -inflating cushion that is not mains powered. It could be battery operated but does anybody know how to do this in a way that does not[ involve power? thanks


2 Replies

alexhalford (author)2009-06-05

You could use a system that mixes sodium carbonate and an acid (eg vinegar). Or, more violent but effective: Car air bags use an explosive charge that produces a lot of gas very quickly. If you look around, air bags shouldn't be too hard to find (try scrap yards etc) You mention it's for a cushion, so it may produce too much gas and burst your cushion but some imaginative tweaks ought to fix that (eg reducing the charge in the air bag).

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vince 09 (author)2009-06-04

I've seen emergency life jackets that use small CO2 cans. you pull a string and it inflates I'm sure you could rig up an electric moor to pull the string and than put that device on the cushion you are wanting to inflate

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