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Re: Re: [PSUBS-MAILIST] New underwater breathing device
here is the Patent from European Patent Office
http://v3.espacenet.com/textdoc?IDX=EP1343683
i just downloaded the pdf from that page
it forces 2000 liters about 530 gallins of water through the device per minute. this seems like a lot of water.
Andy
From: Ray Keefer <psubs2001@yahoo.com>
Date: 2005/06/08 Wed AM 10:32:44 CDT
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] New underwater breathing device
Hi,
I am curious, how much power would this system need?
The centifuge would have to be spun. Pumps? How does
it make sure the extracted gases have enough oxygen in
a healthy proportion. Is there a gas seperator and
mixer? Is there actual working hardware?
Regards,
Ray
--- drewacard@charter.net wrote:
> Alan Izhar-Bodner, an Israeli inventor, has
> developed a way for divers to breathe underwater
> without cumbersome oxygen tanks. His apparatus makes
> use of the air that is dissolved in water, just like
> fish do.
>
>
> (From Breathe like a fish!)
> The system uses the "Henry Law" which states that
> the amount of gas that can be dissolved in a liquid
> is proportional to the pressure on the liquid. Raise
> the pressure - more gas can be dissolved in the
> liquid. Decrease the pressure - gas dissolved in the
> liquid releases the gas. This is exactly what
> happens when you open a can of soda; carbon dioxide
> gas is dissolved in the liquid and is under pressure
> in the can. Open the can, releasing the pressure,
> and the gas fizzes out.
>
> Bodner's system apparently uses a centrifuge to
> lower pressure in part of a small amount of seawater
> taken into the system; dissolved gas is extracted.
> The patent abstract reads:
>
>
> A self-contained open-circuit breathing apparatus
> for use within a body of water naturally containing
> dissolved air. The apparatus is adapted to provide
> breathable air. The apparatus comprises an inlet
> means for extracting a quantity of water from the
> body of water. It further comprises a separator for
> separating the dissolved air from the quantity of
> water, thereby obtaining the breathable air. The
> apparatus further comprises a first outlet means for
> expelling the separated water back into the body of
> water, and a second outlet means for removing the
> breathable air and supplying it for breathing. The
> air is supplied so as to enable it to be expelled
> back into the body of water after it has been
> breathed
>
>
http://www.livescience.com/scienceoffiction/050606_breathe_underwater.html
>
> looks amazing.
> Andy
>
>
>
>
>
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