Disposable O2 Bottle Manual Add Valve Contest?

Tom Rose

Pikers...all of us are pikers....we don't have a clue how to do things on the cheap...

Here is a 3 dollar rebreather with oxygen tank.....

http://www.geocities.com/chickenheadlab/Project021017ThreeDollarRebreather.html

Now that is thinking out of the box.....

This guy contacted Dr Bob a few years ago and has us all beat.

I use some of his ideas when I show people how simple a rebreather can be in a little demo class I give on rebreathers.

Tom

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The 50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong the first time.

www.atlimp.com

Dave Sutton

OK.... I would not have thought about using a coke bottle for an 02 bottle.....

This design is gonna go aboard the boat. I can't wait.


Dave

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"Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com

cstmwrks

OK, you guys should get an award for taking something simple, low cost and fast to build and turning it in to a nightmare from h*ll. Rube Goldburg awards may apply. Bonus points for more dissimaller metels to increase corrosion in salt water.


It will take me awhile, but I will get a photo of the ORIGANEL non conductive, no moving parts, Mil spec non magnetic push to add valve that costs maybe $2.00 to $4.00 and CNC mill or Lathe not needed.

Tools needed : scissors and a drill bit.

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Why you ask... well it's not like I have anything better to do.

cool_hardware52

Pretty damn clever.

I want to see his booster and bailout bottle

Tobin

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www.deepseasupply.com

marekm

The booster will probably be a $1 3cc syringe with Luer lock fittings and a three way stopcock to act as a check valve. I've used this setup to re-pressurise small aerosol bottles.

Yankee Rebel

well after fussing with that manual add valve of mine, that most of you have probly been shaking your heads at thinking "WTF is wrong with this guy!?!?!?!?" when you saw the pics... i have decided that its just NOT worth pursueing anymore. the reasons are simple.

1 PITA to get set up where it doesnt leak. i got it to not leak for the most part by adding a double seal to it, once i got that done, i was content with that portion of things.. wich brought me to 2.

2. the cylinders LEAK like a sieve!! after the 3rd bottle "bleed" out on me and i couldnt get it to stop bleeding.. its gotten too expensive to continue this. at $6 a bottle of O2.. and ive gone thru 5 or 6 of them so far, plus my assorted materials costs... this is including the 1 cylinder that only had about 8liters of O2 in it, and one that "seemed" full-ish....itd have been cheaper and better to have bought the entire bernzomatic kit and scrapped the crap i didnt use.

3. IF ID BOUGHT THE BENZOMATIC ORIGINALLY, WHEN THE CYLINDER LEAKED THE PROPER VALVE WOULD HAVE STOPPED THE LEAK IN THE VALVE WITH THE REDUNDANT SCHRADER VALVE SYSTEM. MY O2 WOULDNT HAVE P!$$ED OUT OF THE CYLINDER AT A RATE HIGH ENOUGH I COULD LITEREALLY BREATH OFF VERY SLOWLY!!!

4. if i ever have to make an emergency manual add valve ill just get a peice of innertube, 2 hose clamps, and a nail and hoseclamp the innertube to the valve threads, drop the nail down the innertube. and clamp the innertube to my O2 feed line or wherever, and when i need to add O2.. grab that nail with the innertube, and blindly push it into the hole.

screw it.. my cheap ass is buying a proper valve and modifying the bugger!!!

Tom was right! Doc Rob did it.. dont reinvent the wheel.. just roll with whats already been done.
if one has to be improvised fine.. but to do it the way i was trying.. too many issues and problems.

humbly and respectfully..
Yankee Rebel

Simon A

I've used (UK 2 Litre) plastic coke bottles as air tanks for other projects. filled through a tyre valve in the top they are repeatably good for 140-150 psi, at about 180 psi they start to stretch........
HTH
Simon A

Tom Rose

I respectfully do not agree. While your exercise did not work...what if it did work?

You are becoming an expert. Most of the time an expert is someone who has made all the mistakes and has finally gotten it right.

If we home builders took the time to report on all of our screwups, we would not have time to do anything....

I know I speak for all of us who hopefully just laugh as our selves when the hidden flaw in our reasoning bites us in the butt.

Keep up the good work....

Tom

__________________
The 50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong the first time.

www.atlimp.com

Dave Sutton

Yup.

My machine shop expertise was purchased at the cost of the 200+ "almost right but not quite" parts that live in a selection of milk crates under my workbench... special language used on each and every one of them.


Dave

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"Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com

Robert Iannello

Hello Friends and Greetings from the Crestline Experimental Dive Unit.

I do see a lot of familiar and friendly names on these pages. Wishing everyone well.

For this first post let me thank TOM ROSE for getting me to turn on this station, and YANKEE REBEL for tinkering in homebuilding, posting a challenge, declaring me the winner and delivering the reward as stated; a slightly used $20 dollar bill. Thank you, it is a good feeling winning a contest that I didn't even know I entered. (An acknowledgment, with the posted Award has been added to my 'Valve' page. CEDU Push-to-Add Valve ) Of course now I must view this Forum more often since it has been so rewarding.

I must say something to Yankee Rebel, please continue to tinker! Your comment ~ "...not reinventing the wheel...", well I I must agree with the others, Go ahead and reinvent the wheel. A significant way to learn is by doing, and you can learn more from mistakes, so long as they are not fatal, (risk assessment), so have fun in making them. Accepting what is presented is not learning. If you only read about a subject you will not really "Know" the subject. Tom Rose said you really only 'own' something when you can 'build it'. We all stand upon a body knowledge others have built, but we thrive in the world of knowledge that we personally discover and develope.

Dave is not alone in deriving the pleasure of first hand knowlege and experience that is enshrined so respectfully in those "milk crates under the workbench".

That experience and knowledge can never be completely transferred on the pages of a book. Only by walking in others shoes and doing what he has done, can you really know the full implications of the experience that has been gained. It is not odd that the totality of that experience is never completely transferred or appreciated, either by omission or comission. Do not stop re-inventing the wheel. You will only begin to roll on your own, when you can spin your own wheel, or know dam well why it it cannot, or should not spin.

Have fun.

Smile,
Bob
P.S. Thanks for the Jackson.
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CCO2