Welding versus Medical O2?

[Scuba Duck]

Cole Parmer Mixing Tube. If you insisted on knocking off the stick, this is a much better way to go than the cascading orifice. This is also the device used by Nuvair and other Membrane manufacturers to mix the permeate with air. If you use the formula on the McMaster Carr website, be careful to convert everything to the correct units.

It is against intellectual property law to infringe on the patent and sell a similar product. There is no viable way to enforce the patent against the home stik builder. Much like there is no good way for the record companies to stop illegal down loading at the user level. Never the less, it is still against the law. And you are stealing from the people who created the product.

 

[Thalassamania]

Please correct me if I'm wrong: the sticks were developed on Goverment time using Government equipment.

 

[Scuba Duck]

The Concept of the Continuous Gas Blender was initially developed by Dr. Morgan Wells, one of the former Directors of NOAA, on government time, with government equipment. He never really got paid for his initial groundbreaking efforts.

Mr. Ross Cowell worked with Dr. Wells, and refined it into the Nitrox Stik you see today. He holds the patent for the Nitrox Stik and he does get royalties for each Stik sold. I'm not sure if he and Dr. Wells have an arrangement.

http://www.envirodive.com/nitroxinfo.php

 

[Hoosier]

Good luck enforcing that patent. Looks like its being tread on all over.

Check out http://www.mcmaster.com/ page 472 has all sorts of premade mixing sticks like this for 1/20th of your price. If you want to get anal they even have the quite simple formula to calculate a Reynolds number to confirm complete mixing.

It is still priceier than a simple practice golf ball (dozen per $1).

 

[Rick Inman]

It is against intellectual property law to infringe on the patent and sell a similar product. There is no viable way to enforce the patent against the home stik builder. Much like there is no good way for the record companies to stop illegal down loading at the user level. Never the less, it is still against the law. And you are stealing from the people who created the product.

Building your own stick at home for personal use is nothing like ripping off someone else's recording, and is not illegal, or stealing.

 

[Hoosier]

Building your own stick at home for personal use is nothing like ripping off someone else's recording, and is not illegal, or stealing.

It sounds like all DIY projects are illegal....:huh:

 

[Scuba Duck]

http://en.wikipedia.org/wiki/Patent

"Contrary to a common public misconception, a patent is not a right to practice or use the invention. Rather, a patent provides the right to exclude others from making, using, selling, offering for sale, or importing the patented invention for the term of the patent, usually 20 years from the filing date. A patent is, in effect, a limited property right that the government offers to inventors in exchange for their agreement to share the details of their inventions with the public."

Downloading music, or making your own nitrox stik, is a violation of intellectual property law.

http://en.wikipedia.org/wiki/Intellectual_property

They are very similar. And both illegal.

 

[Thalassamania]

Morgan, is an old and dear friend, and I can assure you that he was well paid for his efforts on behalf of the American people.

BTW: Morgan ran the NOAA Diving Office. He was never the Director of NOAA, which does not have a Director, it has an Administrator who holds the title of Undersecretary of Commerce for Oceans and Atmosphere, that is someone much better paid than Morgan ever was.

 

[Dan Gibson]

And most of us are still not going to spend a couple grand on a stick when we can make it for a fraction of the cost.

The Cole-Palmer inline static mixers work fine and you can get them cheaper at McMaster.

http://en.wikipedia.org/wiki/Patent

"Contrary to a common public misconception, a patent is not a right to practice or use the invention. Rather, a patent provides the right to exclude others from making, using, selling, offering for sale, or importing the patented invention for the term of the patent, usually 20 years from the filing date. A patent is, in effect, a limited property right that the government offers to inventors in exchange for their agreement to share the details of their inventions with the public."

Downloading music, or making your own nitrox stik, is a violation of intellectual property law.

http://en.wikipedia.org/wiki/Intellectual_property

They are very similar. And both illegal.

 

[rjack321]

My mixer does not have:

rigid stators are an in-line adjacently end-to-end array of radially extending helical blades, said array of radially extending helical blades extending radially outwardly of a generally centroidal longitudinal line of symmetry of said sealed gas conduit, said array of radially extending helical blades helically spiralled in a downstream direction relative to said centroidal longitudinal line of symmetry, adjacent end-to-end blades in said array of radially extending helical blades having alternating directions of spiralled rotation.

As described in Coswell's patent #5,992,464. I am no more in violation of his mixing design than I am Coswell's marginal infringement on Dr. Wells' original patent #4,860,803. You can see them both here: http://www.uspto.gov/patft/index.html