It seems that some of you are jealous of success.
You berate the gentleman who patented the design, suggesting it was already obvious. Most of those making that particular claim betrayed that point by arguing earlier in the thread that an accumulator could not deliver the solution mentioned in the OP.
You have it in for the company that bought the licence to manufacture the product. They did not register the patent but had to pay to use it. Nevertheless, that simple and key fact has been manipulated by others here, either by ignorance or just to try to score a point off GAH.
My company has been accused of having our nose in the trough and in customers bottoms - whatever that means.
This doesn't make any sense to me. I have shared some of our experience with this forum, told you where to buy the products. I have provided actual flow rates from a real installation. When someone wanted to see the patent, I directed them to the website where it was lodged.
All of these things enable you, not restrict you. But you still want to argue about matters which are none of your business, or mine. I refer to the validity of the patent. I do not sell accumulators to the trade, if you want to buy them, go forth and do so.
There are situations where they would be the best option for customers, but if you want to stick your head in the sand, it is your customers who are the losers.
I don't recall hearing any heated discussions from engineers in Plumbcenter arguing over whether Saunier Duvals' patents are sound. How many of you question the patented Baxi Megaflo floating baffle? Do any of you know what that does? (we all know what it is meant to do).
And then there is Doitall. He still doesn't understand the basic principles of a simple hydraulic product, but that doesn't stop him from shooting himself in the foot and then reloading. In public.
Finally, there is no shame in success. Whether you are a plumber or a patent lawyer. Some of our learned respondents in this thread are both.