With further development I realized that the problem with geyser pumps is that most of the energy in the air that is being pumped to the depth of water is wasted as it rushes out to push a small volume of water out of the pipe. This led me to think of a more efficient design that would behave more like a Super Soaker toy such that the volume of water being pumped out is equal to the volume of air that it displaces. My thinking was if a closed chamber of liquid with a pipe inserted into it had air pumped in it the liquid would have no place but to go upwards and be pumped out of the pipe to a higher head, add an upside down siphon to this pipe (to make it a geyser pump) and as the "air level" reaches the siphon portion of the geyser pump, the air will rush out and at this point the pump chamber should be refilled. To switch from sealed to unsealed, a simple checkvalve is used. I was elated to think of this idea and to prototype it and find that it works brilliantly. I was less pleased to find this exact idea already published and patented.
This is a prototype of my air powered water liftingpump. Invented first piece in 2010 which turned out to be called a "geyser pump" patented 2008. My design evolved into this last year but somehow this was patented 1973. Sometimes older tech is better :) Even though I'm not the first to think of this idea, I seldom see it in aquaponics applications which is what I intended it for. It pumps at a much higher head and at a much faster rate than typical airlift pumps or geyser pumps.
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