yeah maybe in the patent drawing but in practical use it seems suficcient (and i also would guess that)
to use a top closed piece of pipe and drill some holes in the side to get fluid spraying out this holes.
if it only rotates and the liquid isnt sucked up simply put some fan blades on the LOWER end immersed in
the etchant and this will "throw" up the liquid in the tube by hitting it at very high speed.
i think the simplest and efficient design here would be a thick end plate with holes drilled at an angle
or a small dc fan blade wheel (plastic) glued in. these are available in just the right diameter i think
and because you don't need motor/bearing it can be the cheap type.
i really think you can find this wheels, maybe also look in old hand power tool cooling fan or so, or
small hand vacuum cleaner pump or some kinds of water pumps have them but i really think it works
entirely without anything on the end if it rotates really fast.
regards
st
24.04.2003 20:36:51, "Steve" <
alienrelics@...> wrote:
>In the patent drawing posted, it appears that the boards revolve,
>also, and that there are centrifugal pumps on the bottom of the shafts
>that pull etchant down and then force it out via the holes in the tube
>in the center.
>
>
>
>
>Steve Greenfield
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