Floor,

Thank you for sharing your proofs. That took quite a bit of effort to produce.

Sincerely
Cadman

Nicely done Floor.

This illustrates the difference between the two conditions existing in the up-stroke vs. the down-stroke.
Something that I have failed to convey properly in all of my posts.
Now all that remains is to demonstrate it with the working prototype. Making progress there too.

Thank you!

Respectfully,
Cadman

Thanks

The pleasure is mine. I've gotten pretty fast at kicking out drawings and generally
enjoy doing them. Thanks again for your inspired design.

      best wishes

Hello All.

Since Cadman's original presentation I've been thinking a lot about it. May I offer " Concept 2 " for consideration?

Cycle description and drawing are shown from the " at rest " position.


Let's assume a working head of 2 meters. To the top of the cistern. The concertina is made to have an internal surface area of
6 square inches ( Cadman's piston ) this should provide a force of approximately 75 Lbs. The displacement cylinder is made to be directly connected to the top of the concertina but of a diameter that can just accommodate the volume of water from it. This should be around 6.1 Lbs in weight but because of the small diameter only create a couple of pounds pressure on the transfer valve. The displacement cylinder is allowed to move up and down through a central seal within the cistern. My single drawing shows the device at the start of the cycle. As water is admitted to the underside of the concertina the whole assembly will rise 150 mm
through the cistern. The displacer piston is rigidly fixed to a framework that carries the whole assembly. The top of the displacer piston has a simple " Leather cup washer " that will allow the water to pass it on the upstroke but then be retained on its return. On the return stroke the fluid now above the seal will naturally spill over the edge of the displacement cylinder back into the cistern.

My idea has just 2 areas of friction, one the sliding seal between displacement cylinder wall and cistern floor and the other is the flap valve ( cup washer ) mounted to the displacement piston top.

Cheers Graham.

Edit.

Drawing to follow pending resize. It seems I cannot resize the picture using my iPad so I'll post it anyway and re edit the page later today. My apologies for the inconvenience.

I did an experiment similar to this years ago.  I later had the idea that oil rises to the top in water, and it worked.  I did not complete the experiment  - however if you incorporate oil rising you may get a buoyancy advantage.  ie oil inside a ping pong ball should rise and can push a piston against gravity.  Then you have the problem of the return of course.

@SolarLab

F.Y.I.

Cadman,
These might be similar to your concept development and may possibly contain some valuable design and construction insight.

(Hydraulic) RAM PUMPS [a.k.a. Hydram]

  and so on.....

Its not a ram pump. Ram pumps are very cool, but also ram pumps have been around
for a long time.

Cadmann's design is very much dissimilar, because...
 ram pumps require an uphill sourceof water (usually a stream).  They allow one to divert
and lift A SMALL PERCENTAGE of that down flowing water to a point which is higher than
the original water source, but this is only BECAUSE MOST OF THE WATER FROM SOURCE
POINT CONTINUES TO FLOW DOWN HILL (BELOW THE RAM PUMP). 

Cadman's design functions based upon an entirely different approach / principle.

   floor

Hi Cadman.

The displacement cylinder is directly connected to the top of the concertina with the addition of a non return valve at its base. Its diameter is much smaller perhaps 3/4" ( 20mm ) at most. As your device is based around Pascal's law where the pressure increases by virtue of surface area obviously a small diameter tube will see around 2 PSI at most. This means that the force available from the large surface area of the concertina should have little problem moving the volume of water ( 6.1 Lbs ) from the concertina ( power cylinder ) into the displacement cylinder.

I chose the concertina over a piston and cylinder for several reasons. The major one being to reduce friction between piston seal and cylinder wall.

An effective concertina could be crafted from a Rubber inner tube, Quad bike/Garden tractor size. If sliced horizontally on its inner diameter the opening could be clamped down to the base, bottom/floor of the device. The upper edge might prove a little more difficult to achieve requiring two discs that clamp the Rubber together and also carry the 2 metre long vertical displacer cylinder.

Concept 2 is what it is, purely conceptual. I've thrown it out here for evaluation, nothing more.

Cheers Graham.