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

http://www.ropepump.com/
http://autonopedia.org/crafts_and_techn ... _pump.html


HOW THE ROPE PUMP WORKS
The basic elements of the Rope pump are an endless rope with conical shaped pistons placed at intervals of 1 meter. The rope with pistons is lifted by a wheel, in this way pulling up the water to the surface through the PVC pump tube.
The wheel and handle is made of galvanized tube and spokes that clamp the inner parts of a car tire, forming a perfect pulley.
The pistons are made of Polyethylene and fit with a small clearance in the pump tube to avoid hydraulic losses. The rope with pistons turns around at the bottom of the well by means of a concrete guide block with an internal ceramic or glass piece to reduce wear at this point.

Nice share, thank you!