by elfnor, published
Based on the mechanism seen here: sentex.net/~mwandel/marbles/pump.html.
This marble pump could be combined with many of the other marble runs found on thingiverse.
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I hadn't seen your rollercoaster up till now, but the pump and the rollercoater definietly go together. I had something like this is mind to do next. I think you've done a better job of the clips and support than mine, and I'm guessing my pump part will work with 1/2 inch ball bearings. So using your rig on top of the pump should work fine.
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As well as the printed plastic and cut acrylic you'll need:
8 small panel screws. (4g x 10 mm)
2 metal rods 3 mm diameter, 110 mm long.
12 glass marbles ~15 mm diameter
~1.5 m of 3 mm filament for the rails and supports.
The spiral rails, vertical supports and right angled bends were made by bending up 3 mm HIPLA (http://www.diamondage.geekofarm.com/?page_id=150). If using ordinary PLA it will probably be necessary to gently heat the filament to get nice curves and avoid breaking it.
1 set of crank_pieces
Print or Cut
Have a look at the marble_pump.blend file, the photo and the render to work out assembly. Depending on the printing quality you may need to sand the piston and cylinder to get a good fit.
The crank could be connected up to a motor for amusement.
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