Recipro-Pump

Double-action reciprocating piston pump driven by a crank. Right now it's in early WIP stage, so there's likely some stuff that'll be added later on. Piston ends need O-rings to seal and also needs some check valves to actually work, although I may model those in later.

I think most mechanically inclined people can figure out how the pieces will go together, since it's not too complicated.

--- Edit ---
Made a few changes since first posting this. The two illustration renders should make it a bit more clear. Most things should go together now, yet it still needs some fastener holes. Also at the moment I'm leaving off the valving that's needed for this to work as a pump. Takes 4 check valves and two T-connectors for this to work, other than that the idea for how the piston works to displace the fluid should be fairly workable. Just a square end on the one drive shaft, and I could model a crank if you really need it. Also I think this might be easy to do a through shaft version to