Introduction: Piston Marble Pump

This is a piston marble pump i made for my marble machine after seeing
http://www.youtube.com/watch?v=0Fg3SkLm0o8
It takes 5/8 inch marbles.
The reason I like this pump design is because it doesn't let the marbles clack together when there are no marbles in the feeder. It is also less likely to jam then a previous model I built.

---Update---
Added a picture of the pump installed in the dragon marble reservoir.
The marbles enter through a hole between the feet and tail and exit through the mouth.
The dragon was already made, so I had to fit the new pump underneath as best I could.
https://www.instructables.com/file/FYAHUUCFZWXOVBY/?size=SMALL

Comments

author
MrE made it! (author)2013-09-01

Ok! So how about some instructions for building?

author
Jynx. made it! (author)2010-08-25

Do you manually put the marbles back in?

author
Octan made it! (author)2009-10-05

How do you prevent backflow?

author
OldVamp made it! (author)OldVamp2009-10-21

 in the 3rd picture you can see the 'drawing' of the 1/8 inch dowel with a spring on it that prevents back flow. its slanted on the end to allow a marble to push it out of the way, but not be able to push back through with just gravity.

author
Octan made it! (author)Octan2009-10-21

Thanks!
I'm trying to "translate" your pump to Plastic elctrical piping, w/o much success..... I used a 3" hinge as backstop.
I think I'll be less independent, and just copy your system, or maybe make an elevator out of a cross-cut of an old tyre innner tube? (glue U-shaped blocks of wood to the outside with anaerobic glue to lift the marbles )

author
skimmo made it! (author)2009-09-23

what does it do?

author
OldVamp made it! (author)OldVamp2009-09-23

Click the youtube link for a video of a similar 'marble pump' 'pumping marbles'

author
skimmo made it! (author)skimmo2009-09-27

its seems super pointless

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