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This is very interesting and heartening. In India too, we have issues with multiple languages and illiteracy. Very commendable of these students to consider such factors.
I have a question about the user manual. Will illiterate users be aware that crossed lines mean 'forbidden', and will they be able to correlate the action with the diagram properly? I can read and write, but I have problems sometimes with pictorial instructions that are vague. Perhaps field trials are called for to check the efficacy of the user manual?


A wonderful idea where creativity and true global thinking come together! Congratulations!!
I wonder, though, if it would be a good idea to offer a variety of this design which can be operated with a bicycle. I could imagine not all folks have access to welding equipment or experience how to use it. Maybe a bike-based design could be a good alternative.


S M (#1), thank you for your kind words!

You are right that the manuals would need to be field tested before. As we are still improving the construction of the extractor, the manuals need to be updated along the way. It’s as you say difficult to know whether the manuals will be correctly interpreted. In our project, the extractor is intended to initially be implemented via the organisation, Biovision Infonet, that so kindly assisted us in our project. Biovision have small resource centres spread in many rural areas of Kenya, where farmers can come for information and advice. Our thought is that prints and manuals would be available at the resource where the information officer can discuss with the farmer/s the potential of setting up a small juice production in that specific area and then also how to go about it. The manuals are intended to function as a support to this for the farmer/s to take home and study.

Thank you for the encouraging words and interesting comment, Birgit (#2)!

The extractor itself is intended to be manufactured by the jua kali (collective name for the self-employed artisans mainly working with wood and metal) The jua kali are found in most villages. From what we learned from our visit and our Kenyan friends, the jua kali have access to welding machines, sometimes they are “home made”.

Your idea about bikes is a good one but it also means the farmer/s must invest in a bicycle, which (in addition to the extractor and/or other machines) is quite costful. Many farmers that we met do not have bikes today. We therefore decided that the extractor should be possible to use without extra equipement.


You people are amazing!! Congradulations on making an effort to get people who really need to be engaged in the prosperity of our planet engaged. What you along with many others are doing to get back to basic farming and manufacturing using the technology ideas of today is very important not only to people in underdeveloped countries but to many in industrulized countries. If you are a believer in Dec 21, 2012, it's especially important for any who see 2013.


Can you tell us about any more progress in 2012? This is fascinating. Such wonderful ideas and well thought out! I would love to hear more about your recent successes - and if this has been implemented elsewhere? Although it seems like a step back to some -- for others -- it could be their "one giant step forward .." Kudos to all who are making this happen.....


one of the pics, it looks like they're saying 'clean the bottles in the boiling juice'. perhaps a pic that shows two separate pots, one with gray foam, the other with bottles, and the funnel in it.


That is one Beautiful design. I especially like that belt drive - this is so elegant.
Only two things occurred to me. You've probably thought of both yourself but I'll say them anyway :)

The peddle crank could be extended to allow for a second peddler (preferably 90 deg rotated to smooth torque imput)

The other thing is the attachment of the beater shaft to the drive. Those two screws look like they would be time consuming to attach/detach. Also things like that are the first to wear out / break, also a slick easy attachment there would encourage better cleaning. If its awkward to do something like that people will be more likely to skip it.

I wonder if you have tried using an inner tube as that belt drive? Maybe after cutting off the valve stem and fixing a tube repair patch over the resultant hole.

But again cheers! You guys are doing good in the world. May all your Kama be good:)

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