Has anyone tried making a centrifuge coffee maker?

Has anyone tried making a centrifuge coffee maker?  Coffee from a French Press is some of the finest you can brew, but it takes too long for the grounds to settle out.  A coffee centrifuge would (in principle) give you the French Press taste, with the clarity and smoothness of a filter machine.  It's just a question of how you'd go about making one!?

sort by: active | newest | oldest
roedward6 years ago
This would be a great idea for Cold Brewing coffee in particular as the temperature drop wouldn't matter. The idea that I had to accomplish this is as follows:
Parts:
6 Gallon Brew buckets used for Cold Brewing & beer fermenting
Rotating platform with electric motor and speed control
pump and hose
container for finished product

Procedure:
Rotate platform with 6 gal. bucket containing slurry of coffee and water.
Wait to achieve desired speed.
Take sample from the center of mixture.
Observe particulate level, color, clarity, etc., now taste test.
Ramp up or down speed for more or less centrifugation.
Rinse, repeat.
Drop hose into center of mixture and pump out when desired filtering has been achieved.

I have yet to attempt but I do have the materials so I'll update here (Instructables) with my findings!
jmrowland7 years ago
There's a patent filed: 
http://www.patentstorm.us/patents/4476776/description.html

The problem with filters is that they also tend to filter out the crema on the surface of the coffee. 

The best way to ensure that fine grounds don't litter your finished coffee is to use a burr grinder and replace the burr when it gets worn. If you keep the grounds at a uniform size and shape, you minimize the amount that gets through a French press' wire mesh.

But the idea of a centrifuge to further clarify brewed coffee is tempting. You could solve the balance problem by connecting two or more containers by a tube so that the liquid self-levels before sealing off the tubes; and you could solve the cooling problem by insulating the containers, themselves. At the end of the centrifuging process, you drain off the liquid top-first, leaving the particulates at the bottoms of the containers. Make the bottoms of the containers removable for cleaning.
Burf8 years ago
I use a French press coffee maker every day and I never have any problems with grounds. Does your filter have a hole in it or not seal against the sides of the beaker?
I add coffee, hot water, let steep for 5-6 minutes, press the filter down and pour. There is no waiting for the grounds to settle, the filter pushes and holds them to the bottom of the beaker while the brewed coffee is poured off the top.
I find they do lose their seal eventually though just making sure the edges of the mesh sit nice and round before sliding it down makes a big difference as it often gets kinks in it...
A centrifuge coffee maker would have a lot of problems in reality, the cooling effect and finding a safe and reliable way to centrifuge even enough for one cup.

What you could do and it's something I've considered is using the filter mechanism of a machine in conjunction with a french press, something simple that simply filters as you pour, part of what made me have this notion was someone giving absolutely lovely coffee, but ground fine for a machine, so I reckoned a filter in the both of the french press would remove the infinitesimal grains that just float on through a french press... 

You could even pillage a kettle for the filter, many have a little slip in filter mesh that's more than fine enough to deal with machine grounds...

That might be a good compromise between machine and pressed coffee...

Hope that helps...
 I've used centrifuges a lot.  You have a clever idea, BUT centrifuges really cool things down--the cups are metal and they whirl around in the air.  Plus they would be a pain to load.  Centrifuges have to be carefully balanced or else they vibrate, remixing particles, and at worse--fly apart.

There are also continuous centrifuges, which are essentially a pipe spinning around their long axis.  Liquid is added in the top and emerges from the bottom.  Again, cooling is the problem.

Actually, someone seems to have tried it, with poor results.  Take a look at http://www.jimseven.com/2007/03/15/espresso-meets-a-centrifuge/ 

A filter is easiest.
Most centrifuges operate inside enclosures - keep the excess volume of the enclosure small, you keep the cooling effect small.