View Full Version : A New Type Of Efficient Dust Separator ?

Boyan Silyavski
25-09-2016, 07:45 AM
Hey there,

I think i bumped into an interesting dust separator while browsing the tube , that i would like to share with you.

I have this older variant mounted on top of 200l steel barrel.


Works pretty well but as recently i make a lot of dust per day, 93-97% efficiency translates as 5-6 times i have to clean my shop vacuum cleaner until i fill the 200l barrel in which i could pack 100kg and more of dust. cause 5% of 100kg is 5kg of fine dust that escapes the dust trap.

Most videos show how it captures 1kg and the result is great. They should really do a test after 1 day 8h nonstop work.

So i started to look and see if there is sth new on the horizon last years. It seems there is. 2 models more:


They seem smoother curved and maybe a bit more efficient.

But then i found maybe even a better idea.

Here is the video:


Here are the photos of his prototype:

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From the video even at first glance it looks better. I am quite into making myself one these days. It says centripetal forces, not centrifugal. I still dont get how that works though? The air is sucked like a fountain in the middle and the outer side of the waterfall pushes the dust to the walls? or sth like that.

Here is the original description from You tube:

" The fastest, most effective, and efficient dust collector ever made (sans a filter). The video shows a prototype device actually removing dandelion florets and down-feathers from a 60 mph air-stream to a wet/dry vacuum. This Patented device uses centripetal forces to rapidly (less than .02 second) remove debris from airflow between a debris source such as a woodshop power tool and a vacuum source such as a shop-vac. Prior devices rely on gravity to remove the debris from a cyclonic airflow, which can be very slow. Consequently, those devices are not very effective (remember, stuff goes up in a tornado, not down).

This device comprises a first chamber that is situated above and adjoins a second chamber. The first chamber is dome-shaped and has an upper centrally mounted output port that connects via a hose to a vacuum. The first chamber also has a downward and outward sloping sidewall such that debris-borne airflow entering through a tangential input port is centrifugally forced to the inner surface of the sloping sidewall. The debris is then centripetally forced downward into the second chamber through a 1-inch, 360-degree, peripheral opening between the lower edge of the sidewall and a disk-shaped barrier that's concentrically suspended by 3 equally spaced brackets. It should be noted the lower edge of the first chamber is configured to sealably fit the upper edge of the second chamber, which may simply be a bucket or a trash can. The first chamber functions to separate and efficiently remove the debris from the airflow while the second chamber functions to collect the debris. The first chamber is low-profile so it is less prone to tip over than previous dust collectors.

With an effective Dust Collector (Debris Separator) such as this, the vacuum's filter remains unclogged for longer periods and the vacuum itself runs efficiently longer. This saves the user time, money and frustration and also saves our landfills of superfluous waste (the shop-vac filters). "

So what do you think? It looks much lower height / the lid/ and much easier to make than DIY cyclone. I have to test this one and sooner the better. Anyone got a barbecue that needs replacing? :-)

25-09-2016, 11:32 AM
Great find, that looks really interesting!
There is some good info in the patent images at http://www.google.co.uk/patents/US8337580
(didn't want to post 'em as unsure of copyright, but they are available to download from above link)
Although it's patented for commercial applications, from the comments on the video, the designer seems to encourage homemade versions.

I'm pretty sure it works in the same broad manner as other cyclonic dust extractors, but with the addition of the dome lid & separating plate which appears to increase it's dust collecting efficiency.
Heres how i think it works. (Could be way wrong :witless: )
The shop vac creates a negative pressure in the dust collect collector this 'sucks' dust in throught the inlet, the rapidly moving dust then wants to travel in a straight line but cannot because of the circular shape of the lid.
it is forced to move in a circular motion around the lid. from the point of view of the dust it has a massive centrifugal force acting outwards pressing it against the inner surface of the lid. because the lid is dome shaped this also forces the dust downwards to drop
through the gap around the edge of the plate, into the bin. (Gravity gives a very small help as well, but it's tiny for very fine dust). presumably the plate that separates the lid from the lower bin helps to stop dust already in the lower bin from getting back up in to the upper chamber and into the shop vac.

Centrifugal force is the outward, so called 'fictitious force', that is 'felt' by rotating objects, in this case the dust.
However if you look at it from the bins point of view, it is exerting an inward, centripetal force, forcing the dust to travel in a circle around the lid.
So either Centrifugal or Centripital force can be used to explain it. They are very different, but also very closely linked. (They both arise from objects moving in a curved path.)

Been a long time (years!) since my last post. Arrived and asked a lot of questions then disappeared! :thumbdown:
Just finishing off my Shed/Workshop & hopefully will be posting a real build soon, and also very keen to try and have a go at making one of these too. :thumsup:


25-09-2016, 12:23 PM
It says centripetal forces, not centrifugal. I still dont get how that works though?

Centrifugal is an imaginary force used to explain behaviour, Centripetal is a real force, he may still not get the Physics though as Centrifugal and Centripetal are equal and opposite forces despite one being imaginary ;-)

Boyan Silyavski
25-09-2016, 12:26 PM
Ok, after reading the patent i see now exactly how it functions. The idea is great. The separating plate is the detail that will stop the miniature dust from entering the outlet. I cant wait to make myself one lid.