Grain vacuum - GIF

Grain vacuum.

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Previously:

Combine filling a grain bin - GIF
Conveyor belt from grain harvester - video
Grain bin collapses - GIF
Grain bin collapses and explodes - video
Grain silo explosion - GIF
Grain weevil silo safety robot - GIF
Rice grain sculpture - GIF
Unloading grain from a ship - GIF
Vacuuming spilled grain - GIF

I"m sure that's a screw device...

A similar tool is used by fire departments to rescue people trapped in grain bins. It's more of an auger than a vacuum.

Make that thing 10 times bigger and you might have something useful!