Half a croissant, on a plate, with a sign in front of it saying '50c'
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Hover Hoover

It blows and sucks
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There is probably a nifty synergy between a drone downdraft and some bernoulli dust sucking principle, not to mention vortices. Personally I like a bag, but that could be optional.

Could have a recharging home on an upper-wall mounted extended speaker bar that plays Ride of the Valkyries.

Directional nozzle for shelves, walls and corners - all automated.

Think of it like a 3D Roomba but without the cat on top.

bigsleep, Sep 21 2016

Flymo https://en.wikipedia.org/wiki/Flymo
What this idea's title reminded me of: a hovercraft lawnmower. Via [bs0u0155] on Electrically Actuated Parallel Quarter Wheel. [notexactly, Sep 22 2016]

Hoover Constellation https://www.youtube...watch?v=-O82VA87g4o
Only £18 [mitxela, Sep 26 2016]

[link]






       Yeah, I don't think cat's will ride it, but they may find them worthy of attack.
normzone, Sep 21 2016
  

       If it's gonna hover, then the total amount of downward air must exceed the upward air. Which means it's not going to be a net vacuum. That's means likely to scatter more dust than it collects. Now, you might be able to do something with fancy fast downdraft at the edges angled inwards to try and get in underneath the dust into a relatively high pressure volume. The advantage with the high pressure volume is the finer dust will float around in it a bit easier. Still you'd need details on that sort of thing.
bs0u0155, Sep 21 2016
  

       Or maglev
hippo, Sep 22 2016
  

       Well, a pulse-jet would seem to fit the bill, as the hot exhaust has more thrust than the inlet suction, or it wouldn't move.   

       I'm thinking long pipe attached to the domestic gas outlet for fuel.   

       Might make you tad unpopular with the neighbours.
not_morrison_rm, Sep 22 2016
  

       //Or nanotechnology.//   

       I've never understood this global obsession with nanotechnology. I once tried to tech my grandmother how to use the TV remote, and it was a hopeless task, so I don't see a lot of future in it.
MaxwellBuchanan, Sep 22 2016
  

       // I once tried to tech my grandmother how to use the TV remote//   

       You can get around such difficulties with a combination of simplification and motivation. Exchange the meaningless symbols "1,2,3 & 4" with "Morse, Snooker, Coronation St & Countdown" and the problem essentially solves itself.
bs0u0155, Sep 22 2016
  

       // without the cat on top. // // pulse-jet would seem to fit //   

       Could it be a pulse-jet, but with the cat inside ? A sort of Schrödinger Roomba, but with an improved element of certainty ?
8th of 7, Sep 22 2016
  

       Nan O'Tech, the matriarchial grandmother of the old Irish O'Tech clan, could help clean your floor but she's not as fast on her feet as she used to be.
hippo, Sep 23 2016
  

       //If it's gonna hover, then the total amount of downward air must exceed the upward air.//   

       Well obviously. Drones have quite a surplus of lifting power especially racing drones, so scavanging 10% is not a big deal, and bernoulli vacuums aren't that efficient anyway so maybe very appropriate for this idea.   

       The directional nozzle or hose could change the thrust vectoring quite a bit, but luckily drone control software is pretty good to get drones to keep station regardless of gusts etc.   

       Maybe the idea would sell better if a lightweight cover resembling an elephant was included. The result would be a flying elephant extending its trunk around objects on shelves.
bigsleep, Sep 23 2016
  

       a bouncing elephant would likely work well for people and physics.   

       also, inevitably, because vacuums are only -14.7 psi, it could have 40 to 100 psi air jets to stir up dust right under the trunk, making it better than other vacuums (old idea, pressure airstreams near a vacuum cleaner)
beanangel, Sep 24 2016
  

       //old idea, pressure airstreams near a vacuum cleaner//   

       Thanks for remembering my old idea.
bigsleep, Sep 25 2016
  

       // better than other vacuums //   

       Can it suck up cat fur* ?   

       *Note that said cat fur would still actually be attached to the cat.
8th of 7, Sep 25 2016
  
      
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