The part which attaches to the balloon is a cylinder with a wider flat base.
Air can move freely through this, allowing the balloon to be inflated - when inflated, the second part of the device is attached. This is a circle designed so that the escaping air spins it very quickly - the surface of it is covered in a soft material which is gently pressed against the surface of the glass to clean it.
The cleaners would cost very little to produce and could be given away by the handful - also at request, can contain a comedy whistle.
After all - who doesn't carry a balloon around with them at all times?
-- fridge duck, Feb 21 2006

Well, these days many folks carry a balloon with them at all times, but you're supposed to save it to inflate in the company of a close friend.

Not certain I'd want a comedy whistle attached to it.
-- normzone, Feb 21 2006


The difference between this and a compressed air powered forklift is only one of scale.

Those forklifts are surprising; they have what looks like a swappable keg of compressed air, and then they actually drive around.

I think the idea is a zero emissions vehicle for warehouses.
-- beanangel, Mar 30 2019


// Well, these days many folks carry a balloon with them at all times, but you're supposed to save it to inflate in the company of a close friend. //

Unfortunately, many folks carry them in ways that damage them, so they can't be relied on to stay inflated.
-- notexactly, Mar 31 2019



random, halfbakery