The Advanced Robotic Vehicles
LL1 ROV cleans windows. Not just any windows. It scales the I.M. Pei
at the Louvre, using suction to hold itself to the glass as it
cleans the surface with a squeegee and rotating brush. A Seattle
Times story has the details. Also check out the ARVI M50 and M100 autocrawler ROVs
which can clean and wax your airliner.
No one probably cares but... Actually the force of suction doesn't exist
(or so I've been told), but rather it's the force of atmospheric
pressure that holds the robot onto the wall. So the bigger the
so-called suction plate the more surface area there is for atmospheric
pressure to hold the robot onto the wall. That's why people are blown
out of a spaceship instead of being sucked out of a spaceship. So, FYI,
this robot would probably not work in the pressureless so-called vacuum
of space. However, I'll bet cleaning these windows without the aid of
this robot would really suck.