ScrubberVac AKA e.bot (2000) by Servus Robots (Servus Robots ultimately became Intellibot). ScrubberVac can be operated in either an automatic or manual mode. The battery-powered sweeper unit is designed to sweep both carpet and hard floors, and can automatically navigate between areas. The scrubber unit cleans up to 13,000 square feet per hour, for up to 60,000 square feet per battery charge. It cleans large rectangular areas following a Zamboni pattern, originally devised by Frank Zamboni in 1947, as a method for re-surfacing ice rinks. It's a satisfying way of covering a floor area without introducing tight turns, similar to the shape of a paper-clip.
In the first photo above, a parade of ScrubberVacs is led through a warehouse by a LISA robot in preparation for deployment to West Point Military Academy. The pre-loved ScrubberVac in the second photo is in a sorry state, looking like something you'd buy from a dodgy Jawa, but it's the clearest photo I can find.
"This is Intellibot's first marketing video of the 6th Generation Robokent floor cleaning robot with historical and educational annotations by its founder and robot evangelist, Buck Ward. This project was originally developed under Transitions Research Corporation direction in 1987 with the introduction of Generation 1. Versions 1 through 5 were sold by Electrolux through its Robokent brand." – Nexus AMR, The First Intellibot Marketing Video Year 2000.
