A floor scrubber is a cleaning device.
The scrubber resembles a vacuum cleaner with a rotary head that cleans the floor.
Scooby-Doo! and the Samurai Sword
Scooby-Doo! Curse of the Lake Monster continuity
When Scooby-Doo felt left when the newly christened Mystery Incorporated seemed to be getting along without him, he walked away slowly, not taking notice of the wet floor. He slipped and caught on a floor scrubber.