Vacuum Dave is a future character in the episode Charlie's Time Machine, and a minor character in An Oobi Vacation. Like Bop Bot, Dave was changed into a robot, specifically a vacuum cleaner. It is his job to keep Future Charlie and Max's apartment clean. He is never seen, and all that is heared of him is loud sucking noises. His voice is provided by Buckteeth.
This character isn't seen, but he probably looks like Dave.
Vacuum Dave only appears in Charlie's Time Machine