1999, "Steve Wiseman", Vacuum Cleaners (discussion on Internet newsgroup cam.misc)It's all pretty simple. If you want to get hairs out of a carpet, you need a whirling brushbar of death. No amount of suck will do it.
2005, Popular Mechanics (volume 182, number 3, March 2005)A string had caught in the brushbar and shut down the belt drive. This was quickly fixed and we hosed up the rest of the filth.
2005, Eureka: Innovative Engineering Design‎Innovations include placing the main motor inside the ball, using a second motor to drive the brushbar through gears, and a mechanism to drop down wheels...
