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2. Roomba - Wikipedia

   en.wikipedia.org/wiki/Roomba

   An undriven swivel caster is located at the front of most models and the back of the D-shaped S series. It is not used for steering, but it is used as an additional sensor. It has a rotary encoder as well. The caster's wheel is half black and half white, and optical sensors detect the change in color as it rotates.

3. Electrolux Trilobite - Wikipedia

   en.wikipedia.org/wiki/Electrolux_Trilobite

   The Electrolux Trilobite is a robotic vacuum cleaner manufactured by the Swedish corporation ... It features a number of casters in addition to the drive wheels. The ...

4. Aerus - Wikipedia

   en.wikipedia.org/wiki/Aerus

   In 1952, the company debuted the Electrolux Model LX, the first vacuum that would know when it is full and also the first vacuum to use a self-sealing bag. [5] That same style bag is still in use on some of the new Aerus-Lux model canister vacuums today. This machine would lay the foundation for every other North American Electrolux vacuum ...

5. Caster - Wikipedia

   en.wikipedia.org/wiki/Caster

   However, the larger the diameter of a caster wheel, the higher the caster support arm must be. Either the base of a low-hanging object must be lifted higher above the wheels, or the casters must hang out to the sides straddling the low-hanging supported object. While rotating around the vertical shaft, swivel caster wheels sweep out a space.

6. This car vacuum has over 168,000 5-star fans and is down to ...

   www.aol.com/lifestyle/this-car-vacuum-has-over...

   Why is this a good deal? 💰. When a product has over 168,000 perfect ratings, paying full price seems fair.But this vacuum is doubly discounted, making it a no-brainer. Use our exclusive code ...

7. Vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Vacuum_cleaner

   Introduced in 1954, The Hoover Company's Constellation was of the cylinder type and lacked wheels. Instead the vacuum cleaner floated on its exhaust, operating as a hovercraft, although that was not true of the earliest models, which had a rotating hose, the intention being that the user would place the unit in the center of the room, and work ...