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This is a list of vacuum cleaners and robot vacuum cleaner manufacturers. A vacuum cleaner is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors, and optionally from other surfaces as well. The dirt is gathered by either a dustbag or a rigid cartridge, which may be emptied and reused.
The Hoover Company is a home appliance company founded in Ohio, United States, in 1908.It also established a major base in the United Kingdom, where it dominated the electric vacuum cleaner industry during most of the 20th century, to the point where the Hoover brand name became synonymous with vacuum cleaners and vacuuming in the United Kingdom and Ireland.
Bag breakage is an issue that arises with filtered central vacuums. In a portable vacuum, if the filter bag fails, this condition becomes immediately obvious as a cloud of dust and dirt blows into the room. Although it creates a mess, at least the problem can be immediately brought under control by shutting off the appliance.
Materials for use in vacuum are materials that show very low rates of outgassing in vacuum and, where applicable, are tolerant to bake-out temperatures. The requirements grow increasingly stringent with the desired degree of vacuum to be achieved in the vacuum chamber. The materials can produce gas by several mechanisms.
The bag may be disposable, or designed to be cleaned and re-used. Bagless: In non-cyclonic bagless models, the role of the bag is taken by a removable container and a reusable filter, equivalent to a reusable fabric bag. Cyclonic separation: A vacuum cleaner employing this method is also bagless. It causes intake air to be cycled or spun so ...
The first prototype vacuum cleaner, a red and blue machine, brought Dyson little success, as he struggled to find a licensee for his machine in the UK and America. Manufacturing companies such as Hoover did not want to license the design, probably because the vacuum bag market was worth $500M and thus Dyson was a threat to their profits. [14]
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