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External vacuum sealers involve a bag being attached to the vacuum-sealing machine externally. The machine will remove the air and seal the bag, which is all done outside the machine. A heat sealer is often used to seal the pack. Typically these units use a dry piston vacuum pump which is often considered a "maintenance-free" pump.
Lightweight hand-held vacuum cleaners, either powered from rechargeable batteries or mains power, are also popular for cleaning up smaller spills. Frequently seen examples include the Black & Decker DustBuster , [ 26 ] which was introduced in 1979, [ 27 ] and numerous handheld models by Dirt Devil , which were first introduced in 1984. [ 28 ]
The manual vacuum cleaner was a type of non-electric vacuum cleaner, using suction to remove dirt from carpets, being powered by human muscle, similar in use to a manual lawn mower. Its invention is dated to the second half of the 19th century, when patents were granted to inventors in the United States, Britain, France, and elsewhere.
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.
By this time, it is estimated that over 100 million "Dustbusters" had been sold. "Dustbuster" has become a genericized trademark for a handheld vacuum cleaner in some parts of the world, due to its success as a design and worldwide recognition. In 2009, the original 1979 Dustbuster was selected and published as a detailed "Catalyst" case study ...
The hose is attached to the suction hose of a vacuum cleaner or a dedicated Flowbee "Mini Vac". One or more of several spacers is fitted onto the cutting head depending on the length of hair desired. The vacuum is turned on, the cutting head powered up, and the cutting head placed over the head.
Lunar water – Although the presence of water ice on the Moon has been conjectured by various scientists since the 1960s, inconclusive evidence of free water ice had also been identified. The first incontrovertible evidence of water on the Moon was provided by the payload Chace carried by the Moon Impact Probe released by Chandrayaan-1 in 2009 ...
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
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