TOOL FOR A VACUUM CLEANER
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United States of America Patent
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Jul 12, 2017
filing date -
Jul 13, 2016
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Abstract
A vacuum cleaner flexible duct. The flexible duct includes a helical frame and a helical strip. The helical frame includes a plurality of loops arranged about a helical axis and is formed of a rigid material. The helical strip is provided between the loops to seal the frame and is formed of pliable material. The helical strip has indents on an exterior surface of the duct. The helical strip is secured to the loops such that the interior surface of the helical strip is flush with the interior surface of the loops.
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