Vacuum Cleaner and Filter Bag Insert for a Vacuum Cleaner
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United States of America Patent
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Issued Date -
Oct 6, 2011
app pub date -
Dec 7, 2009
filing date -
Dec 8, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to the field of vacuum cleaners and relates in particular to domestic or commercial cleaners which are provided with a bin (or vacuum chamber), rather than a filter bag, to collect air-entrained detritus. According to one aspect of the invention there is provided an insert (20,100) for converting a vacuum cleaner (10) of the aforementioned type so as to make the cleaner capable of operating in a mode in which air-entrained detritus is collected in a filter bag (29,109) located in the vacuum chamber (27), the insert comprising an enclosure (20,21,22,38,100,101) in which the filter bag may be accommodated, which enclosure comprises structural constraint means (21,22,23,24,38,103) which limits vacuum induced expansion of at least a region of the bag and maintains an airflow gap (28,108) between the filter bag outer surface and a vacuum chamber inner wall. The constraint means may in one embodiment be a plurality of inward facing spacer ribs (103). In another the constraint means may be a perforated drum (21).
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