Dust indication system for vacuum cleaner
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Nov 27, 1996
filing date -
Nov 27, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vacuum cleaner includes an optical dust sensor for detecting a quantity of dust which sensor is provided at a predetermined position of a suction path for sucking air by a suction force of the vacuum cleaner, whereby an output signal is supplied to a display device so that a display corresponding to the quantity of the sucked dust, which signal is output from the optical dust sensor and is varied in a stageless manner corresponding to the quantity of the dust.
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