Vacuum cleaner
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United States of America Patent
Stats
-
Jul 22, 1986
Grant Date -
N/A
app pub date -
Sep 28, 1984
filing date -
Feb 8, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Vacuum cleaner for use in industry and household comprising a housing and an electric motor driving the blower generating the working vacuum, and optional maneuvering means for moving a suction nozzle over the material to be cleaned. There is provided in the area of the channel passed by the dust and dirt particles drawn in, an optical sensor comprising a light transmitter and a coacting light receiver so that the quantity of the dust and dirt particles drawn in at any time is detected. After comparison of the value so determined with a given threshold value, either a visual and/or an acoustic signal are obtained and/or a power variation of the electric motor driving the blower is effected.
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