Vacuum cleaner with dust bag fill detector
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United States of America Patent
Stats
-
Feb 29, 2000
Grant Date -
N/A
app pub date -
Apr 8, 1997
filing date -
Apr 8, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vacuum cleaner with an indicator for indicating when the dust bag for the vacuum cleaner is full. The indicator includes a turbine provided in a suction pipe, so that the turbine causes an amount of electric power to be generated that corresponds to the amount of negative pressure within the suction pipe. As the dust bag begins to fill, the negative pressure in the suction pipe decreases, and the amount of electric power caused by the turbine also decreases. When the amount of electric power caused by the turbine falls below a predetermined value, the indicator display indicates that the bag is full. If the indicator is employed with a dust sensor, the indicator display can be used to show the amount of detected dust until the bag is full and the operation of the sensor is stopped to allow the display to indicate that the bag is full.
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