Floor detector for vacuum cleaners
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United States of America Patent
Stats
-
Dec 18, 1990
Grant Date -
N/A
app pub date -
Aug 14, 1989
filing date -
Aug 15, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A floor detector for a power brush of a vacuum cleaner comprises a lift sensor S1 and a floor sensor S2. The lift sensor S1 has a movable member which yieldably displaces when the power brush is placed on a relatively soft floor while the floor sensor S2 has a movable member which yieldably displaces when the power brush is placed on a relatively hard floor. Each of movable members is detected its movement by a corresponding light sensor which provides a signal representative of the movements. The signals from the light sensors are sent to a control circuit which controls a drive source for driving the brush member of the power brush. In this manner, the brush member is rotated when the power brush is placed on a relatively soft floor such as a carpeted floor and is not rotated when the power brush is placed on a relatively hard, flat, smooth floor.
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