Brushhead replacement indicator system for power toothbrushes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 18, 2004
Grant Date -
N/A
app pub date -
May 9, 2000
filing date -
May 9, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for determining when the brushhead portion of a power toothbrush should be replaced. The system includes a piezoelectric transducer for detecting oscillations of the brushhead. The piezoelectric transducer produces an output signal which is used to drive a counter which accumulates the total number of such oscillations. When the total number of oscillations reaches a preselected number, which is representative of typical use of the toothbrush for a predetermined amount of time, e.g. six months, a signal is produced which drives an alarm indicator, the action of which is recognizable by the user of the toothbrush.
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Family
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