Charging coil core insert for electric toothbrushes
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United States of America Patent
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-
Aug 18, 1998
Grant Date -
N/A
app pub date -
Aug 30, 1996
filing date -
Aug 30, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A coil insert for use with a secondary coil portion of a charging system for an electric toothbrush. The secondary coil is positioned within the handle of the toothbrush. The insert includes a first portion which is configured to fit in the central opening of the secondary coil and a base portion which extends out from the secondary coil. The insert has enough weight, approximately one ounce, to significantly dampen the vibrational effects caused by operation of the toothbrush. The steel peen is sufficiently small so as to not absorb any energy from the charging coil during operation of the charging system and to increase coupling efficiency between the primary and secondary charging coils.
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