Charging coil core insert for electric toothbrushes

Details Charging coil core insert for electric toothbrushes Charging coil core insert for electric toothbrushes

1996-08-30

1998-08-18

Gellner, Michael L.

Inductor devices

Core

336 83, 336DIG2, H01F 2702, H01F 2724

Patent

active

057963258

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.

REFERENCES:
patent: 3277358 (1966-10-01), Nicholl
patent: 3418552 (1968-12-01), Holmes
patent: 5150492 (1992-09-01), Suroff
patent: 5165131 (1992-11-01), Staar

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