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US 8,418,302 B1Granted
Tooth brush motor
OwnerChi Ming Sueninventor
Life of this patent
Estimating the term…
Abstract
A motorized toothbrush includes a shaft, a tooth brush mounted to a distal end of the shaft, a coil mounted to and surrounding the shaft, a first magnet adjacent to a periphery of the coil, and a second magnet adjacent to the periphery of the coil and on an opposite side of the coil with respect to the first magnet. Passing a current through the coil causes the shaft to rotate alternately clockwise and counterclockwise.
Claims4
A motorized toothbrush comprising:
- a shaft;
- a tooth brush mounted to a distal end of the shaft;
- a coil mounted to and surrounding the shaft;
- a first magnet adjacent to a periphery of the coil;
- and
- a second magnet adjacent to the periphery of the coil and on an opposite side of the coil with respect to the first magnet;
- wherein passing a current through the coil causes the shaft and the coil mounted thereto to rotate alternately clockwise and counterclockwise around the axis of the shaft;
- wherein the first magnet adjacent to the periphery of the coil is configured to at least partially rotate alternately clockwise and counterclockwise without being coupled to the coil rotation;
- wherein the second magnet adjacent the periphery of the coil is configured to at least partially rotate alternately clockwise and counterclockwise without being coupled to the coil rotation;
- the first magnet comprises a first N-S portion nearer the coil and a first S-N portion further away from the coil;
- the second magnet comprises a second N-S portion nearer the coil and a second S-N portion further away from the coil;
- wherein the first N-S portion is opposite the second N-S portion;
- and
- wherein the first S-N portion is opposite the second S-N portion.
11 more elements
Dependencies are inferred from the claim text.