Acoustic toothbrush
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United States of America Patent
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Jul 13, 2004
Grant Date -
Jul 18, 2002
app pub date -
Jan 14, 2002
filing date -
Jan 12, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electric toothbrush having a detachable brush head assembly including a driven shaft that is driven by a driveshaft disposed with in a housing. The driveshaft is part of or secured to a torsion bar that supports an armature including a pair of magnets. An electric coil receives an alternating flow of current at a predetermined frequency that causes the magnets to be alternately attracted to the coil and causes the torsion bar to oscillate in an oscillatory rotary motion.
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Family
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