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Power-driven toothbrush

  • US 6,691,363 B2
  • Filed: 10/26/2001
  • Issued: 02/17/2004
  • Est. Priority Date: 10/26/2000
  • Status: Active Grant
First Claim
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1. A power-driven toothbrush comprising a brush head mounted on a brush handle for vibratory movement relative thereto, a vibration transmission arm extending between said handle and said head, the arm having a longitudinal extent and having a predetermined frequency of resonance in a vibrational mode orthogonal to its longitudinal extent, and a vibration actuator located within the handle, said vibration transmitting arm including a magnet located within said handle and the actuator including a solenoid adjacent said magnet and means for supplying AC current to the solenoid at a frequency which is the same as the frequency of resonance of the vibration transmitting arm.

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