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Motorized toothbrush tip having inner and other heads counter around different axes

  • US 20110016647A1
  • Filed: 07/22/2009
  • Published: 01/27/2011
  • Est. Priority Date: 07/22/2009
  • Status: Active Grant
First Claim
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1. A brush tip for a motorized toothbrush, comprising:

  • a housing having first and second openings, defining first and second axes of rotation, respectively, and a cavity;

    a first brush head supported by said housing in said first opening for rotation about said first axis of rotation;

    a second brush head supported by said housing in said second opening for rotation about said second axis of rotation, said second brush head encircling said first brush head;

    means for counter rotating said first and second brush heads around said first and second axes of rotation, respectively; and

    an elongated shaft supported by said housing in said cavity for rotation about a shaft axis, engaging said second brush head to drive said first and second brush heads.

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