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Method and apparatus for brushing teeth with cyclically rotating brush strokes

  • US 5,120,225 A
  • Filed: 05/01/1991
  • Issued: 06/09/1992
  • Est. Priority Date: 05/01/1991
  • Status: Expired due to Term
First Claim
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1. A toothbrush comprising:

  • a handle elongated in a longitudinal dimension;

    a brush head having a first surface;

    a plurality of positionally rotatable brush bristles secured to and extending generally perpendicularly from said first surface;

    means securing said handle to said brush head for permitting longitudinal movement of said handle relative to said brush head;

    motion conversion means responsive to reciprocating motion of said handle along said longitudinal dimension relative to said brush head for rotating said plurality of rotatable brush bristles about an axis perpendicular to said first surface; and

    a plurality of positionally fixed brush bristles extending generally perpendicularly from said first surface for engaging tooth surfaces to oppose longitudinal movement of said brush head along with said handle in response to longitudinal reciprocation of said handle.

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