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Brush section for an electric toothbrush

  • US 5,652,990 A
  • Filed: 11/15/1994
  • Issued: 08/05/1997
  • Est. Priority Date: 03/17/1993
  • Status: Expired due to Term
First Claim
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1. A brush section for an electric toothbrush with a handle section having an electric motor, wherein the brush section comprises a first end adapted to be connected with the handle section, a second end remote from the handle section, and an essentially circular cylindrical rotary bristle supporting structure on the second end, the bristle supporting structure including an end surface on which bristles are arranged in the form of tufts, wherein the bristle supporting structure has an axis of rotation at an approximately right angle to a longitudinal center line of the brush section and is adapted to be driven by a coupling to the electric motor in an alternating rotary motion, wherein a first group of the tufts of bristles are serially located in position on a diameter, and a second group of the tufts are arranged on an outer circular ring of the bristle supporting structure, wherein the first group of tufts of bristles serially located on the diameter includes four tufts located inside the outer circular ring.

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