Patent ID: 8813292

Claim:
A brush head for an electric toothbrush comprising: a bristle support having mounting means for movable mounting of the bristle support; and a plurality of bristle tufts arranged on the bristle support in at least one outer ring and one middle ring, the middle ring being nested within the outer ring and having a central area; wherein the plurality of bristle tufts are attached to the bristle support at points of attachment such that there is a continuous, annular bristle free zone located between the outer ring and the middle ring and between the middle ring and the central area; wherein the outer ring includes outer bristle tufts having an elongated tuft cross-section, which outer bristle tufts are mounted on opposing sides of the outer ring; the middle ring includes at least four middle bristle tufts that each have a cross-section that is smaller than the cross-section of the outer bristle tufts and a central area including at least one bristled section that consists of two center bristle tufts nested within the middle ring and having a cross-section larger than the cross-section of the middle bristle tufts, the center bristle tufts each having an elongated, substantially kidney-shaped form that complement each other so that the bristled section of the central area has an approximately circular, oval or elliptical structure.