Electric toothbrush
First Claim
1. Electric toothbrush comprising a housed motor, which motor drives a brushing head about an oscillation axis, said head comprising bristles arranged in bristle tufts, said toothbrush comprising a longitudinal axis, said brush head comprising a transverse axis perpendicular to said longitudinal axis and passing through said longitudinal axis at said oscillation axis, wherein at least 50% of the bristle tufts within about 45°
- either side of the transverse axis of the brush head when in a rest position have an average length of from about 106 to about 140% that of the average length of the other bristle tufts on the brush head located outside this area.
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Accused Products
Abstract
Electric toothbrush comprising a housed motor, which motor drives a brushing head about an oscillation axis, said head comprising bristles arranged in bristle tufts, said toothbrush comprising a longitudinal axis, said brush head comprising a transverse axis perpendicular to said longitudinal axis and passing through said longitudinal axis at said oscillation axis, characterised in that at least 50% of the bristle tufts within 45° either side of the transverse axis of the brush head when in a rest position have an average length of from 106 to 140% that of the average length of the other bristle tufts on the brush head located outside this area. The invention also provides a replaceable head therefor.
34 Citations
6 Claims
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1. Electric toothbrush comprising a housed motor, which motor drives a brushing head about an oscillation axis, said head comprising bristles arranged in bristle tufts, said toothbrush comprising a longitudinal axis, said brush head comprising a transverse axis perpendicular to said longitudinal axis and passing through said longitudinal axis at said oscillation axis, wherein at least 50% of the bristle tufts within about 45°
- either side of the transverse axis of the brush head when in a rest position have an average length of from about 106 to about 140% that of the average length of the other bristle tufts on the brush head located outside this area.
- View Dependent Claims (2, 3, 4, 5)
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6. Replaceable head for an electric toothbrush, which head oscillates about an oscillation axis, said head comprising bristles arranged in bristle tufts and having a longitudinal axis, said brush head comprising a transverse axis perpendicular to said longitudinal axis and passing through said longitudinal axis at said oscillation axis, wherein at least about 50% of the bristle tufts within about 45°
- either side of the transverse axis of the brush head when in a rest position have an average length of from about 106 to about 140% that of the average length of the other bristle tufts on the brush head located outside this area.
Specification