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US 10,821,480 B2Granted
Brush head and method of operating the brush head
AssigneeFosieborg AB
InventorBertil Eklund
Life of this patent
Estimating the term…
Abstract
The invention relates to a brush head for an electric toothbrush comprising a brush head shaft (20) with two ends, one end (21) with a tuft plate (30) being oscillatable about its centre axis, and one end adapted for detachable connection to a handle of the electric toothbrush, wherein the oscillatable tuft plate comprises at least three tufts (40), each tuft being non-rotatably attached to the tuft plate, wherein each tuft comprises a free end (41) and an end (42) fixedly attached to the oscillatable tuft plate.
Claims14
A brush head for an electric toothbrush comprising:
- a brush head shaft with two ends, one end configured to detachably connect to a handle of the electric toothbrush;
- an oscillatable tuft plate connected to the other end of the brush head;
- and
- exactly four tufts, each tuft non-rotatably attached to the tuft plate and protruding perpendicularly from the tuft plate, wherein each tuft comprises a free end and an end fixedly attached to the tuft plate, wherein each tuft of the tufts comprises mono filaments of varying length, wherein the varying lengths of the mono filaments form a teeth brushing surface of each tuft having a rotationally symmetrical cambered rounded outline, and wherein each tuft has a diameter in the range of about 3-4 mm;
- and
- wherein each tuft is positioned at a radial distance from the centre axis of the tuft plate so that the tufts, in oscillation, collectively form a hemispheric-shaped bushing interface that includes a cavity devoid of tufts located at the centre axis of the tuft plate, the cavity devoid of tufts being shaped and sized to receive a tooth so that a center of the brushing interface is contactless and non-abrasive with the received tooth.
3 more elements
Dependencies are inferred from the claim text.