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US 7,120,960 B2Granted
Electric toothbrushes
AssigneeBraun GmbH
InventorsAlexander Hilscher, Hansjörg Reick
Life of this patent
Estimating the term…
Abstract
An electric toothbrush has a brush head which is mounted in a movable manner, and a drive for producing an oscillating operating movement in the brush head. The drive includes a cyclically movable drive part and a follower part. The follower part is biased against the drive part so that the follower part follows the drive part's cyclic drive movement. A sensor determines the brush head's contact pressure by sensing the extent of coupling between the follower part and the drive part, and determining the contact pressure of the brush head based on the extent of coupling.
Claims19
An electric toothbrush comprising:
- a brush head;
- a drive that produces an oscillating motion in the brush head, wherein the drive includes a cyclically movable drive part and a follower part connected to the brush head, and wherein the follower part is movably biased toward the drive part;
- and
- a sensor that senses the contact between the drive part and the follower part.
1 more element
Dependencies are inferred from the claim text.