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US 4,974,278 AGranted
Electric toothbrush
AssigneeGimelli & Co. AG
InventorEdgar Hommann
Life of this patent
Estimating the term…
Abstract
An electric toothbrush has a gear driven by a motor. On the face of the gear is an eccentric pin upon which a sliding member is located. The eccentric pin engages with a socket in a lever which is securely connected to a brush rod. The lever is moved up and down and simultaneously oscillates due to the rotational movement of the eccentric pin so that the brush rod executes a corresponding movement.
Claims19
Electric toothbrush comprising:
- a tooth brush casing;
- a brush rod mounted in the toothbrush casing so as to be rotatably and longitudinally movable;
- a lever fixed to said brush rod, wherein said lever has a socket portion which is provided with a socket having a center axis perpendicular to the longitudinal axis of the brush rod;
- an eccentric cam which communicates with said socket, wherein said eccentric cam has a rotational axis which is perpendicular to the longitudinal axis of the brush rod;
- and
- means for rotating said eccentric cam to cause an oscillatory movement of the lever and the brush rod about the longitudinal axis of the brush rod and a longitudinal movement of the lever and the brush rod along the longitudinal axis of the brush rod.
3 more elements
Dependencies are inferred from the claim text.