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US 7,008,225 B2Granted
Tooth brusher
AssigneeRicoh Elemex Corporation
InventorsKazumasa Ito, Nobuhiro Takeda
Life of this patent
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AssigneeRicoh Elemex Corporation
InventorsKazumasa Ito, Nobuhiro Takeda
Estimating the term…
A safe brushing is realized without sticking the gum if the bristle tips are once inserted in a pocket of a tooth by using a system having a brush of which the bristle tips automatically vibrate in a direction at right angles with the direction of length of the bristles. A brush lever 5 having a brush 4 is swingingly supported in the nozzle 1, a flow passage 3 leading to a blow-out port 1a at an end of a nozzle 1 is partly bent, and a resilient member 7 is provided at the bent portion to urge the brush lever 5 in a direction opposite to the direction of flow of water, so that the brush lever 5 oscillates reciprocally due to the resilient force produced by the resilient member 7 and the pressure of water flow, causing the bristle tips of the brush 4 to oscillate in a direction at right angles with the direction of length of the bristles outside the nozzle 1.
A tooth-brushing device for conducting the brushing with a brush protruded beyond a nozzle while blowing out water from a blow-out port of the nozzle, wherein a brush lever having the brush is swingingly supported in the nozzle, a flow passage leading to the blow-out port is partly bent, a resilient member is provided at the bent portion to urge the brush lever in a direction opposite to the direction of flow of water, so that the brush lever oscillates reciprocally due to the resilient force produced by the resilient member and the pressure of water flow.
Dependencies are inferred from the claim text.