Oral cavity washing device
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United States of America Patent
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Aug 22, 2023
Grant Date -
Jul 23, 2020
app pub date -
Jan 16, 2020
filing date -
Jan 21, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
An oral cavity washing device includes a nozzle and a pump that supplies a liquid to the nozzle. The nozzle has a nozzle flow passage and a reduced part that is disposed in an intermediate part of the nozzle flow passage and that is smaller in cross-sectional area than a rest of the nozzle flow passage. A first flow passage and a second flow passage that are in parallel to each other are disposed between the nozzle and the pump. The first flow passage has a first valve that causes the first flow passage to be opened only when the pump sucks the liquid. The second flow passage has a second valve that causes the second flow passage to be opened only during discharge performed by the pump.
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Family
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