PUMPING ASSEMBLY, PISTON PUMP AND ORAL IRRIGATOR
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United States of America Patent
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Issued Date -
Feb 16, 2023
app pub date -
Apr 28, 2022
filing date -
Apr 28, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure relates to a pumping assembly, a piston pump and an oral irrigator. The pumping assembly includes: a cylinder, cavities providing therein with at least two cavities with different inner diameters; a piston mechanism successively extending through the at least two cavities, the piston mechanism being in slidable cooperation with walls of the cavities, and a gap being formed between a sidewall of part of the piston mechanism and the walls of the cavities; and a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move.
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