FULL-PLASTIC LIQUID PUMP
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United States of America Patent
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Issued Date -
Aug 22, 2024
app pub date -
Jul 4, 2023
filing date -
Feb 20, 2023
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Abstract
A full-plastic liquid pump includes a pump body, a pump head, a piston, a spring, a threaded cover, a one-way valve, and a suction pipe. Two ends of the pump head are respectively provided with a liquid outlet and a sliding pressing rod. The middle portion of the slidable pressing rod movably passes through a cover hole formed of the threaded cover. A piston is connected with the inner wall of the pump body to divide the inner space of the pump body into an air pressure cavity and a liquid storage cavity. A vent hole is formed in the upper portion of the pump body. An axial through hole is formed in the center of the piston. A lower end of the spring is fixed in the liquid storage cavity. The one-way valve is fixed in the liquid storage cavity corresponding to the suction pipe.
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