| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-quantity metering pump using the air pressure of an air pump and a check valve for discharging liquid pushed up to a high level. SOLUTION: A hole is made in a bottom plate of a small pump chamber to form a water intake, and the check valve is mounted thereon and an air intake nozzle having a small hole and a pumping nozzle are mounted on a ceiling portion thereof. With air pressure pushing water up, the check valve at a bottom portion prevents the back-flow thereof. Thus, an equal quantity of liquid per minute can be pushed up to the high level. COPYRIGHT: (C)2004,JPO
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