| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid force-feed device that has the reduced number of component items and a simple structure. SOLUTION: A float 3 is arranged in a sealed container 2 having a working fluid introducing opening 11, a working fluid discharge opening 13, a force-feed liquid inflow opening 16, and a force-feed liquid discharge opening 17. In a liquid force-feed device which switches opening/closing of a selector valve 4 comprising an exhaust valve 21 and an air supply valve 20 by snap-moving a power transmission shaft 34 according to lifting up/down of the float, first flows in liquid from the force-feed liquid inflow opening by opening the exhaust valve to open the working fluid discharge opening and by closing the air supply valve to close force-feed liquid inflow opening, and second, force-feeds the liquid accumulated in the sealed container from the force-feed liquid discharge opening by closing the exhaust valve to close the working fluid discharge opening and by opening the air supply valve to open force-feed liquid inflow opening, an exhaust valve element 33 is directly connected to the power transmission shaft, and the exhaust valve element opens an air supply valve element 31.
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