| 摘要 |
PURPOSE: To provide a pump dispenser which by virtue of a simple constitution prevents the solution inside from escaping at the time of a lock and when suction is finished and also prevents the liquid from dripping from the nozzle when discharge is finished. CONSTITUTION: A pump chamber 2 is fitted inside with a vertically movable valve shaft 20. While the valve 23 of a suction valve at the lower end of the valve shaft 20 is being held in contact with the valve seat 72 of the suction valve 7, the position of the upper end of the valve shaft 20 is set higher than the valve seat 92 of a discharge valve 9 at the time of a lock, this setting enabling the valve 93 of the discharge valve 9 to be lifted from the valve seat 92 by the top end of the valve shaft 20. Furthermore, the valve shaft 20 has a sealing valve 22 which closes a passageway 8 by tight contact with a first sealing seat 51 at the time of a lock and by tight contact with a second sealing seat 52 when repositioned after suction is finished. |
