| 摘要 |
PROBLEM TO BE SOLVED: To provide a jetting pump apparatus capable of preventing the leakage of the content in a vessel through an air opening of the jetting pump apparatus to the outside even if a pump type jetting unit is left as it falls sideways. SOLUTION: A push button is pushed down with a hand in use and a stem 14 moves downward to push a piston 12 into a cylinder 10 against a spring 11. In such a case, a seal valve 18 moves downward by friction with the downward movement of the stem 14 and slides along the inner peripheral surface of the cylinder 10. The lower end of a outer peripheral seal part 19 is butted to a projecting part 27 of the inner peripheral surface of the cylinder 10 and the upper part is put into a groove part 28 of the inner peripheral surface of the cylinder 10 and the seal valve 18 is stopped. As a result, the seal valve 18 is opened and the inside of the vessel communicates with the outside air through the air opening 20. When the piston is returned, the seal valve 18 moves upward to plug the air opening to cut-off the communication of the inside of the vessel with the outside air. COPYRIGHT: (C)2005,JPO&NCIPI
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