| 摘要 |
<P>PROBLEM TO BE SOLVED: To dispense with large operational force in a final step of a content discharge operation in a pressure accumulation type pump mechanism, to prevent a content from getting stuck, and to make the discharged content cut sharp. <P>SOLUTION: This pressure accumulation type pump mechanism is provided with an exhaust pressure valve (inner vertical groove-like part 4d, circular bulged part 6a) for releasing pressures of storage space areas A, B with downstream valves 3f, 4a brought into an open state, to a side of an injecting horizontal hole part 2b. in the final step of the content discharge operation. The exhaust pressure valve is brought into an open state to bring the downstream valves into closed states, before an operation part 1 reaches a lower dead point. Then, volumes of the storage space areas A, B are reduced and the pressures are increased, during a period until the operation part 1 reaches the lower dead point integrally with valve action moving members 4, 5, and the content in each storage space area thereby flows out from the horizontal hole part 2b via the exhaust pressure valve of open state. A residual content in the vicinity of the horizontal hole part 2b is sucked in by a backsuction action, when the operation part 1 is restored. <P>COPYRIGHT: (C)2012,JPO&INPIT |
