| 摘要 |
PURPOSE:To form a device into such a structure that dispenses with special parts that prevent a plunger from slipping off, by installing a ring for regulating an upper motion limit position of the plunger, in a retainer which presses a diaphragm to a plunger body under pressure. CONSTITUTION:A plunger 43 is slidably fitted in a plunger body 41, and a high pressure chamber 42 is partitioned by a check valve 51, and that a reservoir chamber 57 is formed on the circumference of a projecting part of the plunger 43 by means of a diaphragm 55. A lower end of the diaphragm 55 is forcibly pressed to the plunger body 41 by a retainer 45. On the other hand, this retainer 45 is provided with a ring plate 60 through which an upper motion limit position of the plunger 43 is regulated, with this constitution, the plunger 43 is preventable from slipping off without installing any special parts for this purpose. |
