| 摘要 |
PROBLEM TO BE SOLVED: To provide elongated opening time of a closing body regardless of the pressure of a medium space and/or a position of the operating part in a discharge device. SOLUTION: This discharge device 1 has a discharge valve 20 which opens in an operating stroke in a plunger chamber 13, and is made to keep the opening in a fixed time by a delay means 30 after it opens during successive return stroke so as to secure complete ventilation or filling of the plunger chamber 13 as enough as possible. At the end of delayed time, a closing body is held in the releasing position is positioned by frictional surface areas 37, 38 and released to automatically jumpily return to a closing position. After ventilation, the effect of the delay means 30 is diminished, so that in normal motion, the pressure only according to the opening/closing of the discharge valve 20 is substantially provided. |
