| 摘要 |
PURPOSE: To prevent stress on the mechanism of a pump even when a push- member is in a blocking position, by disposing a freely-slidable sealing member between the smooth end of a piston and the push-member. CONSTITUTION: A push-member 3 is disconnected from the piston 2 in the upper positions of ramps 10a and 10b and blocked, and freely comes into contact with the head of the piston 2 and depresses the piston 2. Also, a freely-slidable sealing member is disposed between the smooth end of the piston 2 and the push-member 3. When a ring 9 is fitted in a cap 6, a desired orientation of a nozzle is chosen. Thus, even when the push-member 3 is in a blocking position, stress is not applied to the mechanism of the pump. |
