| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pump dispenser which can form a gap between a stem and a piston surely by an idling operation even if the stem seizes the piston, and can suck in a liquid from a vessel into a cylinder. <P>SOLUTION: The cylinder 2, a cap 3 to attach the cylinder 2 to a vessel mouth portion, a piston 5 installed slidably inside the cylinder 2, a nozzle head 4 to move the piston 5 up and down, the stem 6 inserted into and fixed to a shaft portion 4a of the nozzle head 4, a spring 7 interpolated in the cylinder 2 to spring the stem 6, and a suction valve 8 opening and closing a betweenness with a valve seat portion 2b of the cylinder 2 are provided. The piston 5 is movably extrapolated into the stem 6 within a fixed range scale, and in the cylinder a step part 2a to prevent the descent of the piston 5 is provided in the middle of pressing down the nozzle head 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
