| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for dispensing and injecting liquid which can effectively increase a cylinder sealing pressure and prevent the leakage of the liquid even after being used repeatedly for a long period. SOLUTION: In the apparatus for dispersing and injecting the liquid by using a cylinder and a piston, a recessed part 12 opened on one side is formed in the piston 10 the peripheral part of which contacts the inner surface of the cylinder 3a, and the opening of the recessed part is positioned on the side of the liquid 7 to be dispensed and injected. An opening part is formed in the piston and positioned on the side of the liquid dispensed and injected, and the apparatus with a sealing pressure increased is obtained. In an example, in addition to the piston having the recessed part, a piston having no recessed part is constituted integrally. |
