| 摘要 |
<p>PURPOSE:To make such a measuring pump as being excellent in accuracy securable, by setting up a stopper, regulating a stroke, in a driven piston, while moving a driving piston, forming an operating chamber in space with the driven piston, a distance longer than a stroke of the driven piston. CONSTITUTION:At a cylinder inside a pump block 1, there are provided with a driven piston 14 and a driving piston 13 so as to be opposed each other. An inner part of the driven piston 14 is formed into hollowness in which a stopper 22, regulating a stroke of the driven piston, is set up. In addition, a coil spring 18 is installed in the back of the driven piston, and in time of a suction stroke, it works to make the driven piston follow the driving piston. A fluid flowing in from a suction port 3 is held in between both pistons, but even if the driven piston stops after moving the specified stroke, the driving piston continues to move yet more and makes capacity in an operating chamber decrease, so that the said fluid is made to flow outward from a discharge port 7.</p> |
