| 摘要 |
PURPOSE: To provide a fluid delivery pump which can effectively prevent the corrosion or dissolution of a coil spring. CONSTITUTION: This fluid delivery pump 1 is equipped with a piston 83 which can reciprocate in a cylinder 23; first and second hollow linking tubes 81, 82 which link a nozzle head 2 with a piston 22 to transmit a pressing force applied to the nozzle head 2 to the piston 83 for pushing down the piston 83; a coil spring 24 placed around the first and second linking tubes 81, 82 for enhancing the movement of the piston 83 in the upward direction; a first valve mechanism 86 which causes a fluid stored in a fluid storage section 4 to flow into the cylinder 23 when the piston 83 moves upward; and a second valve mechanism 87 which causes the fluid flowing into the cylinder 23 to flow into the nozzle head 2 through the insides of the first and second linking tubes 81, 82 when the piston 83 moves downward.
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