Patent ID: 7431181

Claim:
A fluid-dispensing pump for discharging therethrough a fluid stored inside a fluid-storing portion from a nozzle head, said fluid-dispensing pump being configured to be disposed between the fluid-storing portion and the nozzle head and comprising: a cylinder; an inflow valve mechanism disposed at a bottom of the cylinder for introducing the fluid into the cylinder; an outflow valve mechanism disposed near the nozzle head for discharging the fluid through the nozzle head; a central tube having a fluid path axially formed inside; a leakage prevention valve body fixed at and extending outward from a lower end of the central tube; and a piston fixed around and to the central tube and configured to fluid-tightly reciprocate against an inner wall of the cylinder with the central tube and the leakage prevention valve body between a lower position and an upper position, wherein the central tube has an inlet opening disposed between the piston and the leakage prevention valve body and communicated with the fluid path, wherein an inner surface is formed inside the cylinder and is in contact with a periphery of the leakage prevention valve body to close a space therebetween when the piston is at the upper position.