| 摘要 |
PROBLEM TO BE SOLVED: To reduce pulsation of a pump flow rate of a liquid feed pump having a plunger.SOLUTION: A liquid feed pump includes a pump head having a pump chamber 1a, a plunger 5 having a distal end sliding in the pump chamber 1a, a seal member 7 having a contact portion 7a brought into contact with an outer periphery of the plunger 5 and a flange portion 7b protruded from the contact portion 7a to a side opposite from the plunger 5, and an elastic member 9 arranged around the plunger 5 through the contact portion 7a of the seal member 7 in a base end side of the plunger 5 compared to the flange portion 7b of the seal member 7. The elastic member 9 is deformed to press the contact portion 7a against the plunger 5 side when pressure is applied from the inside of the pump chamber 1a to the seal member 7. |
