POMPE DE DOSAGE ET/OU DE DILUTION

摘要

A dosage pump for accurately dispensing small quantities of liquids has a piston (32) with two different diameter portions which extend through opposite sides of a pump chamber (3). Reciprocation of the piston (32) changes the internal volume of the chamber (3) unoccupied by the piston and affords a pumping action. Since the differences in diameter of the piston portions can be made very small, even with moderate stroke lengths small quantities of liquid can be dispensed with accuracy. Provision is made for adjustment of the stroke length to provide for variation in delivered volume. The pump is suitable for use in analytical applications.