Dispenser for products in liquid or gel form has dosing chamber with upper and lower compartments connected by central duct through piston

摘要

The dispenser comprises a reservoir (R) supporting a pump housing (1) controlled by an inlet valve (2) and equipped with an upper piston (3) forming a dosing chamber with one or more outlets in a nozzle (E). The dosing chamber is made in the form of lower (10a) and upper (10b) compartments connected by a central duct passing through the piston, which has a collar outside the pump housing to compress the product in the upper compartment.