FOAM PUMP WITH IMPROVED PISTON STRUCTURE

摘要

A foam pump with the improved structure of a piston is provided to allow the liquid to be discharged by the form of foam generated by the injection of air into the liquid. A foam pump(10) comprises a piston housing(12); a piston assembly(14) which comprises a premixing chamber separated from an air chamber(32) capable of collapse and an air chamber(36) capable of no collapse by the premixing chamber wall; and an inclination member(38) which pressurizes the piston assembly to the non-operational position, wherein the foam pump is operated by compressing the piston assembly to the operational position facing the inclination member, the liquid capable of foaming with air is moved through the mixing aperture(43) at the same time to induce the turbulent mixing in a premixing chamber(40).