PRECOMPRESSION SYSTEM FOR A LIQUID DISPENSING DEVICE AND METHOD OF ASSEMBLING SUCH PRECOMPRESSED SYSTEM

摘要

The invention relates to a precompression system for a liquid dispensing device, which prevents liquid from being discharged until a predetermined pressure has been built up. The precompression system comprises a pump for drawing liquid through an inlet and discharging it through an outlet and a precompression valve disposed between the pump and the outlet. The precompression valve allows liquid in the pump to reach the outlet only after the predetermined pressure is established and stops liquid from reaching the outlet when the pressure falls below the predetermined level. The precompression valve comprises an elastic diaphragm normally closing the valve opening and including a concave surface facing the valve opening and in fluid communication with the pump and a convex surface in fluid communication with atmospheric pressure. The elastic diaphragm may be stretched around a valve seat. The invention further relates to a method of assembling such a precompression system in a liquid dispensing device.