Patent AT-E399982-T1: [Translated] METERING VALVE AND USE OF A VARIETY OF THEM

The dosing valve has a collection chamber (11) which is varied in volume by actuating the membrane (16), and which discharges into a valve output line (8). Enlarging the volume induces fluid by suction from the valve input line (7) only. Reducing the volume closes the first non return valve (13). The dosing piston (20) and membrane are operated together for discharge.