Pneumatic feed system for fueling and supplying raw-materials in unmanned aircraft, uses combination of two-way valve and pressure control valve for filling fuel or working-material container

摘要

A system for feeding fuel or raw materials in unmanned aircraft. A combination of a two-way valve (4) and a pressure control valve (5) is used for filling a fuel or raw-materials container at zero pressure and for the purpose of supplying fuel or supplying raw material the container is pressurized at a practically constant pressure.