Flying device has hermetic surface, balloon, pump and hose whereby balloons contain light gas inside area confined by surface

摘要

Flying device has hermetic surface (1), balloon (2), pump (3) and hose (4). The balloons contain light gas inside the area confined by the surface. The confined area can change its total weight by the quantity of contained atmosphere gas, which is pumped in or pumped out with the pump through the hose.