CAPTIVE BALLOON Russian patent published in 2006 - IPC B64B1/50 

FIELD: aerostation.

SUBSTANCE: proposed captive balloon includes gas-carrying envelope with hole at lower pole and vertically oriented hose made from gastight elastic material whose edges are secured to edges of hole in lower pole of envelope forming gastight joint. Hose is located inside envelope which has hole at upper pole whose edges are connected with edges of other end of hose forming gastight joint. Balloon is provided with rod whose ends are passed through holes at upper and lower poles of envelope. Two movable washers freely mounted on rod are rigidly connected with edges of hose over perimeter at point of attachment of edges of hose to edges of hole. Hose is widening from center to ends. Located on the outside of envelope on side of upper and lower poles are aprons whose peripheral sections are fastened with envelope by means of elastic rods; central section is rigidly connected with one of rod ends.

EFFECT: retaining of envelope shape at change in volume.

3 cl, 2 dwg