Unmanned aircraft for telecommunicative or scientific purposes
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United States of America Patent
Stats
-
Oct 16, 2012
Grant Date -
Jul 30, 2009
app pub date -
Jul 1, 2006
filing date -
Jan 10, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Unmanned aircraft for telecommunicative or other scientific purposes, which is stationed at a determined height, in particular in the stratosphere. The aircraft includes a gas-filled balloon carrying a platform and equipment that maintains the platform in a position relative to the ground. The balloon carrying the platform is disposed in the interior of an external balloon of aerodynamical shape, particularly in the stratosphere. At least one low or high pressure insulation chamber filled with a medium is arranged between them and encircles the inner balloon. The medium used in the insulation chamber is a gas having a low thermal conductivity. The negative effects of the temperature differences are largely compensated so that the inner balloon can be produced from a lighter and cheaper material, thereby increasing durably its longevity.
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