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Class Information
Number: 244/97
Name: Aeronautics > Aircraft control > Airship control > Buoyancy varying
Description: Devices and arrangements for controlling lighter-than-air craft by changing the buoyancy of all or part of the craft with respect to the surrounding air.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8565981 Method of controlling a buoyancy system for an aircraft, and a control system implementing said method Oct. 22, 2013
8474746 Aircraft configured for vertically ascending and landing Jul. 2, 2013
8387914 Solar thermal rotorcraft Mar. 5, 2013
8167240 System and methods for buoyancy management in an airship May. 1, 2012
8091826 Aerostatic buoyancy control system Jan. 10, 2012
8061651 Airship photocatalytic reactor energy generation, storage, and pipeless transmission systems Nov. 22, 2011
8033497 Hybrid thermal airship Oct. 11, 2011
7887007 High-altitude long-endurance airship Feb. 15, 2011
7856295 Device for issuing authorization to act on the operating conditions of an aircraft engine and engine control system comprising same Dec. 21, 2010
7568656 System for controlling the lift of aircraft Aug. 4, 2009
7500638 Heavy lift airship Mar. 10, 2009
7487936 Buoyancy control system for an airship Feb. 10, 2009
7472865 Dehumidification system for an airship Jan. 6, 2009
7469857 System and method for altitude control Dec. 30, 2008
7350749 Mass transfer system for stabilizing an airship and other vehicles subject to pitch and roll moments Apr. 1, 2008
7163177 Airship ballast system Jan. 16, 2007
7150430 Internet linked environmental data collection system and method Dec. 19, 2006
6966523 Airship and method of operation Nov. 22, 2005
6811113 Internet linked environmental data collection system and method Nov. 2, 2004
6811115 Method and system for setting hull parameter of airship and method of adjusting ascension rate of the same Nov. 2, 2004
6698686 Airship Mar. 2, 2004
6648272 Airship Nov. 18, 2003
6619586 Thermal airship buoyancy controller Sep. 16, 2003
6609680 High altitude airships Aug. 26, 2003
6425552 Cyclical thermal management system Jul. 30, 2002
6305641 Super-pressured high-altitude airship Oct. 23, 2001
6164589 Centerline landing gear for aerocraft Dec. 26, 2000
6119979 Cyclical thermal management system Sep. 19, 2000
6016991 Evacuated rotating envelope aircraft Jan. 25, 2000
5931412 Air balloon containing inert gas Aug. 3, 1999
5890676 Airship with neutral buoyancy fuel bladder Apr. 6, 1999
5813627 Balloon support apparatus for hot air balloon ride Sep. 29, 1998
5757157 Sensor mount apparatus May. 26, 1998
5538203 Ballonet system for a lighter-than-air vehicle Jul. 23, 1996
5348254 Long period floating airship Sep. 20, 1994
5333817 Ballonet system for a lighter-than-air vehicle Aug. 2, 1994
5297763 Safety balloon apparatus Mar. 29, 1994
5285986 Rigid airship with a carrier frame of ribs and beams enclosed by skin sections forming an envelope Feb. 15, 1994
5096141 Aircrane Mar. 17, 1992
5090637 Helium purification system for lighter-than-air aircraft Feb. 25, 1992
5076513 Aerostat intended to travel in an autonomous and reversible manner between the ground of a planet having an atmosphere and a predetermined ceiling altitude Dec. 31, 1991
5005783 Variable geometry airship Apr. 9, 1991
4986494 Process of stabilizing at altitude a stratoshperic balloon, and balloon adapted for carrying out the process Jan. 22, 1991
4934631 Lighter-than-air type vehicle Jun. 19, 1990
4865266 Hot air balloon and methods and devices for augmenting buoyancy, rate of lift, safety, envelope life and economy Sep. 12, 1989
4850551 Propulsion system for a buoyant vehicle Jul. 25, 1989
4773617 Lighter-than-air craft Sep. 27, 1988
4711416 Steerable lighter than air balloon Dec. 8, 1987
4640474 Method and apparatus for aerially transporting loads Feb. 3, 1987
4619422 Balloon carriage Oct. 28, 1986

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