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Balloon System

Abstract: 

The present disclosure relates to a balloon system that includes a flexible volume balloon hull configured to contain a lifting gas, a flexible volume ballonet contained within said balloon hull configured to contain a refrigerant gas and a refrigerant gas transfer device in fluid communication with the ballonet to control the balloon's vertical ascent and descent. 

Patent Number: 
9,568,918
Date Of Issue: 
02/14/2017
Inventors: 

William D. Perry