US 12,097,969 B2
Fuel tank flammability protection system
Daniel Cowan, North Charleston, SC (US); Shane Edward Arthur, Kirkland, WA (US); and Marianne Elizabeth Wilkinson, Redmond, WA (US)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Apr. 13, 2022, as Appl. No. 17/659,061.
Prior Publication US 2023/0331394 A1, Oct. 19, 2023
Int. Cl. B64D 37/32 (2006.01)
CPC B64D 37/32 (2013.01) 22 Claims
OG exemplary drawing
 
1. A fuel tank protection system comprising:
an outer wall for a fuel tank;
an inner wall for the fuel tank, the inner wall and the outer wall forming a non-frangible double wall structure for the fuel tank, the double wall structure defining a cavity for holding fuel, the double wall structure surrounding the cavity;
a gap between the inner wall and the outer wall; and
an intumescent material located within the gap between the inner wall and the outer wall.