US 12,240,610 B2
Inversion-formed double-walled tube and energy absorbing inversion tube assembly
Akif O. Bolukbasi, Mesa, AZ (US); and Timothy Gleason, Mesa, AZ (US)
Assigned to The Boeing Company, Cjocago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Nov. 29, 2021, as Appl. No. 17/536,783.
Prior Publication US 2023/0166842 A1, Jun. 1, 2023
Int. Cl. B64D 11/06 (2006.01); F16F 7/12 (2006.01)
CPC B64D 11/0619 (2014.12) [B64D 11/0648 (2014.12); B64D 11/0649 (2014.12); F16F 7/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An inversion-formed double-walled tube, comprising:
an outer tube having an outer wall thickness;
an inner tube disposed inside the outer tube and having an inner wall thickness; and
a transition portion connecting the inner tube and the outer tube;
wherein at least one of the inner and outer wall thicknesses varies along a length of the double-walled tube, and wherein the inner and outer wall thicknesses vary differently from each other along the length of the double-walled tube.