US 12,292,016 B2
Axial expandable exhaust duct
Lawrence A. Binek, Glastonbury, CT (US); and Jesse R. Boyer, Middletown, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on May 7, 2024, as Appl. No. 18/657,373.
Application 18/657,373 is a division of application No. 17/856,612, filed on Jul. 1, 2022, granted, now 12,000,360.
Application 17/856,612 is a continuation of application No. 16/722,726, filed on Dec. 20, 2019, granted, now 11,378,038.
Prior Publication US 2024/0287950 A1, Aug. 29, 2024
Int. Cl. F02K 1/80 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01); F02K 1/08 (2006.01); F02K 1/09 (2006.01)
CPC F02K 1/80 (2013.01) [B33Y 80/00 (2014.12); B33Y 10/00 (2014.12); F05D 2220/323 (2013.01); F05D 2230/31 (2013.01); F05D 2230/60 (2013.01); F05D 2240/128 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An assembly for an engine, comprising:
an outer exhaust duct; and
an inner exhaust duct nested within the outer exhaust duct;
the inner exhaust duct configured to move axially along a centerline between a first position and a second position, the inner exhaust duct axially overlapped by the outer exhaust duct by a first distance at the first position, the inner exhaust duct axially overlapped by the outer exhaust duct by a second distance at the second position, and the second distance less than the first distance; and
the inner exhaust duct further configured to be fixed to the outer exhaust duct at the second position;
wherein the inner exhaust duct is fixed to the outer exhaust duct using a key mated with a keyway.