Patent ID: 11898494
Assignee: GENERAL ELECTRIC COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 11:
12. A piston ring assembly for a gas turbine engine including a structural member positioned in or around at least a portion of a combustion section, the combustion section having a liner extending between a forward end and an aft end, the piston ring assembly comprising:
a piston ring configured to extend around the aft end of the liner; and
a piston ring holder including a first end attached to the structural member and a second end positioned proximate the piston ring at the second end, the piston ring holder further including
a first portion comprised of a first metal material having a first coefficient of thermal expansion, αH1, and
a second portion comprised of a second metal material having a second coefficient of thermal expansion, αH2, the first coefficient of thermal expansion, αH1, being different than the second coefficient of thermal expansion,

wherein the piston ring holder has a unitary non-separable configuration between the first portion and the second portion and
wherein the piston ring holder is free of ceramic materials.