Patent ID: 11867068
Assignee: GENERAL ELECTRIC COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 4:
5. An apparatus to control clearance for a turbine or compressor engine, the apparatus comprising:
a first actuator to control clearance between a blade and at least one of a shroud or a hanger, the first actuator including a first multilayer stack of material and a third multilayer stack of material, and wherein the first actuator is coupled to the at least one of the shroud or a first hook of the hanger; and
a second actuator to control clearance between the blade and the at least one of the shroud or the hanger, the second actuator including a second multilayer stack of material and a fourth multilayer stack of material, the second actuator coupled to the at least one of the shroud or a second hook of the hanger, and wherein the first actuator and the second actuator are to move the at least one of the shroud or the hanger in an axial direction,
wherein the first multilayer stack of material, the second multilayer stack of material, the third multilayer stack of material, and the fourth multilayer stack of material each include at least one of piezoelectric material or shape memory alloy.