Patent ID: 11970954
Assignee: RTX CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. An airfoil comprising:
an airfoil wall defining a leading end, a trailing end, and first and second sides joining the leading end and the trailing end, the first and second sides spanning in a radial direction; and
a plurality of ribs including, from fore to aft, first, second, third, and fourth ribs connecting the first and second sides of the airfoil wall, each of the plurality of ribs defining
a tube portion circumscribing a rib passage, and
first and second connector arms solely joining the tube portion to, respectively, the first and second sides of the airfoil wall;

the first rib and the airfoil wall bounding a first cooling channel there between;
the first rib, the second rib, and the airfoil wall bounding a second cooling channel there between;
the second rib, the third rib, and the airfoil wall bounding a third cooling channel there between;
the third rib, the fourth rib, and the airfoil wall bounding a fourth cooling channel there between,
wherein the tube portion of each of the first, second, and third ribs is rectangular and includes forward and aft rib walls and first and second rib side walls that are joined at respective corners with the forward and aft rib walls, and the first connector arm projecting from the first rib side wall and the second connector arm projecting from the second rib side wall, and
the tube portion of the fourth rib is triangular and follows a taper of the airfoil wall toward the trailing end.