Patent ID: 9541007
Date: 2017-01-10
CPC Classifications: F01D,F02C,F05D,Y10T

Claim:
1. A coupling shaft assembly for a gas turbine engine comprising: a forward coupling shaft section includes a forward interface spline and a forward mid shaft interface spline disposed upon a vertical diaphragm extending radially outward from the forward coupling shaft, and a fluid bridge extending axially aft of the vertical diaphragm; and an aft coupling shaft section includes an aft mid shaft interface spline and an aft interface spline, said aft mid shaft interface spline engageable with said forward mid shaft interface spline, the aft mid shaft interface spline disposed on a forward extending cylindrical extension, wherein the fluid bridge includes openings for communicating oil to the interface between the forward mid shaft interface spline and the aft mid shaft interface spline.