Patent ID: 9404384
Filing Date: 2016-08-02
CPC Classification: F01D,F05D

Claim Text:
1. A gas turbine engine comprising: an engine case; a compressor and/or turbine section having at least a first stage of variable vanes circumferentially spaced radially inward of the engine case; a synchronizing ring disposed about the engine case wherein the synchronizing ring has an I-beam cross-sectional shape with channels in opposing surfaces of the synchronizing ring wherein one channel is on a surface facing radially inward; a plurality of vane arms connected to the variable vanes; and a plurality of multi-axis joints connecting the synchronizing ring to the vane arms, each multi-axis joint providing each vane arm with movement about a first pivot axis and a second pivot axis, wherein the plurality of multi-axis joints interface with the channels in the synchronizing ring, wherein the multi-axis joints each have a first trunnion that is held within the synchronizing ring by a cover plate.