Super Gripper Variable Vane Arm.
Patent, Filed 27 Mar 86, patented 26 May 87,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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A variable vane assembly is disclosed which entails a vane arm which integrally engages with a vane stem without the use of threaded fasteners. The vane stem has a tip with parallel slots on opposite sides which are spaced below the end of the tip. At the end of the tip is an end slot which is perpendicular to the parallel slots. The tip of the van stem has a ramped side parallel with the end slot. The van arm is a flat wide metal strip that serves as the van blade and integrally connects with the van stem using two ears, which are turned inwards to engage with the parallel slots in the wave stem. Additionally, a central leaf exists between the two ears which turns downwards to fit in the end slot in the tip of the vane stem. The central leaf thereby acts as an axial retainer and allows the van arm to be rotated with the rotation of the van stem.
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