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US Patent 7530784 Device for controlling variable-pitch vanes in a turbomachine

Patent 7530784 was granted and assigned to Snecma on May, 2009 by the United States Patent and Trademark Office.

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Patent abstract

A device for controlling variable-pitch vanes in a turbomachine has rods each having at one end a finger for mounting in a control ring and at its other end an assembly orifice for mounting on a drive square of a vane, the axis of the vane being inclined relative to the axis of the finger of the rod, and the assembly orifice in the rod presenting a dimension in the longitudinal direction of the rod that is greater than that of the drive square, and co-operating therewith to define clearance that varies over the height of the drive square and of the orifice.

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