Patent ID: 8534996

Claim:
A compressor blade tip clearance control assembly comprising: a stator vane segment with an inner surface having a plurality of stator vanes extending inward; an annular sync ring positioned radial outward of the stator vane segment and fixed to a compressor casing so allow only circumferential movement; an eccentric crank fixed to the stator vane segment on one end and to the sync ring on an opposite end such that circumferential movement of the sync ring produces a radial movement of the stator vane segment; an actuator piston rigidly fixed to the sync ring; an actuator housing forming two pressure chambers with the actuator piston, the actuator housing being stationary to the compressor casing; and, a control valve associated with the actuator housing to regulate a fluid pressure in the actuator pressure chambers to move the actuator piston in a circumferential direction.