PROBLEM TO BE SOLVED: To provide a wide-angle vane type rocking actuator which is adapted to rock an output shaft by supplying discharging a working fluid to a cylinder chamber partitioned by a vane, has a wider rocking angle, compact size, high torque, small frictional resistance, and is excellent in durability, instead of a system often used on market, in which a rocking angle of 180°is expanded through a gear by making the most of compactness which is the characteristic of the vane type rocking actuator.;SOLUTION: An integrally formed seal packing 61 is mounted as a sealing material for partitioning the cylinder chamber to a groove of the vane 6 fitted and fixed to a shaft 5, a U-shaped part of the seal packing 61 is mounted to the groove 6b of the vane 6 on the long side of the vane 61, and a U-shaped part 61a branching from a circular part 61c of the seal packing 61 into two parts is mounted to the groove 6a on the short side of the vane 6.;COPYRIGHT: (C)2011,JPO&INPIT
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