Patent ID: 8667887

Claim:
Actuator (A) for a rotating function element (G), in a closing element of a disk valve or a ball valve (V), comprising a housing having at least one pressure means supply and being closed at each of two opposite ends by respective covers, in which housing a piston is guided to reciprocate in a sealing manner, which contains diametrically opposed, convolution-like connecting links for a transverse axis of an actuator shaft rotatably mounted in a cover, submerging into the piston and rotatably driven by the piston with torques in opposite directions, and having two parallel guide rods each firmly anchored in the housing only at one end, which engage in guides extending in the direction of stroke and ending blind within the piston stroke, with one of the guide rods being anchored in the cover at one of the ends of the housing and the other guide rod being anchored in the other cover, and wherein the two guides end blind in the piston in opposite directions.