Patent ID: 8356477

Claim:
A method for deflecting an actuator comprising at least first and second interconnected movement components, wherein the at least first and second movement components comprise, respectively, first and second linear actuators with substantially coaxial first and second longitudinal axes, respectively, or first and second longitudinal axes, respectively, that are parallel to each other, the first and second linear actuators being interconnected in a longitudinal direction such that the linear movements of the first and second linear actuators are superimposed on one another, and such that at least one of the first and second linear actuators is adapted for being stopped at one or more predetermined positions, wherein at least one of the at least first and second movement components comprises a hydraulic piston actuator including a tubular piston element having a closed piston face on one end and being movably positioned inside a cylinder having a hollow space therein, wherein at least another of the at least first and second movement components comprises a spindle arrangement connected to a drive device, the spindle arrangement including an elongated spindle element with a first spindle thread that corresponds to a second spindle thread that is arranged on an inside of the piston element, the method comprising: stopping the first movement component at a predetermined position, causing the second movement component to make a deflection, and stopping the spindle arrangement if a failure of the spindle arrangement is detected and employing the hydraulic piston actuator for providing long and short regulating distances.