Abstract: The invention relates to an electrically driven linear actuator for linearly moving a mass, in which at least one elongated actuator element, which, on the output side, acts upon the mass, is mounted inside a main pipe in a manner that enables it to slide in an axial direction, and which, on the input side, is coupled to a spindle nut that, itself, rests upon a spindle, which is rotationally mounted inside the main pipe and which can be placed in rotational motion by an electric motor.

Abstract: The invention relates to an electrically driven linear actuator for linearly moving a mass, in which at least one elongated actuator element, which, on the output side, acts upon the mass, is mounted inside a main pipe in a manner that enables it to slide in an axial direction, and which, on the input side, is coupled to a spindle nut that, itself, rests upon a spindle, which is rotationally mounted inside the main pipe and which can be placed in rotational motion by an electric motor. The spindle nut rests upon the spindle in such a manner that it, during its axial motion caused by a rotation of the spindle, displaces each actuator element in a telescopic manner with regard to the main pipe.

Abstract: The invention is based on a pressure-medium cylinder having a piston which has a piston rod, and having a measuring system for determining the absolute position of the piston rod relative to a reference point. Firstly, the measuring system has a code track of binary code elements which is applied to the piston rod and runs along the piston rod, which code elements are formed by grooves and plateaus which run in the circumferential direction in a magnetically conductive base material, which is coated with a protective layer, of the piston rod, and, secondly, the measuring system has a sensor which is in a fixed position relative to the reference point and has two or more sensor elements, which are arranged along the code track and each scan a limited number of code elements.

Abstract: The invention is based on a pressure-medium cylinder having a piston which has a piston rod, and having a measuring system for determining the absolute position of the piston rod relative to a reference point. Firstly, the measuring system has a code track of binary code elements which is applied to the piston rod and runs along the piston rod, which code elements are formed by grooves and plateaus which run in the circumferential direction in a magnetically conductive base material, which is coated with a protective layer, of the piston rod, and, secondly, the measuring system has a sensor which is in a fixed position relative to the reference point and has two or more sensor elements, which are arranged along the code track and each scan a limited number of code elements.