Double piston-swivel drive for e.g. switching industrial armature, has energy storage activated in danger condition by safety elements, such that energy storage displaces pistons independent of functional state of drive in given position

摘要

The drive (100) has a drive shaft supported in a housing (102), and energy storage and pistons (110, 112) supported in a normal operation over a drive between two end positions. The pistons stay in connection with the shaft such that a linear movement of the pistons is transferred to a pivoting of the shaft. A safety device is provided within the housing. The energy storage is activated in a danger condition by safety elements (129, 131), such that the energy storage displaces the pistons independent of a functional state of the drive in a given position and/or is held in the given position.