Patent ID: 6899171
Filing Date: 2005-05-31
Classification: F16H,F16K,G05G,Y10T

Abstract:
1. An actuator system for shifting a control device that is pressure-loaded in the direction opposite the shift direction, said actuator system comprising: an actuator element capable of being axially moved in the shift direction within a system enclosure by a rotating spindle of an advance mechanism; the rotating spindle being slidingly connected to and rotating with a rotating sleeve that is pivot-mounted in the system enclosure and surrounds the rotating spindle, the rotating sleeve, relative to a circular flange rigidly connected to the system enclosure, being locked in position in the direction opposite the direction of advance rotation of the rotating spindle by means of a volute spring; the volute spring being associated with an emergency release unit for resetting the actuator element against the shift direction; the emergency release unit being provided with a tensioning sleeve for the volute spring; the tensioning sleeve being rotatable between a tensioned and a relaxed position and being pressure-loaded in the direction of its relaxed position, said volute spring being releasably retained in the tensioning sleeve's tensioned position.