Patent ID: 8905334

Claim:
A hydraulic stroke transmitter to a control element, comprising: a solid state actuator for generating a stroke; and a hydraulic system forming a hydraulic bearing for the solid state actuator that transmits the stroke of the solid state actuator to the control element and provides compensation for play, the hydraulic system including hydraulic volumes hermetically sealed by metal bellows outside the hydraulic stroke transmitter, and wherein a first of the metal bellows, forming a first hydraulic volume, is fixed and hermetically sealed to a first fixed bearing and an end plate at a front end of the solid state actuator, a second of the metal bellows, forming a second hydraulic volume, is fixed and hermetically sealed to the first fixed bearing and a movable piston connected with a hollow cylinder, and a third of the metal bellows, forming a third hydraulic volume, is fixed and hermetically sealed to the movable piston and another end plate.