Actuator

An actuator for actuating a valve element of a valve, comprising:

• at least one detent device for establishing a position of a terminal detent, each of the at least one detent device including
• at least one terminal detent element including a detent face as a respective one of the terminal detent and configured to impinge on a part of a drive train of the actuator, and
• at least one adjustment element which is operatively connected to the at least one terminal detent element, and which is configured to set the position of the at least one terminal detent element,
• wherein the at least one adjustment element comprises a first adjustment element and a second adjustment element,
• wherein at least one transmission is disposed between the at least one terminal detent element and the at least one adjustment element,
• wherein a first gear unit is disposed between the at least one terminal detent element and the first adjustment element,
• wherein a second gear unit is disposed between the first adjustment element and the second adjustment element, such that a rotating movement of the second adjustment element is converted to an adjusting movement of the at least one terminal detent element, and
• wherein at least one of the first gear unit and the second gear unit includes a converter element, the at least one adjustment element has a thread which engages in a corresponding mating thread on the converter element, and a rotation of the adjustment element leads to a variation of a position of at least one of the converter element or of the terminal detent element with respect to the drive train.