Patent ID: 8240637

Claim:
A device configured to linearly displace a valve member, the device comprising: a spindle rotatably mounted with an axis of rotation perpendicular to a direction of displacement of the valve member, the spindle comprising: a first spindle part having a first external thread in a first direction; and a second spindle part having a second external thread in a second direction opposite the first direction; a first nut threaded on the first spindle part; a second nut threaded on the second spindle part; a first web having a first end and a second end; a second web having a first end and a second end; a first bearing perpendicular to the axis of rotation of the spindle coupled to the first nut, the first end of the first web rotatably mounted to the first bearing; a second bearing perpendicular to the axis of rotation of the spindle coupled to the second nut, the first end of the second web rotatably mounted to the second bearing; a first stop for the valve member; a third bearing mounted to the stop, the second ends of the first and second webs rotatably mounted to the third bearing; a second stop for the first nut and the second nut arranged parallel to the spindle on a side of the spindle facing away from the valve member, a stop face of the stop being perpendicular to the direction of displacement of the valve member, wherein the direction of displacement of the valve member, a middle of the third bearing, and a middle of the spindle are each arranged in a line facing away from the valve member; and a spring element, the spring element bearing on the first stop opposite the valve member, wherein the spring force acts on the stop in the direction of displacement of the valve member configured to close or open the valve.