Patent ID: 7775197

Claim:
An engine comprising: a sub-system having a movable element that is moved by an actuator to control flow of a fluid associated with operation of the engine; the actuator comprising a prime mover and a mechanism coupling the prime mover with the movable element; the mechanism comprising 1) a first link arranged to be swung about a first axis by the prime mover, 2) a second link arranged to swing about a second axis that is parallel to and spaced from the first axis, 3) a constraint that operatively couples the links to cause swinging of the first link about the first axis to swing the second link about the second axis with a mechanical advantage that changes as the first link swings the second link, and 4) an operative connection from the second link to the moveable element for converting swinging of the second link into movement of the movable element, wherein the constraint that operatively couples the links comprises a slot within one of the first and second links and a guide member connected to the other of the first and second links that guides within the slot.