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Originally Posted by Andrew Blair
What I'm worried about is in the retracted position, your piston should end up directly in line with both the lever arm and the pivot, and when you try to extend, the piston will jam.
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I dont understand your concern? Can you reference it to the drawing in my last post?
Keep in mind the piston linkage pivots at both ends (connected with bushings). As the piston in my drawing extends the piston will angle to the left. When the piston is at the center of its travel it is perpendicular to the lever.
As the piston extends all the way it pivots back to the right, to end up in line with its starting position. At no point in its travel is the piston parallel to the lever.
At the end points the piston is 45 degrees to the lever, which will give you 70% of the applied force holding the level against its mechanical stops.