Patent ID: 7308791

Claim:
A master cylinder assembly comprising: a master cylinder having a length defining an axis, a top end and a bottom end, the master cylinder further defining a threshold distance along the axis from the top end of the master cylinder; a first piston disposed in and movable within the master cylinder, the first piston defining a distance along tie axis from the top end of the master cylinder; and a second piston disposed in and movable within the master cylinder, the second piston being operatively connected to the first piston; wherein when the distance from the first piston to the top end of the master cylinder is at least the threshhold distance, the second piston is movable with respect to the first piston, and wherein the second piston has a first piston engagement surface, the first piston has a second piston engagement surface, and the second piston engagement surface abuttingly engages the first piston engagement surface when the distance from the first piston to the top end of the master cylinder is less than the threshold distance.