Master cylinder assembly for a vehicle braking system

摘要

In a master cylinder assembly separate master cylinders are connected by a common transfer passage through which the pressure spaces of the master cylinders in advance of pistons are in communication when the master cylinders are operated simultaneously, and communication between the pressure spaces is cut off by a transfer valve mechanism when one of the master cylinders is operated on its own. Each piston is guided to slide in its respective bore only by the sliding engagement with the bore of a guide portion of the piston and the guide portion is disposed on the outermost side of a transfer port with which the transfer passage is in communication when the piston is in a retracted position.