POSITIVE SHUT-OFF POWER ASSISTED BRAKES

摘要

A mechanical arrangement to provide power assistance for the application of vehicle brakes with a positive shut-off of power assistance immediately upon release of the brake control (416) by the user. The shut-off is achieved mechanically by providing pressure relief from the power assist pressure chamber (402, 702) by connecting a pressure relief channel between the power assist chamber and the brake fluid reservoir (411, 711) or by disconnecting the power piston in the power assist chamber from the main piston (403, 704) as soon as the brake control is released by the user.