PLASTIC PRIMARY PISTON WITH INSERT FOR PENETRATION-TYPE TANDEM MASTER CYLINDER AND MASTER CYLINDER FITTED WITH SUCH A PISTON

摘要

The invention relates to a primary piston (20) made of moulded plastic and fitted with a metal insert (22) and comprising grooves (24), which is mounted in a master cylinder comprising at least one primary piston and one secondary piston both of which are mounted in the bore of the master cylinder. These pistons make it possible to create a pressure in a primary pressure chamber and in a secondary pressure chamber respectively, under the action of a push rod on the primary piston.