PLASTIC PRIMARY PISTON WITH FUNCTIONAL INSERT FOR PENETRATING TANDEM MASTER-CYLINDER AND MASTER CYLINDER EQUIPPED WITH SUCH A PISTON

摘要

A primary piston is described of molded plastic and equipped with a functional metallic insert and at least one groove. The primary piston is installed in a master cylinder comprising at least the primary piston and a secondary piston, these being mounted in the bore hole of a master cylinder. These pistons can create pressure in a primary pressure chamber and a secondary pressure chamber, respectively, due to the action of a push rod on the primary piston.