PERFECCIONAMIENTOS EN CILINDROS MAESTROS HIDRAULICOS PARA SISTEMAS DE FRENOS O DE CONTROL DE EMBRAGUE DE VEHICULOS AU-TOMOVILES.

摘要

The hydraulic master-cylinder of the invention is of the kind having a valve ring made of elastomeric material mounted on the head of a piston adjacent to the pressure chamber. The master-cylinder further includes a safety valve in the pressure chamber. The safety valve is guided on the piston head and is adapted to sealingly cooperate with both one face of the valve ring and a shoulder provided on the piston head. The safety valve is biased toward the valve ring by a spring abutting on a stop fixed relative to the piston.