Patent ID: 7069725
Filing Date: 2006-07-04
Classification: B60T

Abstract:
1. An electro-hydraulic brake circuit ( 1 ) for a vehicle, said brake circuit including a master cylinder ( 2 ), said master cylinder being provided with a primary chamber ( 10 ) and with a chamber ( 30 ) of a brake actuation simulator ( 8 ), the primary chamber ( 10 ) being closed at one end by a primary piston ( 9 ) and isolated from the chamber ( 30 ) of the simulator by an O-ring gasket ( 22 ) placed in a peripheral groove ( 16 ) on a circumference ( 14 ) of a secondary piston ( 11 ), said brake circuit being characterized in that the secondary piston ( 11 ) is provided with means making it possible to relieve pressure from the chamber of the simulator to the primary chamber, said pressure relief means having at least one pressure relief duct ( 32 ) located in the secondary piston ( 11 ) that starts at the peripheral groove ( 16 ) and by-passes the gasket ( 22 ).