MASTER CYLINDER OF VEHICLE TWO-CIRCUIT HYDRAULIC BRAKE SYSTEM Russian patent published in 1995 - IPC

FIELD: transport; brake systems. SUBSTANCE: brake master cylinder has housing 1 with stepped working space, primary piston 4 and secondary piston 5 arranged in tandem in smaller diameter working space, valve with spacer bushings 17 and 18 mounted on spring-loaded seals 6 and 7 of pistons, secondary piston stop 23, constant-diameter tail piece of primary piston 4 projecting from housing and installed in support bushing 26 provided with circular projection 31, and also seal 28 and lockring 30; support bushing 26 is installed for movement and is pressed by flexible member made, for instance, in form of spring 27, to radial circular shoulder 33 of cylinder working space. EFFECT: enlarged operating capabilities. 5 cl, 1 dwg