Patent ID: 8292051

Claim:
A valve (VD) intended to disconnect, braking of at least one of front wheels (RAS,RAD) or a trailer (RI), the valve comprising: a body ( 21 ); a first inlet connection ( 25 ) and a second inlet connection ( 24 ) intended to be connected to two master cylinders (CMS,CMD), each master cylinder (CMS,CMD) being operated by a separate braking pedal (PS,PD), directly controlling braking of one rear wheel (RPS,RPD), and controlling braking of at least one of the front wheels (RAS,RAD) or a braking device of the trailer (RI) when only one braking pedal (PS,PD) is operated; and a delivery connection ( 29 ) intended to be connected to at least one of a braking circuit of the front wheels (RAS,RAD) or to a trailer brake valve VFR, wherein said body ( 21 ) has a first bore ( 38 ) in which is installed one first movable piston ( 23 ) subjected to the action of pressure applied to said first inlet connection ( 25 ); said body ( 21 ) comprises a normally closed interception valve ( 26 ) closing a communication between said second inlet connection ( 24 ) and said delivery connection ( 29 ); a second piston ( 22 ) inserted in said body first bore ( 38 ), said second piston ( 22 ) being fixed by a retainment member and supporting said interception valve ( 26 ); and said movable piston ( 23 ) has a member ( 28 ) suitable for operating said interception valve ( 26 ) in order to open the interception valve ( 26 ) when said first movable piston ( 23 ) is displaced by the pressure applied to said first inlet connection ( 25 ), then allowing communication between said second inlet connection ( 24 ) and said delivery connection ( 29 ), and therefore allowing application to said delivery connection ( 29 ) of pressure present in said second inlet connection ( 24 ).