Patent ID: 8662259

Claim:
A braking device comprising a brake housing ( 101 ) mounted in relative rotation relative to a shaft ( 120 ), first braking means ( 134 ), solid in rotation with the brake housing ( 101 ), second braking means ( 132 ) solid in rotation with the shaft ( 120 ), adapted to cooperate with said first braking means ( 134 ), a braking piston ( 154 ) adapted to stress said first braking means ( 134 ), at least one spring washer ( 168 ) comprising a first face, a second face, an internal periphery ( 168 B) and an external periphery ( 168 A), said spring washer ( 168 ) being mounted supported on the brake housing ( 101 ) according to a housing support zone located on one of the internal ( 168 B) or external ( 168 A) peripheries of the first face of said spring washer ( 168 ), said spring washer ( 168 ) having on its second face a braking support zone, adapted to cooperate with the braking piston ( 154 ) so as to stress the first braking means ( 134 ) according to a braking direction, wherein said device further comprises: an unbraking piston ( 178 ), adapted to stress the elastic means ( 168 ) according to a direction opposite said braking direction, the at least one spring washer ( 168 ) has an unbraking support zone with the unbraking piston ( 178 ) on the other of said internal ( 168 B) or external ( 168 A) peripheries of the second face of the spring washer ( 168 ), said braking support zone being located at an intermediate position of the at least one spring washer ( 168 ), between the housing support zone and the unbraking support zone, wherein said first and second braking means ( 132 and 134 ) as well as the unbraking piston ( 178 ) are mounted concentrically on the axis ( 120 ), the unbraking piston ( 178 ) being arranged substantially at the outer periphery of said first and second braking means ( 132 and 134 ).