Patent ID: 7207888

Claim:
Torsional-vibration damping device ( 1 ), for a motor-vehicle clutch, the device comprising a web ( 60 ) and a support ( 80 ) which are mounted movable in rotation with respect to one another about a main axis, and are linked in rotation by way of circumferential elastic members ( 90 ; 190 , 290 ) for damping the torsional vibrations, the elastic members being interposed between the web ( 60 ) and the support ( 80 ) and held in position, on the one hand circumferentially, by way of claws ( 65 ; 165 , 265 ) of the web ( 60 ) and of claws ( 82 , 84 ; 185 , 285 ) of the support ( 80 ) on which the elastic members ( 90 ; 190 , 290 ) bear, and, on the other hand radially, by way of a guide ring ( 100 ; 200 ) passing through the elastic members ( 90 ; 190 , 290 ) and integral with the web ( 60 ), wherein the claws ( 82 , 84 ; 185 , 285 ) of the support ( 80 ) are mounted on either side of a section of the ring ( 100 ), and wherein the claws ( 65 ; 165 , 265 ) of the web ( 60 ) being freely movable to an angle between the claws ( 82 , 84 ; 185 , 285 ) of the support ( 80 ), wherein the claws ( 65 ; 165 , 265 ) of the web ( 60 ) and the claws ( 82 , 84 ; 185 , 285 ) of the support ( 80 ) being oriented substantially in the direction of the main axis, and wherein the claws of the support being grouped into pairs each forming a U, and wherein at least one substantially cylindrical guide ( 120 ) is mounted within only one of the elastic members ( 90 ; 190 , 290 ) and is interposed radially between the guide ring ( 100 ; 200 ) and the one of the elastic members ( 90 ; 190 , 290 ) to which the at least one substantially cylindrical guide ( 120 ) is mounted along a circumferential length of the one of the elastic members ( 90 ; 190 ; 290 ) and between the ends thereof, and wherein the guide ring ( 100 ; 200 ) locally exhibits areas where its thickness (E) is reduced radially in order to define hollow housings ( 104 ), and in that each claw ( 65 ; 165 , 265 ) of the web ( 60 ) is placed in an associated housing ( 104 ) so as to bear against the extremities ( 90 a , 90 b ) of the elastic members ( 90 ; 190 , 290 ).