Patent ID: 7150207

Claim:
A dual-mass flywheel comprising: a primary mass ( 51 ) and a secondary mass ( 47 ) that are rotatable with respect to each other, both masses ( 47 , 51 ) being connected to one another via a spring element ( 49 ) to form a drive system, the spring element ( 49 ) being impingeable by a flange ( 43 ) connected to the secondary mass ( 47 ) in a rotationally fixed manner, and mounting regions ( 5 ) between the secondary flywheel mass ( 47 ) and the flange ( 43 ) being provided radially inside a friction surface ( 7 ) supported by the secondary flywheel mass ( 47 ), the secondary flywheel mass also having axial passages ( 37 , 39 ) radially inside the friction surface ( 7 ), and buffers ( 9 ) of the secondary flywheel mass present radially inside the axial passages and regions ( 13 ) present radially outside the passages being connected to one another via radial ribs ( 29 ), and said mounting regions ( 5 ), viewed in the circumferential direction of the flywheel, each being provided between two radial ribs ( 29 ) and disposed in circumferential extending areas of the axial passages.