Patent ID: 8690688

Claim:
A double damping flywheel ( 10 ), comprising a primary ( 12 ) flywheel member comprising a primary flywheel ( 16 ) and a secondary ( 14 ) flywheel member comprising a secondary flywheel ( 22 ), the primary ( 12 ) and secondary ( 14 ) flywheel members being coaxial and rotatable relative to one another and coupled by first ( 26 ) and second ( 28 ) damping means arranged in series by a connecting web ( 36 ), such that: the first damping means ( 26 ) comprising at least one curved elastic member ( 34 , 134 ) running circumferentially between two first seatings ( 40 A, 140 A) carried by the connecting web ( 36 , 136 ); the second damping means ( 28 ) comprising at least two groups ( 47 ) of elastic members, each comprising at least two straight elastic members ( 46 , 146 ) arranged in series by an intermediate bearing element ( 52 , 152 ), each of the groups ( 47 ) of straight elastic members running circumferentially between two second seatings ( 40 B, 140 B) carried by the connecting web ( 36 , 136 ); the double damping flywheel ( 10 ) further comprising at least one annular phasing member ( 50 , 150 ) for phasing the straight elastic members ( 46 , 146 ), separate from the connecting web ( 36 , 136 ), carrying the intermediate bearing element ( 52 , 152 ) of each group; the difference between the maximum angular displacement between the primary member ( 12 ) and the connecting web ( 36 , 136 ) and the maximum angular displacement between the secondary member ( 14 ) and the connecting web ( 36 , 136 ) being less than 30°.