Patent ID: RE39487

Claim:
A flywheel for a power transmission system for transmitting engine torque to a driven unit, comprising: an elastic plate secured to a crankshaft to rotate therewith; a flywheel body secured to said elastic plate and having an engageable surface for engaging with a clutch disc; and a reinforcing member for reinforcing said elastic plate at a portion of said elastic plate which is secured to said crankshaft; said elastic plate having an axial rigidity in the range of 600 kg/mm to 2200 kg/mm so as to ensure transmission of engine torque to said driven unit, while decreasing noise produced by a bending vibration of said crankshaft; wherein each of said elastic plate, said flywheel body and said reinforcing member comprises a first portion, said first portion of said flywheel body being placed axially between said first portion of said elastic plate and said reinforcing member, and said first portions of said elastic plate, said flywheel body and said reinforcing member defining clearances for allowing said first portion of said flywheel body to move axially between said first portions of said elastic plate and said reinforcing member.