Eaton Corporation

Thomas D Chimner

Michael J Otto

Warren G Bopp

Jerry F Baremor

A torsion isolator assembly (30) for reducing driveline torsionals includes a vane damper (36) having valving (40d,40e) for regulating the damping factor of the damper, spiral springs (32,34 or 82,84), and cam surfaces (44d,44c) which engage the ends of the spiral springs (32,34 or 82,84).; The spiral springs (32,34 or 82,84) have a lesser radial spacing between the outer convolutions as compared to the radial spacing between the inner convolutions.

Spiral spring of a torsional damper

A torsion isolator assembly (30) for reducing driveline torsionals includes a vane damper (36) including improved valving (40d,40e) for increasing the damping factor of the damper, improved spiral springs (32,34 or 80,82) for reducing spring stress primarily due to centrifugal forces, and cam surfaces (44d,44c) for further reducing spring stress due to centrifugal forces.

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Rochester, MI, United States of America

Thomas D Chimner