Gm Global Technolgoy Operations, Inc.

Peter W Mack

Victor M Roses

Jeffrey R Lee

Steven L Clark

An isolating torque coupler includes a drive element assembled between annular cage elements of a driven element. The cage elements each include a plurality of aligned voids. The drive element includes a hub portion and a plurality of lobes with each of the lobes including a first edge and a second edge. Openings in the drive element are aligned with the voids of the cage elements to accommodate isolator springs. Each isolator spring is a helical coil compression spring having squared ends. A first edge of each of the lobes of the drive element is parallel to a second end of the corresponding one of the voids of the driven element. A second edge of each of the lobes of the drive element is non-parallel to a first end of the corresponding one of the voids of the driven element.

Isolating torque coupler

A damper assembly for absorbing and attenuating torsionals and vibrations transmitted from an engine to a transmission is provided. The damper assembly includes a damper flange with a plurality of spring-mass damper systems operatively attached thereto and elongated circumferentially about its outer periphery. Each spring-mass damper systems include an inner spring nestably positioned inside an outer spring, a first spring retainer having a base portion defining a first interface surface with a first pilot portion extending therefrom to define a second interface surface with a second pilot portion extending therefrom, and a second spring retainer having a base portion defining an interface surface with a pilot portion extending therefrom to define a fourth interface surface. The first and third pilot portions engage with and thereby restrict axial and radial movement of the outer spring. The second pilot portion is attached to the inner spring thereby restricting relative movement therebetween.

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Dearborn, MI, United States of America

Peter W Mack