Patent ID: 6962533
Filing Date: 2005-11-08
Classification: F16F

Abstract:
1. A torsional vibration damper comprising: a primary side; a secondary side which is rotatable relative to the primary side; a forward base spring arrangement which deflects to exert a base restoring force on the secondary side when the secondary side exceeds a forward base angle relative to the primary side in a first direction of rotation, wherein the forward base angle is between one and two degrees; and a forward auxiliary spring arrangement which deflects to exert a forward auxiliary restoring force on the secondary side only when the secondary side exceeds a forward auxiliary angle relative to the primary side in said first direction of rotation, wherein the forward auxiliary angle is between two and four degrees; wherein said forward auxiliary angle is larger than said forward base angle, and wherein said forward base spring arrangement and said forward auxiliary spring arrangement stop deflecting simultaneously when said secondary side rotates around a forward limit angle relative to said primary side in said first direction of rotation.