Borgwarner Inc.

Edmund John Radke

Joseph L Bair

A torsional vibration dampener assembly having resilient means to provide a variable torque output in conjunction with variable damping friction torque. The assembly utilizes a first set of torsion springs to provide a low deflection or displacement rate for a first stage of travel between the input and output members and a second set of springs providing an increased deflection rate for a second stage of travel, and a cooperating cam construction which can be arranged to provide an increase or decrease in damping friction as required in relation to the transmitted torque.

Vibration damper with variable spring rate and damping friction

A vibration damper for use in a lock-up clutch for a hydraulic torque converter, wherein the clutch provides a direct drive between the engine and transmission of a vehicle in high gear. The vibration damper is designed to be located in a limited space and yet provide relatively large springs for a requisite high torque capacity. The damper is provided with a hub, a driven plate and spring retainer or drive plates; the plates having alternating mounting flanges or legs to be secured to a clutch plate in a common plane and reduce the total thickness of the assembly.

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Mount Clemens, MI, United States of America

Edmund John Radke