Patent ID: 6010408
Filing Date: 2000-01-04
Classification: F02B,F16F,F16H

Abstract:
A torsion isolator including first and second drives mounted for relative rotation about a common axis; a c-shaped spring having a flexible major arc portion thereof circumscribing the axis and having first and second circumferentially spaced apart ends; attachment means for connecting the first and second ends respectively to the first and second drives a radial distance from the axis; the spring for transmitting torque between the drives and for attenuating torsionals; the spring ends circumferentially movable relative to each other in response to a change of values of the torque which causes flexing of the major arc portion and changing of concentricity of the spring relative to the axis and which causes a changing of rotational balance of the isolator; characterized by:an active counterbalance mechanism including a counterweight carried by one of the drives and positioning means for moving the counterweight to a position countering the changing of rotational balance of the isolator in response to the relative circumferential movement of the spring ends.