Patent ID: 6955252
Filing Date: 2005-10-18
Classification: F16D,F16F,F16H

Abstract:
1. A torsional isolation device for isolating torque fluctuations of a rotary drive shaft, the device having an axis of rotation and comprising a first member for connection to the drive shaft, a second member for connection to a driven member, the first and second members being arranged for relative angular displacement, and a rolling element interposed in a cavity between the first and second members; the first and second members having opposed recesses that define said cavity, each recess having a ramped surface comprising a first portion and a second portion that defines a stop face, the stop faces of each recess being at opposed ends of the cavity, the rolling element being in contact with each ramped surface so as to enable the transmission of torque from one member to the other, wherein relative angular displacement of the first and second members in a first direction causes the ramped surfaces of the opposed recesses to move in opposite directions so as to rotate the rolling element such that the stop faces move away from one another and the first portions move towards one another so as to reduce a dimension of the cavity, and wherein when there is relative angular displacement in a second opposite direction the stop faces move towards one another and compress the rolling element, the contact between the rolling element and the ramped surfaces thus being continuous regardless of the relative angular disposition of the members.