Patent ID: 6443284
Filing Date: 2002-09-03
Classification: F16F

Abstract:
An apparatus for isolating torsional vibrations in a driveline comprising:a rotatably supported input shaft having a first end, a second end, and an inner bore, said input shaft having a plurality of projections disposed adjacent to said first end thereof, said projections for engaging the radially extending projections of a driven member of a friction torque device, said input shaft projections having a length and a width; and a torsion bar having a torsional spring rate, said torsion bar at least partially disposed within said bore of said input shaft, said torsion bar having a first end and a second end, said torsion bar having a plurality of projections disposed adjacent to said first end thereof, said projections for engaging the radially extending projections of a driven member of said friction torque device, said torsion bar projections having a length and width, said second end of said torsion bar coupled to said second end of said input shaft, said width of said torsion bar projections being greater than said width of said input shaft projections to provide a lash between said input shaft projections and the radially extending projections of said driven member to permit rotation of said first end of said torsion bar relative to said first end of said input shaft, whereby torsional vibrations are isolated.