Abstract: A torsional vibration damper includes an inertia mass and a rotating shaft or hub with an elastomeric ring between the inertia mass and the rotating shaft or hub. A large portion of said elastomeric member is located in a channel located either in the inertia mass or in the hub. This allows one to achieve high contact pressure without creating a significant fatigue on the elastomeric member. This can be used with either a crankshaft damper or an internal or external drive shaft damper.

Abstract: A torsional vibration damper includes front and rear hub members with an inertia mass between the two hub members. Annular elastomeric rings are positioned between the front and rear hub members and the inertia mass holding the inertia mass. Fasteners extend through the front hub member, the inertia mass, and fixed to the rear hub member. A clearance between the fastener and the inertia mass allows relative motion to absorb torsional vibration.

Abstract: A multi-mode vibration damper includes a hub comprising radially projecting spokes, an inertia mass defining recesses for receiving the hub spokes and a damping member between the spokes and recess sidewalls. The damping member is configured to provide vibration damping via substantially compressive stress in the damping member between the hub and inertia mass. An exemplary vibration damper provides vibration damping in a plurality of damping modes and at a plurality of damping frequencies. Exemplary embodiments of the vibration damper provide reduced parasitic inertia and a rocking mode below the torsional mode of the damper.

Abstract: A torsional vibration damper having a hub carrying a radially projecting flange and an annular inertia mass defining an annular channel encompassing the radially projecting flange and an elastomeric member. An annular compression ring is attached to the opening of the annular channel to axially compress and extrude the elastomeric member to fill the annular channel around the radial flange within the inertia ring. Projections defining an intermittent annular inner rim of the inertia mass extend through openings between the spokes of the hub and cooperate with an annular outer rim of the inertia mass to retain the compression ring.

Abstract: The invention includes systems and methods for designing a vibration control device. Included is a design suite having two or more of a Holzer analysis module, a sine-lock design module, a standard torsional damper design module, a common vertex torsional damper design module, a linear damper design module, a torsional isolator design module, an inertia calculator, a rubber database, a rubber distortion calculator, a mold design module, a joint analysis calculator, a compression set calculator, a assembly fixture module, and a mass scaling calculator consolidated on a single computer platform. Particular embodiments include the Holzer analysis module with one or more of the sine-lock design module, the standard torsional damper design module, the common vertex torsional damper design module, the linear damper design module, and the torsional isolator design module consolidated on the single computer platform.