Patent ID: 6875113
Filing Date: 2005-04-05
Classification: F16F,Y10S

Abstract:
1. The torsional vibration damper for a rotatable shaft, comprising: an annular inertia ring; an elastomeric layer disposed radially inward from the inertia ring; a polymer body disposed radially inward from the elastomeric layer, the polymer body including a radially-extending annular wall with opposed annular surfaces, an inner edge connecting the opposed annular surfaces to define a central bore, and a plurality of service ports extending through the radially-extending wall between the opposed annular surfaces; and an insert disposed in the central bore radially inward from the inner edge of the polymer body, the insert having a rotational axis when mounted to the rotatable shaft, the insert including a plurality of support flanges projecting radially outward into the polymer body, adjacent ones of the suppor having a n angular spacing about a circumference of the insert, each of the support flanges and a corresponding one of the service ports being substantially aligned along one of a plurality of radial lines extending from said rotational axis and each of the service ports positioned radially outward along one of the radial lines from a corresponding one of the support flanges, and wherein an axial force applied to support flanges, when the insert is mounted to the rotatable shaft, is transferred to the insert for reducing a portion of the axial force transferred to the polymer body.