Patent ID: 8714828

Claim:
A wheel hub assembly comprising: first and second inner raceways disposed about a central axis of rotation, each one of the first and second inner raceways having a radius of curvature; a first row of rolling elements disposed on the first inner raceway and a second row of rolling elements disposed on the second inner raceway, each rolling element of the first row having a first outside diameter and each rolling element of the second row of rolling elements having a second outside diameter that is equal to the first outside diameter; and first and second outer raceways each having a radius of curvature, the first outer raceway being disposed generally about and axially spaced from the first inner raceway such that a first load line through the first row of rolling elements defines a first angle of contact with respect to the central axis, and the second outer raceway being disposed generally about and axially spaced from the second inner raceway such that a second load line through the second row of rolling elements defines a second angle of contact with respect to the central axis; and wherein the first row of rolling elements has an osculation ratio defined between the first outer raceway radius of curvature and the first rolling element outside diameter and another osculation ratio defined between the first inner raceway radius of curvature and the first outside diameter, the second row of rolling elements has an osculation ratio defined between the second outer raceway radius of curvature and the second rolling element outside diameter and another osculation ratio defined between the second inner raceway radius of curvature and the second outside diameter, and each of the two osculation ratios of the first row of rolling elements has a value different than the value of the corresponding osculation ratio of the second row of rolling elements.