Patent ID: 8678661
Filing Date: 2014-03-25
Classification: B60B,F16C

Abstract:
1. A vehicle wheel bearing apparatus comprising: an outer member formed with double row outer raceway surfaces on the outer member inner circumference; an inner member formed with double row inner raceway surfaces on the inner member outer circumference opposing the double row outer raceway surfaces of the outer member; double row balls freely rollably contained between the outer and inner raceway surfaces and the balls adapted to be applied at a predetermined contact angle on the outer and inner raceway surfaces; at least the inner raceway surfaces of the outer and inner raceway surfaces are formed as circular arc sections, each circular arc section having two radii of curvatures, each inner raceway surface circular arc section is formed by a first circular arc section and a second circular arc section, the first circular arc section with a first radius of curvature, the first circular arc section with the first radius of curvature extends between an inflection contact point (P