Patent ID: 8066778

Claim:
An acetabular cup assembly comprising: a cup having a rim and a first longitudinal axis that extends perpendicularly to the rim, the cup comprising: a porous metal outer portion; a solid metal inner portion connected to the porous metal outer portion and having the rim that includes a first ledge, a second ledge and a bearing engaging surface located between the first and second ledges, the first and second ledges being generally perpendicular relative to the first longitudinal axis of the cup, the bearing engaging surface being one of arcuate or tapered from the first ledge to the second ledge along a cross-section of the cup that is substantially parallel to the first longitudinal axis, the solid metal inner portion being metallurgically bonded to the porous metal outer portion such that the solid metal inner portion is non-removable from the porous metal outer portion, the solid metal inner portion further comprising at least one annular lip that extends radially substantially perpendicularly to the first longitudinal axis of the cup and into a thickness of the porous metal outer portion; and a bearing having a first shoulder and a second longitudinal axis that extends perpendicularly to the first shoulder, the bearing further having a second shoulder and a cup engaging surface located between the first and second shoulders, the cup engaging surface being one of arcuate or conical along a cross-section of the bearing that is substantially parallel to the second longitudinal axis, wherein the bearing is adapted to be selectively secured to the solid metal inner portion in an assembled position, such that the first shoulder of the bearing and the first ledge of the rim engage, the second shoulder of the bearing and the second ledge of the rim engage and the respective bearing and cup engaging surfaces secure in an interference connection.