Patent ID: 7326253

Claim:
A prosthetic cup assembly defining a central axis, comprising: a shell configured to possess (i) a first frusto-conical inner surface that defines a first inner taper angle with respect to said central axis, and (ii) a second frusto-conical inner surface that defines a second inner taper angle with respect to said central axis; and a liner configured to possess (i) a first frusto-conical outer surface that defines a first outer taper angle with respect to said central axis, and (ii) a second frusto-conical outer surface that defines a second outer taper angle with respect to said central axis, said first frusto-conical outer surface and said second frusto-conical outer surface being positioned contiguous with respect to each other, wherein said first outer taper angle is equal to said first inner taper angle in a pre-assembly state of said liner, wherein said second outer taper angle is greater than said second inner taper angle in said pre-assembly state of said liner, and wherein in an assembled state both (i) said first frusto-conical outer surface engages said first frusto-conical inner surface, and (ii) said second frusto-conical outer surface engages said second frusto-conical inner surface to couple said liner to said shell.