Locking ring for liner of acetabular cup

Details Locking ring for liner of acetabular cup Locking ring for liner of acetabular cup

2007-09-11

2007-09-11

Ramana, Anuradha (Department: 3733)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

Reexamination Certificate

active

10731628

ABSTRACT:
An artificial hip joint is provided including a generally hemispherical acetabular cup with a generally hemispherical liner mated within the acetabular cup and with a locking ring to secure the liner within the acetabular cup. The acetabular cup is adapted to be secured within a hip bone. The liner includes a hemispherical inside surface for pivotably supporting a head at an upper end of a femur. The locking ring resides within an annular groove in the acetabular cup and an annular seat in the liner. The locking ring includes a captured end and a free end. The captured end includes a slot which cooperates with a post in the acetabular cup to slidably hold the captured end to the acetabular cup. The locking ring removably attaches the liner to the acetabular cup.

REFERENCES:
patent: RE28895 (1976-07-01), Noiles
patent: 4242775 (1981-01-01), Eickmann
patent: 4380090 (1983-04-01), Ramos
patent: 4408360 (1983-10-01), Keller
patent: 4666450 (1987-05-01), Kenna
patent: 4687399 (1987-08-01), Petrie
patent: 4695282 (1987-09-01), Forte
patent: 4936855 (1990-06-01), Sherman
patent: 4963154 (1990-10-01), Anapliotis
patent: 5314491 (1994-05-01), Thongpreda
patent: 5383938 (1995-01-01), Rohr
patent: 5549696 (1996-08-01), Willi

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