A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
3/104
A61F 2/32 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01) A61F 2/34 (2006.01) A61F 2/36 (2006.01)
Patent
CA 2022766
ABSTRACT OF THE DISCLOSURE An implantable prosthetic hip joint includes a spherical acetabular shell articulating within the acetabulum socket of a pelvis and including a spherical shell portion defining an inner spherical surface, and a skirt portion extending downwardly therefrom; a femoral head including a femoral head and a stem secured to the femur of the person: a hemispherical bearing insert mounted in the spherical shell portion for receiving the femoral head for ball-and-socket movement therein; a retractable split annular rim positioned below the bearing insert and including a central opening which permits passage of the femoral head therethrough, and an inner ring surface, the rim including concentric threads along the outer surface thereof which releasably mate with concentric threads along the inner surface of the skirt portion to secure the rim in a first position spaced from the bearing insert and a second position at least substantially in contact with the bearing insert, with an annular recess being defined between the bearing insert and the split rim when the split rim is secured in the first position; and a split spring ring which retains the femoral head in the bearing insert, and includes an annular inner arcuate surface biased into engagement with the femoral head and being movable in the annular recess when the split rim is secured in the first position and being held by the inner ring surface when the split rim is secured in the second position.
Forte Mark R.
Implantology Inc.
Swabey Ogilvy Renault
LandOfFree
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