Patent ID: 8663336

Claim:
(a) An assembly of elements forming a cup of a type used in artificial hips with means for readjustment in the socket of the pelvic bone and with positive locking when placed in a final position, comprising: a concave spherical surface for accepting a ball of an artificial hip; an external convex surface which will be affixed to the pelvic bone, said external convex surface having circumferential groove for accepting a single split ring; an external equatorial planar surface having orthogonal multiple tapped holes for accepting set screws, said tapped holes penetrating entire thickness of a lip formed by the groove in the convex surface and planar surface of the cup, (b) A split circumferential ring having an internal angularly shaped surface and an external Surface shaped in a form of a knife edge, said ring's cross sectional footprint is identical to a cross sectional footprint of the groove in the convex external surface of the cup, and when split ring is inserted into the groove, no portion of it shall protrude beyond the external surface of the cup, (c) A set screw having one end conically shaped, said conical shape of the set screw having an angle compatible with an internal surface of the split ring, (d) A split ring, further having a variety of knife edges and identical shape but comprising of multiple segments, (e) A circularly shaped ring having a circular cross section which provides means of retaining split ring segments in said hip cup.