Sleeve for an acetabulum
AssigneeSulzer Brothers Limited
InventorsOtto Frey, Rudolf Koch
Life of this patent
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Abstract
The metal sleeve which is formed with the slot along a generatrix, comprises zones of relatively large wall thickness (D) and zones of relatively reduced wall thickness (d) in alternative relationship around the periphery. The zones of reduced wall thickness are in the form of annular sectors of finite length having parallel walls and radiused transitions into zones of relatively large wall thickness (D). When an insert is pressed in, the sleeve is expanded very uniformly over the entire periphery.
Claims16
A metal sleeve for an acetabulum having a frustum-shaped shell with a slot extending on one side from a base end to an apex end thereof and splitting said shell, said shell having a plurality of peripheral first zones of relatively large wall thickness and second zones of relatively small wall thickness alternating circumferentially about said shell, each second zone of relatively small wall thickness having an elongated annular sector and a transition portion at each end of said sector merging on a radius into an adjacent first zone of relatively large wall thickness.
A sleeve for an acetabulum having an annular wall forming a frustum-shape shell with a slot extending from an apex end to a base end thereof and splitting said sleeve, said wall comprising a plurality of peripheral first zones of relatively large wall thickness and second zones of relatively small wall thickness alternating circumferentially about said shell, each second zone of relatively small wall thickness having an elongated annular sector and a transition portion at each end of said sector merging on a radius into an adjacent first zone of relatively large wall thickness.
Dependencies are inferred from the claim text.