US5609648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetabular cup assembly
Assignee: Sulzer Medizinaltechnik AG
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Filing: 1995-01-27
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Granted: 1997-03-11
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Expires: 2015-01-27
Abstract
Abstract A joint socket (2) for a hip joint prosthesis comprises an outer shell (5) adapted for being anchored into a bone seat and an inner shell (6) adapted for receiving a ball of a joint. A threaded plug (10) is threadably coupled within a threaded bore (8) of the outer shell and a projection (22) extends from the polar region of the inner shell into an axial recess (20) of the threaded plug for centering the inner shell relative to the outer shell. The threaded plug seals off the inner volume of the outer shell, thereby preventing contact between rubbed off particles of the interacting inner and outer shells and the bone tissue. In addition, it allows the surgeon to directly observe the bone tissue lying behind the threaded bore of the implanted outer shell.
Inventors
- 👤 J urg Oehy
- 👤 Kurt Bider
- 👤 Martin Schoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2/30721; A61F2/30744; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/46; A61F2/4637; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30143; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30354; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30405; A61F2002/30535; A61F2002/30594; A61F2002/30667; A61F2002/30682; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30787; A61F2002/3079; A61F2002/3085; A61F2002/3401; A61F2002/3403; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2230/00; A61F2230/0002; A61F2230/0017
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
A joint socket of a hip joint prosthesis comprising: an outer shell adapted for being anchored into a bone seat, the outer shell having a perforated threaded bore for receiving a driver tool; an inner shell adapted for receiving a ball of a joint, the inner shell having a polar region and an equatorial region; a threaded plug threadably coupled within the threaded bore for sealing the threaded bore from the bone seat, the threaded plug having an axial recess opening towards the inner shell; and a projection extending from the polar region of the inner shell and having a center portion projecting into the axial recess of the threaded plug to center the inner shell relative to the outer shell.
Claim 2
Dependent Claim
121 words
A joint socket of a hip joint prosthesis comprising: an outer shell adapted for being anchored into a bone seat, the outer shell having a perforated threaded bore for receiving a driver tool; an inner shell adapted for receiving a ball of a joint, the inner shell having a polar region and an equatorial region; a threaded plug threadably coupled within the threaded bore for sealing the threaded bore from the bone seat, the threaded plug having an axial recess opening towards the inner shell; and a projection extending from the polar region of the inner shell and having a center portion projecting into the axial recess of the threaded plug to center the inner shell relative to the outer shell.
Claim 3
Dependent Claim
19 words
The joint socket of claim 1 wherein the threaded plug defines contact surfaces for receiving a screw driving tool.
Claim 4
Dependent Claim
25 words
The joint socket of claim 2 wherein the contact surfaces are formed on a slit traversing the threaded plug and opens towards the inner shell.
Claim 5
Dependent Claim
35 words
The joint socket of claim 3 wherein the recess includes partial surfaces arranged in the form of a polygonal socket and the projection comprises a spigot centered within the partial surfaces of the polygonal socket.
Claim 6
Dependent Claim
21 words
The joint socket of claim 2 wherein the threaded plug includes partial surfaces arranged in the form of a polygonal head.
Claim 7
Dependent Claim
38 words
The joint socket of claim 1 wherein the threaded plug has a press shoulder with a sealing surface seated onto the outer shell, the sealing surface sealing the threaded bore from an inner side of the outer shell.
Claim 8
Dependent Claim
40 words
The joint socket of claim 6 wherein the threaded bore includes a counter-sink and the threaded plug has a portion flush with the counter-sink, the sealing surface of the threaded plug being formed at said portion of the press shoulder.
Claim 9
Dependent Claim
123 words
A hip joint prosthesis comprising: a joint having a ball; and a joint socket comprising: an outer shell adapted for being anchored into a bone seat, the outer shell defining a polar region and a equatorial region and having a perforated threaded bore for receiving a driver tool; an inner shell receiving the ball of the joint; a threaded plug threadably coupled within the threaded bore for sealing the threaded bore from the bone seat, the threaded plug having an axial recess opening towards the inner shell; and a projection extending from the polar region of the inner shell and having a center portion projecting into the axial recess of the threaded plug to center the inner shell relative to the outer shell.
Claim 10
Dependent Claim
123 words
A hip joint prosthesis comprising: a joint having a ball; and a joint socket comprising: an outer shell adapted for being anchored into a bone seat, the outer shell defining a polar region and a equatorial region and having a perforated threaded bore for receiving a driver tool; an inner shell receiving the ball of the joint; a threaded plug threadably coupled within the threaded bore for sealing the threaded bore from the bone seat, the threaded plug having an axial recess opening towards the inner shell; and a projection extending from the polar region of the inner shell and having a center portion projecting into the axial recess of the threaded plug to center the inner shell relative to the outer shell.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-10 | 2000-09-09 | 2001-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-10 | 2004-09-09 | 2005-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-10 | 2008-09-09 | 2009-03-11 | $7700.00 | Window Closed / Lapsed |