US4936861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetabular cup prosthesis
Assignee: Protek AG
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Filing: 1988-10-07
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Granted: 1990-06-26
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Expires: 2008-10-07
Abstract
Abstract The plastic cup-comprising member and the hemispherical shell of the two-part acetabular cup prosthesis are secured relative to one another in snap-fitted manner. The plastic member is centered and guided during pressing-in via a centering pin and concentric annular web on the plastic member. The annular web is also locally deformable so as to deform against a screw head during pressing-in without the annular web losing its centering guiding action.
Inventors
- 👤 Maurice E. Muller
- 👤 Otto Frey
- 👤 Roland Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/46; A61F2/4603; A61F2/4609; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30337; A61F2002/30405; A61F2002/30476; A61F2002/305; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30593; A61F2002/3401; A61F2002/3403; A61F2002/3412; A61F2002/3414; A61F2002/3429; A61F2002/3435; A61F2220/00; A61F2220/0025; A61F2220/0033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
An acetabular cup prosthesis comprising a hemispherical shell having a plurality of openings for passage of bone screws therethrough to anchor said shell in a pelvis and a centrally disposed guide; and a plastic member having a cup for receiving a head of a joint, means for snap-fitting of said member coaxially in said shell and a thin-walled annular web extending into said guide of said shell coaxially of said shell with a longitudinal extent extending, said web being locally deformable during fitting of said member into said shell.
Claim 2
Dependent Claim
89 words
An acetabular cup prosthesis comprising a hemispherical shell having a plurality of openings for passage of bone screws therethrough to anchor said shell in a pelvis and a centrally disposed guide; and a plastic member having a cup for receiving a head of a joint, means for snap-fitting of said member coaxially in said shell and a thin-walled annular web extending into said guide of said shell coaxially of said shell with a longitudinal extent extending, said web being locally deformable during fitting of said member into said shell.
Claim 3
Dependent Claim
33 words
An acetabular cup prosthesis as set forth in claim 1 wherein said plastic member has a centering pin concentric to said annular web and said shell has a central bore receiving said pin.
Claim 4
Dependent Claim
30 words
An acetabular cup prosthesis as set forth in claim 1 wherein said openings in said shell are concentrated near a main loading direction between two meridian circles of said shell.
Claim 5
Dependent Claim
104 words
An acetabular cup prosthesis comprising a hemispherical shell having a centrally disposed recess and a plurality of openings for passage of bone screws therethrough, at least one of said openings being in communication with said recess; and a plastic member having a cup for receiving a joint head, means for snap-fitting of said member coaxially in said shell and a thin-walled annular web with a longitudinal extent extending into said shell with a portion of said web aligned with said one opening, said web portion being deformable against a bone screw projecting from said one opening upon fitting of said member in said shell.
Claim 6
Dependent Claim
104 words
An acetabular cup prosthesis comprising a hemispherical shell having a centrally disposed recess and a plurality of openings for passage of bone screws therethrough, at least one of said openings being in communication with said recess; and a plastic member having a cup for receiving a joint head, means for snap-fitting of said member coaxially in said shell and a thin-walled annular web with a longitudinal extent extending into said shell with a portion of said web aligned with said one opening, said web portion being deformable against a bone screw projecting from said one opening upon fitting of said member in said shell.
Claim 7
Dependent Claim
33 words
An acetabular cup prosthesis as set forth in claim 4 wherein said plastic member has a centering pin concentric to said annular web and said shell has a central bore receiving said pin.
Claim 8
Dependent Claim
110 words
An acetabular cup prosthesis comprising a hemispherical shell having a centrally disposed cylindrical recess and a plurality of openings for passage of bone screws therethrough, at least one of said openings being in communication with said recess; and a plastic member having a cup for receiving a joint head, means for snap-fitting of said member coaxially in said shell and a thin-walled annular web with a longitudinal extent extending coaxially into said recess of said shell with a portion of said web aligned with one of said passages, said web portion being deformable against a bone screw projecting from said one passage upon fitting of said member in said shell.
Claim 9
Dependent Claim
110 words
An acetabular cup prosthesis comprising a hemispherical shell having a centrally disposed cylindrical recess and a plurality of openings for passage of bone screws therethrough, at least one of said openings being in communication with said recess; and a plastic member having a cup for receiving a joint head, means for snap-fitting of said member coaxially in said shell and a thin-walled annular web with a longitudinal extent extending coaxially into said recess of said shell with a portion of said web aligned with one of said passages, said web portion being deformable against a bone screw projecting from said one passage upon fitting of said member in said shell.
Claim 10
Dependent Claim
33 words
An acetabular cup prosthesis as set forth in claim 6 wherein said plastic member has a centering pin concentric to said annular web and said shell has a central bore receiving said pin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |