US3903549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetabular cup prosthesis component for total or subtotal hip prosthesis system
Assignee: Individual
•
Filing: 1974-06-12
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Granted: 1975-09-09
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Expires: 1994-06-12
Abstract
Abstract An acetabular cup prosthesis assembly for total or subtotal hip replacement, including a metallic, unitary cup member having a dome portion defining a socket larger than the head of the femur or femoral prosthesis component to be accommodated, and including an integral flange rim to seat against the acetabulum and be secured thereto by screws. The cup has sharp edged fins to be seated in the acetabulum and restraining ribs on the interior surface of the socket. A replaceable plastic liner insert of hemispheric configuration interfits in the socket and has grooves shaped to provide a snap fit with the restraining ribs.
Inventors
- 👤 William Minor Deyerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:28
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; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30378; A61F2002/30383; A61F2002/30403; A61F2002/30476; A61F2002/305; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/30841; A61F2002/30878; A61F2002/30879; A61F2002/30884; A61F2002/3401; A61F2002/3412; A61F2002/3417; A61F2002/3429; A61F2002/3432; A61F2220/00; A61F2220/0025; A61F2220/0033
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
367 words
An acetabular cup prosthesis assembly to be fixed on the acetabulum of a patient in connection with total or sub-total hip prosthesis surgery, comprising an integral unitary metal cup prosthesis component and a replaceable liner insert, the cup prosthesis component having a dome portion extending in a hemispherical path from a proximal end plane of the prosthesis formed of a substantially hemispherical metal wall having a convex spherical outer surface and a concave spherical inner surface defining a generally hemispherical cup socket having an entrance opening at said proximal end plane and having a diameter of predetermined greater size than the head of an associated femur or femoral prosthesis component to be located in said cup socket, said cup prosthesis component also including an annular rim flange extending radially outwardly from the end of said hemispherical metal wall at said proximal end plane defining an integral annular ring portion encircling said entrance opening to abut against surface portions of a recipient acetabulum and be secured thereto to locate and aid in supporting the cup prosthesis thereon, said dome portion including rotation and tilting resisting and liner retaining rib formations protruding radially inwardly from said spherical inner surface, said rib formations being formed of a pair of semicurclar ribs spanning the cup socket along meridians disposed in a pair of diametric planes intersecting at the zenith of the inner surface of said wall defining patterns of meridian rib segments extending from the entrance opening to the zenith intersection to present surfaces to the liner resisting tilting and rotation thereof in the socket and for frictionally retaining the liner seated in the socket, and the replaceable liner insert being formed of an integral molded body of plastic material of generally hemispherical configuration interfitted in said cup socket having an outer spherical surface conforming closely to the size and complementing the configuration of the inner spherical surface and meridian rib segments of the dome portion to restrain the liner insert in said cup socket by tight frictional interengagement therewith, and said liner insert having a concave spherical inner surface defining a liner socket of a diameter corresponding to the heads of the femur or femoral prosthesis to be located therein.
Claim 2
Dependent Claim
367 words
An acetabular cup prosthesis assembly to be fixed on the acetabulum of a patient in connection with total or sub-total hip prosthesis surgery, comprising an integral unitary metal cup prosthesis component and a replaceable liner insert, the cup prosthesis component having a dome portion extending in a hemispherical path from a proximal end plane of the prosthesis formed of a substantially hemispherical metal wall having a convex spherical outer surface and a concave spherical inner surface defining a generally hemispherical cup socket having an entrance opening at said proximal end plane and having a diameter of predetermined greater size than the head of an associated femur or femoral prosthesis component to be located in said cup socket, said cup prosthesis component also including an annular rim flange extending radially outwardly from the end of said hemispherical metal wall at said proximal end plane defining an integral annular ring portion encircling said entrance opening to abut against surface portions of a recipient acetabulum and be secured thereto to locate and aid in supporting the cup prosthesis thereon, said dome portion including rotation and tilting resisting and liner retaining rib formations protruding radially inwardly from said spherical inner surface, said rib formations being formed of a pair of semicurclar ribs spanning the cup socket along meridians disposed in a pair of diametric planes intersecting at the zenith of the inner surface of said wall defining patterns of meridian rib segments extending from the entrance opening to the zenith intersection to present surfaces to the liner resisting tilting and rotation thereof in the socket and for frictionally retaining the liner seated in the socket, and the replaceable liner insert being formed of an integral molded body of plastic material of generally hemispherical configuration interfitted in said cup socket having an outer spherical surface conforming closely to the size and complementing the configuration of the inner spherical surface and meridian rib segments of the dome portion to restrain the liner insert in said cup socket by tight frictional interengagement therewith, and said liner insert having a concave spherical inner surface defining a liner socket of a diameter corresponding to the heads of the femur or femoral prosthesis to be located therein.
Claim 3
Dependent Claim
36 words
An acetabular cup prosthesis assembly as defined in claim 1, wherein said diametric planes of the semicircular meridian ribs are located at right angles to each other whereby said meridian rib segments define a cruciate pattern.
Claim 4
Dependent Claim
83 words
An acetabular cup prosthesis assembly as defined in claim 2, wherein said meridian rib segments are continuous uninterrupted ribs of uniform height and thickness throughout their extent from said entrance opening to the zenith of the inner surface of said wall, the ribs thereby defining diametric planes along which the liner may be cut, subdividing the liner into four quadrants for ease of removal from the socket without having to cut through the full thickness of the liner portions intervening between rib segments.
Claim 5
Dependent Claim
90 words
An acetabular cup prosthesis assembly as defined in claim 1, wherein fin formations of truncated crescent configuration in profile are located in quadrature relation about the outer surface of the hemispherical wall with the truncated end edges of the fin formations integrally joined to said annular rim flange and extending outwardly from said wall to the outer periphery of said annular rim flange, the outer edges of the fin formations extending along outwardly convex arcs and merging into said convex spherical outer surface of said wall adjacent the zenith thereof.
Claim 6
Dependent Claim
130 words
An acetabular cup prosthesis assembly as defined in claim 1 wherein said meridian rib segments are continuous uninterrupted ribs of uniform rectangular cross section throughout and of uniform height and thickness throughout their extent from said entrance opening to the zenith of the inner surface of said wall, the ribs thereby defining diametric planes along which the liner may be cut, subdividing the liner into four quadrants for ease of removal from the socket without having to cut through the full thickness of the liner portions intervening between said rib segments and said outer spherical surface of said liner iNsert having grooves therein of uniform rectangular cross section closely conforming to the cross section and configuration of said meridian rib segments to receive the latter in tightly interfitted relation therein.
Claim 7
Dependent Claim
65 words
An acetabular cup prosthesis assembly as defined in claim 1, wherein said dome portion includes a plurality of circumferentially spaced, outwardly extending fin formations projecting from the outer concave surface thereof and having sharp outer edges extending in diametric planes of the hemisphere defined by said metal wall to be forced into the bone structure of the acetabulum at plural locations surrounding the dome portion.
Claim 8
Dependent Claim
54 words
An acetabular cup prosthesis assembly as defined in claim 1, wherein the outer spherical surface of said liner insert includes grooves formed therein precisely conforming to said inwardly extending elongated ribs on the inner surface of said wall and shaped to provide a snap fit therewith frictionally restraining the insert in the cup socket.
Claim 9
Dependent Claim
54 words
An acetabular cup prosthesis assembly as defined in claim 2, wherein the outer spherical surface of said liner insert includes grooves formed therein precisely conforming to said inwardly extending elongated ribs on the inner surface of said wall and shaped to provide a snap fit therewith frictionally restraining the insert in the cup socket.
Claim 10
Dependent Claim
54 words
An acetabular cup prosthesis assembly as defined in claim 3, wherein the outer spherical surface of said liner insert includes grooves fomred therein precisely conforming to said inwardly extending elongated ribs on the inner surface of said wall and shaped to provide a snap fit therewith frictionally restraining the insert in the cup socket.
Claim 11
Dependent Claim
78 words
An acetabular cup prosthesis assembly as defined in claim 1, wherein said liner insert has an incident annular planar face spaced outwardly a slight distance from said proximal end plane surrounding an entrance opening for said liner socket, said spherical inner surface of said insert having its center in the plane of said planar face and said outer spherical surface of said insert having its center spaced toward the zenith of said cup socket from said planar face.
Claim 12
Dependent Claim
79 words
An acetabular cup prosthesis assembly as defined in claim 3, wherein said liner insert has an incident annular planar face spaced outwardly a slight distance from said proximal end plane surrounding an entrance opening for said liner socket, and the spherical inner surface of said insert having its center in the plane of said planar face and said outer spherical surface of said insert having its center spaced toward the zenith of said cup socket from said planar face.
Claim 13
Dependent Claim
78 words
An acetabular cup prosthesis assembly as defined in claim 4, wherein said liner insert has an incident annular planar face spaced outwardly a slight distance from said proximal end plane surrounding an entrance opening for said liner socket, said spherical inner surface of said insert having its center in the plane of said planar face and said outer spherical surface of said insert having its center spaced toward the zenith of said cup socket from said planar face.
Claim 14
Dependent Claim
78 words
An acetabular cup prosthesis assembly as defined in claim 7, wherein said liner insert has an incident annular planar face spaced outwardly a slight distance from said proximal end plane surrounding an entrance opening for said inner socket, said spherical liner surface of said insert having its center in the plane of said planar face and said outer spherical surface of said insert having its center speced toward the zenith of said cup socket from said planar face.
Claim 15
Dependent Claim
61 words
An acetabular cup prosthesis assembly as defined in claim 1, wherein said cup prosthesis has a plurality of screw holes solely located in said annular rim flange in a circumferential path spaced radially outwardly from the periphery of said liner for receiving fixation screws to extend into the recipient acetabulum of the patient for fixation of the cup prosthesis component thereon.
Claim 16
Dependent Claim
61 words
An acetabular cup prosthEsis assembly as defined in claim 3, wherein said cup prosthesis has a plurality of screw holes solely located in said annular rim flange in a circumferential path spaced radially outwardly from the periphery of said liner for receiving fixation screws to extend into the recipient acetabulum of the patient for fixation of the cup prosthesis component thereon.
Claim 17
Dependent Claim
61 words
An acetabular cup prosthesis assembly as defined in claim 7, wherein said cup prosthesis has a plurality of screw holes solely located in said annular rim flange in a circumferential path spaced radially outwardly from the periphery of said liner for receiving fixation screws to extend into the recipient acetabulum of the patient for fixation of the cup prosthesis component thereon.
References Cited (Backward Citations)
US3840904A
Cited
US3816854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |