US5766263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Femur endoprosthesis for artificial hip joint
Assignee: Eska Implants GmbH and Co KG
•
Filing: 1997-01-14
•
Granted: 1998-06-16
•
Expires: 2017-01-14
Abstract
Abstract A femur endoprosthesis for an artificial hip joint includes (a) a shell (1) which can be implanted without cement in the upper region of a femur below the greater trochanter, the proximal end (8) of the shell being connectable with an adapter (2) for accommodating an artificial spherical joint part (20), wherein the exterior of the shell is at least partially covered with an open-meshed three-dimensional spatial lattice structure (9), and (b) a draw plate (3) in which a draw-in screw (4) can be fastened, which can be inserted in the interior of the shell through a through bore (5) in its distal end (6), and which can be screwed in with a thread (7) provided therein.
Inventors
- 👤 Hans Grundei
- 👤 Jorg Scholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:23
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61F2/32; A61F2/36; A61F2/3601; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/80; A61F2/30721; A61F2/30749; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/30199; A61F2002/30205; A61F2002/3021; A61F2002/30217; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30339; A61F2002/30405; A61F2002/30433; A61F2002/30535; A61F2002/30604; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/3079; A61F2002/30795; A61F2002/30797; A61F2002/30878; A61F2002/30897; A61F2002/30909; A61F2002/30919; A61F2002/3092; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2002/365; A61F2/46; A61F2002/4635; A61F2220/00; A61F2220/0008; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2230/0063; A61F2230/0067
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
122 words
A femur endoprosthesis for an artificial hip joint, comprising: a shell (1) which can be implanted without cement in an upper region of a femur below its greater trochanter, a proximal end (8) of the shell being connected with an adapter (2) for accommodating an artificial spherical joint part (20), wherein an exterior of the shell is at least partially covered with an open-meshed three-dimensional spatial lattice structure (9), and a draw plate (3) through which a draw-in screw (4) is fastened, the draw-in screw being inserted in an interior of the shell through a through bore (5) in a distal end (6) of the shell and being screwed directly into the shell interior with a thread (7) provided in the shell.
Claim 2
Dependent Claim
122 words
A femur endoprosthesis for an artificial hip joint, comprising: a shell (1) which can be implanted without cement in an upper region of a femur below its greater trochanter, a proximal end (8) of the shell being connected with an adapter (2) for accommodating an artificial spherical joint part (20), wherein an exterior of the shell is at least partially covered with an open-meshed three-dimensional spatial lattice structure (9), and a draw plate (3) through which a draw-in screw (4) is fastened, the draw-in screw being inserted in an interior of the shell through a through bore (5) in a distal end (6) of the shell and being screwed directly into the shell interior with a thread (7) provided in the shell.
Claim 3
Dependent Claim
26 words
The femur endoprosthesis according to claim 1, wherein the shell (1) is constructed as tapering conically from its proximal end (8) to its distal end (6).
Claim 4
Dependent Claim
37 words
The femur endoprosthesis according to claim 1, wherein the spatial lattice structure (9) is constructed with a coarse mesh having mesh widths between 3 and 6 mm on shell exterior sides facing in caudal and cranial directions.
Claim 5
Dependent Claim
35 words
Femur endoprosthesis according to claim 1, wherein the spatial lattice structure (9) is constructed with a fine mesh having mesh widths between 1 and 2.5 mm in ventral and dorsal directions on the shell exterior.
Claim 6
Dependent Claim
57 words
The femur endoprosthesis according to claim 1, wherein the adapter (2) for a spherical joint part is constructed essentially as a double plug cone (10, 10') having an annular rotating flange (11) on bases of the two cones and wherein a correspondingly constructed conical plug socket (12) is provided in the proximal area of the shell (1).
Claim 7
Dependent Claim
54 words
The femur endoprosthesis according to claim 5, wherein a blind bore (13) having an internal thread (14) is provided in the plug cone (10) of the adapter (2) facing the shell (1) with which an end of the draw-in screw (4), equipped with a corresponding thread section (14'), can be engaged in for arrestation.
Claim 8
Dependent Claim
35 words
The femur endoprosthesis according to claim 6, wherein the thread section (14') at the end of the draw-in screw (4) has a different pitch than the thread (7) in the interior of the shell (1).
Claim 9
Dependent Claim
29 words
The femur endoprosthesis according to claim 5, wherein outward facing surfaces of the flange (11) of the adapter (2) are covered with an open-meshed three-dimensional spatial lattice structure (16).
Claim 10
Dependent Claim
27 words
The femur endoprosthesis according to claim 1, wherein surfaces of the draw plate (3) facing the femur are covered with an open-meshed three-dimensional spatial lattice structure (17).
Claim 11
Dependent Claim
60 words
The femur endoprosthesis according to claim 1, wherein the draw plate (3) is equipped with at least one abutment in a form of a peg (18) pointing toward the femur, which essentially forms a same angle α with the draw plate (3) as a main axis of the shell (1) with a main axis of the compression of plate (3).
Claim 12
Dependent Claim
158 words
A femur endoprosthesis kit for an artificial hip joint, comprising: a shell (1) which can be implanted without cement in an upper region of a femur below its greater trochanter, a proximal end (8) of the shell being connectable with an adapter (2) for accommodating an artificial spherical joint part (20), the shell including an exterior which is at least partially covered with an open-meshed three-dimensional spatial lattice structure (9); a draw plate (3) adapted to be mounted on an opposite side of the femur from the shell; and a draw-in screw (4) which is adapted to be fastened through the draw plate and inserted in an interior of the shell through a through bore (5) in a distal end (6) of the shell such that the draw-in screw can be screwed directly into a thread provided in the shell interior in order to draw the shell into an implantated position during surgery to install the femur endoprosthesis.
Claim 13
Dependent Claim
158 words
A femur endoprosthesis kit for an artificial hip joint, comprising: a shell (1) which can be implanted without cement in an upper region of a femur below its greater trochanter, a proximal end (8) of the shell being connectable with an adapter (2) for accommodating an artificial spherical joint part (20), the shell including an exterior which is at least partially covered with an open-meshed three-dimensional spatial lattice structure (9); a draw plate (3) adapted to be mounted on an opposite side of the femur from the shell; and a draw-in screw (4) which is adapted to be fastened through the draw plate and inserted in an interior of the shell through a through bore (5) in a distal end (6) of the shell such that the draw-in screw can be screwed directly into a thread provided in the shell interior in order to draw the shell into an implantated position during surgery to install the femur endoprosthesis.
References Cited (Backward Citations)
US2682265A
Cited
US4129903A
Cited
DE2724234C2
Cited
DE3017953A1
Cited
EP0099167A1
Cited
GB2166359A
Cited
EP0230006A1
Cited
DE3607824A1
Cited
US4795473A
Cited
FR2617706A1
Cited
FR2626169A1
Cited
WO1989011837A1
Cited
US4938772A
Cited
US4976740A
Cited
US5178201A
Cited
FR2674122A1
Cited
WO1993001769A1
Cited
EP0561263A1
Cited
US5433750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-15 | 2001-12-15 | 2002-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-15 | 2005-12-15 | 2006-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-15 | 2009-12-15 | 2010-06-16 | $7700.00 | Window Closed / Lapsed |