US4051559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Total prosthesis of the hip
Assignee: Mahay et Cie
•
Filing: 1976-09-01
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Granted: 1977-10-04
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Expires: 1996-09-01
Abstract
Abstract A total prosthesis of the hip has a cotyloid portion to be inserted in the hip bone and a cephalic portion to be inserted in the femur, the cephalic portion fitting into the cotyloid portion, and the cephalic portion has a cylindrical helically threaded femoral shank portion to be screwed into the femur and a flat abutment surface perpendicular to the axis of the threaded portion for abutment against a correspondingly prepared surface of the bone.
Inventors
- 👤 Marc Laurent Pifferi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61F2/3662; A61F2/3676; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30146; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30362; A61F2002/30364; A61F2002/30367; A61F2002/30433; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30593; A61F2/30767; A61F2/30771; A61F2002/30795; A61F2002/30797; A61F2002/3085; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2002/3652; A61F2002/3678; A61F2002/3694; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0017
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
In a total prosthesis of the hip, comprising a cotyloid portion adapted to be inserted in the hip bone and a cephalic portion adapted to be inserted in the femur, the cephalic portion fitting into the cotyloid portion, the improvement in which said cephalic portion comprises a femoral part having a cylindrical externally helically threaded shank portion adapted to be screwed into the medullar canal of the femur and a cephalic part having a base member the underside of which having a flat diaphyseal resting and abutment surface adapted to abut against a bone surface prepared in corresponding manner, an arm on said base member terminating in a ball means for insertion into said cotyloid portion and a sleeve depending perpendicularly from and eccentric with respect to the diaphyseal resting surface, said sleeve fitting in a bore of the same cross section provided in said femoral part, and means for securing said femoral part to said cephalic part.
Claim 2
Dependent Claim
158 words
In a total prosthesis of the hip, comprising a cotyloid portion adapted to be inserted in the hip bone and a cephalic portion adapted to be inserted in the femur, the cephalic portion fitting into the cotyloid portion, the improvement in which said cephalic portion comprises a femoral part having a cylindrical externally helically threaded shank portion adapted to be screwed into the medullar canal of the femur and a cephalic part having a base member the underside of which having a flat diaphyseal resting and abutment surface adapted to abut against a bone surface prepared in corresponding manner, an arm on said base member terminating in a ball means for insertion into said cotyloid portion and a sleeve depending perpendicularly from and eccentric with respect to the diaphyseal resting surface, said sleeve fitting in a bore of the same cross section provided in said femoral part, and means for securing said femoral part to said cephalic part.
Claim 3
Dependent Claim
13 words
The prosthesis according to claim 1, wherein said diaphyseal resting surface is ovoid.
Claim 4
Dependent Claim
19 words
The prosthesis according to claim 1, wherein the sleeve is cylindrical and is fitted coaxially in said femoral part.
Claim 5
Dependent Claim
25 words
The prosthesis according to claim 1, wherein said securing means is a screw means passing through said sleeve and being screwed into the femoral part.
Claim 6
Dependent Claim
50 words
The prosthesis according to claim 4, wherein the cephalic portion includes cooperating means for preventing angular movement of the cephalic part relative to the femoral part, the assembly being locked in the selected angular position by said screw means passing through said sleeve and being screwed into the femoral part.
Claim 7
Dependent Claim
25 words
The prosthesis according to claim 5, wherein said cooperating means is provided by said sleeve and said recess being of substantially identical polygonal cross section.
Claim 8
Dependent Claim
32 words
The prosthesis according to claim 6, wherein said cooperating means further includes notches in one of the cephalic parts and the femoral part and mating teeth in the other of the parts.
Claim 9
Dependent Claim
119 words
A process for the putting in place of the total prosthesis of the hip of claim 1, wherein the medullar canal is tapped with a cylindrical, helical thread, the end of the femur is hollowed out and bored to form a recess having a flat surface corresponding to said diaphyseal surface that is perpendicular to the axis of the cylindrical thread, said axis being eccentric with respect to the flat surface, the femoral part is screwed into the cylindrically threaded medullar canal, the sleeve of the cephalic part is inserted into the bore of the femoral part, and the cephalic part is screwed into place with the disphyseal resting surface thereof firmly contacting said flat recess in the femur.
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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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |