US5490855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to stabilze a cutting means for the fitting of a prosthesis in bone surgery
Assignee: Developpement dImplants Orthopediques et Medicaux
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Filing: 1994-01-27
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Granted: 1996-02-13
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Expires: 2014-01-27
Abstract
Abstract A device for the axial stabilization of a cutting means, used to make at least one cut at one end of a bone with a view to the fitting of a prosthesis in bone surgery. It includes an axial centering rod that is introduced partially into the intramedullar canal of said bone and is designed to receive said one cutting means. The centering rod is provided with an anchoring thread so as to form a anchor bolt that is axially stabilized in a direction parallel to the axis of the rod. A clamping device is mounted to the rod and axially clamps the cutting means inst the bone.
Inventors
- 👤 Jean-Pierre Bouraly
- 👤 Jurg Aebi
- 👤 Philippe Beaufils
- 👤 Michel de Lestang
- 👤 Jean-Gilles Gaffuri
- 👤 Herve Hourlier
- 👤 Jean-Jacques Lallement
- 👤 Philippe Legroux
- 👤 Jean-Paul Levai
- 👤 Gerald Pondaven
- 👤 Pierre Schuster
- 👤 Christian Vergnat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:35
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/155; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/84; A61B17/86
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
An axially stabilized apparatus used for cutting the end of a bone in preparation of fitting a prosthesis during bone surgery, comprising: a removable centering rod for partial insertion into an intramedullar canal of the bone; a first threaded portion formed only on an intermediate section of the rod for threaded anchoring engagement with a proximal end of the bone canal, that axially stabilizes the rod; a cutting block slidably mounted to an axial external intermediate extension of the centering rod, at a point outwardly adjacent a proximal end of the bone; and threaded fastener means mounted on an outward axial end portion of the centering rod, having a second threaded portion for exerting a clamping force, axial with the rod, to clamp the block against the bone.
Claim 2
Dependent Claim
128 words
An axially stabilized apparatus used for cutting the end of a bone in preparation of fitting a prosthesis during bone surgery, comprising: a removable centering rod for partial insertion into an intramedullar canal of the bone; a first threaded portion formed only on an intermediate section of the rod for threaded anchoring engagement with a proximal end of the bone canal, that axially stabilizes the rod; a cutting block slidably mounted to an axial external intermediate extension of the centering rod, at a point outwardly adjacent a proximal end of the bone; and threaded fastener means mounted on an outward axial end portion of the centering rod, having a second threaded portion for exerting a clamping force, axial with the rod, to clamp the block against the bone.
Claim 3
Dependent Claim
25 words
The apparatus set forth in claim 1 wherein the ratio of the thread thickness of the threaded portion, to its pitch, is less than 25%.
Claim 4
Dependent Claim
132 words
An axially stabilized apparatus used for cutting the end of a bone in preparation of fitting a prosthesis during bone surgery, comprising: a centering rod for partial insertion into an intramedullar canal of the bone; a threaded portion formed on an intermediate section of the rod for threaded anchoring engagement with a proximal end of the bone canal, that axially stabilizes the rod; a cutting block slidably mounted to the centering rod, at a point outwardly adjacent a proximal end of the bone; and means mounted on an outward end portion of the centering rod for axially clamping the block against the bone; wherein the threaded rod portion has a length less than 50% of the overall rod length, and sufficient diameter to secure the centering rod axially immobilized in the bone.
Claim 5
Dependent Claim
132 words
An axially stabilized apparatus used for cutting the end of a bone in preparation of fitting a prosthesis during bone surgery, comprising: a centering rod for partial insertion into an intramedullar canal of the bone; a threaded portion formed on an intermediate section of the rod for threaded anchoring engagement with a proximal end of the bone canal, that axially stabilizes the rod; a cutting block slidably mounted to the centering rod, at a point outwardly adjacent a proximal end of the bone; and means mounted on an outward end portion of the centering rod for axially clamping the block against the bone; wherein the threaded rod portion has a length less than 50% of the overall rod length, and sufficient diameter to secure the centering rod axially immobilized in the bone.
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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) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |