US6235031B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intramedullary fracture fixation device
Assignee: DJO LLC
•
Filing: 2000-02-04
•
Granted: 2001-05-22
•
Expires: 2020-02-04
Abstract
Abstract An intramedullary fracture fixation device is provided which includes an intramedullary rod, a lag screw and a lag screw collar. The rod has a proximal end with a transverse bore extending therethrough. The lag screw has a distal end with coarse bone engaging thread elements and a proximal end with screw threads. When in use, the lag screw is substantially axially aligned with the transverse bore of the rod. The lag screw collar has an outer diameter sized to rotatably fit within the transverse bore of the rod. The collar also has an inner diameter and internal screw threads adapted to cooperate with the screw threads of the proximal end of the lag screw. The lag screw collar may have an increased outer diameter at one end thereof which is at least slightly larger than a diameter of the transverse bore of the rod. The device preferably includes a longitudinal bore which extends through the proximal end of the rod so as to open into the transverse bore. The longitudinal bore is preferably angularly offset with respect to a longitudinal axis of the proximal end of the rod. The device also preferably includes a set screw which is adapted to be secured within the longitudinal bore of the rod with a distal end thereof extending at least partially into the transverse bore of the rod so as to engage the collar when the collar is disposed within the transverse bore.
Inventors
- 👤 John D. Hodgeman
- 👤 Stephen C. Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/744
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
117 words
An intramedullary fracture fixation device, comprising: an intramedullary rod, the rod having distal and proximal ends, the proximal end having a transverse bore extending therethrough; a lag screw having distal and proximal ends, the distal end having one or more coarse bone-engaging elements, at least a portion of the lag screw other than the distal end having screw threads, the lag screw being substantially axially aligned with the transverse bore of the rod when in use; and a lag screw collar having an outer diameter sized to rotatably fit within the transverse bore of the rod, the collar having an inner diameter and internal screw threads adapted to cooperate with the screw threads of the lag screw.
Claim 2
Dependent Claim
117 words
An intramedullary fracture fixation device, comprising: an intramedullary rod, the rod having distal and proximal ends, the proximal end having a transverse bore extending therethrough; a lag screw having distal and proximal ends, the distal end having one or more coarse bone-engaging elements, at least a portion of the lag screw other than the distal end having screw threads, the lag screw being substantially axially aligned with the transverse bore of the rod when in use; and a lag screw collar having an outer diameter sized to rotatably fit within the transverse bore of the rod, the collar having an inner diameter and internal screw threads adapted to cooperate with the screw threads of the lag screw.
Claim 3
Dependent Claim
47 words
The device according to claim 1 , wherein the outer diameter of the collar is sized to substantially abut an inner wall of the transverse bore of the rod such that the collar acts as a centering device for the lag screw relative to the transverse bore.
Claim 4
Dependent Claim
18 words
The device according to claim 1 , wherein the collar includes at least one flattened outer engagement surface.
Claim 5
Dependent Claim
20 words
The device according to claim 3 , wherein the collar includes a plurality of circumferentially spaced flattened outer engagement surfaces.
Claim 6
Dependent Claim
22 words
The device according to claim 1 , wherein the collar includes at least one engagement groove formed on an outer surface thereof.
Claim 7
Dependent Claim
24 words
The device according to claim 5 , wherein the collar includes a plurality of circumferentially spaced engagement grooves formed on an outer surface thereof.
Claim 8
Dependent Claim
47 words
The device according to claim 1 , further comprising: a longitudinal bore extending through the proximal end of the rod so as to open into the transverse bore, the longitudinal bore being angularly offset with respect to a longitudinal axis of the proximal end of the rod.
Claim 9
Dependent Claim
150 words
An intramedullary fracture fixation device, comprising: an intramedullary rod, the rod having distal and proximal ends, the proximal end having a transverse bore extending therethrough; a lag screw having distal and proximal ends, the distal end having one or more coarse bone-engaging elements, at least a portion of the lag screw other than the distal end having screw threads, the lag screw being substantially axially aligned with the transverse bore of the rod when in use; and a lag screw collar having an outer diameter over at least a portion thereof which is sized to rotatably fit within the transverse bore of the rod and an increased outer diameter at one end thereof which is at least slightly larger than a diameter of the transverse bore of the rod, the collar having an inner diameter and internal screw threads adapted to cooperate with the screw threads of the lag screw.
Claim 10
Dependent Claim
150 words
An intramedullary fracture fixation device, comprising: an intramedullary rod, the rod having distal and proximal ends, the proximal end having a transverse bore extending therethrough; a lag screw having distal and proximal ends, the distal end having one or more coarse bone-engaging elements, at least a portion of the lag screw other than the distal end having screw threads, the lag screw being substantially axially aligned with the transverse bore of the rod when in use; and a lag screw collar having an outer diameter over at least a portion thereof which is sized to rotatably fit within the transverse bore of the rod and an increased outer diameter at one end thereof which is at least slightly larger than a diameter of the transverse bore of the rod, the collar having an inner diameter and internal screw threads adapted to cooperate with the screw threads of the lag screw.
Claim 11
Dependent Claim
47 words
The device according to claim 8 , wherein the outer diameter of the collar is sized to substantially abut an inner wall of the transverse bore of the rod such that the collar acts as a centering device for the lag screw relative to the transverse bore.
Claim 12
Dependent Claim
18 words
The device according to claim 8 , wherein the collar includes at least one flattened outer engagement surface.
Claim 13
Dependent Claim
20 words
The device according to claim 10 , wherein the collar includes a plurality of circumferentially spaced flattened outer engagement surfaces.
Claim 14
Dependent Claim
22 words
The device according to claim 8 , wherein the collar includes at least one engagement groove formed on an outer surface thereof.
Claim 15
Dependent Claim
24 words
The device according to claim 12 , wherein the collar includes a plurality of circumferentially spaced engagement grooves formed on an outer surface thereof.
Claim 16
Dependent Claim
50 words
The device according to claim 8 , further comprising: a longitudinal bore extending through the proximal end of the rod so as to open into the transverse bore of the rod, the longitudinal bore being angularly offset with respect to a longitudinal axis of the proximal end of the rod.
Claim 17
Dependent Claim
69 words
An intramedullary fracture fixation device, comprising: an intramedullary rod, the rod having distal and proximal ends; a transverse bore extending through the proximal end of the rod; and a longitudinal bore extending through the proximal end of the rod so as to open into the transverse bore of the rod, the longitudinal bore being angularly offset with respect to a longitudinal axis of the proximal end of the rod.
Claim 18
Dependent Claim
69 words
An intramedullary fracture fixation device, comprising: an intramedullary rod, the rod having distal and proximal ends; a transverse bore extending through the proximal end of the rod; and a longitudinal bore extending through the proximal end of the rod so as to open into the transverse bore of the rod, the longitudinal bore being angularly offset with respect to a longitudinal axis of the proximal end of the rod.
Claim 19
Dependent Claim
73 words
The device according to claim 15 , further comprising: a collar having an outer diameter sized to fit within the transverse bore of the rod; and a set screw which is adapted to be secured within the longitudinal bore of the rod with a distal end thereof extending at least partially into the transverse bore of the rod so as to engage the collar when the collar is disposed within the transverse bore.
Claim 20
Dependent Claim
43 words
The device according to claim 16 , wherein the collar includes at least one flattened outer engagement surface, the set screw being adapted to engage the engagement surface so as to prevent rotation of the collar within the transverse bore of the rod.
Claim 21
Dependent Claim
48 words
The device according to claim 17 , wherein the collar includes a plurality of circumferentially spaced flattened outer engagement surfaces, the set screw being adapted to engage any one of the engagement surfaces so as to prevent rotation of the collar within the transverse bore of the rod.
Claim 22
Dependent Claim
47 words
The device according to claim 16 , wherein the collar includes at least one engagement groove formed on an outer surface thereof, the set screw being adapted to engage the engagement groove so as to prevent rotation of the collar within the transverse bore of the rod.
Claim 23
Dependent Claim
52 words
The device according to claim 19 , wherein the collar includes a plurality of circumferentially spaced engagement grooves formed on an outer surface thereof, the set screw being adapted to engage any one of the engagement grooves so as to prevent rotation of the collar within the transverse bore of the rod.
References Cited (Backward Citations)
US3433220A
Cited
US4438762A
Cited
US4432358A
Cited
US4733664A
Cited
US4657001A
Cited
US4697585A
Cited
US4667664A
Cited
US4622959A
Cited
US4621629A
Cited
US4733654A
Cited
US4776330A
Cited
US4827917A
Cited
US5312406A
Cited
GB2209947A
Cited
US4805607A
Cited
EP0321170A1
Cited
US5176681A
Cited
US5032125A
Cited
US5454813A
Cited
US5531748A
Cited
US6126661A
Cited
US6123708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-21 | 2004-11-20 | 2005-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-21 | 2008-11-20 | 2009-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-21 | 2012-11-20 | 2013-05-22 | $7700.00 | Window Closed / Lapsed |