US4622959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-use femoral intramedullary nail
Assignee: MARCUS RANDALL E
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Filing: 1985-03-05
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Granted: 1986-11-18
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Expires: 2005-03-05
Abstract
Abstract An intramedullary nail for use in fractures of the left or right femur includes a body having a head, an intermediate portion and a distal tip. Transverse openings are provided in the body near the distal tip and in the head for receiving locking screws. One opening in the head has its axis within the femoral neck and another opening has its axis generally transverse thereto. The nail head has a seat with a transverse locating slot for securing a screw insertion tool in a fixed angular position in which a screw guide on the tool is aligned with one of the screw receiving openings.
Inventors
- 👤 Randall E. Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:10
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1721; A61B17/1725; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/7283
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
197 words
An intramedullary nail for use in fractures of the femur comprising, an elongated unitary body having a head, an intermediate body portion, and a distal tip, said body having an axial opening therein extending through said head and into said intermediate body portion, said nail being insertable into the medullary canal of a femur to a position in which said distal tip is in the distal femur region and said head is in the intertrochanteric femur region, a first transverse screw receiving opening in said body near said distal tip, a second screw receiving opening in said head having its axis within the femoral neck, and a third screw receiving opening in said head having an axis generally transverse to the axis of the femoral neck and crossing the axis of the second opening, means for securing an inserting tool to said head for inserting the nail in a femur, and means on said head defining a line having a predetermined fixed angular relation to the axis of each of said screw receiving openings for accurately locating a guide of a tool circumferentially and axially of the nail in precise axial alignment with any of said openings.
Claim 2
Dependent Claim
197 words
An intramedullary nail for use in fractures of the femur comprising, an elongated unitary body having a head, an intermediate body portion, and a distal tip, said body having an axial opening therein extending through said head and into said intermediate body portion, said nail being insertable into the medullary canal of a femur to a position in which said distal tip is in the distal femur region and said head is in the intertrochanteric femur region, a first transverse screw receiving opening in said body near said distal tip, a second screw receiving opening in said head having its axis within the femoral neck, and a third screw receiving opening in said head having an axis generally transverse to the axis of the femoral neck and crossing the axis of the second opening, means for securing an inserting tool to said head for inserting the nail in a femur, and means on said head defining a line having a predetermined fixed angular relation to the axis of each of said screw receiving openings for accurately locating a guide of a tool circumferentially and axially of the nail in precise axial alignment with any of said openings.
Claim 3
Dependent Claim
31 words
An intramedullary nail according to claim 1 wherein the axes of each of said screw receiving openings are substantially in a common vertical plane passing through the axis of the nail.
Claim 4
Dependent Claim
23 words
An intramedullary nail according to claim 1 comprising at least two transverse parallel screw receiving openings in the region of said distal tip.
Claim 5
Dependent Claim
19 words
An intramedullary nail according to claim 1 wherein each of said screw receiving openings comprises an internally threaded opening.
Claim 6
Dependent Claim
36 words
An intramedullary nail according to claim 1 wherein said means for securing a tool to said head comprises internal threads in the axial opening in said head, and a seat for the tool on said head.
Claim 7
Dependent Claim
17 words
An intradmedullary nail according to claim 1 wherein said head comprises a head of circular exterior configuration.
Claim 8
Dependent Claim
18 words
An intramedullary nail according to claim 1 wherein said distal tip comprises a tapered end of the nail.
Claim 9
Dependent Claim
19 words
An intramedullary nail according to claim 1 wherein said intermediate body portion is of clover-leaf section along its length.
Claim 10
Dependent Claim
40 words
An intramedullary nail according to claim 1 wherein said nail curves anteriorly, said openings in said head have their axes in a common plane, and said openings in said head are symmetrical about a plane normal to said common plane.
Claim 11
Dependent Claim
53 words
An intramedullary nail according to claim 1 including a seat for a tool on said head, said seat having a transverse locating slot therein, the axis of said slot having a predetermined fixed angular relation to the axis of each of said screw receiving openings, said slot comprising said tool guide locating means.
Claim 12
Dependent Claim
27 words
An intramedullary nail according to claim 10 wherein said slot further comprises means for accurately locating a driver tool in a predetermined angular position on said head.
Claim 13
Dependent Claim
20 words
An intramedullary nail according to claim 1 wherein said intermediate body portion has a continuous circumferential sidewall throughout its length.
Claim 14
Dependent Claim
99 words
An intramedullary nail according to claim 1 in combination with a tool for aligning a screw guide with the axis of one of said screw receiving openings, said tool comprising a head engaged with the head of said nail in a predetermined fixed angular relation, a member extending from said tool head and connected thereto in fixed angular relation, a screw guide carried by said member extending toward said nail, the angular relation of said tool head to said nail head being such that said screw guide is aligned with the axis of one of said screw receiving openings.
Claim 15
Dependent Claim
56 words
A combination according to claim 13 including a seat for said tool on said nail head, said seat having a transverse locating slot, and a projection on said tool head engaged with said slot to position said tool head so that said screw guide is aligned with the axis of one of said screw receiving openings.
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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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |