US4877019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intramedullary nail and apparatus for its insertion
Assignee: Individual
•
Filing: 1987-11-16
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Granted: 1989-10-31
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Expires: 2007-11-16
Abstract
Abstract An intramedullary nail comprises a tubular body (1) having a hexagonal cross section and is curved along its length from a proximal end to a distal end, with a frustoconically tapering portion (3) at the distal end. Adjacent the distal end portion (3) are a plurality of holes (6) and adjacent the proximal end are a plurality of slots (7) for receiving fixing screws or locking pins. A longitudinal slot is provided along one corner of the hexagonally shaped nail to increase the flexural elasticity of the nail in the longitudinal direction. A specific apparatus for use in insertion of the nail into the bone and for locating the holes in its ends is also disclosed.
Inventors
- 👤 Pierre Vives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1717; A61B17/1707; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61B17/7283; A61B17/1725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
An intramedullary nail, comprising an elongated tubular body of hexagonal cross section having a distal end and a proximal end, with a frustoconical taper at said distal end, said elongated tubular body further having a side wall including at least a hole therein adjacent said distal end and at least a slot adjacent said proximal end, wherein said elongated tubular body has a slot extending in a longitudinal direction of said tubular body and formed for a given length along a longitudinal corner defined by two adjoining sides of said hexagonal cross-section, said longitudinal slot being so designed and arranged as to increase flexural elasticity of said elongated tubular body in said longitudinal direction.
Claim 2
Dependent Claim
114 words
An intramedullary nail, comprising an elongated tubular body of hexagonal cross section having a distal end and a proximal end, with a frustoconical taper at said distal end, said elongated tubular body further having a side wall including at least a hole therein adjacent said distal end and at least a slot adjacent said proximal end, wherein said elongated tubular body has a slot extending in a longitudinal direction of said tubular body and formed for a given length along a longitudinal corner defined by two adjoining sides of said hexagonal cross-section, said longitudinal slot being so designed and arranged as to increase flexural elasticity of said elongated tubular body in said longitudinal direction.
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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) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |