US4877019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intramedullary nail and apparatus for its insertion
Assignee: Individual
•
Filing: 1987-11-16
•
Granted: 1989-10-31
•
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 14:22
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.
References Cited (Backward Citations)
DE913228C
Cited
DE824239C
Cited
DE1930354A1
Cited
US3717146A
Cited
US4446857A
Cited
US4237875A
Cited
US4541424A
Cited
US4475545A
Cited
US4621628A
Cited
US4705027A
Cited
US4622959A
Cited
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 |