US5630814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener for external fixation device wires and pins
Assignee: Texas Scottish Rite Hospital for Children
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Filing: 1995-06-02
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Granted: 1997-05-20
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Expires: 2015-06-02
Abstract
Abstract A fastener for wires or pins used with an external fixation device to rigidly immobilize bone fragments during linear or angular distraction thereof includes a fixation bolt with either a transverse asymmetrical shank bore, or a transversely slotted bolthead for providing multiple contact surfaces to secure the wires or pins, regardless of their diameters. Alternatively, the fastener can include a washer or a threaded washer-like member having nonparallel opposing planar surfaces with a transverse slot in one. The transverse slots in the bolthead, washer and/or threaded washer-like member preferably include multiple cavities so as to increase the number of surfaces for contacting the wires or pins.
Inventors
- 👤 John D. Ross, Jr.
- 👤 Mikhail L. Samchukov
- 👤 John G. Birch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:24
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/60; A61B17/62; A61B17/66
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
199 words
In combination, an external fixation device frame member and a fixation wire fastening assembly, the fixation wire fastening assembly comprising: an elongate first fastener member including first and second ends and a shaft therebetween disposed collinearly along a longitudinal shaft axis, wherein said shaft includes a shaft circumference, said shaft further disposed to be selectively rotated in situ about said shaft axis when said shaft is operationally received into a corresponding void in said external fixation device frame member; a fastener head on said first end of said elongate first fastener member, wherein said fastener head includes a head circumference which is larger than said shaft circumference, said fastener head further disposed to allow torque to be applied to said first fastener member so as to enable said in situ rotation of said shaft; a noncircular bore in said shaft including a bore axis disposed nonparallelly to said longitudinal shaft axis, wherein said noncircular bore includes a minimum radius and a maximum radius, and said maximum radius is directed generally toward said first end of said elongate first fastener member; and engagement means on said second end of said elongate first fastener member for engaging a second fastener member.
Claim 2
Dependent Claim
199 words
In combination, an external fixation device frame member and a fixation wire fastening assembly, the fixation wire fastening assembly comprising: an elongate first fastener member including first and second ends and a shaft therebetween disposed collinearly along a longitudinal shaft axis, wherein said shaft includes a shaft circumference, said shaft further disposed to be selectively rotated in situ about said shaft axis when said shaft is operationally received into a corresponding void in said external fixation device frame member; a fastener head on said first end of said elongate first fastener member, wherein said fastener head includes a head circumference which is larger than said shaft circumference, said fastener head further disposed to allow torque to be applied to said first fastener member so as to enable said in situ rotation of said shaft; a noncircular bore in said shaft including a bore axis disposed nonparallelly to said longitudinal shaft axis, wherein said noncircular bore includes a minimum radius and a maximum radius, and said maximum radius is directed generally toward said first end of said elongate first fastener member; and engagement means on said second end of said elongate first fastener member for engaging a second fastener member.
Claim 3
Dependent Claim
26 words
A combination external fixation device frame member and fixation wire fastening assembly as recited in claim 1, wherein said elongate first fastener member comprises a bolt.
Claim 4
Dependent Claim
25 words
A combination external fixation device frame member fixation wire and fastening assembly as recited in claim 1, wherein said noncircular bore comprises a teardrop-shaped hole.
Claim 5
Dependent Claim
35 words
A combination external fixation device frame member fixation wire and fastening assembly as recited in claim 1, wherein said engagement means comprises external threads for engaging an internally threaded member as said second fastener member.
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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) | 2000-05-19 | 2000-11-18 | 2001-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-19 | 2004-11-18 | 2005-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-19 | 2008-11-18 | 2009-05-20 | $7700.00 | Window Closed / Lapsed |