Patent US5505731A successfully refreshed from Google Patents.
US5505731A
Expired / Lapsed
US
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Screw for lumbar-sacral fixator
Assignee: Tornier SAS
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Filing: 1994-08-26
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Granted: 1996-04-09
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Expires: 2014-08-26
Abstract
Abstract A screw for a lumbar-sacral fixator for use on the spine wherein the screw comprises a threaded part and a head which has a notched surface which is inclined with respect to an elongated axis of the screw by an angle of approximately 30° to 45°.
Inventors
- 👤 Alain Tornier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:21
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/70; A61B17/7055; A61B17/84; A61B17/86
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A screw for a lumbar-sacral fixator, comprising a threaded part and a head, the screw having an elongated axis, said head having a notched surface which is inclined with respect to the elongated axis and away from the threaded part by an angle of from about 30° to 45°, and said head defining a first tapped hole which extends perpendicularly to the notched surface and a second tapped hole which communicates with the first hole.
Claim 2
Dependent Claim
75 words
A screw for a lumbar-sacral fixator, comprising a threaded part and a head, the screw having an elongated axis, said head having a notched surface which is inclined with respect to the elongated axis and away from the threaded part by an angle of from about 30° to 45°, and said head defining a first tapped hole which extends perpendicularly to the notched surface and a second tapped hole which communicates with the first hole.
Claim 3
Dependent Claim
17 words
The screw of claim 1, wherein the threaded part has a conical core and a sharp thread.
Claim 4
Dependent Claim
19 words
The screw of claim 1, wherein the second hole extends generally parallel to the elongated axis of the screw.
Claim 5
Dependent Claim
15 words
The screw of claim 3, further comprising a set screw received within the second hole.
Claim 6
Dependent Claim
14 words
The screw of claim 4, further comprising a bolt received within the first hole.
Claim 7
Dependent Claim
17 words
The screw of claim 1, wherein the first hole is positioned generally centrally of the notched surface.
Claim 8
Dependent Claim
11 words
The screw of claim 1, wherein said head is spherical shaped.
Claim 9
Dependent Claim
136 words
In combination: a screw for a lumbar-sacral fixator, said screw comprising a threaded portion and a head, said screw having an elongated axis, said head having a first notched surface inclined at an angle of from about 30° to 45° with respect to the elongated axis and facing away from the threaded portion, said head defining a first tapped hole through the notched surface and a second tapped hole communicating with the first hole; a lumbar-sacral fixator comprising a stem having opposed ends, the ends each having a second notched surface for engaging said first notched surface of said head, and an opening extending through each end; and bolt means for extending through the opening in one of the ends of said stem and into the first tapped hole to secure said stem to said screw.
Claim 10
Dependent Claim
136 words
In combination: a screw for a lumbar-sacral fixator, said screw comprising a threaded portion and a head, said screw having an elongated axis, said head having a first notched surface inclined at an angle of from about 30° to 45° with respect to the elongated axis and facing away from the threaded portion, said head defining a first tapped hole through the notched surface and a second tapped hole communicating with the first hole; a lumbar-sacral fixator comprising a stem having opposed ends, the ends each having a second notched surface for engaging said first notched surface of said head, and an opening extending through each end; and bolt means for extending through the opening in one of the ends of said stem and into the first tapped hole to secure said stem to said screw.
Claim 11
Dependent Claim
14 words
The combination of claim 8, wherein said head of said screw is spherical shaped.
Claim 12
Dependent Claim
19 words
The combination of claim 8, wherein the second hole extends generally parallel to the elongated axis of the screw.
Claim 13
Dependent Claim
23 words
The combination of claim 8, further comprising screw means mounted within the second hole for locking the bolt means within the first hole.
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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) | 1999-04-09 | 1999-10-09 | 2000-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-09 | 2003-10-09 | 2004-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-09 | 2007-10-09 | 2008-04-09 | $7700.00 | Window Closed / Lapsed |