US Patent No: 6,645,209
Number of patents in Portfolio can not be more than 2000
Device for rotational stabilization of bone segments
Stats
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Nov 11, 2003
Issued date -
Oct 1, 2001
filing date -
09/968,562
serial no -
In Force
status
Importance
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Abstract
A device for rotational stabilization of bone segments comprising a bone plate, a bone lag screw, and a locking collar. The bone lag screw has a bone-engagement end, a distal end, and a keyed cross-sectional profile, the bone-engagement end configured for engaging a first bone segment. The bone plate has a flat portion for engaging a second bone segment and a barrel portion having an internal bore for slidably receiving the lag screw. The locking collar has a keyed internal profile that mates with the keyed cross-sectional profile of the lag screw to rotationally couple the locking collar and the lag screw when the lag screw is inserted through the locking collar, and an outer surface configured and dimensioned for (1) free rotation, in a first position, within the internal bore of the bone plate barrel portion and (2) frictionally engaging, in a second position, the internal bore of the bone plate barrel portion to resist or prevent rotation of the collar relative to the bone plate, and thereby resist or prevent rotation of the lag screw relative to the bone plate. The frictional engagement is achieved by a deformation of the distal end of the locking collar within the internal bore of the bone plate. This deformation is achieved by the application of force to the collar in the proximal direction.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,530,355 Compression screw assembly | 34 | 1982 | |
| 4,612,920 Compression hip screw | 55 | 1984 | |
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| 5,749,872 Keyed/keyless barrel for bone plates | 101 | 1995 | |
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| 5,843,082 Cervical spine stabilization method and system | 103 | 1996 | |
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| 5,007,910 Device for compression screwing | 32 | 1989 | |
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| 5,454,813 Intramedullary intertrochanteric fracture fixation appliance | 65 | 1993 | |
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| 5,514,138 Connector having a stop member | 44 | 1994 | |
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| 5,032,125 Intramedullary hip screw | 86 | 1990 | |
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| 5,735,853 Bone screw for osteosynthesis | 199 | 1996 | |
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| 5,501,684 Osteosynthetic fixation device | 234 | 1994 | |
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| 4,432,358 Compression hip screw apparatus | 71 | 1982 | |
| 4,657,001 Antirotational hip screw | 64 | 1984 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 11, 2015 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |