US Patent No: 6,645,209

Number of patents in Portfolio can not be more than 2000

Device for rotational stabilization of bone segments

ALSO PUBLISHED AS: 20020049445

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
SYNTHES AG CHURWEST CHESTER, PA40
SYNTHES USA, LLCWEST CHESTER, PA482

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hall, IV Harry Thomas Downingtown, PA 2 66
Kaufmann, Josef Peter Monument, CO 2 29
Tessier, Jeffrey M Monument, CO 3 25

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ZIMMER TECHNOLOGY, INC. (2)
4,530,355 Compression screw assembly 41 1982
4,612,920 Compression hip screw 60 1984
 
DEPUY ACE MEDICAL COMPANY (1)
5,749,872 Keyed/keyless barrel for bone plates 118 1995
 
DEPUY ACROMED, INC. (1)
5,843,082 Cervical spine stabilization method and system 115 1996
 
DR. HERMANN JEHLE (1)
5,007,910 Device for compression screwing 37 1989
 
HOWMEDICA INTERNATIONAL S. DE R.L. (1)
5,454,813 Intramedullary intertrochanteric fracture fixation appliance 71 1993
 
PFIZER INC. (1)
5,514,138 Connector having a stop member 52 1994
 
SMITH & NEPHEW RICHARDS INC. (1)
5,032,125 Intramedullary hip screw 99 1990
 
SPHEROFIX AB (1)
5,735,853 Bone screw for osteosynthesis 231 1996
 
SYNTHES USA, LLC (1)
5,501,684 Osteosynthetic fixation device 282 1994
 
Other [Check patent profile for assignment information] (2)
4,432,358 Compression hip screw apparatus 78 1982
4,657,001 Antirotational hip screw 71 1984

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SMITH & NEPHEW, INC. (12)
7,534,244 Orthopaedic plate and screw assembly 11 2004
7,527,627 Orthopaedic implant and screw assembly 23 2004
7,799,030 Orthopaedic plate and screw assembly 1 2007
7,780,667 Orthopaedic plate and screw assembly 9 2007
7,931,652 Orthopaedic plate and screw assembly 1 2007
7,883,509 Orthopaedic implant and screw assembly 1 2007
8,187,275 Orthopaedic implant and fastening assembly 0 2007
7,918,853 Orthopaedic plate and screw assembly 8 2008
8,105,326 Orthopaedic implant and fastener assembly 2 2009
8,449,544 Orthopaedic implant and fastener assembly 0 2009
8,298,234 Orthopaedic implant and fastener assembly 3 2010
8,617,161 Orthopaedic plate and fastener assembly 0 2010
 
SPINAL ELEMENTS, INC. (5)
8,496,691 Side-biased orthopedic fastener retention 0 2006
8,496,708 Flanged interbody fusion device with hinge 0 2006
8,470,039 Flanged interbody fusion device with fastener insert and retaining ring 0 2006
8,100,955 Orthopedic expansion fastener 21 2006
8,696,721 Orthopedic expansion fastener 0 2011
 
STRYKER TRAUMA GMBH (3)
7,569,055 Osteosynthetic aid 3 2003
8,734,494 Hip fracture device with static locking mechanism allowing compression 0 2008
8,398,636 Hip fracture device with barrel and end cap for load control 0 2008
 
BIOMET C.V. (1)
7,670,341 Orthopaedic device with locking barrel 4 2005
 
ROCKY RESEARCH (1)
5,384,101 Method and apparatus for achieving high reaction rates in solid-gas reactor systems 23 1992
 
SYNTHES USA, LLC (1)
7,837,709 Bone fixation means 0 2004
 
Other [Check patent profile for assignment information] (2)
7,503,919 Locking compression hip screw 12 2006
8,470,005 Hip nail support assembly 0 2012

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

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