FR2467312A1 - Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling - Google Patents

Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling Download PDF

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Publication number
FR2467312A1
FR2467312A1 FR7924964A FR7924964A FR2467312A1 FR 2467312 A1 FR2467312 A1 FR 2467312A1 FR 7924964 A FR7924964 A FR 7924964A FR 7924964 A FR7924964 A FR 7924964A FR 2467312 A1 FR2467312 A1 FR 2467312A1
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FR
France
Prior art keywords
screw
parts
part
nut
characterized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7924964A
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French (fr)
Other versions
FR2467312B1 (en
Inventor
Jean-Paul Lambert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOULAY STE INDLE
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BOULAY STE INDLE
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Filing date
Publication date
Application filed by BOULAY STE INDLE filed Critical BOULAY STE INDLE
Priority to FR7924964A priority Critical patent/FR2467312B1/fr
Publication of FR2467312A1 publication Critical patent/FR2467312A1/en
Application granted granted Critical
Publication of FR2467312B1 publication Critical patent/FR2467312B1/fr
Application status is Expired legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/12Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B31/00Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/021Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part

Abstract

The locking screw comprises an upper screwed part (a) which is counterbored to accommodate a standard hexagonal key and a lower screwed part (b) which is counterbored for a hexagonal key of smaller size than that in the upper part. The two halves are connected by a section (c) of reduced diameter. The screw is tightened using the larger, upper, hexagonal drive key. At the extremity of its travel a continuation of the turning effort will produce a shearing torque (in the plane "S"), the magnitude of which is determined by the thickness of the section (c). After shearing the whole of the turning action acts on the upper part only and deformation (7) takes place locking the two elements.

Description

La présente invention concerne une vis, ou écrou, tarée, c'est-b- dire présentant une rupture pour un couple de serrage détermine. The present invention relates to a screw or nut, calibrated, that is to say b having a snap to a determined tightening torque.

On connait déjà des vis, ou écrous, tarés, mais dans ees disposi- tifs connus, la rupture qui se produit, à un couple donné, entre les deux parties de la vis ou de l'écrou, n'est pas utilisée pour obtenir un effet de blocage d'une partie de la vis, ou de l'écrou, par l'autre partie. already known screws or nuts, nerds, but in ed provi- known tive, the break that occurs at a given torque between the two parts of the screw or nut, is not used for a blocking effect of a portion of the screw or the nut, by the other party. Généralement, après rupture, l'une des parties estjetée et ne peut plus hêtre utilisée et encore moins contribuer à l'effet de blocage ou d'indesserrabilitd de la partie de la vis, ou de l'écrou, assurant le serrage. Generally, after rupture, to one of parts estjetée and can no longer beech used much less contribute to the blocking effect or indesserrabilitd of the part of the screw or the nut, ensuring the clamping.

Par rapport à ces systèmes connus, l'invention permet, nonseulement un serrage à un couple déterminé, mais assure également, sans outillage spécial ni pièces supplémentaires, le blocage de la partie de la vis, ou de l'écrou, assurant le serrage, tout en permettant le démontage Even- tuel du système. Compared to these known systems, the invention allows, nonseulement tightening to a particular couple, but also ensures, without special tools or additional parts, blocking part of the screw or nut, ensuring tightening, while allowing the Even-tual dismantling of the system.

Suivant une caractéristique de ltinorention, la zone d'affaiblisse- ment pratiquée dans le corps de l'écrou ou dç la tige dela vis, p our une rupture sous un couple determine de serrage, est conformée de façon qu'en continuant à exercerun couple sur la partie de l'écrou, ou vis, anté-- rieure à cette zone, après rupture des deux parties de- la vis, ou ecrou, il se produire un autoblocage de l'une sur l'autre de ces parties. According to one characteristic of ltinorention, the weakening zone ment made in the body of the nut or DC dela screw rod f or rupture under a predetermined torque tightening, is shaped so that by continuing to couple exercerun on the portion of the nut or screw, anté-- higher in this area, after rupture of the two parts de- screw or nut, there occur a self-locking one to the other of these parts.

Suivantune autre caractdristique de l'invention, la partie de la vis ou de l'écrou dont le blocage est assure après rupture des deux partiesde la vis peut être desserrée gracie à un système de manoeuvre indépendant que comporte ladite partie. Suivantune other caractdristique of the invention, the part of the screw or nut whose locking is assured after disruption of two partiesde the screw can be loosened gracie an independent operating system that includes said part.

Les divers caractéristiqueset avantages de l'invention ressortiront de la description quiva suivre, d'une de ses formes possibles de realisation. The various caractéristiqueset advantages of the invention emerge from the description Quiva follow one of its possible forms of realization. ll est bien précisé qu'il s'agituniquement d'un exemple et que toutes autres formes, proportions et dispositions pourraient êtreadoptees sans sortir du cadre de l'invention. It is made clear that it agituniquement an example and that other forms, proportions and arrangements could êtreadoptees within the scope of the invention.

Au cours de cette description, on se réfère au dessin ci-joint qui montre In this description, refers to the attached drawing, which shows
fig. Fig. 1 une vue en coupe diamétrale d'une vis perfectionnée suivant l'invention, avant que le couple de serrage ne soit atteint; 1 a diametrical sectional view of an improved screw according to the invention before the tightening torque is reached;
fig. Fig. 2 une vue, analogue à la figure 1, après que le couple de blocage ait été atteint. 2 a view, similar to Figure 1, after the stall torque has been reached.

L'exemple traité - rassporte à une vis destinée au serrage des conducteurs sur des bornes de-jonction ou de dérivation. Example Treaty - rassporte to a screw for the clamping of conductors on terminals-junction or junction.

La vis est constituée par: The screw is constituted by:
- une partie supérieure a comportant un filetage I et un six-pans interne 2 pour le serrage au moyen d'une cl ad-hoc; - an upper part having a thread I and an internal hexagon 2 for clamping by means of a cl ad-hoc;
- une partie inférieure b comportant un filetage 3 identique au filetage i et, conformément Bl'invention, un six-pans interne 4 plus petit que le six-pans 2 de la partie a - a lower portion b having a thread identical to the thread 3 and i in accordance Bl'invention, 4 smaller internal hexagon that the hexagon 2 of part a
- une partie médiane c reliant les deux parties a et b et présentant une section radiale déterminée constituant une zone d'affaiblissement. - a middle portion c connecting the two parts a and b and having a specific radial section constituting a weakened area.


ConformémentX l'invention, le raccordement entre les deux parties de la ConformémentX the invention, the connection between the two parts of the
5 vis est conformé - par exemple par chanfreinage/- de façon, comme il sera expliqué dans un instant, à propos du fonctionnement du dispositif, à assurer son autoblocage une fois le serrage réalisé. Screw 5 is shaped - for example by chamfering / - so, as will be explained in a moment about the operation of the device to ensure its self-locking when the joints are tight.

Le fonctionnement est le suivant The operation is as follows
Le serrage de la vis s'opère en agissant à l'aide d'une cle hexagonale introduite dans le six-pans interne 2 et butant sur l'épaulement 2a du sixpans. The tightening of the screw is effected by acting by means of a hexagonal key inserted into the internal hex cap 2 and abutting against the shoulder 2a of hex cap. Lors du serrage du ou -des conducteurs, ceux-ci étant en contact direct ou indirectavec la surface 6 de la partie b de la vis, il se créé, entre la partie a actionnée par l'opérateur et la partie b soumise àl'effort de contact, un couple. When tightening the -des or conductors thereof being in direct contact or indirect-surface 6 of the part b of the screw, there is created between the part has actuated by the operator and part b submitted àl'effort contact, a couple. Ce couple, en rapport direct avec le serrage du ou des conducteurs, agira principalement sur la partie c. This torque, in direct connection with the clamping of the conductor, will act mainly on the part c. C'est donc cette partie qui, en se sectionnant, déterminera le couple de serrage optimum du ou des conducteurs. It is therefore this part which, by sectioning, determine the optimum torque of the conductor.

Après rupture suivant la zone 8 le couple, que l'on continue d'exer-- cer sur la partie a n'agit plus sur la partie b. After rupture zone 8 according to the torque, which is of continuous exer-- cer on the party no longer acts on the part b.

Cette action supplémentaireassure le contre-blocage de la pa-rtie b et déforme simultanément la partie c, créant sous la partie a un bourrelet 7 s'opposant àl'introduction d'une clS hexagonaIe de la dimension- dusix-pans interne 4. Ce bourrelet empêche donc une action intempestive sur la -partie bet indique'le bon serrage du dispositif. This action supplémentaireassure the against-lock procedure b and simultaneously deforms the part c, creating the sub portion has a bead 7 opposing THE INTRODUCTION a CLS hexagonaIe internal dusix-dimensional sections 4. This bead thus prevents inadvertent action on the -part bet indique'le tightness of the device.

Le démontage d; The dismantling; dispositif est possible, les parties a et c dotant restées solidaires. device is possible, the parts a and c providing remained integral. On dévisse la partie a et l'on agit ensuite sur le six- pans 4 pour enlever la partie b. Unscrewing the party and then acts on the six- sided 4 to remove part b.

Claims (4)

REVENDICATIONS
1) Système de serrage, tel que vis ou écrou, taré, c'est-à-dire presentant une zone d'affaiblissement en vue de la rupture du système pour un couple de serrage déterminé, caractérisé en ce que la zone d'affaiblissement pratiquée dans le corps de l'écrou ou la tige de la vis, pour une rupture sous un couple déterminé de serrage, est conformée de façon qu'en continuant à exercer un couple sur la partie de ltécrou, ou vis, antérieure à cette zone, après rupture des deux parties de la vis ou écrou, il se produise un autoblocage l'une sur l'autre de ces parties. 1) clamping system, such as a screw or nut, calibrated, that is to say having a weakened region for breaking of the system for a specific tightening torque, characterized in that the weakening zone made in the body of the nut or the screw shank, for a rupture under a determined tightening torque, is shaped so that by continuing to exert a torque on the part of ltécrou, or screws, prior to this zone after breaking of the two parts of the screw or nut, it occurs a self-locking one to the other of these parts.
2) Système de serrage taré suivant la revendication 1, caractérisé en ce que la zone d'affaiblissement est chanfreinée de façon à déterminer après rupture des deux parties la formation d'un bourrelet de métal entre les deux parties assurant un blocage réciproque de ces parties. 2) calibrated clamping system according to claim 1, characterized in that the weakening zone is chamfered so as to determine after rupture of the two parts forming a metal bead between the two parts providing a reciprocal clamping these parts .
3) Système suivant la revendication 2, caractérisé en ce que le bourrelet formé après rupture fait saillie sur la partie inférieure de la vis de façon à empêcher toute action intempestive sur ladite partie et à permettre de vérifier le serrage. 3) System according to claim 2, characterized in that the bead formed after fracture projecting from the lower part of the screw so as to prevent any untimely action on said portion and to permit proper tightness.
4) Système suivant l'une quelconque des revendications précédentes, caractérisé en ce que chaque partie su système comporte un dispositif de manoeuvre indépendant permettant un démontage ultérieur du systè me tout entier. 4) A system according to any preceding claim, characterized in that each managed system part comprises an independent actuating device for a subsequent disassembly of the entire system me.
FR7924964A 1979-10-08 1979-10-08 Expired FR2467312B1 (en)

Priority Applications (1)

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FR2467312A1 true FR2467312A1 (en) 1981-04-17
FR2467312B1 FR2467312B1 (en) 1984-08-10

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536112A (en) * 1981-09-23 1985-08-20 Oerlikon-Boehringer Gmbh Protection device against overloads in a machine
EP0634811A1 (en) * 1993-07-13 1995-01-18 ARCUS ELEKTROTECHNIK ALOIS SCHIFFMANN GmbH Shear bolt screw
WO1997014366A1 (en) * 1995-10-18 1997-04-24 Cross Medical Products, Inc. Self-limiting set screw for use with spinal implant systems
US6004349A (en) * 1997-01-06 1999-12-21 Jackson; Roger P. Set screw for use with osteosynthesis apparatus
US6056753A (en) * 1998-07-13 2000-05-02 Jackson; Roger P. Set screw for use with osteosynthesis apparatus
US6059786A (en) * 1998-10-22 2000-05-09 Jackson; Roger P. Set screw for medical implants
US6224596B1 (en) 1997-01-06 2001-05-01 Roger P. Jackson Set screw for use with osteosynthesis apparatus
US6257625B1 (en) * 1999-04-23 2001-07-10 Taisei Kiko Co., Ltd. Flexible joint and long nut for flexible joint
US6443681B1 (en) * 1993-09-30 2002-09-03 Ideal-Standard Gmbh Threaded component with a tool-fitting region
US6454768B1 (en) 2000-12-05 2002-09-24 Roger P. Jackson Removable gripping set screw
US6454772B1 (en) 2000-12-08 2002-09-24 Roger P. Jackson Set screw for medical implant with gripping side slots
US6726687B2 (en) 2000-12-08 2004-04-27 Jackson Roger P Closure plug for open-headed medical implant
US6997927B2 (en) 2000-12-08 2006-02-14 Jackson Roger P closure for rod receiving orthopedic implant having a pair of spaced apertures for removal
US9636146B2 (en) 2012-01-10 2017-05-02 Roger P. Jackson Multi-start closures for open implants
US9662143B2 (en) 2004-02-27 2017-05-30 Roger P Jackson Dynamic fixation assemblies with inner core and outer coil-like member
USRE46431E1 (en) 2003-06-18 2017-06-13 Roger P Jackson Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
US9717534B2 (en) 2009-06-15 2017-08-01 Roger P. Jackson Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure
US9743957B2 (en) 2004-11-10 2017-08-29 Roger P. Jackson Polyaxial bone screw with shank articulation pressure insert and method
US9770265B2 (en) 2012-11-21 2017-09-26 Roger P. Jackson Splay control closure for open bone anchor
US10058354B2 (en) 2013-01-28 2018-08-28 Roger P. Jackson Pivotal bone anchor assembly with frictional shank head seating surfaces
US10064658B2 (en) 2014-06-04 2018-09-04 Roger P. Jackson Polyaxial bone anchor with insert guides
US10349983B2 (en) 2003-05-22 2019-07-16 Alphatec Spine, Inc. Pivotal bone anchor assembly with biased bushing for pre-lock friction fit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8377100B2 (en) 2000-12-08 2013-02-19 Roger P. Jackson Closure for open-headed medical implant
US8876868B2 (en) 2002-09-06 2014-11-04 Roger P. Jackson Helical guide and advancement flange with radially loaded lip
US6726689B2 (en) 2002-09-06 2004-04-27 Roger P. Jackson Helical interlocking mating guide and advancement structure
US8257402B2 (en) 2002-09-06 2012-09-04 Jackson Roger P Closure for rod receiving orthopedic implant having left handed thread removal
US8282673B2 (en) 2002-09-06 2012-10-09 Jackson Roger P Anti-splay medical implant closure with multi-surface removal aperture
US8926672B2 (en) 2004-11-10 2015-01-06 Roger P. Jackson Splay control closure for open bone anchor
US8366753B2 (en) 2003-06-18 2013-02-05 Jackson Roger P Polyaxial bone screw assembly with fixed retaining structure
US8926670B2 (en) 2003-06-18 2015-01-06 Roger P. Jackson Polyaxial bone screw assembly
US8398682B2 (en) 2003-06-18 2013-03-19 Roger P. Jackson Polyaxial bone screw assembly
US8137386B2 (en) 2003-08-28 2012-03-20 Jackson Roger P Polyaxial bone screw apparatus
WO2006052796A2 (en) 2004-11-10 2006-05-18 Jackson Roger P Helical guide and advancement flange with break-off extensions
US7833250B2 (en) 2004-11-10 2010-11-16 Jackson Roger P Polyaxial bone screw with helically wound capture connection
US10076361B2 (en) 2005-02-22 2018-09-18 Roger P. Jackson Polyaxial bone screw with spherical capture, compression and alignment and retention structures
US9168069B2 (en) 2009-06-15 2015-10-27 Roger P. Jackson Polyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US8852239B2 (en) 2013-02-15 2014-10-07 Roger P Jackson Sagittal angle screw with integral shank and receiver
US9566092B2 (en) 2013-10-29 2017-02-14 Roger P. Jackson Cervical bone anchor with collet retainer and outer locking sleeve
US9451993B2 (en) 2014-01-09 2016-09-27 Roger P. Jackson Bi-radial pop-on cervical bone anchor
US9597119B2 (en) 2014-06-04 2017-03-21 Roger P. Jackson Polyaxial bone anchor with polymer sleeve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2017648A1 (en) * 1968-09-09 1970-05-22 Vaughn Rudolph
GB1269611A (en) * 1970-01-05 1972-04-06 Paterex Ltd Lock nut device
FR2403484A1 (en) * 1977-09-20 1979-04-13 Ducourret Paul Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2017648A1 (en) * 1968-09-09 1970-05-22 Vaughn Rudolph
GB1269611A (en) * 1970-01-05 1972-04-06 Paterex Ltd Lock nut device
FR2403484A1 (en) * 1977-09-20 1979-04-13 Ducourret Paul Self-locking nut with connected end segment - using shear neck which breaks when predetermined torque is reached

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4536112A (en) * 1981-09-23 1985-08-20 Oerlikon-Boehringer Gmbh Protection device against overloads in a machine
EP0634811A1 (en) * 1993-07-13 1995-01-18 ARCUS ELEKTROTECHNIK ALOIS SCHIFFMANN GmbH Shear bolt screw
US6443681B1 (en) * 1993-09-30 2002-09-03 Ideal-Standard Gmbh Threaded component with a tool-fitting region
WO1997014366A1 (en) * 1995-10-18 1997-04-24 Cross Medical Products, Inc. Self-limiting set screw for use with spinal implant systems
US5697929A (en) * 1995-10-18 1997-12-16 Cross Medical Products, Inc. Self-limiting set screw for use with spinal implant systems
US6004349A (en) * 1997-01-06 1999-12-21 Jackson; Roger P. Set screw for use with osteosynthesis apparatus
US6224596B1 (en) 1997-01-06 2001-05-01 Roger P. Jackson Set screw for use with osteosynthesis apparatus
US6179841B1 (en) 1997-01-06 2001-01-30 Medtronic Sofamor Danek, Incorporated Set screw for use with osteosynthesis apparatus
US6056753A (en) * 1998-07-13 2000-05-02 Jackson; Roger P. Set screw for use with osteosynthesis apparatus
US6059786A (en) * 1998-10-22 2000-05-09 Jackson; Roger P. Set screw for medical implants
US6102913A (en) * 1998-10-22 2000-08-15 Jackson; Roger P. Removeable set screw for medical implant
US6257625B1 (en) * 1999-04-23 2001-07-10 Taisei Kiko Co., Ltd. Flexible joint and long nut for flexible joint
US6454768B1 (en) 2000-12-05 2002-09-24 Roger P. Jackson Removable gripping set screw
US7846187B2 (en) 2000-12-08 2010-12-07 Jackson Roger P Closure plug for open headed medical implant
US6726687B2 (en) 2000-12-08 2004-04-27 Jackson Roger P Closure plug for open-headed medical implant
US6997927B2 (en) 2000-12-08 2006-02-14 Jackson Roger P closure for rod receiving orthopedic implant having a pair of spaced apertures for removal
US6454772B1 (en) 2000-12-08 2002-09-24 Roger P. Jackson Set screw for medical implant with gripping side slots
US10349983B2 (en) 2003-05-22 2019-07-16 Alphatec Spine, Inc. Pivotal bone anchor assembly with biased bushing for pre-lock friction fit
USRE46431E1 (en) 2003-06-18 2017-06-13 Roger P Jackson Polyaxial bone anchor with helical capture connection, insert and dual locking assembly
US9662143B2 (en) 2004-02-27 2017-05-30 Roger P Jackson Dynamic fixation assemblies with inner core and outer coil-like member
US9743957B2 (en) 2004-11-10 2017-08-29 Roger P. Jackson Polyaxial bone screw with shank articulation pressure insert and method
US9717534B2 (en) 2009-06-15 2017-08-01 Roger P. Jackson Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US9636146B2 (en) 2012-01-10 2017-05-02 Roger P. Jackson Multi-start closures for open implants
US9770265B2 (en) 2012-11-21 2017-09-26 Roger P. Jackson Splay control closure for open bone anchor
US10058354B2 (en) 2013-01-28 2018-08-28 Roger P. Jackson Pivotal bone anchor assembly with frictional shank head seating surfaces
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure
US10064658B2 (en) 2014-06-04 2018-09-04 Roger P. Jackson Polyaxial bone anchor with insert guides

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