Source: http://www.google.com/patents/US20020082602?dq=5166694
Timestamp: 2015-07-04 07:20:52
Document Index: 322828502

Matched Legal Cases: ['art 5', 'art 5', 'art 5', 'art 15', 'art 15', 'art 5', 'art 15', 'art 5', 'art 5', 'art 5', 'art 15']

Patent US20020082602 - Fixing element - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA bone screw, known per se, with a thread section (2) and a receiving part (5) for receiving a rod (29) to be connected to the bone screw is created. The connection and locking of the connection between bone screw and rod takes place via an outer nut (13). So that the connection has the necessary strength...http://www.google.com/patents/US20020082602?utm_source=gb-gplus-sharePatent US20020082602 - Fixing elementAdvanced Patent SearchPublication numberUS20020082602 A1Publication typeApplicationApplication numberUS 10/034,290Publication dateJun 27, 2002Filing dateDec 21, 2001Priority dateDec 22, 2000Also published asCA2364657A1, CA2364657C, CN1359660A, DE10064571A1, DE10064571C2, EP1219256A2, EP1219256A3, EP1219256B1, US6695843Publication number034290, 10034290, US 2002/0082602 A1, US 2002/082602 A1, US 20020082602 A1, US 20020082602A1, US 2002082602 A1, US 2002082602A1, US-A1-20020082602, US-A1-2002082602, US2002/0082602A1, US2002/082602A1, US20020082602 A1, US20020082602A1, US2002082602 A1, US2002082602A1InventorsLutz Biedermann, Jurgen HarmsOriginal AssigneeLutz Biedermann, Jurgen HarmsExport CitationBiBTeX, EndNote, RefManReferenced by (26), Classifications (10), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetFixing element
[0013] The bone screw shown as an embodiment example comprises the actual screw element 1 with a thread section 2 and a head 3. Adjacent to the thread section the head is constructed in the shape of a segment of a ball. Coaxially to the thread axis and on the end opposite the thread section 2 the head has a recess 4 for bringing into engagement with an Inbus spanner. [0014] The bone screw further comprises a cylindrically constructed receiving part 5. This has at one end an axially symmetrically aligned first bore 7, the diameter of which is larger than that of the thread section 2 and smaller than that of the head 3. The receiving part 5 further has a coaxial second bore 8, which is open at the end opposite the first bore 7 and the diameter of which is large enough for the screw element 1 to be guided through the open end with its thread section 2 through the first bore 7 and with the head 3 to the floor of the second bore. Between the first and the second bore a small coaxial section 9 is provided, which borders directly on the first bore and is constructed as spherical towards the open area, wherein the radius is substantially identical to the radius of the section of the head 3 shaped like the segment of a ball. The receiving part 5 further has a U-shaped recess 6, arranged symmetrically to the centre of the part, the floor of which is directed towards the first bore 7 and the two side legs 30, 31 of which extend towards the open end facing away from the first bore 7. An outer thread 11 is provided at the open end of the legs of the U-shaped recess. [0015] On the side located at the open end of the head 3 is a pressure disc 11, which is constructed in such a way that on its side facing the head 3 it has a spherical depression, the radius of which is substantially identical to the radius of the section of the head shaped like the segment of a ball. The outer diameter of the pressure disc 11 is chosen in such a way that it can perform a sliding movement into the cylindrical section 12 of the second bore 8, in other words can be displaced in the cylindrical section towards the head. The pressure disc has a coaxial bore which enables access to the recess 4. [0016] The bone screw further comprises an outer nut 13, which is explained further in detail in particular by means of FIGS. 3 to 5. The outer nut is constructed as a capped nut and has a cylindrical side edge with an inner thread section 14, which forms the actual nut, and a cover part 15, adjacent to one edge of the thread section 14. The cover part is constructed as in a normal capped nut, but has additionally a concentric bore 16 with a first diameter. A sleeve 17 is further provided, which has a casing 18 and on its side facing the cover part 15 a floor 19. Provided in the floor 19 is a concentric bore 20 with a second diameter. The second diameter is identical to the first diameter of the bore 16 or a little larger. [0017] As can best be seen from FIG. 3 the casing 18 has an inner space adjacent to the floor 19, which comprises a cylindrical wall section 22, which ends at a predetermined distance from the floor. In the embodiment example shown an undercut is located between the cylindrical wall section 22 and the floor, the diameter of which is at least equal to the diameter of the cylindrical wall section 22. Basically the cylindrical wall section can also extend to the floor 19 itself. As can be seen from FIG. 3, on the inside of the casing a wall section 23, running convergently outwards, adjoins the edge of the cylindrical wall section 22 facing away from the floor 19 and is slanted outwards in such a way that it has the shape of a section of a cone, wherein the angle of inclination of the slant with respect to the cylindrical inner wall is approximately 30 to 60 and preferably approximately 40 . The outer diameter of the outside cylindrical sleeve 17 is almost identical to the diameter of the second bore 8 and smaller than the latter by a sufficient amount for it just to be able to be inserted into the second bore 8 without friction. [0018] As can further best be seen from FIG. 3, adjoining the truncated cone-shaped wall section 23, which becomes larger towards the outside, is a further wall section 24, which still increases outwards in diameter, in other words is again constructed as a conical section, but its inclination is only a few degrees. Alternatively this wall section 24 can also be constructed as cylindrical. [0019] The outer nut further comprises a pressure element 25. This has a central first cylindrical section 26, the outer diameter of which is substantially identical to the inner diameter of the cylindrical wall section 22. It is dimensioned in such a way that the pressure element is held in the cylindrical wall section 22 by frictional force by inserting this section into the inside of the casing. On the side facing the floor 19 of the sleeve 17 a second cylindrical section 27 is provided, coaxially to the first cylindrical section. The diameter of this projection substantially corresponds to the diameter of the bore 16 and is dimensioned in such a way that this cylindrical section in the bore 16 is held in it by the frictional force. On the side of the first cylindrical section 26 facing away from the floor 19 a section 28, extending convexly, is provided which is constructed approximately in the shape of a conical section and faces the section 26 with its small diameter. The small diameter of this almost truncated cone-shaped section 28 is almost identical to the small inner diameter of the wall section 23, and the large diameter of the conical section 28 is almost identical to the large inner diameter of the wall section 23. The angle of section 28 is substantially equal to the angle of the wall section 23. A third cylindrical section 29 (sic)* adjoins section 28. [0020] As can best be seen from FIG. 4, the pressure element 25 is pushed into the inside of the sleeve 17 until the convergent section 28 is resting on the inside of the sleeve. The dimensions of the pressure element in the axial direction are therein determined as follows: the axial length of the first cylindrical section 26 including a slanting edge, indicated in FIG. 4, is determined in such a way that when section 28 is adjacent to the inside of the sleeve between the floor 19 and the surface of the first cylindrical section 26 facing it there remains a slot-shaped distance 32 of preferably less than a millimeter. The length of the second cylindrical section 27 is identical to the length of the recess composed of bore 16 and bore 20. The axial length of the third section 29 (sic) is dimensioned in such a way that it projects, in the manner shown in FIG. 4 in the here described starting position, above the lower edge 33 of the sleeve 17 by a measurement which is greater than or at least equal to the measurement of the slot-shaped distance 32. [0021] In operation first the screw element 1, the receiving part 5 and the pressure disc are assembled in the way known per se, as can best be seen from FIG. 2. Then a rod 34 to be connected to the bone screw is inserted. The outer nut 13 is pre-mounted in the state which can be seen in FIG. 4, in other words the pressure element 25 is inserted into the sleeve 17 and together with this connected to the cover part 15. The thus pre-mounted nut is now screwed on to the outer thread of the receiving part 5. The rod 34 is therein located on the one hand on top of the pressure disc 11. On the other hand it is impacted with the pressure by the pressure element 22, which comes into contact with the rod during screwing on, so the outer nut 13 has almost reached the final position. When the outer nut 13 is further tightened into the desired final position the pressure element 25 is pushed to the floor, in the way shown in FIG. 5, which has the simultaneous result that the section 28 acts on the inner wall of the sleeve 17 in such a way that this is pressed slightly outwards, in the way shown in FIG. 5. This achieves that the casing 18 with its outer face in turn applies a force on to the exposed legs 30, 31 in the area of the outer thread 10 of the casing 18 comprising the inner thread. [0022] As FIG. 3 shows best, the casing 18 has a multiplicity of slits 35, extending over the entire length of the casing, which are spaced apart in the circumferential direction and which make easier the above described process of widening the casing 18 when the pressure element 25 is pressed in. [0023] By provision of the wall section 24 adjacent to the convex wall section 23, spreading out in the wall section 24 is achieved, which results in the outer diameter, without counter pressure from outside on to the sleeve in the area of the lower edge 33, being larger than the outer diameter of the sleeve in the area of the convex wall section 23. This enables a greater tolerance for the relative dimensioning of the outer diameter of the sleeve 17 relative to the inner diameter of the second bore 8, as even if the inner diameter of the second bore 8 is slightly larger than the outer diameter of the sleeve 17 a pressure is still exerted on the legs 30, 31, which is sufficient for locking. By means of this lengthening of the sleeve and dividing it up by the slits 35 into individual wall sections, these act as a kind of flectional beam, so locking also takes place more elastically. [0024] In the above-described embodiment example this is a so-called polyaxial screw, in which the screw element 1 and the receiving part 5 can be moved at an angle relative to one another. In a modified embodiment the screw element 1 and a receiving part receiving the rod 34 are constructed in one piece with one another, possibly such that, in the way shown in FIG. 2, the receiving part 5, the head 3 and the pressure disc 11 are constructed as one piece. The outer nut 13 has in this case the identical above-described shape. In operational mode stopping of the outer nut 13 takes place by action of the force from the rod 34 on to the pressure element 25 in the above-described way, so the same locking is achieved. [0025] The embodiment shown in FIG. 6 is different from the embodiments described using FIGS. 1 to 5 only in that instead of the screw element 1 with the thread section 2 a shank 36 with a hook 37 is provided. All other elements coincide fully with the previously described elements. The hook is of a kind which is hooked in particular on the rear bone projections of the spinal column, e.g. on the lamina arches, in transverse extensions or in inter-vertebral spaces. The shape and dimensions are known from the general prior art. [0026] In the above-described embodiment examples the sleeve 17 has a floor 19. In a modified embodiment the sleeve 17 has no floor. The sleeve is then directly adjacent to the inner side 36 of the cover part 15 and the gap 32 is correspondingly formed between the surface of the first cylindrical section 26 facing the inner side and the inner side 36. The length of the second cylindrical section 27 is then identical to the length of the bore 16. Referenced byCiting PatentFiling datePublication dateApplicantTitleUS6835196 *Jan 7, 2002Dec 28, 2004Biedermann Motech GmbhAnchoring elementUS7377923May 19, 2004May 27, 2008Alphatec Spine, Inc.Variable angle spinal screw assemblyUS7766946Jul 18, 2006Aug 3, 2010Frank Emile BaillyDevice for securing spinal rodsUS7794481 *Apr 22, 2005Sep 14, 2010Warsaw Orthopedic, Inc.Force limiting coupling assemblies for spinal implantsUS7828829Mar 22, 2007Nov 9, 2010Pioneer Surgical Technology Inc.Low top bone fixation system and method for using the sameUS7901436 *Sep 3, 2004Mar 8, 2011Zimmer Spine S.A.S.Spinal implantUS7922725Apr 19, 2007Apr 12, 2011Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization systemUS7922749Apr 14, 2006Apr 12, 2011Warsaw Orthopedic, Inc.Reducing deviceUS7955359Jul 10, 2006Jun 7, 2011Biedermann Motech GmbhBone anchoring deviceUS8062340Aug 16, 2007Nov 22, 2011Pioneer Surgical Technology, Inc.Spinal rod anchor device and methodUS8353932 *Aug 20, 2008Jan 15, 2013Jackson Roger PPolyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate memberUS8398683Oct 23, 2008Mar 19, 2013Pioneer Surgical Technology, Inc.Rod coupling assembly and methods for bone fixationUS8409256Dec 28, 2006Apr 2, 2013Depuy Spine, Inc.Spinal anchoring screwUS8506601Oct 14, 2009Aug 13, 2013Pioneer Surgical Technology, Inc.Low profile dual locking fixation system and offset anchor memberUS8623061Nov 23, 2010Jan 7, 2014Rolix Holdings, LlcCAM lock pedicle screwUS8632572Mar 15, 2011Jan 21, 2014Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization systemUS8636778Feb 11, 2010Jan 28, 2014Pioneer Surgical Technology, Inc.Wide angulation coupling members for bone fixation systemUS8870927May 3, 2011Oct 28, 2014Biedermann Technologies Gmbh & Co. KgBone anchoring deviceUS8882808Mar 4, 2011Nov 11, 2014Zimmer Spine S.A.S.Spinal implantUS8926671Feb 19, 2010Jan 6, 2015Biedermann Technologies Gmbh & Co. KgReceiving part for receiving a rod for coupling the rod to a bone anchoring element and a bone anchoring device with such a receiving partUS8940024May 8, 2012Jan 27, 2015Biedermann Technologies Gmbh & Co. KgBone anchoring deviceEP1743584A1 *Jul 12, 2005Jan 17, 2007BIEDERMANN MOTECH GmbHBone anchoring deviceEP1769761A1 *Jul 12, 2005Apr 4, 2007BIEDERMANN MOTECH GmbHBone anchoring deviceWO2004103194A1 *May 21, 2004Dec 2, 2004Alphatec Mfg IncVariable angle spinal screw assemblyWO2009035725A1 *Apr 29, 2008Mar 19, 2009Custom Spine IncDynamic screw systemWO2011063410A1Nov 23, 2010May 26, 2011Felix QuevedoCam lock pedicle screw* Cited by examinerClassifications U.S. Classification606/271International ClassificationA61B17/58, F16B2/06, F16B25/00, A61B17/70, F16B7/04Cooperative ClassificationA61B17/7037, A61B17/7032European ClassificationA61B17/70B2, A61B17/70B5BLegal EventsDateCodeEventDescriptionDec 22, 2003ASAssignmentOwner name: BIEDERMANN MOTECH GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BIEDERMANN, LUTZ;HARMS, JURGEN;REEL/FRAME:014813/0297;SIGNING DATES FROM 20031127 TO 20031202Owner name: BIEDERMANN MOTECH GMBH BERTHA-VON-SUTTNER-STRASSEOwner name: BIEDERMANN MOTECH GMBH BERTHA-VON-SUTTNER-STRASSEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BIEDERMANN, LUTZ;HARMS, JURGEN;REEL/FRAME:014813/0297;SIGNING DATES FROM 20031127 TO 20031202Aug 14, 2007FPAYFee paymentYear of fee payment: 4Aug 18, 2011FPAYFee paymentYear of fee payment: 8Jan 26, 2012ASAssignmentOwner name: BIEDERMANN MOTECH GMBH & CO. KG, GERMANYFree format text: CHANGE OF LEGAL FORM;ASSIGNOR:BIEDERMANN MOTECH GMBH;REEL/FRAME:027603/0504Effective date: 20090720Mar 16, 2012ASAssignmentOwner name: BIEDERMANN TECHNOLOGIES GMBH & CO. KG, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BIEDERMANN MOTECH GMBH & CO. KG;REEL/FRAME:027873/0551Effective date: 20120308RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services