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 PDFInfo
- 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
- Authority
- FR
- France
- Prior art keywords
- screw
- parts
- nut
- rupture
- internal
- 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
Links
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000003313 weakening effect Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract 2
- 239000004020 conductor Substances 0.000 description 4
- 230000002730 additional effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
- F16B31/021—Screwed 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
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 tared screw, or nut, that is to say having a break for 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. 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. We already know screws, or nuts, tared, but in these known devices, the rupture which occurs, at a given torque, between the two parts of the screw or nut, is not used to obtain a blocking effect of part of the screw, or of the nut, by the other part. Generally, after rupture, one of the parts is discarded and can no longer be used and even less contribute to the blocking or indesserrabilitd effect of the part of the screw, or of the nut, ensuring the tightening.
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, not only tightening to a determined torque, but also ensures, without special tools or additional parts, the blocking of the part of the screw, or of the nut, ensuring the tightening, while allowing possible disassembly 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 the invention, the weakening zone practiced in the body of the nut or of the screw rod, for failure under a determined tightening torque, is shaped so that by continuing to exert a torque on the part of the nut, or screw, anterior to this zone, after rupture of the two parts of the screw, or nut, an autoblocking of one on the other of these parts occurs.
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. According to another characteristic of the invention, the part of the screw or nut whose blocking is ensured after rupture of the two parts of the screw can be loosened thanks to an independent operating system that comprises said part.
Les divers caractéristiqueset avantages de l'invention ressortiront de la description quiva suivre, d'une de ses formes possibles de realisation. 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. The various characteristics and advantages of the invention will emerge from the description which follows, of one of its possible forms of embodiment. It is clearly stated that this is only an example and that all other forms, proportions and arrangements could be adopted without departing from the scope of the invention.
Au cours de cette description, on se réfère au dessin ci-joint qui montre
fig. 1 une vue en coupe diamétrale d'une vis perfectionnée suivant l'invention, avant que le couple de serrage ne soit atteint;
fig. 2 une vue, analogue à la figure 1, après que le couple de blocage ait été atteint. During this description, reference is made to the attached drawing which shows
fig. 1 is a diametrical sectional view of an improved screw according to the invention, before the tightening torque is reached;
fig. 2 a view, similar to Figure 1, after the locking torque has been reached.
L'exemple traité - rassporte à une vis destinée au serrage des conducteurs sur des bornes de-jonction ou de dérivation. The example treated - brings together a screw intended for tightening the conductors on junction or branch terminals.
La vis est constituée par:
- une partie supérieure a comportant un filetage I et un six-pans interne 2 pour le serrage au moyen d'une 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
- une partie médiane c reliant les deux parties a et b et présentant une section radiale déterminée constituant une zone d'affaiblissement.The screw consists of:
- an upper part a comprising a thread I and an internal hexagon 2 for tightening by means of an ad-hoc key;
- A lower part b comprising a thread 3 identical to the thread i and, in accordance with Bl'invention, an internal hexagon 4 smaller than the hexagon 2 of part a
- A middle part c connecting the two parts a and b and having a determined radial section constituting a weakening zone.
ConformémentX l'invention, le raccordement entre les deux parties de la
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.
In accordance with the invention, the connection between the two parts of the
5 screw 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 once the tightening achieved.
Le fonctionnement est le suivant
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. 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. Ce couple, en rapport direct avec le serrage du ou des conducteurs, agira principalement sur la partie c. C'est donc cette partie qui, en se sectionnant, déterminera le couple de serrage optimum du ou des conducteurs.The operation is as follows
The tightening of the screw is effected by using a hexagonal key introduced into the internal hexagon 2 and abutting on the shoulder 2a of the hexagon. When tightening the conductor (s), these being in direct or indirect contact with the surface 6 of the part b of the screw, it is created, between the part a actuated by the operator and the part b subjected to the force contact, a couple. This torque, directly related to the tightening of the conductor (s), will act mainly on part c. It is therefore this part which, by cutting, will determine the optimum tightening torque of the conductor (s).
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 according to zone 8 the couple, which we continue to exert on part a no longer acts on 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 additional action ensures counter-blocking of part b and simultaneously deforms part c, creating under part a bead 7 opposing the introduction of a hexagon key of the internal hexagonal dimension 4. This bead therefore prevents untimely action on the -part bet indicates the correct tightening of the device.
Le démontage d; dispositif est possible, les parties a et c dotant restées solidaires. On dévisse la partie a et l'on agit ensuite sur le six- pans 4 pour enlever la partie b. The dismantling of; device is possible, the parts a and c endowed remained united. We unscrew part a and then act on hexagon 4 to remove part b.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7924964A FR2467312A1 (en) | 1979-10-08 | 1979-10-08 | Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7924964A FR2467312A1 (en) | 1979-10-08 | 1979-10-08 | Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2467312A1 true FR2467312A1 (en) | 1981-04-17 |
FR2467312B1 FR2467312B1 (en) | 1984-08-10 |
Family
ID=9230427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7924964A Granted FR2467312A1 (en) | 1979-10-08 | 1979-10-08 | Lock nut for screw - has double, internal, hexagonal key drive hole to facilitate complete dismantling |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2467312A1 (en) |
Cited By (26)
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 |
USRE47551E1 (en) | 2005-02-22 | 2019-08-06 | Roger P. Jackson | Polyaxial bone screw with spherical capture, compression insert and alignment and retention structures |
US11147591B2 (en) | 2004-11-10 | 2021-10-19 | Roger P Jackson | Pivotal bone anchor receiver assembly with threaded closure |
US11229457B2 (en) | 2009-06-15 | 2022-01-25 | Roger P. Jackson | Pivotal bone anchor assembly with insert tool deployment |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
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US8377100B2 (en) | 2000-12-08 | 2013-02-19 | Roger P. Jackson | Closure for open-headed medical implant |
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 |
US8876868B2 (en) | 2002-09-06 | 2014-11-04 | Roger P. Jackson | Helical guide and advancement flange with radially loaded lip |
US8282673B2 (en) | 2002-09-06 | 2012-10-09 | Jackson Roger P | Anti-splay medical implant closure with multi-surface removal aperture |
US8137386B2 (en) | 2003-08-28 | 2012-03-20 | Jackson Roger P | Polyaxial bone screw apparatus |
US8926670B2 (en) | 2003-06-18 | 2015-01-06 | Roger P. Jackson | Polyaxial bone screw assembly |
US8366753B2 (en) | 2003-06-18 | 2013-02-05 | Jackson Roger P | Polyaxial bone screw assembly with fixed retaining structure |
US8398682B2 (en) | 2003-06-18 | 2013-03-19 | Roger P. Jackson | Polyaxial bone screw assembly |
EP1811911A4 (en) | 2004-11-10 | 2012-01-11 | Roger P Jackson | Helical guide and advancement flange with break-off extensions |
US8926672B2 (en) | 2004-11-10 | 2015-01-06 | Roger P. Jackson | Splay control closure for open bone anchor |
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)
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 |
-
1979
- 1979-10-08 FR FR7924964A patent/FR2467312A1/en active Granted
Patent Citations (3)
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 (30)
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 |
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 |
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 |
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 |
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 |
US7846187B2 (en) | 2000-12-08 | 2010-12-07 | Jackson Roger P | Closure plug for open headed medical implant |
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 |
US11147591B2 (en) | 2004-11-10 | 2021-10-19 | Roger P Jackson | Pivotal bone anchor receiver assembly with threaded closure |
USRE47551E1 (en) | 2005-02-22 | 2019-08-06 | Roger P. Jackson | Polyaxial bone screw with spherical capture, compression insert and alignment and retention structures |
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 |
US11229457B2 (en) | 2009-06-15 | 2022-01-25 | Roger P. Jackson | Pivotal bone anchor assembly with insert tool deployment |
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 |
Also Published As
Publication number | Publication date |
---|---|
FR2467312B1 (en) | 1984-08-10 |
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