FR2673835A1 - Device for blocking, by means of a cam, a connection rod used in orthopaedic surgery - Google Patents

Device for blocking, by means of a cam, a connection rod used in orthopaedic surgery Download PDF

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Publication number
FR2673835A1
FR2673835A1 FR9103368A FR9103368A FR2673835A1 FR 2673835 A1 FR2673835 A1 FR 2673835A1 FR 9103368 A FR9103368 A FR 9103368A FR 9103368 A FR9103368 A FR 9103368A FR 2673835 A1 FR2673835 A1 FR 2673835A1
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FR
France
Prior art keywords
cam
axis
drilled
blocking
support
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.)
Withdrawn
Application number
FR9103368A
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French (fr)
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BRUGUIER PIERRE
Original Assignee
BRUGUIER PIERRE
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Filing date
Publication date
Application filed by BRUGUIER PIERRE filed Critical BRUGUIER PIERRE
Priority to FR9103368A priority Critical patent/FR2673835A1/en
Publication of FR2673835A1 publication Critical patent/FR2673835A1/en
Withdrawn legal-status Critical Current

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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
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/18—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using cams, levers, eccentrics, or toggles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod

Abstract

The invention relates to the use of a cam of ovoid shape for blocking, at the base of its U-shaped seat, a connection rod (5). This device consists of: 1st) a U-shaped rod support (4), 2nd) a CAM (1) of ovoid shape with a striated convex edge, 3rd) a SHAFT (2) made up of three different sections, 4th) a brake SCREW (3). The U-shaped support (4) has its two vertical walls drilled with two holes of different diameters in the horizontal axis. The wall drilled with the smaller diameter is drilled vertically, and at a tangent to the preceding hole, with a blind hole which is threaded over the half of its depth, which will be the seat for the brake screw (3). The cam of ovoid shape has its edge, of convex shape, over a part of its serrated perimeter. It is drilled, in its face, with a hole of square cross-section. A brake screw, screwed into the vertical wall of the U-shaped support, blocks any movement of the shaft and of the cam made integral by its square engagement.

Description

DISPOSITIF de BLOOUAGE par une CAME d'Une TIGE d'UNION utilisée en CHIRURGIE ORTHOPEDIQUE. LOCKING DEVICE with a CAM OF A UNION ROD used in ORTHOPEDIC SURGERY.

CHIRURGIE ORTHOPEDIQUE.  ORTHOPEDIC SURGERY.

La présente invention concerne la création d'un dispositif permettant
de bloquer par une pression plus ou moins forte exercée sur une câme
dz forme ovoidale une tige d'union courament utilisée en chirurgie
orthopédique./.The present invention relates to the creation of a device allowing
to block by a more or less strong pressure exerted on a cable
dz ovoid shape a connecting rod commonly used in surgery
orthopedic./.

Jusqu'a cet instant on utilisait généralement le principe de la vis, ou
de la vis pointeau, de la vis à tête en couronne, ou encore la bille
d'arrêt avec un système de compression réalisé par l'intermédiaire d'un
vissage la rendant solidaire de son support, lui permettant de tenir
sa fonction, la liaison entre different points par une barre d'union
avec une certaine rigidité /.Up to this point we generally used the principle of the screw, or
the needle screw, the crown head screw, or the ball
shutdown with a compression system produced via a
screwing making it integral with its support, allowing it to hold
its function, the connection between different points by a bar of union
with a certain rigidity.

Ces Systèmes utilisées jusque là offrent tous les inconvénients du ser -rage par vissage, comme par exemple: vis mal engagée d'ou pas de vis
forcé, donc sans retenue, ou encore un écartement des branches latérales
du support sous la pression du vissage, etc... malgré des palliatifs plus ou moins réussis./.These systems used until then offer all the disadvantages of tightening by screwing, such as for example: screw badly engaged or not screw
forced, therefore without restraint, or even a separation of the lateral branches
of the support under the pressure of the screwing, etc ... despite more or less successful palliatives.

Le système de bloquage inventé ici permet d'éviter ces inconvénients
et offre une plus grande maîtrise de la pression de serrage./.The blocking system invented here avoids these drawbacks
and offers greater control of the clamping pressure./.

-Construit dans un matériau homologué, conçu à cet effet, il peut s'adapter à tous les besoins de compression ou de bloquage de la tige d'un
ion de diamètre courament utilisée en orthopédie avec des supports en
-U- comme cela est indiqué en 1/4 et 2/4./.-Built in an approved material, designed for this purpose, it can adapt to all the compression or blocking needs of the stem of a
ion of diameter commonly used in orthopedics with supports in
-U- as indicated in 1/4 and 2 / 4. /.

Ce dispositif se compose d'un support de tige en forme de -U-(4), - d' -une Câme de forme ovoïde(l), - d'un AXE (2) constitué de TROIS sections différentes(14) (17)(18), et d'une VIS-Frein (3)./.This device is made up of a rod support in the form of -U- (4), - of an egg-shaped cable (l), - of an AXIS (2) made up of THREE different sections (14) ( 17) (18), and a VIS-Brake (3) ./.

Ce support en -U-(4) dont le fond reçoit la tige d'union(5) offre deux parois verticales de part et d'autre de l'emplacement de cette tige de
liaison. Ces parois verticales sont percées l'une et l'autre d'un trou -de 0 différent dans un axe horizontal./.This support in -U- (4) whose bottom receives the union rod (5) offers two vertical walls on either side of the location of this rod
liaison. These vertical walls are each pierced with a different hole-0 in a horizontal axis./.

La paroi percée du plus petit 0 (6) est aussi percée verticalement et tangentiellement au trou horizontal, d'un trou borgne(8). Ce trou vertical sera fileté sur la moitié de sa profondeur pour recevoir la vis-frein
(3). La Câme de forme ovoïde(l) percée en décentrée par rapport à llase de développé de câme d'un trou de forme carrée(l0). La tranche de cette -câme sur la moitié de son périmètre, a une forme convexe ( 11) pour épouser la forme cylindrique de la tige d'union. Cette partie convexe intérieurement est crantée d'un bord à l'autre(12) et les stries sont inclinées à 450. The pierced wall of the smallest 0 (6) is also pierced vertically and tangentially to the horizontal hole, with a blind hole (8). This vertical hole will be threaded over half its depth to receive the locking screw
(3). The oval-shaped cable (l) pierced off-center with respect to the base of the same developed hole with a square hole (l0). The edge of this -came on half of its perimeter, has a convex shape (11) to match the cylindrical shape of the union rod. This internally convex part is notched from one edge to the other (12) and the ridges are inclined at 450.

La première partie (14) de cet axe d'un 0 inférieur à la dernière partie ( 19) de l'axe est cylindrique correspond parfaitement au 0 du petit trou (6) per- -cé dans la paroi verticale de la branche du -U-., reçoit en son milieu, dans le sens de la longueur une gorge(l5) qui permettra le passage de la vis-frein(l6) qui servira à bloquer tous les mouvements de cet ensemble: #1E-AXE. The first part (14) of this axis with a 0 less than the last part (19) of the axis is cylindrical corresponds perfectly to the 0 of the small hole (6) drilled in the vertical wall of the branch of the - U-., Receives in its middle, lengthwise a groove (l5) which will allow the passage of the locking screw (l6) which will serve to block all movements of this assembly: # 1E-AXIS.

Dans sa partie centrale(l7) cet Axe est de section carrée, dont les dimensions répondent à deux impératifs:-premièrement: il ne peut pas dépasser -le 0 du plus gros trou percé dans la seconde paroi du support en-Upuisqu'il doit y passer, et deuxièment: il doit avoir l'épaisseur de la câme. Cette partie centrale et carrée doit s'emboiter parfaitement dans le trou carré de la câme(l0).In its central part (l7) this Axis is of square section, the dimensions of which meet two imperatives: -first: it cannot exceed -the 0 of the largest hole drilled in the second wall of the support in-Upuisquil pass there, and secondly: it must have the thickness of the cam. This central and square part must fit perfectly into the square hole of the cable (l0).

La dernière section de cet Axe(18), cylindrique, comme l'autre extrémité correspond en longeur à l'épaisseur de la branche du support en -U- est -percée dans son axe longitudinal d'un trou borgne de section carrée(l9) pour recevoir une clé mâle de section carrée dite clé allène(21). The last section of this axis (18), cylindrical, like the other end corresponds in length to the thickness of the branch of the support in -U- is drilled in its longitudinal axis with a blind hole of square section (l9 ) to receive a square section male key called allen key (21).

Une Vis-Frein(3) filetée sur la moitié de sa longueur prend place dans le trou borgne(8), vissée à fond elle empchera toute rotation de 1'AXE-CAME dans un sens ou un autre.A Threaded Screw (3) threaded over half of its length takes place in the blind hole (8), screwed in fully it will prevent any rotation of the AX-CAME in one direction or another.

PRINCIPE de MISE en FONCTION: Le support en -U- étant en place, ayant -reçu au fond de la gorge la tige d'union ou de liaison qui unira les supports entre eux, on place la Câme entre les parois du corps en -U- en appliquant sa partie convexe sur la tige, puis on introduit l'Axe(2) en commentant par l'extrémité formée par le plus petit cylindre(6) dans son logement. La partie centrale carrée (17) aura pris son logement dans la câme et la dernière partie cylindrique de l'axe occupera la branche du support -en -U-. L'Axe sera ainsi parfaitement en place(Fig.21). On vissera alors la vis-frein s'en la bloquer. Puis on introduira la clé mâle de section carrée dans son logement ( 19) et on exercera sur le manche de cette clé un mouvement de rotation afin de faire tourner la Câme, qui de part sa forme ovoïdale comprimera la tige d'union au fond de son logement. Une fois le -bloquage obtenu, on fini de visser à fond le Vis-Frein(3), puis on retire la clé mâle de son logement.PRINCIPLE OF START-UP: The support in -U- being in place, having -received at the bottom of the groove the rod of union or link which will unite the supports between them, the Cable is placed between the walls of the body in - U- by applying its convex part to the rod, then the Axis (2) is introduced, commenting on the end formed by the smallest cylinder (6) in its housing. The square central part (17) will have taken its housing in the cable and the last cylindrical part of the axis will occupy the branch of the support -in -U-. The Axis will thus be perfectly in place (Fig. 21). We will then screw the brake screw to block it. Then we will insert the square section male key into its housing (19) and we will exert on the handle of this key a rotational movement in order to rotate the Cable, which due to its ovoid shape will compress the union rod at the bottom of his accommodation. Once -blocking obtained, we finish screwing the Screw-Brake (3), then remove the male key from its housing.

L'invention trouve une application particulièrement adapté au bloquage de tige d'union utilisée en chirurgie orthopédique.The invention finds an application particularly suitable for blocking the union rod used in orthopedic surgery.

L'invention n'est nullement limitée aux exemples décrits mais en embrassant au contraire toutes les variantes d'exécution./. The invention is in no way limited to the examples described, but on the contrary embraces all of the variant embodiments.

Claims (5)

.REVENDICATIONS.. CLAIMS. **************** -1-: Dispositif pour bloquer une tige d'union appliquable notament en chirurgie orthopédique caractérisé en ce qu'il comporte un support en forme de -U-(4) au fond duquel est disposé une tige d'union(5) blocable au fond du support par la rotation d'une câme ovoide(l) dont une partie de sa périphérie est conformée à la section de la tige d'union(5) et en ce que la rotation de la câme(l) est assurée par un moyen d'actionnement constitué par un axe(2) prenant appui sur les deux branches du support(4) et s'engageant avec la câme(5), l'axe étant blocable par une vis-frein(3). **************** -1-: Device for blocking a union rod applicable in particular in orthopedic surgery, characterized in that it comprises a support in the form of -U- (4 ) at the bottom of which is arranged a union rod (5) lockable at the bottom of the support by the rotation of an ovoid cam (l) of which a part of its periphery is conformed to the section of the union rod (5) and in that the rotation of the cam (l) is ensured by an actuating means constituted by an axis (2) bearing on the two branches of the support (4) and engaging with the cam (5), l 'axis being lockable by a locking screw (3). -2-: Dispositif selon la revendication 1 caractérisé en ce que l'axe de rotation de la câme(l) est décentré par rapport à l'axe de développé de câme./.-2-: Device according to claim 1 characterized in that the axis of rotation of the cam (l) is offset from the axis of the cam developed. /. -3-: Dispositif selon les revendications précédentes caractérisé en ce que la câme(l) comporte sur ou moins une partie de sa périphérie une forme convexe(ll) pourvue de crans(l2) conformée à la section de la tige d'union (5)./. -3-: Device according to the preceding claims characterized in that the cable (l) comprises on or at least part of its periphery a convex shape (ll) provided with notches (l2) conformed to the section of the union rod ( 5) ./. -4-: Dispositif selon l'une des revendications précédentes caractérisé en ce que le moyen d'actionnant de câme est constitué par un Axe(2) pourvu d'extrémités cylindriques(l8),(14), prenant appui sur les branches du -Uet dont la partie centrale(l7) présente une section carrée s'engageant dans la câme ovoïde(I)./.  -4-: Device according to one of the preceding claims characterized in that the actuating means of cam is constituted by an axis (2) provided with cylindrical ends (18), (14), bearing on the branches of the -Uet of which the central part (l7) has a square section engaging in the ovoid cam (I) ./. -5-: Dispositif selon la revendication 4 caractérisé en ce que l'extrém ité(14) de l'Axe(2) est pourvu d'une gorge(15) qui coopère avec une visfrein(3) afin de former une butée d'arrêt pour l'axe(2) après blocage de la cârne(l)./. -5-: Device according to claim 4 characterized in that the end (14) of the axis (2) is provided with a groove (15) which cooperates with a screw (3) to form a stop d 'stop for the axis (2) after blocking of the cap (l) ./.
FR9103368A 1991-03-15 1991-03-15 Device for blocking, by means of a cam, a connection rod used in orthopaedic surgery Withdrawn FR2673835A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9103368A FR2673835A1 (en) 1991-03-15 1991-03-15 Device for blocking, by means of a cam, a connection rod used in orthopaedic surgery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9103368A FR2673835A1 (en) 1991-03-15 1991-03-15 Device for blocking, by means of a cam, a connection rod used in orthopaedic surgery

Publications (1)

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FR2673835A1 true FR2673835A1 (en) 1992-09-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994006363A1 (en) * 1992-09-19 1994-03-31 Dietmar Pennig Osteosynthesis aid
DE20010207U1 (en) * 2000-06-09 2001-10-25 Biomet Merck Deutschland Gmbh Blocking element
WO2009004347A1 (en) * 2007-07-03 2009-01-08 Raffan, Peter Pin clamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR908931A (en) * 1945-02-01 1946-04-23 Tensioner connector for the instant connection or hooking up of tensioned metal wires and cables
FR2435996A1 (en) * 1978-09-13 1980-04-11 Gentile Giulio SCREW TYPE PLIERS, ESPECIALLY USED IN BONE SURGERY
GB2101194A (en) * 1981-07-07 1983-01-12 Access Plant Fastening elongate members
US4786204A (en) * 1986-02-24 1988-11-22 The Eversman Mfg. Company Clamping apparatus with bi-directional clamping device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR908931A (en) * 1945-02-01 1946-04-23 Tensioner connector for the instant connection or hooking up of tensioned metal wires and cables
FR2435996A1 (en) * 1978-09-13 1980-04-11 Gentile Giulio SCREW TYPE PLIERS, ESPECIALLY USED IN BONE SURGERY
GB2101194A (en) * 1981-07-07 1983-01-12 Access Plant Fastening elongate members
US4786204A (en) * 1986-02-24 1988-11-22 The Eversman Mfg. Company Clamping apparatus with bi-directional clamping device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994006363A1 (en) * 1992-09-19 1994-03-31 Dietmar Pennig Osteosynthesis aid
US5443465A (en) * 1992-09-19 1995-08-22 Pennig; Dietmar Osteosynthesis aid
DE20010207U1 (en) * 2000-06-09 2001-10-25 Biomet Merck Deutschland Gmbh Blocking element
WO2009004347A1 (en) * 2007-07-03 2009-01-08 Raffan, Peter Pin clamp

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