EP0694368A1 - Device for sharpening cutting instruments, especially dental instruments like descaling curets - Google Patents

Device for sharpening cutting instruments, especially dental instruments like descaling curets Download PDF

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Publication number
EP0694368A1
EP0694368A1 EP95401788A EP95401788A EP0694368A1 EP 0694368 A1 EP0694368 A1 EP 0694368A1 EP 95401788 A EP95401788 A EP 95401788A EP 95401788 A EP95401788 A EP 95401788A EP 0694368 A1 EP0694368 A1 EP 0694368A1
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EP
European Patent Office
Prior art keywords
base
carriage
stone
sharpening
flat face
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Withdrawn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
EP95401788A
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German (de)
French (fr)
Inventor
Lucette Ouhayoun
Jean-Pierre Ouhayoun
Clément Bataille
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Lo Paro
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Lo Paro
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Application filed by Lo Paro filed Critical Lo Paro
Publication of EP0694368A1 publication Critical patent/EP0694368A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/60—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups
    • B24B3/605—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of tools not covered by the preceding subgroups of surgical or dental instruments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges

Definitions

  • the present invention relates to an apparatus for sharpening cutting instruments, in particular dental instruments such as scaling curettes.
  • Dental instruments such as scaling curettes, have sharp-edged stainless steel tools that quickly dull on contact with dental surfaces.
  • the sharp edge of the tool is rubbed against a sharpening stone provided for this purpose, keeping the curette in a particular orientation relative to the stone.
  • the disc is actually a protractor which provides a reference orientation, but there is no guarantee that the user actually presents the curette in the direction which is indicated by the disc, so that the sharpening of the tool possibly of poor quality if not performed by an experienced practitioner.
  • an apparatus comprising an axially movable carriage provided with supports for sharpening instruments and means for immobilizing the instruments to be sharpened in the supports, in a given direction relative to a stone. to sharpen fixed.
  • these devices include complex and very sensitive adjustment mechanisms which are poorly resistant to hot sterilization treatment.
  • the present invention aims to provide an apparatus for sharpening, in particular dental curettes, but also all instruments for dental use or not comprising a cutting tool mounted on a handle, which is both simple and economical, ensures complete and rapid sharpening of the tool, and does not have the drawbacks mentioned above.
  • the present invention relates to a device for sharpening instruments of the type comprising a handle and a cutting tool mounted on this handle, in particular dental curettes, comprising a base and a sharpening stone secured to the base and having a flat face on top. of the base, a carriage mounted sliding on the base, in a direction parallel to the flat face of the stone to be sharpened, and provided with at least one substantially rectilinear groove, inclined at a predetermined angle relative to the flat face of the sharpening stone and able to receive the handle of an instrument, the cutting tool of which is applied against the flat face of the sharpening stone, characterized in that the said carriage has a bearing zone adjacent to the said groove and arranged to so as to allow a user to press his hand on the carriage to make it slide on the base, while holding, with the same hand, an instrument whose handle is in embedded in the groove and whose cutting tool is applied against the flat face of the stone.
  • the device according to the invention is particularly simple to use and ensures good orientation of the instrument during its sharpening.
  • the instrument to be sharpened remains oriented in a fixed direction while the carriage slides parallel to the flat face of the stone.
  • the cutting tool of the instrument can be sharpened in its flat parts as well as in its curved parts, owing to the fact that it is the user who maintains the handle of the instrument. It is therefore easy, while retaining the appropriate orientation provided by the groove, to rotate the instrument during the movement of the carriage to sharpen curved parts of the cutting tool.
  • the instrument is held by the user, it is possible to adapt the bearing force of the cutting tool on the stone to be sharpened, depending on the type of instrument to be sharpened.
  • the device according to the invention is particularly easy to use and allows, in a reliable and rapid manner, to sharpen all kinds of tools for cutting dental instruments.
  • the base has a longitudinal groove which passes through it from one end to the other, being parallel to the face of the stone to be sharpened, while the carriage comprises a sliding bar, preferably made of fluoropolymer material, of which the cross section corresponds to that of the groove.
  • the carriage can be maneuvered back and forth while being guided by the groove during the sharpening of a tool.
  • the carriage is constituted by an elongated body in one piece, inscribed in a parallelogram having a thickness of the order of 2 or 3 cm, a height of the order of 5 cm and a length of the order of 16 cm.
  • the slide bar of the carriage can then be secured to the latter by one of its long sides, so that the carriage has its two large faces perpendicular to the stone to be sharpened when the slide rod is engaged in the groove of the base.
  • a plurality of lateral grooves, inclined at different angles ranging from about 5 ° to about 75 ° relative to the flat face of the stone, can be arranged in the large faces of the carriage.
  • the device is symmetrical with respect to a plane perpendicular to the flat face of the stone to be sharpened passing through the sliding axis of the carriage.
  • the carriage has identical grooves on each of its two lateral faces and the base comprises a stone to be sharpened on either side of the groove.
  • the sharpening stone is in the form of a plate, the two large opposite faces of which are suitable for sharpening a tool.
  • the base then supports said stone to be sharpened in the form of a plate while preserving a free space along an edge and facing the underside of the stone so as to allow the sharpening of a tool against the underside of said Pierre.
  • the base has at its lower part a gripping zone which allows the device according to the invention to be used while holding the base in one hand.
  • the device according to the invention can easily withstand a hot sterilization treatment.
  • a zinc and metal alloy can be used, for example zamac.
  • the carriage 1 consists of a metallic upper part 2, produced in this case in a brushed zinc-aluminum alloy, and of a sliding bar 3 made of fluoropolymer.
  • the metal part 2 of the carriage has a vertical section approximately in the form of a quarter of an ellipse, the rounded upper edge 6 of which forms a support zone for the hand of a user.
  • the metal part 2 has two large parallel flat faces 4 and 5 along its rounded edge 6 and two curved walls 7 which move towards each other from said flat faces 4 and 5 to its straight edge 8, so that the thickness E of the rounded edge 6 is greater than the thickness e of the straight edge 8.
  • Rectilinear grooves of constant section 9 are formed in the walls 4 and 5, and die in the walls 7 and 8.
  • the axes of the different grooves 9 are inclined relative to the straight edge 8 at an angle varying from about 5 ° to about 75 °.
  • the distribution of these angles is determined according to the inclinations used to sharpen the most common instruments. For example, it is advantageous to provide a pitch of 5 ° between two grooves.
  • the sliding bar 3 has a parallelepiped shape of thickness e .
  • each groove 9 is substantially parallel to the walls 4 and 5
  • the lower end of each groove 9 opens into the void, next to the curved walls 7 and the sliding bar 3.
  • the base 10 is also made of a brushed zinc-aluminum alloy and has a shape which fits into a rectangular parallelepiped.
  • a longitudinal groove 11 crosses the base 10 from one to the other of its two end walls 12 and 13.
  • the base 10 comprises, on its upper face, a recess 14 with a flat bottom 15 in which is housed a sharpening stone 16, which is retained at its ends by edges 17 which are overhanging the bottom 15 of the recess.
  • Each sharpening stone 16 is in the form of a plate, the two large faces of which are capable of sharpening a tool.
  • Flexible shims 18 are located on the bottom 15, facing the edges 17 to support and retain the stones to be sharpened.
  • the thickness of the shims 18 is chosen so that any untimely sliding of the stones is prevented during the use of the device, the removal of said stones being however possible by exerting sufficient force by hand on them.
  • the sides 19, 20 and the bottom 21 of the base 10 are also hollowed out so as to form a grip zone 22, which makes it possible to hold the base in a substantially horizontal position to use the device in the absence of support.
  • Flexible wedges 23 are also provided at the four lower corners of the base to form the feet in the event of use of the device on a support.
  • the device according to the invention is used as illustrated in FIG. 3.
  • a sharpening instrument here, a dental curette 24 comprising a handle 25 and a cutting tool 26 at the end of this handle, is held by the hand of a user in a groove 9 having the appropriate inclination.
  • the user leans on the support zone 6 of the carriage and slides the carriage in the groove 11 by giving it a back and forth movement as indicated by the double arrow 27.
  • the user thus sharpens the cutting tool 26 in a reliable and rapid manner.
  • the user can adjust the position of the instrument in groove 9, by rotating it for example around its longitudinal axis, so as to sharpen all the cutting parts of the tool.
  • the guidance provided by the groove 9 ensures that the orientation of the instrument relative to the stone to be sharpened remains substantially constant.
  • the user can vary the bearing force of the cutting tool against the stone to be sharpened, for example to insist on sharpening when the carriage moves in one direction and to release the force when the carriage moves in reverse.
  • the recess formed by the curved walls 6 and 7 below the faces 4 and 5 facilitates the use of the device by providing clearance between the carriage and the stone to be sharpened.
  • a dental curette has been shown immobilized by the thumb of the user does not limit the possibilities of using the device according to the invention to this method of gripping the carriage and the instrument to sharpen.
  • the user could hold the curette between his thumb and forefinger by housing it in a groove on the other side of the carriage, which can give him greater freedom of maneuver for adjusting the position of the instrument and the force to be exerted on the cutting tool during sharpening.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

The dental scraper (24) comprises a haft (25) with a grinding tool (26). The grinding apparatus comprises a base (10) and a sharpening stone (16) having a flat face on top of the base. A carriage (1), sliding on the base in a direction parallel to the flat face of the sharpening stone, has a rectilinear groove (9). This groove is inclined at a predetermined angle to the sharpening stone plane face and receives the haft of the tool. The carriage has a support zone (6) adjacent to the groove arranged so as to allow the user to support his hand on the carriage and make it slide on the base. At the same time the hand holds the instrument whose haft is engaged in the groove and keening edge is applied against the sharpening stone. <IMAGE>

Description

La présente invention concerne un appareil pour aiguiser des instruments tranchants, en particulier des instruments dentaires tels que les curettes à détartrer.The present invention relates to an apparatus for sharpening cutting instruments, in particular dental instruments such as scaling curettes.

Les instruments dentaires, tels que les curettes à détartrer comportent des outils à bord tranchant en acier inoxydable qui, au contact des surfaces dentaires, s'émoussent rapidement.Dental instruments, such as scaling curettes, have sharp-edged stainless steel tools that quickly dull on contact with dental surfaces.

De ce fait, ils doivent être fréquemment aiguisés, mais leurs formes très complexes et l'angulation de leurs bords tranchants rendent leur affûtage difficile.Therefore, they must be frequently sharpened, but their very complex shapes and the angulation of their sharp edges make their sharpening difficult.

Pour aiguiser l'outil d'une curette dentaire, on frotte le bord tranchant de l'outil contre une pierre à affûter prévue à cet effet, en maintenant la curette dans une orientation particulière par rapport à la pierre.To sharpen the tool of a dental curette, the sharp edge of the tool is rubbed against a sharpening stone provided for this purpose, keeping the curette in a particular orientation relative to the stone.

Si l'on ne dispose pas d'un appareil à affûter, cette opération peut s'avérer assez longue et requiert en tout état de cause une certaine habileté, du fait que l'inclinaison qu'il convient de donner à l'instrument n'est pas toujours la même mais dépend du type d'outil à aiguiser.If you do not have a sharpening device, this operation can be quite long and in any case requires a certain skill, since the inclination that should be given to the instrument does not is not always the same but depends on the type of sharpening tool.

De US-A-4821462, on connaît déjà un appareil comportant un socle supportant une pierre à affûter à face plane, et un disque monté rotatif autour d'un axe compris dans le plan de la face plane de la pierre à affûter, sur lequel sont portées des inscriptions permettant à un utilisateur de connaître l'orientation qu'il convient de donner à la curette pour bien aiguiser son outil tranchant.From US-A-4821462, an apparatus is already known comprising a base supporting a sharpening stone with a flat face, and a disc mounted to rotate around an axis included in the plane of the flat face of the sharpening stone, on which are written inscriptions allowing a user to know the orientation which it is advisable to give to the curette to sharpen well its sharp tool.

Dans cet appareil, le disque est en fait un rapporteur qui fournit une orientation de référence, mais rien ne garantit que l'utilisateur présente effectivement la curette dans la direction qui est indiquée par le disque, de sorte que l'affûtage de l'outil peut-être de mauvaise qualité s'il n'est pas effectué par un praticien expérimenté.In this device, the disc is actually a protractor which provides a reference orientation, but there is no guarantee that the user actually presents the curette in the direction which is indicated by the disc, so that the sharpening of the tool possibly of poor quality if not performed by an experienced practitioner.

Par ailleurs, on connait, de US-A-2324025, un appareil comportant un support fixe muni de fentes et un moyen d'immobilisation des instruments à affûter dans les fentes, suivant une orientation donnée par rapport à une pierre à affûter, laquelle est axialement déplaçable, de manière à effectuer l'affûtage des instruments.Furthermore, there is known from US-A-2324025 an apparatus comprising a fixed support provided with slots and a means of immobilizing the instruments to be sharpened in the slots, in an orientation given in relation to a sharpening stone, which is axially displaceable, so as to effect the sharpening of the instruments.

En outre, de DE-A-4010635, on connait un appareil comportant un chariot axialement déplaçable muni de supports d'instruments à affûter et de moyens d'immobilisation des instruments à affûter dans les supports, suivant une direction donnée par rapport à une pierre à affûter fixe.In addition, from DE-A-4010635, there is known an apparatus comprising an axially movable carriage provided with supports for sharpening instruments and means for immobilizing the instruments to be sharpened in the supports, in a given direction relative to a stone. to sharpen fixed.

Ces appareils présentent notamment l'inconvénient de ne pas permettre un affûtage des surfaces de coupe courbes des instruments.These devices have in particular the disadvantage of not allowing a sharpening of the curved cutting surfaces of the instruments.

De plus, ces appareils comportent des mécanismes de réglage complexes et très sensibles qui résistent mal à un traîtement de stérilisation à chaud.In addition, these devices include complex and very sensitive adjustment mechanisms which are poorly resistant to hot sterilization treatment.

La présente invention vise à fournir un appareil pour aiguiser, notamment les curettes dentaires, mais également tous instruments à usage dentaire ou non comportant un outil tranchant monté sur un manche, qui soit à la fois simple et économique, assure un affûtage complet et rapide de l'outil, et ne présente pas les inconvénients rappelés ci-dessus.The present invention aims to provide an apparatus for sharpening, in particular dental curettes, but also all instruments for dental use or not comprising a cutting tool mounted on a handle, which is both simple and economical, ensures complete and rapid sharpening of the tool, and does not have the drawbacks mentioned above.

La présente invention a pour objet un dispositif pour aiguiser des instruments du type comprenant un manche et un outil tranchant monté sur ce manche, notamment des curettes dentaires, comprenant un socle et une pierre à affûter assujettie au socle et présentant une face plane sur le dessus du socle, un chariot monté coulissant sur le socle, selon une direction parallèle à la face plane de la pierre à affûter, et muni d'au moins une rainure sensiblement rectiligne, inclinée d'un angle prédéterminé par rapport à la face plane de la pierre à affûter et apte à recevoir le manche d'un instrument dont l'outil tranchant est appliqué contre la face plane de la pierre à affûter, caractérisé par le fait que ledit chariot comporte une zone d'appui adjacente à ladite rainure et agencée de manière à permettre à un utilisateur d'appuyer sa main sur le chariot pour le faire coulisser sur le socle, tout en maintenant, avec la même main, un instrument dont le manche est engagé dans la rainure et dont l'outil tranchant est appliqué contre la face plane de la pierre.The present invention relates to a device for sharpening instruments of the type comprising a handle and a cutting tool mounted on this handle, in particular dental curettes, comprising a base and a sharpening stone secured to the base and having a flat face on top. of the base, a carriage mounted sliding on the base, in a direction parallel to the flat face of the stone to be sharpened, and provided with at least one substantially rectilinear groove, inclined at a predetermined angle relative to the flat face of the sharpening stone and able to receive the handle of an instrument, the cutting tool of which is applied against the flat face of the sharpening stone, characterized in that the said carriage has a bearing zone adjacent to the said groove and arranged to so as to allow a user to press his hand on the carriage to make it slide on the base, while holding, with the same hand, an instrument whose handle is in embedded in the groove and whose cutting tool is applied against the flat face of the stone.

On comprend que le dispositif selon l'invention est particulièrement simple à utiliser et assure une bonne orientation de l'instrument pendant son affûtage.It is understood that the device according to the invention is particularly simple to use and ensures good orientation of the instrument during its sharpening.

En effet, étant guidé par la rainure, mais maintenu par l'utilisateur, l'instrument à affûter demeure orienté dans une direction fixe tandis que le chariot coulisse parallèlement à la face plane de la pierre.Indeed, being guided by the groove, but maintained by the user, the instrument to be sharpened remains oriented in a fixed direction while the carriage slides parallel to the flat face of the stone.

Grâce à l'invention, l'outil tranchant de l'instrument peut être affûté dans ses parties planes ainsi que dans ses parties courbes, du fait que c'est l'utilisateur qui maintient le manche de l'instrument. Il est donc aisé, tout en conservant l'orientation adéquate fournie par la rainure, de faire pivoter l'instrument pendant le déplacement du chariot pour affûter des parties courbes de l'outil de coupe.Thanks to the invention, the cutting tool of the instrument can be sharpened in its flat parts as well as in its curved parts, owing to the fact that it is the user who maintains the handle of the instrument. It is therefore easy, while retaining the appropriate orientation provided by the groove, to rotate the instrument during the movement of the carriage to sharpen curved parts of the cutting tool.

De plus, du fait que l'instrument est maintenu par l'utilisateur, il est possible d'adapter la force d'appui de l'outil tranchant sur la pierre à affûter, en fonction du type d'instrument à affûter.In addition, because the instrument is held by the user, it is possible to adapt the bearing force of the cutting tool on the stone to be sharpened, depending on the type of instrument to be sharpened.

Le dispositif selon l'invention est particulièrement facile à utiliser et permet, d'une manière fiable et rapide, d'affûter toutes sortes d'outils de coupe d'instruments dentaires.The device according to the invention is particularly easy to use and allows, in a reliable and rapid manner, to sharpen all kinds of tools for cutting dental instruments.

Avantageusement, le socle comporte une gorge longitudinale qui le traverse d'une extrémité à l'autre, en étant parallèle à la face de la pierre à affûter, tandis que le chariot comporte un barreau de coulissement, de préférence en matériau polymère fluoré, dont la section transversale correspond à celle de la gorge.Advantageously, the base has a longitudinal groove which passes through it from one end to the other, being parallel to the face of the stone to be sharpened, while the carriage comprises a sliding bar, preferably made of fluoropolymer material, of which the cross section corresponds to that of the groove.

De cette manière, le chariot peut être manoeuvré dans un mouvement de va-et-vient en étant guidé par la gorge pendant l'affûtage d'un outil.In this way, the carriage can be maneuvered back and forth while being guided by the groove during the sharpening of a tool.

Avantageusement, le chariot est constitué par un corps allongé d'un seul tenant, inscrit dans un parallélogramme présentant une épaisseur de l'ordre de 2 ou 3 cm, une hauteur de l'ordre de 5 cm et une longueur de l'ordre de 16 cm.Advantageously, the carriage is constituted by an elongated body in one piece, inscribed in a parallelogram having a thickness of the order of 2 or 3 cm, a height of the order of 5 cm and a length of the order of 16 cm.

Le barreau de coulissement du chariot peut alors être solidarisé à ce dernier par un de ses grands côtés, de sorte que le chariot présente ses deux grandes faces perpendiculairement à la pierre à affûter lorsque le barreau de coulissement est engagé dans la gorge du socle.The slide bar of the carriage can then be secured to the latter by one of its long sides, so that the carriage has its two large faces perpendicular to the stone to be sharpened when the slide rod is engaged in the groove of the base.

Une pluralité de rainures latérales, inclinées suivant des angles différents allant d'environ 5° à environ 75° par rapport à la face plane de la pierre, peuvent être ménagées dans les grandes faces du chariot.A plurality of lateral grooves, inclined at different angles ranging from about 5 ° to about 75 ° relative to the flat face of the stone, can be arranged in the large faces of the carriage.

Dans un mode de réalisation préféré, le dispositif est symétrique par rapport à un plan perpendiculaire à la face plane de la pierre à affûter passant par l'axe de coulissement du chariot.In a preferred embodiment, the device is symmetrical with respect to a plane perpendicular to the flat face of the stone to be sharpened passing through the sliding axis of the carriage.

En d'autres termes, le chariot comporte des rainures identiques sur chacune de ses deux faces latérales et le socle comporte une pierre à affûter de part et d'autre de la gorge.In other words, the carriage has identical grooves on each of its two lateral faces and the base comprises a stone to be sharpened on either side of the groove.

Dans un mode de réalisation particulier, la pierre à affûter se présente sous la forme d'une plaque dont les deux grandes faces opposées sont aptes à servir à l'affûtage d'un outil.In a particular embodiment, the sharpening stone is in the form of a plate, the two large opposite faces of which are suitable for sharpening a tool.

Le socle supporte alors ladite pierre à affûter en forme de plaque en préservant un espace libre le long d'un bord et en regard de la face inférieure de la pierre de manière à permettre l'affûtage d'un outil contre la face inférieure de ladite pierre.The base then supports said stone to be sharpened in the form of a plate while preserving a free space along an edge and facing the underside of the stone so as to allow the sharpening of a tool against the underside of said Pierre.

Avantageusement, le socle comporte à sa partie inférieure une zone de préhension qui permet d'utiliser le dispositif selon l'invention en tenant le socle dans une main.Advantageously, the base has at its lower part a gripping zone which allows the device according to the invention to be used while holding the base in one hand.

On comprend que, ne comportant ni réglage ni pièce mobile à l'exception du chariot, le dispositif selon l'invention peut résister sans difficulté à un traitement de stérilisation à chaud.It is understood that, having no adjustment or moving part with the exception of the carriage, the device according to the invention can easily withstand a hot sterilization treatment.

Pour réaliser le socle et le chariot, on peut utiliser un alliage de zinc et de métal, par exemple le zamac.To make the base and the trolley, a zinc and metal alloy can be used, for example zamac.

Dans le but de mieux faire comprendre l'invention, on va en décrire maintenant un mode de réalisation donné à titre d'exemple non limitatif en référence au dessin annexé dans lequel :

  • la figure 1A est une vue en élévation du chariot,
  • la figure 1B est une vue en élévation du socle,
  • les figures 2A et 2B sont des vues en coupe selon II-II des figures 1A et 1B et,
  • la figure 3 est une vue en perspective du dispositif en cours d'utilisation.
In order to better understand the invention, we will now describe an embodiment given by way of non-limiting example with reference to the accompanying drawing in which:
  • FIG. 1A is an elevation view of the carriage,
  • FIG. 1B is an elevation view of the base,
  • FIGS. 2 A and 2 B are sectional views along II-II of FIGS. 1 A and 1 B and,
  • Figure 3 is a perspective view of the device in use.

Le chariot 1 se compose d'une partie supérieure métallique 2, réalisée dans le cas présent en un alliage zinc-aluminium brossé, et d'un barreau de coulissement 3 réalisé en polymère fluoré.The carriage 1 consists of a metallic upper part 2, produced in this case in a brushed zinc-aluminum alloy, and of a sliding bar 3 made of fluoropolymer.

Ces deux pièces sont solidarisées par vissage.These two parts are secured by screwing.

La partie métallique 2 du chariot présente une section verticale approximativement en forme de quart d'ellipse, dont le bord supérieur arrondi 6 constitue une zone d'appui pour la main d'un utilisateur.The metal part 2 of the carriage has a vertical section approximately in the form of a quarter of an ellipse, the rounded upper edge 6 of which forms a support zone for the hand of a user.

La partie métallique 2 comporte deux grandes faces planes parallèles 4 et 5 le long de son bord arrondi 6 et deux parois incurvées 7 qui vont en se rapprochant l'une de l'autre depuis lesdites faces planes 4 et 5 jusqu'à son bord rectiligne 8, de sorte que l'épaisseur E du bord arrondi 6 est plus grande que l'épaisseur e du bord rectiligne 8.The metal part 2 has two large parallel flat faces 4 and 5 along its rounded edge 6 and two curved walls 7 which move towards each other from said flat faces 4 and 5 to its straight edge 8, so that the thickness E of the rounded edge 6 is greater than the thickness e of the straight edge 8.

Des rainures rectilignes de section constante 9 sont ménagées dans les parois 4 et 5, et viennent mourir dans les parois 7 et 8.Rectilinear grooves of constant section 9 are formed in the walls 4 and 5, and die in the walls 7 and 8.

Ces rainures 9 sont adjacentes à la zone d'appui 6.These grooves 9 are adjacent to the support zone 6.

Les axes des différentes rainures 9 sont inclinés par rapport au bord rectiligne 8 d'un angle variant d'environ 5° à environ 75°.The axes of the different grooves 9 are inclined relative to the straight edge 8 at an angle varying from about 5 ° to about 75 °.

La distribution de ces angles est déterminée en fonction des inclinaisons utilisées pour aiguiser les instruments les plus courants. Par exemple, il est avantageux de prévoir un pas de 5° entre deux rainures.The distribution of these angles is determined according to the inclinations used to sharpen the most common instruments. For example, it is advantageous to provide a pitch of 5 ° between two grooves.

Pour des raisons de clarté, on n'a représenté que six rainures sur le dessin.For reasons of clarity, only six grooves have been shown in the drawing.

Le barreau de coulissement 3 présente une forme parallélépipédique d'épaisseur e.The sliding bar 3 has a parallelepiped shape of thickness e .

Les axes des rainures 9 étant sensiblement parallèles aux parois 4 et 5, l'extrémité inférieure de chaque rainure 9 débouche dans le vide, à côté des parois incurvées 7 et du barreau de coulissement 3.The axes of the grooves 9 being substantially parallel to the walls 4 and 5, the lower end of each groove 9 opens into the void, next to the curved walls 7 and the sliding bar 3.

Dans le mode de réalisation décrit, le socle 10 est également réalisé en un alliage zinc-aluminium brossé et présente une forme qui s'inscrit dans un parallélépipède rectangle.In the embodiment described, the base 10 is also made of a brushed zinc-aluminum alloy and has a shape which fits into a rectangular parallelepiped.

Une gorge longitudinale 11 traverse le socle 10 de l'une à l'autre de ses deux parois d'extrémité 12 et 13.A longitudinal groove 11 crosses the base 10 from one to the other of its two end walls 12 and 13.

De part et d'autre de cette gorge 11, le socle 10 comporte, sur sa face supérieure, un évidement 14 à fond plat 15 dans lequel vient se loger une pierre à affûter 16, laquelle est retenue à ses extrémités par des bords 17 qui se trouvent en surplomb du fond 15 de l'évidement.On either side of this groove 11, the base 10 comprises, on its upper face, a recess 14 with a flat bottom 15 in which is housed a sharpening stone 16, which is retained at its ends by edges 17 which are overhanging the bottom 15 of the recess.

Chaque pierre à affûter 16 se présente sous la forme d'une plaque dont les deux grandes faces sont aptes à aiguiser un outil.Each sharpening stone 16 is in the form of a plate, the two large faces of which are capable of sharpening a tool.

Des cales souples 18 sont situées sur le fond 15, en regard des bords 17 pour supporter et retenir les pierres à aiguiser.Flexible shims 18 are located on the bottom 15, facing the edges 17 to support and retain the stones to be sharpened.

L'épaisseur des cales 18 est choisie de telle sorte que tout glissement intempestif des pierres soit empêché lors de l'utilisation du dispositif, le retrait desdites pierres étant toutefois possible en exerçant à la main une force suffisante sur celles-ci.The thickness of the shims 18 is chosen so that any untimely sliding of the stones is prevented during the use of the device, the removal of said stones being however possible by exerting sufficient force by hand on them.

Les côtés 19, 20 et le fond 21 du socle 10 sont également évidés de manière à former une zone de préhension 22, ce qui permet de tenir le socle en position sensiblement horizontale pour utiliser le dispositif en l'absence de support.The sides 19, 20 and the bottom 21 of the base 10 are also hollowed out so as to form a grip zone 22, which makes it possible to hold the base in a substantially horizontal position to use the device in the absence of support.

Des cales souples 23 sont en outre prévues aux quatre coins inférieurs du socle pour en constituer les pieds dans l'hypothèse d'une utilisation du dispositif sur un support.Flexible wedges 23 are also provided at the four lower corners of the base to form the feet in the event of use of the device on a support.

Le dispositif selon l'invention s'utilise comme illustré à la figure 3.The device according to the invention is used as illustrated in FIG. 3.

Un instrument à aiguiser, ici, une curette dentaire 24 comportant un manche 25 et un outil tranchant 26 à l'extrémité de ce manche, est maintenu par la main d'un utilisateur dans une rainure 9 présentant l'inclinaison appropriée.A sharpening instrument, here, a dental curette 24 comprising a handle 25 and a cutting tool 26 at the end of this handle, is held by the hand of a user in a groove 9 having the appropriate inclination.

A l'aide de la même main, l'utilisateur s'appuie sur la zone d'appui 6 du chariot et fait coulisser le chariot dans la gorge 11 en lui imprimant un mouvement de va-et-vient comme indiqué par la double flèche 27.Using the same hand, the user leans on the support zone 6 of the carriage and slides the carriage in the groove 11 by giving it a back and forth movement as indicated by the double arrow 27.

L'utilisateur aiguise ainsi l'outil tranchant 26 d'une manière fiable et rapide.The user thus sharpens the cutting tool 26 in a reliable and rapid manner.

Pendant l'affûtage, l'utilisateur peut ajuster la position de l'instrument dans la rainure 9, en le faisant tourner par exemple autour de son axe longitudinal, de manière à affûter toutes les parties coupantes de l'outil.During sharpening, the user can adjust the position of the instrument in groove 9, by rotating it for example around its longitudinal axis, so as to sharpen all the cutting parts of the tool.

Le guidage assuré par la rainure 9 garantit que l'orientation de l'instrument par rapport à la pierre à affûter demeure sensiblement constant.The guidance provided by the groove 9 ensures that the orientation of the instrument relative to the stone to be sharpened remains substantially constant.

De plus, l'utilisateur peut faire varier la force d'appui de l'outil tranchant contre la pierre à affûter, par exemple pour insister sur l'affûtage lorsque le chariot se déplace dans un sens et pour relacher l'effort lorsque le chariot se déplace en sens inverse.In addition, the user can vary the bearing force of the cutting tool against the stone to be sharpened, for example to insist on sharpening when the carriage moves in one direction and to release the force when the carriage moves in reverse.

Pour certains outils de forme complexe, il peut être avantageux de frotter le bord tranchant de l'outil contre la face inférieure de la pierre, ce que le dispositif selon l'invention permet grâce à la présence des cales 18 qui surélèvent la pierre 16 par rapport au fond 15 de l'évidement 14. Dans ce cas, il peut être nécessaire de déplacer légèrement la pierre vers l'extérieur pour accroître l'espace libre qui sépare son bord intérieur du barreau de coulissement.For certain tools of complex shape, it may be advantageous to rub the cutting edge of the tool against the underside of the stone, which the device according to the invention allows thanks to the presence of wedges 18 which raise the stone 16 by relative to the bottom 15 of the recess 14. In this case, it may be necessary to slightly move the stone outward to increase the free space which separates its inner edge from the sliding bar.

L'évidement formé par les parois incurvées 6 et 7 en dessous des faces 4 et 5 facilite l'utilisation du dispositif en fournissant un dégagement entre le chariot et la pierre à affûter.The recess formed by the curved walls 6 and 7 below the faces 4 and 5 facilitates the use of the device by providing clearance between the carriage and the stone to be sharpened.

Il est bien entendu que le mode de réalisation qui vient d'être décrit ne présente aucun caractère limitatif et qu'il pourra recevoir toutes modifications désirables sans sortir pour cela du cadre de l'invention.It is understood that the embodiment which has just been described has no limiting character and that it can receive any desirable modifications without departing from the scope of the invention.

En particulier, le fait que, sur la figure 3, on ait représenté une curette dentaire immobilisée par le pouce de l'utilisateur ne limite pas les possibilités d'utilisation du dispositif selon l'invention à ce mode de préhension du chariot et de l'instrument à affûter. Par exemple, l'utilisateur pourrait maintenir la curette entre son pouce et son index en la logeant dans une rainure située sur l'autre face du chariot, ce qui peut lui conférer une plus grande liberté de manoeuvre pour l'ajustement de la position de l'instrument et de la force à exercer sur l'outil tranchant pendant l'affûtage.In particular, the fact that, in FIG. 3, a dental curette has been shown immobilized by the thumb of the user does not limit the possibilities of using the device according to the invention to this method of gripping the carriage and the instrument to sharpen. For example, the user could hold the curette between his thumb and forefinger by housing it in a groove on the other side of the carriage, which can give him greater freedom of maneuver for adjusting the position of the instrument and the force to be exerted on the cutting tool during sharpening.

Claims (8)

1 - Dispositif pour aiguiser des instruments (24) du type comprenant un manche (25) et un outil tranchant (26) monté sur ce manche, notamment des curettes dentaires, comprenant un socle (10) et une pierre à affûter (16) assujettie au socle et présentant une face plane sur le dessus du socle, un chariot (1) monté coulissant sur le socle (10), selon une direction parallèle à la face plane de la pierre à affûter (16) et muni d'au moins une rainure (9) sensiblement rectiligne, inclinée d'un angle prédéterminé par rapport à la face plane de la pierre à affûter (16) et apte à recevoir le manche (25) d'un instrument (24) dont l'outil tranchant (26) est appliqué contre la face plane de la pierre à affûter (16), caractérisé par le fait que ledit chariot (1) comporte une zone d'appui (6) adjacente à ladite rainure (9) et agencée de manière à permettre à un utilisateur d'appuyer sa main sur le chariot (1) pour le faire coulisser sur le socle (10), tout en maintenant, avec la même main, un instrument (24) dont le manche (25) est engagé dans la rainure et dont l'outil tranchant (26) est appliqué contre la face plane de la pierre à affûter (16). 1 - Device for sharpening instruments (24) of the type comprising a handle (25) and a cutting tool (26) mounted on this handle, in particular dental curettes, comprising a base (10) and a sharpened stone (16) to the base and having a flat face on top of the base, a carriage (1) slidingly mounted on the base (10), in a direction parallel to the flat face of the sharpening stone (16) and provided with at least one substantially straight groove (9), inclined at a predetermined angle relative to the flat face of the sharpening stone (16) and able to receive the handle (25) of an instrument (24) including the cutting tool (26 ) is applied against the flat face of the sharpening stone (16), characterized by the fact that said carriage (1) has a bearing zone (6) adjacent to said groove (9) and arranged so as to allow a user to press his hand on the carriage (1) to slide it on the base (10), while maintaining, with ec the same hand, an instrument (24) whose handle (25) is engaged in the groove and whose cutting tool (26) is applied against the flat face of the stone to be sharpened (16). 2 - Dispositif selon la revendication 1, caractérisé par le fait que le chariot (1) est monté sur un barreau de coulissement (3) en matériau polymère fluoré, tandis que le socle (10) comporte une gorge longitudinale (11) de forme correspondante. 2 - Device according to claim 1, characterized in that the carriage (1) is mounted on a sliding bar (3) of fluoropolymer material, while the base (10) has a longitudinal groove (11) of corresponding shape . 3 - Dispositif selon l'une quelconque des revendications 1 et 2, caractérisé par le fait que le chariot (1) est constitué par un corps allongé d'un seul tenant. 3 - Device according to any one of claims 1 and 2, characterized in that the carriage (1) is constituted by an elongated body in one piece. 4 - Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé par le fait que le chariot (1) comporte une pluralité de rainures latérales (9), inclinées suivant des angles différents allant d'environ 5 à environ 75° par rapport à la face plane de la pierre à affûter (16). 4 - Device according to any one of claims 1 to 3, characterized in that the carriage (1) has a plurality of lateral grooves (9), inclined at different angles ranging from about 5 to about 75 ° relative to to the flat face of the sharpening stone (16). 5 - Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que le dispositif est symétrique par rapport à un plan perpendiculaire à la face plane de la pierre à affûter (16) passant par l'axe de coulissement du chariot (1). 5 - Device according to any one of claims 1 to 4, characterized in that the device is symmetrical with respect to a plane perpendicular to the flat face of the stone to be sharpened (16) passing through the sliding axis of the carriage (1). 6 - Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé par le fait que la pierre à affûter (16) se présente sous la forme d'une plaque qui est apte à aiguiser sur chacune de ses deux grandes faces opposées. 6 - Device according to any one of claims 1 to 5, characterized in that the sharpening stone (16) is in the form of a plate which is capable of sharpening on each of its two large opposite faces. 7 - Dispositif selon la revendication 6, caractérisé par le fait que le socle (10) comporte des cales souples (18) pour supporter la pierre à affûter (16), un espace libre étant ainsi dégagé en dessous de cette dernière. 7 - Device according to claim 6, characterized in that the base (10) comprises flexible shims (18) to support the stone to be sharpened (16), a free space thus being cleared below the latter. 8 - Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé par le fait que le socle (10) comporte une zone de préhension (22) permettant de le saisir. 8 - Device according to any one of claims 1 to 7, characterized in that the base (10) has a gripping area (22) for gripping it.
EP95401788A 1994-07-27 1995-07-27 Device for sharpening cutting instruments, especially dental instruments like descaling curets Withdrawn EP0694368A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409290A FR2723021B1 (en) 1994-07-27 1994-07-27 APPARATUS FOR SHARPENING SHARP INSTRUMENTS, PARTICULARLY DENTAL INSTRUMENTS SUCH AS DESCALING CURETTES
FR9409290 1994-07-27

Publications (1)

Publication Number Publication Date
EP0694368A1 true EP0694368A1 (en) 1996-01-31

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Application Number Title Priority Date Filing Date
EP95401788A Withdrawn EP0694368A1 (en) 1994-07-27 1995-07-27 Device for sharpening cutting instruments, especially dental instruments like descaling curets

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FR (1) FR2723021B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1502701A1 (en) * 2002-02-27 2005-02-02 Nakanishi Inc. Angle positioning tool and hand-scaler grinding device using the same
WO2011007217A1 (en) * 2009-07-16 2011-01-20 Arnold Deppeler Device and method for sharpening dental curettes
CN112247784A (en) * 2020-11-02 2021-01-22 郑州康德泰口腔医疗科技有限公司 Grinding disc for cutting edge of scaling device and using method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324025A (en) 1940-05-13 1943-07-13 John H Revell Dental tool grinder
US4010635A (en) 1976-03-17 1977-03-08 United States Steel Corporation Sonic interference suppressor
GB1499975A (en) * 1975-04-07 1978-02-01 Parsons B Honing apparatus
US4217735A (en) * 1978-11-02 1980-08-19 Mcgeoch James Tool sharpening device
US4821462A (en) 1987-08-31 1989-04-18 Moore Steven B Dental instrument sharpening hone
DE4010635C1 (en) * 1990-04-03 1991-06-27 Berthold 5000 Koeln De Schmitz Grinder-sharpener for dental instruments - has angled holder on carriage with grinding stone between guide members

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324025A (en) 1940-05-13 1943-07-13 John H Revell Dental tool grinder
GB1499975A (en) * 1975-04-07 1978-02-01 Parsons B Honing apparatus
US4010635A (en) 1976-03-17 1977-03-08 United States Steel Corporation Sonic interference suppressor
US4217735A (en) * 1978-11-02 1980-08-19 Mcgeoch James Tool sharpening device
US4821462A (en) 1987-08-31 1989-04-18 Moore Steven B Dental instrument sharpening hone
DE4010635C1 (en) * 1990-04-03 1991-06-27 Berthold 5000 Koeln De Schmitz Grinder-sharpener for dental instruments - has angled holder on carriage with grinding stone between guide members

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1502701A1 (en) * 2002-02-27 2005-02-02 Nakanishi Inc. Angle positioning tool and hand-scaler grinding device using the same
EP1502701A4 (en) * 2002-02-27 2010-06-30 Nakanishi Inc Angle positioning tool and hand-scaler grinding device using the same
WO2011007217A1 (en) * 2009-07-16 2011-01-20 Arnold Deppeler Device and method for sharpening dental curettes
US9126302B2 (en) 2009-07-16 2015-09-08 Arnold Deppeler Device and method for sharpening dental curettes
CN112247784A (en) * 2020-11-02 2021-01-22 郑州康德泰口腔医疗科技有限公司 Grinding disc for cutting edge of scaling device and using method

Also Published As

Publication number Publication date
FR2723021A1 (en) 1996-02-02
FR2723021B1 (en) 1996-09-06

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