FR2491757A2 - Dental treatment angle piece - has cylindrical sleeve enclosing tool stem and held in place by radial flange - Google Patents

Dental treatment angle piece - has cylindrical sleeve enclosing tool stem and held in place by radial flange Download PDF

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Publication number
FR2491757A2
FR2491757A2 FR8021687A FR8021687A FR2491757A2 FR 2491757 A2 FR2491757 A2 FR 2491757A2 FR 8021687 A FR8021687 A FR 8021687A FR 8021687 A FR8021687 A FR 8021687A FR 2491757 A2 FR2491757 A2 FR 2491757A2
Authority
FR
France
Prior art keywords
tool
orifice
sleeve
diameter
cylindrical sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8021687A
Other languages
French (fr)
Other versions
FR2491757B2 (en
Inventor
Michel Seigneurin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Micro Mega SA
Original Assignee
Micro Mega SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Micro Mega SA filed Critical Micro Mega SA
Priority to FR8021687A priority Critical patent/FR2491757A2/en
Priority to CH201481A priority patent/CH640718A5/en
Priority to AT0161481A priority patent/AT372596B/en
Priority to DE19813114207 priority patent/DE3114207A1/en
Priority to US06/253,649 priority patent/US4369034A/en
Priority to IT8121714U priority patent/IT8121714V0/en
Priority to IT21622/81A priority patent/IT1137579B/en
Publication of FR2491757A2 publication Critical patent/FR2491757A2/en
Application granted granted Critical
Publication of FR2491757B2 publication Critical patent/FR2491757B2/fr
Granted legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
    • A61C1/05—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with turbine drive
    • A61C1/052—Ducts for supplying driving or cooling fluid, e.g. air, water
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
    • A61C1/181—Bearings or lubricating arrangements, e.g. air-cushion bearings

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

The angle-piece of a dental instrument has a seal for preventing water penetration into the head (11), containing a rotary chuck (13) for the tool, while an opening (17) in a wall (11a) accommodates a stem (18) of the tool. A cylindrical sleeve (12), whose internal diameter corresponds to the external diameter of the stem, forms an extension of the chuck, and fits in the space between the latter and the wall, with a slight clearance in the wall opening. It is secured in the space concerned by a radial flange (16), whose external diameter is greater than that of the opening.

Description

La demande de brevet principal No 80 10722 a pour objet un dispositif servant a empêcher la penétration d'eau dans la tette d'un contre-angle dentaire dans laquelle est entralnée en rotation la griffe de serrage de l'outil et dont l'extrémité dirigée vers l'outil est fermée par une paroi pourvue d'un orifice de passage de l'outil, comprenant un manchon cylindrique alésé au diamètre de l'outil, place a 1' intérieur de la tête, dans l'axe de la griffe dans l'espace compris entre ladite paroi d'extrémité et l'extrémité de la griffe, ce manchon traversant avec un jeu réduit ledit orifice de passage de l'outil et étant retenu dans ledit espace par une collerette d'un diamètre supérieur au diamètre de l'orifice. The main patent application No. 80 10722 relates to a device for preventing the penetration of water into the tette of a dental contra-angle in which the clamping claw of the tool is entrained in rotation and the end of which directed towards the tool is closed by a wall provided with a hole for the passage of the tool, comprising a cylindrical sleeve bored to the diameter of the tool, placed inside the head, in the axis of the claw in the space between said end wall and the end of the claw, this sleeve passing through with a clearance reduces said orifice for passage of the tool and being retained in said space by a flange with a diameter greater than the diameter of the orifice.

La présente invention se propose de perfectionner le dispositif décrit dans la demande de brevet principal dans le but d'éviter le risque que le manchon s'égare lors du démontage de la tete de la pièce a main. The present invention proposes to improve the device described in the main patent application in order to avoid the risk of the sleeve getting lost during disassembly of the head of the handpiece.

A cet effet, le dispositif selon l'invention est carac terse. par le fait que le manchon est muni a son extrémité inférieure dépassant de la paroi d'extrémité d'un bourrelet annulaire d'ion diamètre supérieur au diamètre de l'orifice et qui, en coopération avec la collerette, le retient dans ledit orifice. To this end, the device according to the invention is characteristic. by the fact that the sleeve is provided at its lower end projecting from the end wall with an annular bead of ion diameter greater than the diameter of the orifice and which, in cooperation with the collar, retains it in said orifice.

Ainsi, lorsque le praticien démonte la tête de la pièce a main, le manchon 20 reste logé dans l'orifice grâce a la collerette et au bourrelet qui encadrent la paroi dans laquelle est formé l'orifice. Le manchon peut éventuellement etre enlevé volontairement de l'orifice en forçant le bourrelet a traverser ledit orifice. Thus, when the practitioner dismantles the head of the handpiece, the sleeve 20 remains housed in the orifice thanks to the collar and the bead which surround the wall in which the orifice is formed. The sleeve can optionally be removed voluntarily from the orifice by forcing the bead to pass through said orifice.

Le dessin annexé représente une forme d'exécution du dispositif selon l'invention. The accompanying drawing shows an embodiment of the device according to the invention.

La figure 3. est une vue schematique, en coupe, de l'ex extrémité d'une tête de contre-angle pourvue du dispositif selon l'invention, avec la fraise représentée partiellement. Figure 3. is a schematic view, in section, of the ex end of a contra-angle head provided with the device according to the invention, with the cutter partially shown.

La figure 2 est une vue en élévation et du manchon seul.  Figure 2 is an elevational view of the sleeve alone.

La tete de contre-angle est, comme dans la seconde forme d'exécution du brevet principal, formée d'une seule pièce 11 et le manchon 20 est placé dans l'orifice 17 du fond lia du corps de tête 11, avant le montage des autres éléments, a savoir la griffe 13 et son coussinet 14. L'extrémité sup6- rieure du manchon 20 est munie d'une colleretLe 16, tandis que son extrémité inferieure est munie d'un bourrelet 21. Les diamètres de la collerette 16 et du bourrelet 21 sont légè- rement supérieurs au diamètre de l'orifice 17 alors que le diamètre de la partie du manchon 20 entre la collerette 16 et le bourrelet 21 est inférieur au diamètre de 1' orifice 17 afin de ménager un espace libre pour le passage de l'air.Le manchon 20 est en outre alése au diamètre de l'outil de façon que lors de la pénétration de l'outil, il se trouve lié a lui par frottement et tourne avec lui. The contra-angle head is, as in the second embodiment of the main patent, formed in one piece 11 and the sleeve 20 is placed in the hole 17 in the bottom 11a of the head body 11, before mounting other elements, namely the claw 13 and its pad 14. The upper end of the sleeve 20 is provided with a collar 16, while its lower end is provided with a bead 21. The diameters of the collar 16 and of the bead 21 are slightly greater than the diameter of the orifice 17 while the diameter of the part of the sleeve 20 between the flange 16 and the bead 21 is less than the diameter of the orifice 17 in order to provide a free space for the passage of air. The sleeve 20 is further bored to the diameter of the tool so that, when the tool penetrates, it is bonded to it by friction and rotates with it.

De préférence, le diamètre du bourrelet 21 est légèrement inférieur au diamètre de la collerette 16, ceci afin de faciliter le montage du manchon 20 dans l'orifice 17. Preferably, the diameter of the bead 21 is slightly less than the diameter of the flange 16, this in order to facilitate the mounting of the sleeve 20 in the orifice 17.

Le manchon 20 est fabrique en toute matière plastique et o blastomère résistant a une température de 180 , par exemple en une matière connue sous la marque TEFLON, de ce fait son montage dans l'orifice 17 est rendu possible en le poussant dans l'orifice jusqu a ce que le bourrelet 21 se comprime pour pénétrer dans l'orifice et se détende ensuite en-dessous du fond lla. Lorsque la fraise F est introduite dans la griffe de serrage 13, elle entrain par frottement le manchon 20, la collerette 16 se déplaçant dans l'espace 15 ménagé entre le fond lia et le coussinet 14. The sleeve 20 is made of any plastic and blastomer resistant to a temperature of 180, for example of a material known under the brand TEFLON, therefore its mounting in the orifice 17 is made possible by pushing it into the orifice until the bead 21 compresses to penetrate the orifice and then relaxes below the bottom 11a. When the cutter F is introduced into the clamping claw 13, it causes the sleeve 20 by friction, the flange 16 moving in the space 15 formed between the bottom 11a and the bearing 14.

Le manchon 20 peut également être fendu afin de faciliter son montage dans l'orifice 17.  The sleeve 20 can also be split in order to facilitate its mounting in the orifice 17.

Claims (2)

REVENDICATIONS 1. Dispositif servant à empêcher la pénétration d'eau dans la tête d'un contre-angle dentaire dans laquelle est entraînée en rotation la griffe de serrage de l'outil et dont l'extrémité dirigée vers l'outil est fermée par une paroi pourvue d'un orifice de passage de l'outil, comprenant un manchon cylindrique alésé au diamètre de l'outil, placé à 11 intérieur de la tête, dans l'axe de la griffe dans l'espace compris entre ladite paroi d'extrémité et l'extrémité de la griffe, ce manchon traversant avec un jeu réduit ledit orifice de passage de l'outil et étant retenu dans ledit espace par une collerette d'un diamètre supérieur au diamètre de l'orifice, caractérisé par le fait que le manchon (20) est en outre muni S son extrémité dépassant de ladite paroi d'extrémité (lia) d'un bourrelet annulaire (21) d'un diamètre supérieur au diamètre de l'orifice (17) et qui, en coopération avec la collerette (16), le retient dans ledit orifice (17). 1. Device used to prevent the penetration of water into the head of a dental contra-angle in which the clamping claw of the tool is rotated and whose end directed towards the tool is closed by a wall provided with a hole for the passage of the tool, comprising a cylindrical sleeve bored to the diameter of the tool, placed inside the head, in the axis of the claw in the space between said end wall and the end of the claw, this sleeve passing through with a clearance reduces said orifice for the passage of the tool and being retained in said space by a flange with a diameter greater than the diameter of the orifice, characterized in that the sleeve (20) is further provided S its end projecting from said end wall (11a) of an annular bead (21) of a diameter greater than the diameter of the orifice (17) and which, in cooperation with the collar (16), retains it in said orifice (17). 2. Dispositif selon la revendication 1, caractérisé par le fait que ledit manchon est en matériau élastique.  2. Device according to claim 1, characterized in that said sleeve is made of elastic material.
FR8021687A 1980-05-13 1980-10-10 Dental treatment angle piece - has cylindrical sleeve enclosing tool stem and held in place by radial flange Granted FR2491757A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR8021687A FR2491757A2 (en) 1980-10-10 1980-10-10 Dental treatment angle piece - has cylindrical sleeve enclosing tool stem and held in place by radial flange
CH201481A CH640718A5 (en) 1980-05-13 1981-03-25 TETE DE CONTRE-ANGLE DENTAIRE COMPRENANT UN DISPOSITIF EMPECHANT LA PENETRATION D'EAU A L'INTERIEUR.
AT0161481A AT372596B (en) 1980-05-13 1981-04-07 ANGLE PIECE FOR DENTAL TREATMENT
DE19813114207 DE3114207A1 (en) 1980-05-13 1981-04-08 ANGLE PIECE FOR DENTAL TREATMENT
US06/253,649 US4369034A (en) 1980-05-13 1981-04-22 Device for preventing the ingress of water into the head of a dental contra-angle
IT8121714U IT8121714V0 (en) 1980-05-13 1981-05-11 DEVICE THAT IS USED TO PREVENT THE PENETRATION OF WATER IN THE HEAD OF A DENTAL COUNTER-ANGLE.
IT21622/81A IT1137579B (en) 1980-05-13 1981-05-11 DEVICE THAT IS USED TO PREVENT THE PENETRATION OF WATER IN THE HEAD OF A DENTAL COUNTER-ANGLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8021687A FR2491757A2 (en) 1980-10-10 1980-10-10 Dental treatment angle piece - has cylindrical sleeve enclosing tool stem and held in place by radial flange

Publications (2)

Publication Number Publication Date
FR2491757A2 true FR2491757A2 (en) 1982-04-16
FR2491757B2 FR2491757B2 (en) 1983-12-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8021687A Granted FR2491757A2 (en) 1980-05-13 1980-10-10 Dental treatment angle piece - has cylindrical sleeve enclosing tool stem and held in place by radial flange

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FR (1) FR2491757A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1441503A (en) * 1965-02-20 1966-06-10 Micro Mega Sa Handpieces
CH416935A (en) * 1964-11-09 1966-07-15 Dale Wiseman Adolph Right Angle Handpiece for Dentistry
FR2207423A5 (en) * 1972-11-21 1974-06-14 Micro Mega Sa
FR2378498A1 (en) * 1977-01-26 1978-08-25 Micro Mega Sa DENTAL HANDPIECE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH416935A (en) * 1964-11-09 1966-07-15 Dale Wiseman Adolph Right Angle Handpiece for Dentistry
FR1441503A (en) * 1965-02-20 1966-06-10 Micro Mega Sa Handpieces
FR2207423A5 (en) * 1972-11-21 1974-06-14 Micro Mega Sa
FR2378498A1 (en) * 1977-01-26 1978-08-25 Micro Mega Sa DENTAL HANDPIECE

Also Published As

Publication number Publication date
FR2491757B2 (en) 1983-12-02

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