FR2482448A1 - Water exclusion seal for dental handpiece - has sleeve inside right-angled head fitting closely in tool opening - Google Patents

Water exclusion seal for dental handpiece - has sleeve inside right-angled head fitting closely in tool opening Download PDF

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Publication number
FR2482448A1
FR2482448A1 FR8010722A FR8010722A FR2482448A1 FR 2482448 A1 FR2482448 A1 FR 2482448A1 FR 8010722 A FR8010722 A FR 8010722A FR 8010722 A FR8010722 A FR 8010722A FR 2482448 A1 FR2482448 A1 FR 2482448A1
Authority
FR
France
Prior art keywords
tool
sleeve
head
claw
dental handpiece
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
FR8010722A
Other languages
French (fr)
Other versions
FR2482448B1 (en
Inventor
Marcel Garnier
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 FR8010722A priority Critical patent/FR2482448A1/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 JP6353581A priority patent/JPS573631A/en
Priority to IT21622/81A priority patent/IT1137579B/en
Priority to IT8121714U priority patent/IT8121714V0/en
Publication of FR2482448A1 publication Critical patent/FR2482448A1/en
Application granted granted Critical
Publication of FR2482448B1 publication Critical patent/FR2482448B1/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

Abstract

The system prevents penetration of water into the right-angle head of a dental handpiece containing a rotary chuck for the tool. The wall at the tool end of the head contains an opening for the tool. A cylindrical sleeve (8), bored to the dia. of the tool, fits inside the head (1) coaxially to the chuck (3), and between the chuck and the end wall (5). The sleeve is a close fit where it passes through the opening (9) for the tool, and is held in place by a collar (10) which has a dia. larger than the opening. The clearance between sleeve and opening can be greater than that between the chuck and its bearing (4).

Description

Dispositif servant à empêcher la pénétration d'eau dans la tête d'un contre-angle dans laquelle est entraînée en rotation la griffe de serrage de l'outil et dont l'extré- mité dirigée vers l'outil est fermée par une paroi pourvue d'un orifice de passage de l'outil. Device for preventing the penetration of water into the head of a 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 a hole for the passage of the tool.

Lorsqu'une fraise taille une cavité dans une dent, le point de travail est arrosé à l'aide d'un brouillard air et eau ou à l'aide d'eau seule. Dans ce cas l'eau est projetée sur des surfaces très irrégulières et elle rebondit dans tous les sens, y compris le long du fût de la fraise, ot elle remonte jusque dans la tête du contre-angle. When a cutter cuts a cavity in a tooth, the working point is watered using an air and water mist or using water alone. In this case the water is sprayed on very irregular surfaces and it bounces in all directions, including along the barrel of the strawberry, ot it goes back into the head of the contra-angle.

On connaît le moyen d'éjecter cette eau en interposant le long de la tige de la fraise une bague fixée, ou simplement tenue par friction. L'eau remontant sur le pourtour de cette bague est éjectée par force centrifuge. We know the way to eject this water by interposing along the stem of the cutter a fixed ring, or simply held by friction. The water rising around the periphery of this ring is ejected by centrifugal force.

Or, le fait d'avoir des fraises comportant cette bague n'est pas généralisé et le fait d'enfiler une bague fendue lorsqu'on introduit la fraise dans le contre-angle est fastidieux et peu commode. La présente invention se propose d'éviter ces inconvénients. However, the fact of having strawberries comprising this ring is not generalized and the fact of threading a split ring when the strawberry is introduced into the contra-angle is tedious and inconvenient. The present invention proposes to avoid these drawbacks.

A cet effet, le dispositif selon l'invention est caractérisé par le fait qu'il comprend un manchon cylindrique alésé au diamètre de l'outil, placé à l1intérieur 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.To this end, the device according to the invention is characterized in that it comprises a cylindrical sleeve bored to the diameter of the tool, placed inside the head, in the axis of the claw, in the space included 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 collar with a diameter greater than the diameter of the orifice.

Ainsi, le manchon arrête l'eau qui aurait tendance à gicler contre la fraise et à pénétrer à l'intérieur de la tête dans l'espace existant entre la fraise et l'orifice dans la paroi d'extrémité, l'eau se trouve éjectée du fait de la rotation du manchon qui est entraîné en rotation par la fraise. Thus, the sleeve stops the water which would tend to squirt against the cutter and to penetrate inside the head in the space existing between the cutter and the orifice in the end wall, the water is found ejected due to the rotation of the sleeve which is rotated by the cutter.

Le dessin annexé représente, à titre d'exemple, plu sieurs formes d'exécution de la présente invention. The accompanying drawing shows, by way of example, several embodiments of the present invention.

La figure 1 est une vue schématique en coupe de l'extrémité d'une tête de contre-angle pourvue du dispositif selon l'invention, sans la fraise. Figure 1 is a schematic sectional view of the end of a contra-angle head provided with the device according to the invention, without the cutter.

La figure 2 est une vue identique à la figure 1 du dispositif appliqué à une autre forme de tête, avec la fraise
On se réfère à la figure 1. La tête de contre-angle comprend un corps de tête 1 dans lequel est formé un alésage. cylindrique 2 recevant la griffe de serrage 3 de l'outil, en particulier une fraise, non représentée. La griffe 3 dans laquelle la fraise est tenue par friction, tourne dans un coussinet 4 lui-même chassé dans le corps de tête 1.Figure 2 is a view identical to Figure 1 of the device applied to another head shape, with the cutter
Referring to Figure 1. The contra-angle head comprises a head body 1 in which is formed a bore. cylindrical 2 receiving the clamping claw 3 of the tool, in particular a milling cutter, not shown. The claw 3 in which the cutter is held by friction, turns in a bearing 4 which is itself driven into the head body 1.

Un bouchon 5 est vissé sur l'extrémité filetée 6 du corps 1 et sa profondeur est telle qu'un espace 7 est ménagé entre le fond de ce bouchon 5 et l'extrémité de la griffe de serrage 3 qui dépasse légèrement de l'extrémité 6 du corps de tête 1.A plug 5 is screwed onto the threaded end 6 of the body 1 and its depth is such that a space 7 is provided between the bottom of this plug 5 and the end of the clamping claw 3 which protrudes slightly from the end 6 of head body 1.

Un manchon 8 alésé au diamètre de la fraise, et fendu, est placé dans l'axe de la griffe et traverse avec un jeu réduit l'orifice 9 ménagé dans le fond du bouchon 5 pour le passage de la fraise. Ce manchon 8 est retenu dans l'espace 7 grâce à une collerette 10 d'un diamètre supérieur au diamètre de l'orifice 9. A sleeve 8 bored to the diameter of the cutter, and split, is placed in the axis of the claw and crosses with a reduced clearance the orifice 9 formed in the bottom of the plug 5 for the passage of the cutter. This sleeve 8 is retained in the space 7 by means of a collar 10 with a diameter greater than the diameter of the orifice 9.

Lorsque la fraise est introduite dans le contre-angle, elle pénètre dans le manchon 8 par force et elle le pousse contre l'extrémité de la griffe 3 ; le talon arrière de la fraise traverse donc ce manchon 8 et vient se loger dans la griffe 3 dans laquelle il tient par friction. Le manchon 8 est donc entraîné en rotation, par friction sur la fraise et comme il a été poussé par la fraise contre la griffe 3, il ne touche pas le bouchon 5. Le jeu entre le manchon 8 et la paroi de l'orifice 9 dans le bouchon 5 est légèrement supérieur au jeu prévu entre la griffe 3 et son coussinet 4. When the cutter is introduced into the contra-angle, it enters the sleeve 8 by force and pushes it against the end of the claw 3; the rear heel of the cutter therefore crosses this sleeve 8 and is housed in the claw 3 in which it holds by friction. The sleeve 8 is therefore driven in rotation, by friction on the cutter and as it was pushed by the cutter against the claw 3, it does not touch the plug 5. The clearance between the sleeve 8 and the wall of the orifice 9 in the plug 5 is slightly greater than the clearance provided between the claw 3 and its bearing 4.

Selon une variante d'exécution de la tête, illustrée figure 2, le corps de tête 11 est formé d'une seule pièce avec le bouchon et le manchon 12 est placé dans le fond du corps de tête 11 avant le montage des autres éléments à savoir la griffe 13 et son coussinet 14 La disposition des pieces est telle que, comme dans- la forme d'exécution précédente un espace 15 est ménagé entre le fond du corps
o de tête 11 et la griffe 13 pour recevoir la collerette 16 du manchon 12. Ainsi que dans la forme d'exécution précé- dente, le manchon 12 traverse avec un jeu réduit l'orifice 17 de passage de la fraise 18 tandis qu'il est alésé au diamètre de la fraise de manière à être retenu sur elle par friction According to an alternative embodiment of the head, illustrated in FIG. 2, the head body 11 is formed in one piece with the plug and the sleeve 12 is placed in the bottom of the head body 11 before the assembly of the other elements to know the claw 13 and its bearing 14 The arrangement of the parts is such that, as in the previous embodiment, a space 15 is provided between the bottom of the body
o of head 11 and claw 13 to receive the flange 16 of the sleeve 12. As in the previous embodiment, the sleeve 12 crosses with a reduced clearance the orifice 17 for passage of the cutter 18 while it is bored to the diameter of the cutter so as to be retained on it by friction

Claims (3)

REVENDICATIONS 1. Dispositif servant à empêcher la pénétration d'eau dans la tête d'un contre-angle 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, caractérisé par le fait qu'il comprend un manchon cylindrique (8,12) alésé au diamètre de l'outil, placé à l'intérieur de la tête (1, 11), dans l'axe de la griffe (3,13) dans l'espace (7,15) compris entre ladite paroi d'extrémité (5) et l'extrémité de la griffe, ce manchon (8,12) traversant avec un jeu réduit ledit orifice (9,17) de passage de l'outil et étant retenu dans ledit espace par une collerette (10,16) d'un diamètre supérieur au diamètre de l'orifice.  1. Device serving to prevent the penetration of water into the head of a 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 a hole for the passage of the tool, characterized in that it comprises a cylindrical sleeve (8,12) bored to the diameter of the tool, placed inside the head (1, 11), in the axis of the claw (3.13) in the space (7.15) between said end wall (5) and the end of the claw, this sleeve (8.12) passing through with reduced play said orifice (9,17) for passage of the tool and being retained in said space by a flange (10,16) with a diameter greater than the diameter of the orifice. 2. Dispositif selon la revendication 1, caractérisé par le fait que le jeu entre ledit manchon (8,12) et l'orifice (9,17) de passage de l'outil est supérieur au jeu entre la griffe (3,13) et son coussinet (4,14). 2. Device according to claim 1, characterized in that the play between said sleeve (8,12) and the orifice (9,17) for passage of the tool is greater than the play between the claw (3,13) and its bearing (4.14). 3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé par le fait que ledit man chon (8,12) est fendu.  3. Device according to any one of the preceding claims, characterized in that said man chon (8,12) is split.
FR8010722A 1980-05-13 1980-05-13 Water exclusion seal for dental handpiece - has sleeve inside right-angled head fitting closely in tool opening Granted FR2482448A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FR8010722A FR2482448A1 (en) 1980-05-13 1980-05-13 Water exclusion seal for dental handpiece - has sleeve inside right-angled head fitting closely in tool opening
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
JP6353581A JPS573631A (en) 1980-05-13 1981-04-28 Water-proofing apparatus of contra.angle head for dentist
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
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.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8010722A FR2482448A1 (en) 1980-05-13 1980-05-13 Water exclusion seal for dental handpiece - has sleeve inside right-angled head fitting closely in tool opening

Publications (2)

Publication Number Publication Date
FR2482448A1 true FR2482448A1 (en) 1981-11-20
FR2482448B1 FR2482448B1 (en) 1983-03-11

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Family Applications (1)

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FR8010722A Granted FR2482448A1 (en) 1980-05-13 1980-05-13 Water exclusion seal for dental handpiece - has sleeve inside right-angled head fitting closely in tool opening

Country Status (2)

Country Link
JP (1) JPS573631A (en)
FR (1) FR2482448A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527473A1 (en) * 1991-08-12 1993-02-17 Nakanishi Dental Mfg. Co. Ltd. Cartridge type dental handpiece

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2030350C (en) * 1989-11-27 1994-08-02 Tetsuo Nakai Hard sintered compact for tools
KR100263594B1 (en) * 1996-10-31 2000-08-01 오카야마 노리오 Hard and tough sintered body
PT2932934T (en) * 2010-01-14 2020-09-03 Bien Air Holding Sa Centrifugal deflection device for a surgical or dental handpiece for evacuating foreign bodies
DE102011075670A1 (en) * 2011-05-11 2012-11-15 Kaltenbach & Voigt Gmbh Dental hand instrument with elongated grip sleeve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701914A (en) * 1951-11-09 1955-02-15 Sodeco Compteurs De Geneve Tool holder, chiefly for dentists' tools
FR2056125A5 (en) * 1969-07-11 1971-05-14 Kaltenbach & Voigt
FR2378498A1 (en) * 1977-01-26 1978-08-25 Micro Mega Sa DENTAL HANDPIECE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701914A (en) * 1951-11-09 1955-02-15 Sodeco Compteurs De Geneve Tool holder, chiefly for dentists' tools
FR2056125A5 (en) * 1969-07-11 1971-05-14 Kaltenbach & Voigt
FR2378498A1 (en) * 1977-01-26 1978-08-25 Micro Mega Sa DENTAL HANDPIECE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0527473A1 (en) * 1991-08-12 1993-02-17 Nakanishi Dental Mfg. Co. Ltd. Cartridge type dental handpiece

Also Published As

Publication number Publication date
FR2482448B1 (en) 1983-03-11
JPS573631A (en) 1982-01-09

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