EP1009320A1 - Outil manuel de dentisterie reducteur de vitesse - Google Patents

Outil manuel de dentisterie reducteur de vitesse

Info

Publication number
EP1009320A1
EP1009320A1 EP98915339A EP98915339A EP1009320A1 EP 1009320 A1 EP1009320 A1 EP 1009320A1 EP 98915339 A EP98915339 A EP 98915339A EP 98915339 A EP98915339 A EP 98915339A EP 1009320 A1 EP1009320 A1 EP 1009320A1
Authority
EP
European Patent Office
Prior art keywords
hand piece
drive
dental hand
housing
gear
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Withdrawn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
EP98915339A
Other languages
German (de)
English (en)
Inventor
José L. MENDOZA
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.)
Denticator International Inc
Original Assignee
Denticator International Inc
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 Denticator International Inc filed Critical Denticator International Inc
Publication of EP1009320A1 publication Critical patent/EP1009320A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/005—Devices for dental prophylaxis

Definitions

  • the following invention relates generally to instrumentalities used in the dental environment. More specifically, the instant invention is directed to a hand piece which reduces a high speed air motor which typically runs up to 500,000 rpm to a low speed hand piece, whose operating speed is in the order of 5,000 to 20,000 rpm for use in low speed dental operations, such as when polishing teeth.
  • the instant invention addresses these problems by providing a device which is tailored for the specific purpose and for a single use. In this way, maximum hygiene will have been afforded and the safety of the patient will receive paramount import.
  • the air turbine on a dental drill has a drive speed well above that which is needed for the prophylaxis that normally occurs when one goes to a dentist for teeth cleaning. In fact high speed cleaning is contraindicated.
  • the instant invention resolves this problem by providing a housing in which a drive shaft is coupled to the high speed output of the air motor.
  • the drive shaft includes a drive gear which is surrounded by idler gears which in turn rotates a driven gear with sufficient speed reduction so that a shaft driven by the driven gear communicates with an output gear at a desired slow speed for dental prophylaxis.
  • a further object of the present invention is to provide a device as characterized above which avoids the problems of contamination from one patient to the next by being economically formed to allow disposal after a single use.
  • a further object of the present invention is to provide a device as characterized above which is durable in construction, safe to use and lends itself to the economies of mass production.
  • a further object of the present invention is to provide a device as characterized above which reliably drives an output at a constant, slow speed.
  • a speed reducing dental hand piece comprising, in combination: a housing having an input end and an output end, a drive shaft including a coupling means at one end and a drive gear at another end, the drive shaft coupling means located at the input end of the housing and the drive shaft extending into the housing, a driven gear operatively coupled to the drive gear in the housing and having an output means, the driven gear having more teeth than the drive gear whereby the drive gear and driven gear cooperate to reduce rotational speed of the output means compared to the coupling means.
  • Figure 1 is a perspective view of the apparatus according to the present invention.
  • Figure 2 is a sectional view taken along lines 2-2 of figure 1.
  • Figure 2A is a detail of figure 2.
  • Figure 3 is a sectional view taken along lines 3-3 of figure 2.
  • Figure 4 is an exploded parts perspective of the apparatus according to the present invention.
  • Figures 5A, 5B and 5C reflect alternative prophy devices.
  • reference numeral 10 is directed to the disposable speed reducing hand piece for dental prophylaxis according to the present invention.
  • the hand piece 10 (shown in figure 4) includes a housing 20, a tail piece 40 at an end of the housing remote from a prophylaxis cup drive 80, a drive shaft 50 nested within the housing and oriented adjacent the tail piece 40, the drive shaft 50 having a slotted drive head 54 for receiving input from a high speed dental motor and a drive gear 56 associated therewith.
  • a plurality of idler gears 68 circumscribe the drive gear 56 and are fixed into position on posts 64 contained within a cup 62 which has an interior back wall 63 and an interior side wall defines a driven gear 66 in communication with the idler gears 68.
  • the driven gear 66 moves a driven shaft 70 and thence to an output gear 76 that couples with a short gear 82 in communication with the prophy cup drive 80.
  • the speed reducing hand piece 10 (figures 1 and 4) details a housing 20 which includes a central cylindrical portion 22 having a plurality of longitudinally extending ribs 24 disposed around the outer periphery of the cylindrical section 22.
  • This central section communicates with an input end on the left-hand side characterized in a second cylindrical section 34 having a cross- sectional area greater than the central section 22 with an area of transition therebetween including an integral conical transition 32.
  • An end 26 opposite the input end 34 defines an output end 26.
  • the output end 26 is of a lesser cross- sectional area, but is also cylindrically shaped and includes a necked-down portion 27 at an area of transition between the central section 22 and the output end 26.
  • the output end 26 further communicates with an orthogonally offset terminus 28 having a central bore 30 disposed with a central axis transverse to the long axis of the housing's main body.
  • the tail piece 40 completes the housing 20.
  • the tail piece has a central section 42 of substantially the same cylindrical diameter as the input end 34, and the tail piece 40 is fixed to the housing main body 20 by means of a stepped down sleeve 44 which frictionally resides within an interior bore 36 of the input end 34.
  • the friction fit may be enhanced by an annular groove 35 disposed on the interior bore 36.
  • the groove 35 receives projections 37 located on sleeve 44.
  • Front face 37a of the projection is curved to ease locking in the tail piece 40.
  • Rear face 37b is vertical and flat.
  • the projection 37 defines a one-way barb which resists removal.
  • Bore 36 may also receive a trackway 31 to align with a key 29 formed on sleeve 44 which assists with alignment.
  • An outwardly diverging (with respect to the major housing 20) section 46 completes the tail piece 40 and constitutes a truncated cone having a greater cross- sectional opening area remote from the housing 20 than closer.
  • This tail piece 40 mates with a source of power. Prior to installing the tail piece 40 on the housing 20, however, drive elements are first placed within the housing.
  • the driven gear assembly includes a driven shaft 70 having at the output end, that is, an output gear 76 fortified by a cylindrical support 74.
  • the shaft 70 is thinner than the support 74 and includes a disc 72 integrally formed on the shaft 70 to minimize shaft flexing because the disc 72 fits with close tolerance into the interior bore 21 of the housing 20.
  • the driven shaft 70 then extends to the input end (rearwardly) to form a driven gear cup 62 defined as a blind bore with an open end facing the input end of the housing.
  • An interior side wall of the blind bore is provided with a plurality of gear teeth 66.
  • the interior back wall 63 (figure 2) of the gear cup 62 supports a plurality of idler gear support posts 64.
  • a plurality of idler gears 68 are supported on these posts 64 and are in meshing engagement with the interior teeth 66 of the gear cup 62.
  • three idler gears 68 are included as shown in figure 3 spaced from a central point of the gear cup at about 120° intervals.
  • the idler gears 68 are of a substantially lesser dimension than the available interior bore space to provide a central clearance for a drive gear 56 placed centrally with respect to the three idler gears 68 of the gear cup 62.
  • the drive gear 56 drives the idler gears 68 which thereafter rotate the drive cup 62 via teeth 66.
  • the drive gear 56 is integrally formed on a drive shaft 52 having a slotted head 54 at one end for receiving input from a source.
  • the area between the drive shaft 52 and the drive gear 56 includes a locating disc 58 fixed on the drive shaft 52. In conjunction with groove 35 and projections 37, this allows the drive shaft assembly 50 to be fixed and located within the housing by virtue of the tail piece 40 and its necked-down portion 44 abutting against one face of the disc 58 assuring that the drive shaft neither wanders axially nor flexes.
  • the drive gear 56 has substantially fewer teeth than the drive cup teeth 66, one rotation of the drive gear 56 results only in a partial rotation of the drive cup. This reduces the speed appreciably and allows the device to be used in dental applications that benefit from a slower rotation.
  • a polishing compound can be applied to a prophy cup fitted on drive 80 which is driven by the short gear 82 that is fitted into the housing 20 by first placing the short gear 82 into the bore 30 of the offset terminus 28 and then allowing the output gear 76 to mesh with gear 82.
  • Figures 5 A, 5B and 5C show variations of the prophy cup drive: a friction fit, a screw thread and a latch coupling, respectively.

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

Cette invention concerne un outil prophylactique jetable utilisé en dentisterie, lequel comprend un mécanisme réducteur à engrenages (60) qui est disposé dans un boîtier (20) et fait partie intégrante de celui-ci. Ce système permet d'utiliser une force de forage d'une grande puissance afin d'entraîner l'outil lentement et de manière fiable grâce aux engrenages réducteurs. La coupelle prophylactique jetable, qui est fabriquée à partir de plastiques peu onéreux, se prête à la production et à l'assemblage à grande échelle, ce qui la rend économique et permet de la jeter après une seule utilisation de manière à encourager l'hygiène.
EP98915339A 1997-04-14 1998-04-14 Outil manuel de dentisterie reducteur de vitesse Withdrawn EP1009320A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US83464097A 1997-04-14 1997-04-14
US834640 1997-04-14
PCT/US1998/006875 WO1998046160A1 (fr) 1997-04-14 1998-04-14 Outil manuel de dentisterie reducteur de vitesse

Publications (1)

Publication Number Publication Date
EP1009320A1 true EP1009320A1 (fr) 2000-06-21

Family

ID=25267430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98915339A Withdrawn EP1009320A1 (fr) 1997-04-14 1998-04-14 Outil manuel de dentisterie reducteur de vitesse

Country Status (3)

Country Link
EP (1) EP1009320A1 (fr)
AU (1) AU6954798A (fr)
WO (1) WO1998046160A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US263814A (en) 1882-09-05 Theodoee h
US969378A (en) 1905-03-20 1910-09-06 Charles C Ladd Liquid-motor.
US1343115A (en) 1918-11-01 1920-06-08 George E Current Rotary engine
US1601397A (en) 1924-07-15 1926-09-28 Sirius E Kochendarfer Packing for rotary-engine pistons
US2017881A (en) 1932-07-05 1935-10-22 Adolph D Wiseman Dental tool
US1999488A (en) 1933-04-11 1935-04-30 Max E Swisher Dental contraangle hand piece
US2033662A (en) 1933-07-31 1936-03-10 Degussa Holder for dental instruments
US2025779A (en) 1934-02-16 1935-12-31 Gustav A Roelke Dental tool
FR2383361A1 (fr) * 1977-03-10 1978-10-06 Micro Mega Sa Dispositif de reduction de vitesse pour piece a main dentaire
US4490114A (en) * 1980-01-21 1984-12-25 Cooper Lasersonics, Inc. Ultrasonically driven low-speed rotary motor
US5020994A (en) * 1990-02-09 1991-06-04 Huang Jerry T Dental prophylaxis angle
US5219285A (en) * 1990-03-30 1993-06-15 Mti Precision Products, Inc. Disposable right angle dental handpiece
US5498159A (en) * 1994-07-29 1996-03-12 Micro Motors, Inc. Dental tool coupling for disposable tooth polisher
US5569034B1 (en) * 1995-01-04 1999-06-15 Mti Precision Prod Inc Dental handpiece providing low speed high torque rotary output using plural stage planetary gear reduction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9846160A1 *

Also Published As

Publication number Publication date
AU6954798A (en) 1998-11-11
WO1998046160A1 (fr) 1998-10-22

Similar Documents

Publication Publication Date Title
US6102700A (en) Cleansing implement and electrically powered dental cleansing device
US5503555A (en) Dental prophylaxis angle
EP3485840B1 (fr) Angle de prophylaxie jetable amélioré
JP3143017B2 (ja) ハンドピース並びにこれに使用される工具
US9017073B2 (en) Disposable prophylaxis angle with improved gear retainer
US5267860A (en) Dental hygiene tool with shield and germicidal seals
US5924865A (en) Chuck with a push button release for a dental/medical device
CA2109016A1 (fr) Piece a main dentaire et systeme de commande de fraise
US5496218A (en) Coupling means for the drive shaft of prophy angles
EP2529693A2 (fr) Pièce à main dentaire
US7255559B2 (en) Disposable dental prophy angle with secure retention mechanism
EP3524188A3 (fr) Dispositif électrique de résection de tissus
US5131846A (en) Prophy cup shield
KR19990028995A (ko) 해제 푸시 버튼을 갖는 치과/의료용 장치를 위한 척
CA2302740A1 (fr) Instrument dentaire a main a palier a deplacement axial
JP7542602B2 (ja) 歯内ヤスリ用ハンドピースアダプタ
US5498159A (en) Dental tool coupling for disposable tooth polisher
US5480124A (en) Vacuum tubing valve
US20100035205A1 (en) Non-90-Degree Ergonomically-Shaped Dental Prophylaxis Angle with a Straight Driving Shaft
WO1998046160A1 (fr) Outil manuel de dentisterie reducteur de vitesse
EP1078606A3 (fr) Contre-angle dentaire
EP0039202A1 (fr) Dispositif de fixation dentaire
JP3049401B2 (ja) 歯の電動クレンジング装置
ATE267560T1 (de) Medizinisches oder dentalmedizinisches handstück und ein werkzeug für das handstück
EP1459696B1 (fr) Pièce à main à contre-angle pour prophylaxie dentaire

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

17P Request for examination filed

Effective date: 19991109

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE DK GB LI SE

18W Application withdrawn

Withdrawal date: 20000517