US3909946A - Dental handpiece - Google Patents

Dental handpiece Download PDF

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Publication number
US3909946A
US3909946A US303126A US30312672A US3909946A US 3909946 A US3909946 A US 3909946A US 303126 A US303126 A US 303126A US 30312672 A US30312672 A US 30312672A US 3909946 A US3909946 A US 3909946A
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US
United States
Prior art keywords
slot
body portion
axial bore
shaft
notch
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.)
Expired - Lifetime
Application number
US303126A
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English (en)
Inventor
Yoshiaki Watanabe
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.)
J Morita Manufaturing Corp
Original Assignee
J Morita Manufaturing Corp
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 J Morita Manufaturing Corp filed Critical J Morita Manufaturing Corp
Application granted granted Critical
Publication of US3909946A publication Critical patent/US3909946A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions

Definitions

  • the body portion has an axial bore with an axial slot in the inner surface thereof and a lateral recess in the slot, and the forward end portion has a shaft with an engaging pin thereon.
  • the shaft is inserted into the axial bore with the pin sliding in the slot, and the shaft is turned to engage the pin in the recess for secure connection of the two portions of the handpiece.
  • This invention relates to a dental handpiece and more particuraly to a mechanism for connecting the forward end portion of a dentalhandpiece to the body portion thereof.
  • the dental handpiece comprises a body portion enclosing therein a micromotor or a turbine rotor and a forward end portion detachably attached to the body portion and having a tool at the fore end thereof.
  • various types of forward portions are alternatively attached to the common body portion of the handpiece. It is necessary in view of efficiency and safety in treatment that the forward end portion of the handpiece should remain firmly attached to the body portion and not fall off inadvertently therefrom while in use for treatment.
  • the forward end portion is connected to the body portion by frictional contact.
  • a way of connection cannot ensure 100 firmness in connection.
  • a screw may be used to clamp the forward portion of the dental instrument to the body portion thereof.
  • FIG. 1 is a perspective view of the handpiece of the invention, with the forward end portion thereof being disconnected from the body portion thereof;
  • FIG. 2 is an enlarged perspective view in longitudinal section, of the forward end of the body portion
  • FIGS. 3a, 3b and 3c are schematic views illustrating the operation of the connecting mechanism of the invention.
  • FIG. 1 a dental handpiece comprising a body portion 1 and a forward end portion 2 detachably attached to the body portion in the manner to be described later in detail.
  • the body portion 1 encloses a micromotor, not shown, which rotates a tool 3 detachably attached to the tip of the forward end portion 2 when the two portions 1 and 2 are connected.
  • the power transmission between the motor and the tool is so well-known that it is neither shown nor requires further explanation.
  • the body portion 1 is provided at its forward end with an axial bore 11 adapted to receive the rear end of the forward end portion 2 of the handpiece in the manner to be described later.
  • the bore 11 is provided in its inner surface with an axial slot 12 which a slide key 13 engages.
  • the key is rigidly connected by means of a pin 15 to a slide member 14 provided on the outer surface of the body portion 1. By sliding the member 14 from outside the handpiece it is possible to move the key 13 along the slot 12 inside the instrument body 1.
  • a spring 16 normally urges the member 14 and consequently the key 13 toward the forward end of the body 1.
  • the slot 12 is provided at a predetermined lonconnecting shaft 21 adapted to be inserted into the bore 11 of the body portion 1 for connection of the two portions 1 and 2.
  • the shaft 21 has an outer diameter a little smaller than the inner diameter of the bore 11, so that the shaft can be rotated inside the bore 11.
  • the shaft 21 is provided on the outer surface thereof with a small engaging pin 22 having a diameter a little v smaller than the width of the slot 12 and the recess 17, so that the pin 22 can freely move in the slot 12 and the recess 17.
  • the length of the recess 17 in the circumferential direction of the bore 11 is much the same as the diameter of the pin 22.
  • the slide key 13 is urged forwardly by the spring 16 to close the recess 17 as previously mentioned with reference to FIG. 3a.
  • the shaft 21 of the former portion 2 is inserted into the bore 11 of the latter portion 1, with the pin 2-2 engaging in the slot 12.
  • the pin 22 hits against the slide key13 in the slot 12 and pushes the key 13 against the resiliency of the spring 16 further inwardly in the slot as far as the key 13 is stopped by the inner end of the slot 12, where the key 1.3 opens the recess 17 as shown in FIG. 3b.
  • the length of the slide key 13 is the same as the distance between the inner end of the slot 12 and the inner side edge of the recess 17. Under the condition that the key 13 opens the recess, the forward end portion 2 of the handpiece and consequently the shaft'21 is turned in the direction as indicated by arrows in FIG. 3b, so that the pin 22 engages in the recess 17, whereupon the pin 22 no longer exists in the slot 12 so that the key 13 is pushed by thespring 16 back to 40 the original position as shown in FIG. 3c. Now the portions 1 and 2 of the handpiece have been connected,
  • the slide member 14 In order to disconnect the foward end portion 2 from the body portion 1, the slide member 14 is simply moved toward the rear end of the body against the force of the spring 16 so as to remove the key 13 from in front of the recess 17 and then. the forward end portion 2 is simply turned to disenga'ge the pin 22 from the recess 17 and then axially pulled out of the body portion 1.
  • a simple action suffices to connect the two portions of the handpiece, that is, to simply insert the forward end portion into the body portion and turn the two portions relative to each other.
  • the two portions Under the connected condition, unless the slide member 14 is moved, the two portions are never separated, and in view of the position of the slide member 14 there is no likelihood that the dentist handling the handpiece inadvertently touches the slide member 14 to effect separation of the two portions. Disconnection of the two portions when necessary can be effected as simply and easily as the connecting operation.
  • a dental handpiece comprising: a body portion and a forward end portion detachably connected to said body portion; said body portion being provided with an axial bore which opens at the forward end of said body portion, an axial slot formed in the inner surface of said bore, a lateral recess formed in said slot and a slide key in said slot normally urged to a position to close said recess, said slide key being normally urged by a spring to said recess closing position and being movable vout of said position against the force of spring to a recess opening position; and said forward end portion having means for supporting a rotary dental tool and a shaft removably inserted into said axial bore of said body portion and being provided with a pin slidably engageable in said slot in said axial bore when said shaft is inserted into said axial bore so that said pin pushes said key out of said recess closing position and, upon relative rotation of said forward end portion to said body portion, engages in said recess, whereupon said key is restored to said
  • the handpiece of claim 1 further including a.slide member provided on the outside of said body portion and connected to said slide key, so that when saidslide member is moved, said slide key is moved out of said recess closing position.
  • a dental handpiece comprising: a body portion having an axially centered bore at the forward end thereof; detachable dental tool supporting means including rearwardly extending shaft means on the rear end thereof insertable into the axial bore, and means for receiving a dental tool on the forward end thereof; transverse extension means projecting transversely outwardly from the side of the shaft means; means defining a slot extending lengthwise along the interior of the axial bore; means defining a notch in communication with the slot, the transverse extension means being guided by the slot into the notch during insertion of the shaft means into the axial bore; and means for preventing escape of the transverse extension means from the notch once the shaft means are inserted into the axial bore so as to restrain the dental tool supporting means against rotative and axial movement relative to the body portion, wherein the escape prevention means includes a reciprocative member mounted for sliding movement along the lengthwise slot between a locking position blocking passage of the transverse extension means between the lengthwise slot and the notch and a release position permitting passage of the transverse
  • the lengthwise slot has a width representing the width of the shaft transverse extension means
  • the notch is disposed intermediate the ends of the lengthwise slot transversely to the length thereof, the depth and width of the notch representing, respectively, the length and width of the shaft transverse extension means.
  • the reciprocative member comprises a slide key mounted for sliding movement inside the lengthwise slot.
  • the lengthwise slot includes an extension portion to the rear of the notch, the slide key in the release position thereof being slidably mounted inside the rearward slot extension.
  • the dental handpiece according to claim 4 including means for displaceably positioning the escape prevention means for engagement with the transverse extension means, the escape prevention means being temporarily displaceable by the transverse extension means so as to permit entry of the transverse extension means from the lengthwise slot into the notch during insertion of the shaft means into the axial bore.
  • the dental handpiece according to claim 4 including an operator member slidably mounted on the outer surface of the body portion, and means forinterconnecting the operator member with the reciprocative member whereby the reciprocative member is moved conjointly with the operator member.

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)
US303126A 1971-11-09 1972-11-02 Dental handpiece Expired - Lifetime US3909946A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971104808U JPS507756Y2 (de) 1971-11-09 1971-11-09

Publications (1)

Publication Number Publication Date
US3909946A true US3909946A (en) 1975-10-07

Family

ID=14390706

Family Applications (1)

Application Number Title Priority Date Filing Date
US303126A Expired - Lifetime US3909946A (en) 1971-11-09 1972-11-02 Dental handpiece

Country Status (3)

Country Link
US (1) US3909946A (de)
JP (1) JPS507756Y2 (de)
DE (1) DE2253904C3 (de)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071029A (en) * 1976-05-21 1978-01-31 Stryker Corporation Angle handpiece
FR2402443A1 (fr) * 1977-09-13 1979-04-06 Kaltenbach & Voigt Piece a main de dentisterie
US4211009A (en) * 1977-02-03 1980-07-08 Micro-Mega S.A. Dental handpiece
US4234308A (en) * 1977-06-07 1980-11-18 Micro-Mega S.A. Device for locking a tool in a dental handpiece
US4251212A (en) * 1978-12-22 1981-02-17 Siemens Aktiengesellschaft Dental handpiece
US4255143A (en) * 1978-12-22 1981-03-10 Siemens Aktiengesellschaft Device for releasably connecting two parts of a dental handpiece together
FR2465467A1 (fr) * 1979-09-19 1981-03-27 Kaltenbach & Voigt Piece a main de dentisterie
US4310310A (en) * 1980-09-08 1982-01-12 Young Dental Mfg. Co. Locking assembly for dental handpiece
FR2560765A1 (fr) * 1984-03-08 1985-09-13 Micro Mega Sa Systeme d'accrochage automatique de la tete d'un contre-angle sur son corps
US5921777A (en) * 1995-12-05 1999-07-13 Healthpoint, Ltd. Dental and surgical handpiece with disposable cartridge
US6398551B1 (en) * 1999-09-27 2002-06-04 W & H Dentalwerk Bürmoos GmbH Angle piece for dental or surgical use
US20040014000A1 (en) * 2002-07-02 2004-01-22 Kuhn Bernhard Medical or dental-medical handpiece having a rearward and a forward handpiece section
US20090118737A1 (en) * 2006-08-07 2009-05-07 Micro Mega International Manufactures (Societe Anonyme) Counter angle for implantology or surgery comprising removable sub-assemblies and in particular an intermediate positioning support for the head cartridge
KR101089276B1 (ko) 2010-05-10 2011-12-02 주식회사 제일메디칼코퍼레이션 핸드피스
US20120156643A1 (en) * 2005-07-26 2012-06-21 Angstrom Manufacturing, Inc. Prophy angle and adapter
EP2522296A1 (de) * 2011-05-13 2012-11-14 Nakanishi Inc. Dentales Handstück
US20200397113A1 (en) * 2019-06-24 2020-12-24 Helen Of Troy Limited Beauty tool head locking mechanism

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245151A (en) * 1939-06-08 1941-06-10 P A Geier Co Tubular coupling for suction cleaners and the like
US2267802A (en) * 1940-11-09 1941-12-30 George W Purdy Coupling
US2527256A (en) * 1947-11-07 1950-10-24 Earle R Jackson Connector for brushes, brooms, and the like
US2755107A (en) * 1952-12-18 1956-07-17 Air Way Ind Inc Internally flush latch for vacuum cleaner pipes
US3665606A (en) * 1969-01-27 1972-05-30 Kaltenbach & Voigt Coupling for the connection of a dental handpiece to a power source

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245151A (en) * 1939-06-08 1941-06-10 P A Geier Co Tubular coupling for suction cleaners and the like
US2267802A (en) * 1940-11-09 1941-12-30 George W Purdy Coupling
US2527256A (en) * 1947-11-07 1950-10-24 Earle R Jackson Connector for brushes, brooms, and the like
US2755107A (en) * 1952-12-18 1956-07-17 Air Way Ind Inc Internally flush latch for vacuum cleaner pipes
US3665606A (en) * 1969-01-27 1972-05-30 Kaltenbach & Voigt Coupling for the connection of a dental handpiece to a power source

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071029A (en) * 1976-05-21 1978-01-31 Stryker Corporation Angle handpiece
US4211009A (en) * 1977-02-03 1980-07-08 Micro-Mega S.A. Dental handpiece
US4234308A (en) * 1977-06-07 1980-11-18 Micro-Mega S.A. Device for locking a tool in a dental handpiece
FR2402443A1 (fr) * 1977-09-13 1979-04-06 Kaltenbach & Voigt Piece a main de dentisterie
US4251212A (en) * 1978-12-22 1981-02-17 Siemens Aktiengesellschaft Dental handpiece
US4255143A (en) * 1978-12-22 1981-03-10 Siemens Aktiengesellschaft Device for releasably connecting two parts of a dental handpiece together
FR2465467A1 (fr) * 1979-09-19 1981-03-27 Kaltenbach & Voigt Piece a main de dentisterie
US4310310A (en) * 1980-09-08 1982-01-12 Young Dental Mfg. Co. Locking assembly for dental handpiece
FR2560765A1 (fr) * 1984-03-08 1985-09-13 Micro Mega Sa Systeme d'accrochage automatique de la tete d'un contre-angle sur son corps
US5921777A (en) * 1995-12-05 1999-07-13 Healthpoint, Ltd. Dental and surgical handpiece with disposable cartridge
US6398551B1 (en) * 1999-09-27 2002-06-04 W & H Dentalwerk Bürmoos GmbH Angle piece for dental or surgical use
US20040014000A1 (en) * 2002-07-02 2004-01-22 Kuhn Bernhard Medical or dental-medical handpiece having a rearward and a forward handpiece section
US7179087B2 (en) * 2002-07-02 2007-02-20 Kaltenbach & Voigt Gmbh & Co. Kg Medical or dental-medical handpiece having a rearward and a forward handpiece section
US20120156643A1 (en) * 2005-07-26 2012-06-21 Angstrom Manufacturing, Inc. Prophy angle and adapter
US8597022B2 (en) * 2005-07-26 2013-12-03 Angstrom Manufacturing, Inc. Prophy angle and adapter
US20090118737A1 (en) * 2006-08-07 2009-05-07 Micro Mega International Manufactures (Societe Anonyme) Counter angle for implantology or surgery comprising removable sub-assemblies and in particular an intermediate positioning support for the head cartridge
KR101089276B1 (ko) 2010-05-10 2011-12-02 주식회사 제일메디칼코퍼레이션 핸드피스
EP2522296A1 (de) * 2011-05-13 2012-11-14 Nakanishi Inc. Dentales Handstück
US20120288823A1 (en) * 2011-05-13 2012-11-15 Takao Kimura Dental handpiece
US9289271B2 (en) * 2011-05-13 2016-03-22 Nakanishi Inc. Dental handpiece
US20200397113A1 (en) * 2019-06-24 2020-12-24 Helen Of Troy Limited Beauty tool head locking mechanism
EP3986201A4 (de) * 2019-06-24 2023-01-25 Helen of Troy Limited Kopfverriegelungsmechanismus für schönheitswerkzeug

Also Published As

Publication number Publication date
DE2253904A1 (de) 1973-05-24
DE2253904B2 (de) 1977-07-14
JPS507756Y2 (de) 1975-03-07
DE2253904C3 (de) 1978-03-02
JPS4860399U (de) 1973-08-01

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