US3877574A - High speed turbines - Google Patents

High speed turbines Download PDF

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Publication number
US3877574A
US3877574A US340472A US34047273A US3877574A US 3877574 A US3877574 A US 3877574A US 340472 A US340472 A US 340472A US 34047273 A US34047273 A US 34047273A US 3877574 A US3877574 A US 3877574A
Authority
US
United States
Prior art keywords
container
cap
rotor
housing
turbine
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
US340472A
Other languages
English (en)
Inventor
Herbert Percy Killick
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.)
DENTAL Manufacturing ENG
DENTAL MANUFACTURING ENGINEERING Ltd
Original Assignee
DENTAL Manufacturing ENG
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 DENTAL Manufacturing ENG filed Critical DENTAL Manufacturing ENG
Application granted granted Critical
Publication of US3877574A publication Critical patent/US3877574A/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
    • A61C1/02—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53909—Means comprising hand manipulatable tool

Definitions

  • ABSTRACT A rotor and bearing replacement pack or kit for a miniature high speed turbine, such as a dental handpiece, which includes a container holding a replacement rotor/bearing assembly oriented within the container in a predetermined position. One end of the container is closed by a closure cap threadedly received on the container. The cap-engaging threads on the container are matched to the threads which retain a housing cap in position upon the housing of the miniature high speed turbine. When the turbine housing cap is removed, and the closure cap is removed from the container, the container may be threaded into position upon the turbine housing in place of the housing cap.
  • the replacement rotor-bearing assembly contained within the container is so oriented as to be in operative alignment with its final end position within the turbine housing when the container is thus threaded on the cap.
  • a plunger operable from the opposite end of the container may then be employed to slide the replacement assembly into position within the turbine housing.
  • the plunger is preferably tapered and can be employed to assist in removing certain parts of the rotor/bearing assembly to be replaced from the turbine housing.
  • This invention relates to high speed turbines of the kind comprising a rotor having a stub shaft projecting axially from each side the rotor journalled in respective bearings the bearings being in turn supported within a turbine housing by resilient O-rings.
  • rotor is of course meant the pressure air responsive member by which rotary drive is established;
  • O- rings means a generally circular supporting/sealing ring, not a ring of material which is itself necessarily of circular cross-section.
  • High speed turbines of the kind referred to, in a form small enough to be readily portable are commonly found inter alia in dental handpieces. They constitute pieces of mechanism of extremely high engineering precision and, in the past, if any of the recited parts thereof have required replacement, the entire turbine has had to be sent back to the factory or to a service centre. This has represented a source of considerable inconvenience.
  • the miniature turbine has incorporated the rotor with its bearings supported within a housing affording at one end access to the rotor stub shaft as a drive source and at the other end, from which the rotor and bearings will be withdrawn for service, being closed by a removably threaded closure member hereinafter referred to for convenience as a cap.
  • a cap removably threaded closure member
  • the invention consists in a rotor and bearing replacement pack for a miniature high speed turbine of the kind referred to, comprising a replacement rotor/bearing assembly orientated correctly within a container for insertion into the turbine housing.
  • the container includes a cylindrical sleeve of plastics material or of metal dimensioned to hold the replacement rotor/bearing assembly snugly and to be threadably secured to the turbine housing in place of the housing cap to permit the rotor and bearings to be slid from the container into the housing as a unit by a plunger associated with the sleeve.
  • the container of plastics material comprises a cylindrical portion closed at one end by a removable closure such as a cap and having a central opening at its other end of reduced diameter through which protrudes the stem of a plunger located behind the rotor/bearings assembly so that, when the aforesaid closure is removed, the assembly can be expelled from the plastic container pushing on the plunger stem.
  • the plunger stem is tapered and is of dimensions such that it can be inserted into the miniature turbine tobe repaired, after removal of the rotor and one bearing,to become wedged within the remaining bearing thereby serving to extract the latter.
  • an air-bearing turbine to be repaired first of all has its housing cap removed. Then, by pressing on a burr or other implement fitted in the rotor stub shaft, the rotor and the bearing which it carries at the cap end of the assembly can be expelled through the opening provided by the removal of the housing cap. This normally leaves the bearing at the implement-mounting end of the rotor yet to be removed; the tapered stem of the new rotor/bearing assembly container described above with its closure cap in place is then inserted from the cap end of the housing to jam into the remaining bearing which then can be withdrawn frictionally held on the stem.
  • the closure member of the new rotor/bearing assembly container is removed and the container threaded onto the turbine housing in place of the turbine housing cap.
  • Pressure on the plunger stem causes the rotor/bearing assembly, now automatically aligned with its intended housing, to be expelled in position by pressure on the plunger stem. It then remains merely to replace the turbine housing cap.
  • the cylindrical sleeve in which the new rotor/bearing assembly is provided may be threaded to engage with the turbine housing, or may be made as an interference fit with the turbine housing thread, in the case of a threaded housing, for fitting in position.
  • a tough resilient plastics material such as high density polyethylene or polypropylene is preferred for the new rotor/bearing assembly container.
  • FIG. 1 illustrates the head of a turbine dental handpiece having the turbine housing cap unscrewed by a suitable tool
  • FIG. 2 shows a container for a replacement rotor/- bearing assembly being used as a tool.to extract the inner bearing to be replaced;
  • FIG. 3 shows the closure being unscrewed from the container
  • FIG. 4 shows the container screwed on to the turbine housing in place of the turbine cap preparatory to expulsion of the new rotor/bearing assembly from the container into the turbine housing
  • FIG. 5 is a cross-sectional view through a turbine housing with the housing cap removed; alone FIG. 6 is a view similar to FIG. 5 with the rotor and upper bearing removed; and
  • FIG. 7 is a cross-sectional view similar to FIG. 5 showing the present invention during the installation of a replacement rotor/bearing assembly.
  • a sprung circular clamp l is used smoothly to clampingly engage and unscrew the housing cap 2 of a miniature turbine housing 3 constituting the head of a dental handpiece 4 (only part of which is shown).
  • a dental burr 5 previously or now inserted into the handpiece head, is used to push the rotor R and outer bearing UB (see FIG. 5) out of the turbine housing 3.
  • the tapered stem 6 of a replacement rotor/bearing assembly container 7 (FIG. 2) is pushed into the open end of the turbine housing to jam on to the inner rotor bearings 8 (which usually remains in the housing when the rotor and outer bearing are pushed out by the burr) and bearing 8 is then withdrawn by pulling on the container 7.
  • a closure cap 9 (FIG. 3) is unscrewed from the container, which is then (FIG. 4) screwed on to the turbine housing 3 in place of the cap 2.
  • a cylindrical portion 10 of the container houses a replacement rotor/- bearing assembly (see FIG. 7) and a head portion P of a plunger on the stem 6, located within the cylindrical portion 10 of the container, pushes the replacement rotor/bearing assembly designated generally smoothly from the container into the emptied turbine housing 3 by pressure on the stem 6 (FIG. 6).
  • all that remains is to unscrew the container 7 and screw back the turbine housing cap 2, tightening it with the clamp 1.
  • the bearing at the implement-mounting end is expelled along with the rotor and the other bearing by pressure on the burr so in this case the tapered stem does not have to be used as an extractor tool.
  • a rotor/bearing assembly replacement pack for a miniature high speed turbine of the type comprising a turbine housing having an internal chamber closed at one end by a threaded housing cap and a rotor/bearing assembly operatively mounted in said chamber; said pack comprising a container threaded at one end in correspondence with said threaded housing cap, a plunger slidably mounted in the opposite end of said container, a container cap closing said one end of said container, and a replacement rotor/bearing assembly mounted in said housing in correct orientation to be expelled from said container into operative position in a turbine housing chamber by depression of said plunger when said container cap is removed and said container is threaded onto the turbine housing in place of its housing cap.
  • said plunger includes a portion projecting axially from said container, said portion being axially tapered for insertion into a bearing.

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)
US340472A 1972-04-04 1973-03-12 High speed turbines Expired - Lifetime US3877574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1553172A GB1367733A (en) 1972-04-04 1972-04-04 High speed turbines

Publications (1)

Publication Number Publication Date
US3877574A true US3877574A (en) 1975-04-15

Family

ID=10060781

Family Applications (1)

Application Number Title Priority Date Filing Date
US340472A Expired - Lifetime US3877574A (en) 1972-04-04 1973-03-12 High speed turbines

Country Status (8)

Country Link
US (1) US3877574A (ja)
JP (2) JPS4915286A (ja)
CH (1) CH560315A5 (ja)
DE (1) DE2313060B2 (ja)
FR (1) FR2178918B1 (ja)
GB (1) GB1367733A (ja)
IT (1) IT984746B (ja)
SE (1) SE392033B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5374189A (en) * 1992-09-09 1994-12-20 Denticator International, Inc. Integrally formed disposable prophy angle and drive mechanism therefor
US5405265A (en) * 1993-07-30 1995-04-11 Denticator International, Inc. Dental prophylaxis cup
US5667383A (en) * 1994-08-23 1997-09-16 Denticator International, Inc. Disposable dental prophylaxis handpiece
US5697773A (en) * 1994-08-23 1997-12-16 Denticator International, Inc. Rotary fluid reaction device having hinged vanes
US5743718A (en) * 1995-06-07 1998-04-28 Denticator International, Inc. Compressed air driven disposable hand tool having a rotor with radially moving vanes
US5932940A (en) * 1996-07-16 1999-08-03 Massachusetts Institute Of Technology Microturbomachinery
US6203322B1 (en) 1999-04-15 2001-03-20 David Kraenzle Dental prophylaxis angle
USD612611S1 (en) 2003-02-11 2010-03-30 The Gillette Company Head of a toothbrush
US10989306B2 (en) 2018-03-28 2021-04-27 Graco Minnesota Inc. Packing stack carrier for paint and other fluid pumps
US11458605B2 (en) 2018-03-28 2022-10-04 Graco Minnesota Inc. Packing insertion tool for paint and other fluid pumps

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2618739A1 (de) * 1976-04-28 1977-11-17 Kaltenbach & Voigt Turbineneinsatz fuer das kopfgehaeuse eines zahnaerztlichen turbinen-winkelstueckes
JPH0648823Y2 (ja) * 1987-06-25 1994-12-12 日本電気ホームエレクトロニクス株式会社 差動トランス
JPS645423U (ja) * 1987-06-25 1989-01-12
DE4234287A1 (de) * 1992-10-10 1994-04-14 Melchior Hans Ulrich Dentalhandbohrer oder -fräser
TWI697381B (zh) * 2013-03-06 2020-07-01 美商Ｗｔｏ股份有限公司 用於切割工具的渦輪驅動動力單元

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1800459A (en) * 1929-02-11 1931-04-14 Leonard A Maclean Package for patches
US1891624A (en) * 1931-09-24 1932-12-20 George B Graff Company Patch package
US2005849A (en) * 1933-07-06 1935-06-25 Perry R Skinner Angle dental handpiece
US2945299A (en) * 1957-08-22 1960-07-19 Carroll S Fritz Dental handpiece
US3072244A (en) * 1960-07-11 1963-01-08 Smith Joseph Leigh Display capsule
US3324553A (en) * 1957-08-20 1967-06-13 John V Borden Dental handpiece
US3325899A (en) * 1964-09-25 1967-06-20 American Hospital Supply Corp Dental handpiece and collet wrench therefor
US3345731A (en) * 1965-06-21 1967-10-10 James E Parker Tool for inserting locking ball in retainer block

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1800459A (en) * 1929-02-11 1931-04-14 Leonard A Maclean Package for patches
US1891624A (en) * 1931-09-24 1932-12-20 George B Graff Company Patch package
US2005849A (en) * 1933-07-06 1935-06-25 Perry R Skinner Angle dental handpiece
US3324553A (en) * 1957-08-20 1967-06-13 John V Borden Dental handpiece
US2945299A (en) * 1957-08-22 1960-07-19 Carroll S Fritz Dental handpiece
US3072244A (en) * 1960-07-11 1963-01-08 Smith Joseph Leigh Display capsule
US3325899A (en) * 1964-09-25 1967-06-20 American Hospital Supply Corp Dental handpiece and collet wrench therefor
US3345731A (en) * 1965-06-21 1967-10-10 James E Parker Tool for inserting locking ball in retainer block

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5374189A (en) * 1992-09-09 1994-12-20 Denticator International, Inc. Integrally formed disposable prophy angle and drive mechanism therefor
US5405265A (en) * 1993-07-30 1995-04-11 Denticator International, Inc. Dental prophylaxis cup
US5667383A (en) * 1994-08-23 1997-09-16 Denticator International, Inc. Disposable dental prophylaxis handpiece
US5697773A (en) * 1994-08-23 1997-12-16 Denticator International, Inc. Rotary fluid reaction device having hinged vanes
US5743718A (en) * 1995-06-07 1998-04-28 Denticator International, Inc. Compressed air driven disposable hand tool having a rotor with radially moving vanes
US5984654A (en) 1995-06-07 1999-11-16 Denticator International, Inc. Compressed air driven disposable hand tool having a rotor with radially moving vanes
US5932940A (en) * 1996-07-16 1999-08-03 Massachusetts Institute Of Technology Microturbomachinery
US6392313B1 (en) 1996-07-16 2002-05-21 Massachusetts Institute Of Technology Microturbomachinery
US6203322B1 (en) 1999-04-15 2001-03-20 David Kraenzle Dental prophylaxis angle
USD612611S1 (en) 2003-02-11 2010-03-30 The Gillette Company Head of a toothbrush
US10989306B2 (en) 2018-03-28 2021-04-27 Graco Minnesota Inc. Packing stack carrier for paint and other fluid pumps
US11458605B2 (en) 2018-03-28 2022-10-04 Graco Minnesota Inc. Packing insertion tool for paint and other fluid pumps

Also Published As

Publication number Publication date
JPS5194190U (ja) 1976-07-28
GB1367733A (en) 1974-09-25
CH560315A5 (ja) 1975-03-27
IT984746B (it) 1974-11-20
FR2178918B1 (ja) 1978-05-26
SE392033B (sv) 1977-03-14
DE2313060A1 (de) 1973-10-31
JPS4915286A (ja) 1974-02-09
JPS5353354Y2 (ja) 1978-12-20
FR2178918A1 (ja) 1973-11-16
DE2313060B2 (de) 1977-09-22

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