FR2426354A1 - ELECTRIC DENTISTRY MOTOR - Google Patents

ELECTRIC DENTISTRY MOTOR

Info

Publication number
FR2426354A1
FR2426354A1 FR7912566A FR7912566A FR2426354A1 FR 2426354 A1 FR2426354 A1 FR 2426354A1 FR 7912566 A FR7912566 A FR 7912566A FR 7912566 A FR7912566 A FR 7912566A FR 2426354 A1 FR2426354 A1 FR 2426354A1
Authority
FR
France
Prior art keywords
cooling
commutator
air
contact
line
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
FR7912566A
Other languages
French (fr)
Other versions
FR2426354B1 (en
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.)
Kaltenbach and Voigt GmbH
Original Assignee
Kaltenbach and Voigt GmbH
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 Kaltenbach and Voigt GmbH filed Critical Kaltenbach and Voigt GmbH
Publication of FR2426354A1 publication Critical patent/FR2426354A1/en
Application granted granted Critical
Publication of FR2426354B1 publication Critical patent/FR2426354B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
    • 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
    • A61C1/02—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
    • A61C1/06—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 electric drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dc Machiner (AREA)

Abstract

The electric motor having a flat commutator (5) whose contact surface (6) (which lies in a radial plane) is made contact with by brushes which are pressed against it in the axial direction is provided with a compressed-air cooling line (9) which is directed onto the commutator contact surface. The outlet opening (8) of the cooling-air line rests on the commutator, with respect to the contact region of the brushes, in such a manner that the air jet provides an optimum cooling effect by acting on this region, which is particularly highly stressed by friction and contact losses. The said cooling-air line (9) branches off a main compressed-air line (15) which ends in the vicinity of that end of the rotor winding which is remote from the commutator and from which the cooling air flows back via the gap between the rotor (3) and the stator (2) and is furthermore used for additional cooling of the commutator and of the motor bearing (11) on the commutator side. The two cooling-air lines (9, 15) enable optimum cooling of the active parts of the electric motor.
FR7912566A 1978-05-18 1979-05-17 ELECTRIC DENTISTRY MOTOR Granted FR2426354A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782821769 DE2821769A1 (en) 1978-05-18 1978-05-18 DENTAL ELECTRIC MOTOR

Publications (2)

Publication Number Publication Date
FR2426354A1 true FR2426354A1 (en) 1979-12-14
FR2426354B1 FR2426354B1 (en) 1981-10-30

Family

ID=6039659

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912566A Granted FR2426354A1 (en) 1978-05-18 1979-05-17 ELECTRIC DENTISTRY MOTOR

Country Status (5)

Country Link
JP (2) JPS54150892A (en)
CH (1) CH638065A5 (en)
DE (1) DE2821769A1 (en)
FR (1) FR2426354A1 (en)
IT (2) IT1118684B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037646A1 (en) * 1980-04-04 1981-10-14 Toyota Jidosha Kabushiki Kaisha A rotary type electrostatic spray painting device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719910A (en) * 1985-04-29 1988-01-19 Jensen Robert L Oscillating ventilator and method
KR100806808B1 (en) 2000-10-17 2008-02-22 엘지.필립스 엘시디 주식회사 Liquid Crystal Display for Equivalent Resistance Wiring
JP5527910B2 (en) 2012-09-24 2014-06-25 株式会社ナカニシ Dental handpiece drive motor and dental treatment system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH302282A (en) * 1951-03-13 1954-10-15 Licentia Gmbh Electric machine with commutator and with forced ventilation.
DE1025060B (en) * 1956-07-19 1958-02-27 Siemens Ag Ventilation arrangement for the commutator of electrical machines
FR1598135A (en) * 1968-12-26 1970-06-29
DE2506184A1 (en) * 1974-02-15 1975-08-21 Hitachi Ltd DC machine with brush holder as partition - side slots connect inner and outer regions for air ventilation
DE2537818A1 (en) * 1974-08-24 1976-03-04 Mabuchi Motor Co FORCED-COOLED ELECTRIC MOTOR
FR2345135A1 (en) * 1976-03-26 1977-10-21 Siemens Ag DENTAL MOTOR FOR A HANDPIECE, POSSIBLE BENDED, DENTISTRY
US4086034A (en) * 1973-03-15 1978-04-25 Airborne Mfg. Co. Fluid cooled commutated electric motor driving a pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH302282A (en) * 1951-03-13 1954-10-15 Licentia Gmbh Electric machine with commutator and with forced ventilation.
DE1025060B (en) * 1956-07-19 1958-02-27 Siemens Ag Ventilation arrangement for the commutator of electrical machines
FR1598135A (en) * 1968-12-26 1970-06-29
US4086034A (en) * 1973-03-15 1978-04-25 Airborne Mfg. Co. Fluid cooled commutated electric motor driving a pump
DE2506184A1 (en) * 1974-02-15 1975-08-21 Hitachi Ltd DC machine with brush holder as partition - side slots connect inner and outer regions for air ventilation
DE2537818A1 (en) * 1974-08-24 1976-03-04 Mabuchi Motor Co FORCED-COOLED ELECTRIC MOTOR
FR2345135A1 (en) * 1976-03-26 1977-10-21 Siemens Ag DENTAL MOTOR FOR A HANDPIECE, POSSIBLE BENDED, DENTISTRY

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037646A1 (en) * 1980-04-04 1981-10-14 Toyota Jidosha Kabushiki Kaisha A rotary type electrostatic spray painting device

Also Published As

Publication number Publication date
JPS5866857U (en) 1983-05-07
FR2426354B1 (en) 1981-10-30
DE2821769A1 (en) 1979-11-22
IT7953261V0 (en) 1979-05-17
JPS54150892A (en) 1979-11-27
IT1118684B (en) 1986-03-03
CH638065A5 (en) 1983-08-31
IT7968044A0 (en) 1979-05-17

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Legal Events

Date Code Title Description
ST Notification of lapse