US3844039A - Device for operating dental drilling machines - Google Patents

Device for operating dental drilling machines Download PDF

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Publication number
US3844039A
US3844039A US00048616A US4861670A US3844039A US 3844039 A US3844039 A US 3844039A US 00048616 A US00048616 A US 00048616A US 4861670 A US4861670 A US 4861670A US 3844039 A US3844039 A US 3844039A
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United States
Prior art keywords
drive
turbine
valve
electronic
electric motor
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
US00048616A
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English (en)
Inventor
O Fleer
H Grill
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to US356752A priority Critical patent/US3902247A/en
Application granted granted Critical
Publication of US3844039A publication Critical patent/US3844039A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • A61C1/0007—Control devices or systems
    • A61C1/0015—Electrical systems

Definitions

  • This invention relates to a device used for operating dental drilling machines and having a manually operated setter with an electrical actuating member, for example, a potentiometer, for setting the desired driving speed and a rear regulating device which sets the drive to the number of revolutions supplied by the setter, more particularly, an actuating device.
  • an electrical actuating member for example, a potentiometer
  • Dentists are now required to use for the treatment of teeth drills with so many different rotational speeds, that such requirements cannot be taken care of by a single drilling machine. Consequently dental units have been provided which have electrical drives as well as compressed air turbine drives. The dentist decides depending upon the required treatment whether to switch on the turbine with a very high number of revolutions or the electrical drill. It is already known to provide such apparatus with actuating devices operated preferably by foot, by means of which it is possible to open selectively either the actuating electronic means for the electrical drill or the valve introducing compressed air into the turbine. Often when the electric motor is switched on, a second compressed air conduit is opened to provide a flow of cooling air for the electric motor.
  • An object of the present invention is to eliminate this drawback of existing constructions.
  • Another object is to provide a device having the largest possible number of uniform parts which can be used to operate the electric motor as Well as the turbine within a wide range as far as their number of revolutions is concerned.
  • the regulating device for the electric motor with a switch which is preferably operated from the support of the machine and which switches on the outlet of the regulating device, depending as to whether the one or the other of the drives is to be used, either to the electric motor or to an electric valve which regulates the amountof compressed air supplied to the turbine.
  • the electronic actuating means for the electric motor are thus doubly utilized.
  • the present invention also provides that an additional voltage be applied to the outlet of the regulating device, which corresponds to the lower responding voltage of the magnetic valve and is switched on when the turbine is lifted.
  • a pressure or flow gauge in the inflow of the compressed air conduit, the measured value of which is transmitted to the regulating device, for example, an electronic device as an actual value, so that it can carry out an adjustment of the valve opening corresponding to the required size set by the dentist.
  • FIGURE is a diagrammatic representation of the device of the present invention.
  • the device shown in the drawing includes an actuating device which, for example, can be operated by foot and which includes a switch 1 for switching on and off a setter 2, consisting, for example, of a potentiometer, for supplying the number of revolutions of the drill drive.
  • the actuating device operates with an electronic device 3 having outlet conduits 4 and 5 extending to the motor 7 and an outlet conduit 6 connected to the magnetic valve 8.
  • a switching device 9 having switches 10 and 11 is used for actuating the motor 7 or the magnetic valve 8.
  • the magnetic valve 8 is guided through the conduit 6 to the electronic device which provides an additional voltage potential, to compensate for the swell value of the valve.
  • the valve itself can be provided with a controlling spring of corresponding size, or it can be provided with a piston actuated by compressed air which acts as control against the pulling force provided by the magnet.
  • Pressure or flow speed in conduit 13 toward the turbine can be measured by a pressure gauge 12 and the value is transmitted through conduits 14 to the electronic device, which adjusts its outgoing voltage relatively to the required value provided by the potentiometer.
  • An important feature of the present invention consists in that the electronic regulating device 3 which serves for regulating the r.p.m. of the electrically operated motor, is also used for regulating the r.p.m. of the turbine in that the outlet of the regulating device is connected by a switch with an electric valve which depending upon the provided voltage supplied by the regulating device, regulates the amount of compressed air supplied to the turbine and thus its r.p.m. Consequently the regulating device for the electric motor is used for two purposes.
  • the advantage is that the speed of the turbine can be regulated as well, which up to now was possible only within comparatively small limits, and that a substantial number of pneumatic and electrical devices can be eliminated since a single foot contact 1, 2 and a single regulating device 3 are used to change the speeds of two drives with different driving systems, namely, electrical and mechanical ones.
  • the connection of the two circuits to the two drives in such manner that when one drive is actuated the other will be switched off, has the advantage that the operating doctor need not concern himself at all with the operation of his device. He operates the same operating device, namely, the potentiometer with the same operational settings for the turbine, as well as for the drive of the electric motor.
  • a device for operating a dental drill with an electric motor and a dental drill with a turbine drive said device having a control element including a potentiometer controlling said dental drills, an electronic actuating device connected with said potentiometer, an electric valve for varying the amount of compressed air supplied to the turbine drive, and a switch device connected with said electronic actuating device and connecting selectively said electric motor and said electric valve with the electronic actuating device.
  • a device in accordance with claim 2 comprising a pressure gauge connected to said turbine drive and said electronic actuating device to supply an existing value for regulating purposes.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (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)
US00048616A 1969-06-28 1970-05-15 Device for operating dental drilling machines Expired - Lifetime US3844039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US356752A US3902247A (en) 1970-05-15 1973-05-03 Device for operating dental hand pieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691932841 DE1932841B2 (de) 1969-06-28 1969-06-28 Einrichtung zum betrieb zahnaerztlicher bohrmaschinen

Publications (1)

Publication Number Publication Date
US3844039A true US3844039A (en) 1974-10-29

Family

ID=5738249

Family Applications (1)

Application Number Title Priority Date Filing Date
US00048616A Expired - Lifetime US3844039A (en) 1969-06-28 1970-05-15 Device for operating dental drilling machines

Country Status (2)

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US (1) US3844039A (de)
DE (1) DE1932841B2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986262A (en) * 1974-02-19 1976-10-19 Progressive Machine Products, Inc. Variable air actuated control unit for electrical dental handpieces
US3994069A (en) * 1974-04-11 1976-11-30 Siemens Aktiengesellschaft Dental installation
US7967605B2 (en) 2004-03-16 2011-06-28 Guidance Endodontics, Llc Endodontic files and obturator devices and methods of manufacturing same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3448005A1 (de) * 1984-11-23 1986-05-28 Siemens AG, 1000 Berlin und 8000 München Zahnaerztliches geraet mit elektrischen und pneumatischen steuergliedern
DE3442846A1 (de) 1984-11-23 1986-06-05 Siemens AG, 1000 Berlin und 8000 München Ventilsteuereinrichtung fuer ein zahnaerztliches geraet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259430A (en) * 1963-12-10 1966-07-05 Morita Mfg Dental apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259430A (en) * 1963-12-10 1966-07-05 Morita Mfg Dental apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986262A (en) * 1974-02-19 1976-10-19 Progressive Machine Products, Inc. Variable air actuated control unit for electrical dental handpieces
US3994069A (en) * 1974-04-11 1976-11-30 Siemens Aktiengesellschaft Dental installation
US7967605B2 (en) 2004-03-16 2011-06-28 Guidance Endodontics, Llc Endodontic files and obturator devices and methods of manufacturing same
US10052173B2 (en) 2004-03-16 2018-08-21 Guidance Endodontics, Llc Endodontic files and obturator devices and methods of manufacturing same

Also Published As

Publication number Publication date
DE1932841B2 (de) 1976-10-14
DE1932841A1 (de) 1971-01-07

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