US3534943A - Dental material measuring apparatus - Google Patents

Dental material measuring apparatus Download PDF

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Publication number
US3534943A
US3534943A US721300A US3534943DA US3534943A US 3534943 A US3534943 A US 3534943A US 721300 A US721300 A US 721300A US 3534943D A US3534943D A US 3534943DA US 3534943 A US3534943 A US 3534943A
Authority
US
United States
Prior art keywords
mixing
metering
motor
cylinder
switch
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
US721300A
Other languages
English (en)
Inventor
Wilhelm Ahrens
Hans Lea
Fritz Rohm
Heinz Strahle
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.)
Evonik Operations GmbH
Original Assignee
Degussa 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
Priority claimed from DE1566287A external-priority patent/DE1566287C3/de
Application filed by Degussa GmbH filed Critical Degussa GmbH
Application granted granted Critical
Publication of US3534943A publication Critical patent/US3534943A/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
    • A61C5/00—Filling or capping teeth
    • A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
    • A61C5/68—Mixing dental material components for immediate application to a site to be restored, e.g. a tooth cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/714—Feed mechanisms for feeding predetermined amounts
    • B01F35/7141—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames
    • B01F35/71411—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis
    • B01F35/714111—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis the measuring chambers being pockets on the circumference of a drum rotating about a horizontal axis with discharging by gravity
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S366/00—Agitating
    • Y10S366/601—Motor control
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S366/00—Agitating
    • Y10S366/602—Amalgam mixer, e.g. dental filling

Definitions

  • This invention relates to an apparatus for metering and mixing the component parts of materials used for filling teeth.
  • An apparatus of this sort has two containers for the mercury and amalgam which supply two separate chambers in a metering cylinder. When this cylinder is rotated 180, both components are dumped into a funnel which ends in a so-called mixing tube. The metering cylinder is turned by means of a manually rotated knob and returned to its neutral position in the same way.
  • An apparatus of this sort has the disadvantage that a plurality of movements must take place if a multiple of the amount of basic material is necessary in order to make up the entire amount to be metered. Also, the mixing appratus for the mixing tube must be disconnected by a second operation.
  • the heretofore used apparatus can be advantageously improved by using various push keys to pro-select the portions to be metered.
  • These push keys can be used to start the metering as well as the mixing, and a special switch is available so that only the mixing can be started, and, for example, cement can be mixed in a special capsule without starting the metering for the amalgam.
  • FIG. 1 is a schematic plan view of the apparatus
  • FIG. 2 is a circuit diagram for the apparatus
  • FIG. 3 is a partial cross-sectional view through the metering means.
  • the apparatus 1 has containers 2 and 2a for holding the mercury and amalgam.
  • Metering cylinder 3 is beneath the containers.
  • the materials are dumped from the metering cylinder into a mixing tube 4 which is swung by motor 5.
  • the metering cylinder 3 is turned by means of motor 6 and reduction gear 7.
  • the cylinder has a peripheral speed of 30 mm. per second.
  • the mixing motor is started by a push key 8 joined to a remote control switch 9 and a time relay 10 which sets the period necessary for mixing the materials.
  • the apparatus is operated by pushing the key 8 whereby the mixing motor and metering motor 6 are started simultaneously.
  • the stopped or neutral position of the metering cylinder is controlled by the cam operated terminal 3,534,943 Patented Oct. 20, 1970 ice switch 12.
  • a magnetic brake 11 is joined to the mixing motor 5 so that at the end of the mixing process, the mixing tube can be immediately returned to its initial position.
  • a mixing capsule 13 is threaded on the end of the mixing tube 4. When capsule 13 is screwed or unscrewed from the mixing tube, it actuates a control switch 14 in the main electrical circuit for the apparatus.
  • FIG. 2 shows the operation of the main electrical circuit.
  • the main electric circuit is closed by the intermittent switch 14.
  • the remote control switch 9 is then closed by pushing key 8.
  • the closed remote control switch is held by time relay 10.
  • Brake magnet 11 is lifted by being connected to the remote control switch 9, and at the same time, mixing motor 5 is started.
  • metering motor 6 is started by the closing of switch 12.
  • a cam on the shaft of metering motor 6 will open switch 12 after each rotation and turn off metering motor 6.
  • time relay 10 opens the main electric circuit by opening switch 9 so that the mixing motor 5 is turned off and magnet 11 used to return the tube 4 to its initial position.
  • the time periods for mixing are variable from zero to sixty seconds and they can be separattely pre-selected for each metering process by means of the time relay. This latter can be mechanical, and/or a combined structure.
  • FIG. 3 shows the detailed construction of the metering structure.
  • the cylinder is constructed so that the diameters of the individual segments for the amalgam and mercury are different. The incremental differences in diameter are beween 35 and mm.
  • the space or clearance 23 adjacent the mercury area is very small so that mercury cannot get into the space between the cylinder and the guide sleeve 24. This clearance 23 is less than the diameter of the smallest particle of mercury.
  • Slot 25 in the chamber below the amalgam container is relatively wide, for example, 7 mm. so that even when a small amount of the hard material enters the space the cylinder will not become stuck within the guide sleeve.
  • An additional seal against the escape of mercury and/or amalgam into the space between the cylinder and the sleeve is accomplished by means of felt rings 26.
  • a metering and mixing apparatus for preparing dental fillings and the like comprising mixing means, dental material holding containers, material metering means joined to said containers to measure and deliver to said mixing means the necessary amounts of the materials to be mixed, first electric motor means drivingly connected to said metering means, said mixing means including a removabl mixing capsule operatively positioned on said mixing means to receive said materials to be mixed, second electric motor means drivingly connected to said mixing means, an electric circuit for actuating said first and second motor means, said electric circuit including a switch positioned to be closed by placing said mixing capsule on said mixing means and to be opened by re- 4 moval of said mixing capsule from said mixing means for preventing said mixing apparatus from being inadvertently operated Without said mixing capsule being in place.
  • the apparatus of claim 1 including adjustable time switches in said electric circuit to determine the times of operation of said motors.

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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
US721300A 1967-04-20 1968-04-15 Dental material measuring apparatus Expired - Lifetime US3534943A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEW0043805 1967-04-20
DE1566287A DE1566287C3 (de) 1967-04-20 1967-04-20 Dosier- und Mischgerät für die Mischungsbestandteile von Zahnfüllungen
DEW0043806 1967-04-20

Publications (1)

Publication Number Publication Date
US3534943A true US3534943A (en) 1970-10-20

Family

ID=27213472

Family Applications (1)

Application Number Title Priority Date Filing Date
US721300A Expired - Lifetime US3534943A (en) 1967-04-20 1968-04-15 Dental material measuring apparatus

Country Status (3)

Country Link
US (1) US3534943A (fr)
CH (1) CH480835A (fr)
FR (1) FR1572391A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814387A (en) * 1971-12-01 1974-06-04 Degussa Apparatus for dosing and mixing liquid or solid materials for dental purposes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879042A (en) * 1957-07-17 1959-03-24 Robert G Jones Automatic amalgamator
GB975174A (en) * 1960-07-02 1964-11-11 Walter U Schmitt G M B H A mixer for the components of dental fillings
US3271011A (en) * 1963-11-06 1966-09-06 Walter U Schmitt G M B H Dr Metering and mixing device for dental materials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879042A (en) * 1957-07-17 1959-03-24 Robert G Jones Automatic amalgamator
GB975174A (en) * 1960-07-02 1964-11-11 Walter U Schmitt G M B H A mixer for the components of dental fillings
US3271011A (en) * 1963-11-06 1966-09-06 Walter U Schmitt G M B H Dr Metering and mixing device for dental materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814387A (en) * 1971-12-01 1974-06-04 Degussa Apparatus for dosing and mixing liquid or solid materials for dental purposes

Also Published As

Publication number Publication date
FR1572391A (fr) 1969-06-27
CH480835A (de) 1969-11-15

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