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WO2016170275A1 - Connection adapter for a vacuum mixer - Google Patents

Connection adapter for a vacuum mixer Download PDF

Info

Publication number
WO2016170275A1
WO2016170275A1 PCT/FR2016/050930 FR2016050930W WO2016170275A1 WO 2016170275 A1 WO2016170275 A1 WO 2016170275A1 FR 2016050930 W FR2016050930 W FR 2016050930W WO 2016170275 A1 WO2016170275 A1 WO 2016170275A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection adapter
bore
mixer
vacuum mixer
sectors
Prior art date
Application number
PCT/FR2016/050930
Other languages
French (fr)
Inventor
Catherine DENAIFFE
Original Assignee
Denaiffe Catherine
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 Denaiffe Catherine filed Critical Denaiffe Catherine
Publication of WO2016170275A1 publication Critical patent/WO2016170275A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/112—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts comprising torque-transmitting surfaces, e.g. bayonet joints
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/213—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts characterised by the connection with the drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/805—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis wherein the stirrers or the receptacles are moved in order to bring them into operative position; Means for fixing the receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/88—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with a separate receptacle-stirrer unit that is adapted to be coupled to a drive mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • 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
    • A61C5/70—Tooth crowns; Making thereof
    • A61C5/77—Methods or devices for making crowns

Definitions

  • the present invention relates to a device for improving vacuum mixers for example dental prosthesis laboratories. It is an adapter that makes it possible to make the axis of the mixing bowl integral with the axis of the mixer.
  • These vacuum mixers comprise an axis provided with a bore adapted to receive the axis of the mixing bowl and a pin, passing through this bore, adapted to slide in the vertical groove of the axis of the mixing bowl in order to transmit to it. the rotation torque of the mixer shaft (see Figure 1).
  • the adapter object of the invention advantageously makes it possible to make the axis of the mixing bowl and the drive shaft of the machine integral, and to no longer ask the operator to hold the bowl for several minutes. The operator can then do other tasks and save production time (see Figure 2).
  • the adapter object of the invention, is formed of two parts (see Figure 3) cylindrical A and B, and in particular coaxial.
  • the cylindrical portion A has a diameter that allows it to fit into the bore of the mixer shaft with a functional clearance.
  • FIG. 2 is a schematic representation of the principle of the invention
  • FIG. 3 is a schematic view of the adapter of the invention.
  • FIG. 4 is a more detailed view of FIG.
  • the cylindrical portion A of the adapter comprises:
  • This cylindrical portion A has a vertical groove G axially separating the four sectors C / D and E / F and allowing the passage of the pin of the axis of the mixer between these sectors.
  • This groove G advantageously makes it possible to transmit, by the circular pressure applied by the pin on the sectors C and D, the torque of rotation of the axis of the mixer to the adapter, object of the invention.
  • the adapter object of the invention, also comprises a cylindrical portion B having a bore H, the diameter of which allows it to receive the axis of the mixing bowl with a functional game.
  • the bore H comprises a cylindrical axial groove I having a depth carrying the groove bottom diameter equal to the outside diameter of the annular part J
  • This groove I is able to receive a flexible annular piece J.
  • This annular piece has an outer diameter equal to at the groove bottom diameter of the groove I and an inside diameter sufficiently smaller than the diameter of the axis of the mixing bowl in order to obtain a clamping of the annular piece on the axis of the mixing bowl.
  • the compressions of the annular piece flexible provided by the axis of the mixing bowl when it is placed on the adapter, object of the invention, allows to obtain a lateral pressure exerted both on the bottom of the groove I on the axis of the mixing bowl.
  • this lateral pressure makes it possible to hold the axis of the mixing bowl vertically in the bore of the adapter
  • the bore H comprises two diametrically opposite holes K and L, able to receive and hold a pin M through the bore H of the adapter object of the invention.
  • This pin is intended to be housed in the vertical groove of the axis of the mixing bowl during the establishment of it
  • this pin makes it possible to transmit, by the circular pressure which it applies on the sides of the groove, the torque of rotation of the adapter to the axis of the mixing bowl.
  • the installation of the adapter, object of the invention, on the axis of the mixer and the mixing bowl on the adapter thus allows to maintain vertically mixing bowl on the axis of the mixer and to transmit the torque of the axis of the mixer to the axis of the mixing bowl.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Mechanical Engineering (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)
  • Accessories For Mixers (AREA)

Abstract

The present invention relates to a device for improving the vacuum mixers intended for dental prosthesis laboratories. The invention relates to an adapter for rigidly connecting the shaft of the mixer to the shaft of the mixing bowl. The adapter mainly comprises two cylindrical portions A and B. Portion A is intended to be inserted in the shaft of the mixer and to rigidly connect the adapter to said shaft. Portion B of the adapter is intended to receive the shaft of the mixing bowl and rigidly connect the adapter to the shaft of the mixing bowl.

Description

ADAPTATEUR DE LIAISON POUR MELANGEUR SOUS VIDE  CONNECTION ADAPTER FOR VACUUM MIXER
La présente invention concerne un dispositif destiné à améliorer les mélangeurs sous vide destinés par exemple aux laboratoires de prothèses dentaires. Il s'agit d'un adaptateur qui permet de rendre solidaire, l'axe du bol de mélange à l'axe du mélangeur. The present invention relates to a device for improving vacuum mixers for example dental prosthesis laboratories. It is an adapter that makes it possible to make the axis of the mixing bowl integral with the axis of the mixer.
A ce jour, sur certains des mélangeurs sous vide de l'art antérieur, l'opérateur est obligé de maintenir manuellement le bol de mélange contre l'axe d'entraînement du mélangeur pendant toute la durée de l'opération qui nécessite plusieurs minutes. To date, on some of the vacuum mixers of the prior art, the operator is forced to manually maintain the mixing bowl against the drive shaft of the mixer for the duration of the operation that requires several minutes.
Ces mélangeurs sous vide comportent un axe pourvu d'un alésage apte à recevoir l'axe du bol de mélange et une goupille, traversant cet alésage, apte à se glisser dans la rainure verticale de l'axe du bol de mélange afin de lui transmettre le couple de rotation de l'axe du mélangeur (voir figure 1). These vacuum mixers comprise an axis provided with a bore adapted to receive the axis of the mixing bowl and a pin, passing through this bore, adapted to slide in the vertical groove of the axis of the mixing bowl in order to transmit to it. the rotation torque of the mixer shaft (see Figure 1).
L'adaptateur, objet de l'invention, permet avantageusement de rendre solidaires l'axe du bol de mélange et l'axe d'entraînement de la machine, et de ne plus demander à l'opérateur de maintenir le bol pendant plusieurs minutes. L'opérateur peut alors faire d'autres taches et gagner du temps de production (voir figure 2). The adapter object of the invention advantageously makes it possible to make the axis of the mixing bowl and the drive shaft of the machine integral, and to no longer ask the operator to hold the bowl for several minutes. The operator can then do other tasks and save production time (see Figure 2).
L'adaptateur, objet de l'invention, est formé de deux parties (voir figure 3) cylindriques A et B, et notamment coaxiales. La partie cylindrique A a un diamètre qui lui permet de s'insérer dans l'alésage de l'axe du mélangeur avec un jeu fonctionnel. The adapter, object of the invention, is formed of two parts (see Figure 3) cylindrical A and B, and in particular coaxial. The cylindrical portion A has a diameter that allows it to fit into the bore of the mixer shaft with a functional clearance.
L'invention sera mieux comprise à l'aide des figures annexées, dans lesquelles : The invention will be better understood with the aid of the appended figures, in which:
• la figure 1 est une représentation schématique de la solution de l'état antérieur de la technique ;  • Figure 1 is a schematic representation of the solution of the prior art;
• la figure 2 est une représentation schématique du principe de l'invention ;  FIG. 2 is a schematic representation of the principle of the invention;
· la figure 3 est une vue schématique de l'adaptateur de l'invention ; FIG. 3 is a schematic view of the adapter of the invention;
• la figure 4 est une vue plus détaillée de la figure 3.  FIG. 4 is a more detailed view of FIG.
La partie cylindrique A de l'adaptateur comporte : The cylindrical portion A of the adapter comprises:
• deux secteurs C et D diamétralement opposés formant chacun une rainure circulaire horizontale apte à recevoir la goupille d'entraînement de l'axe d'entraînement du mélangeur, et • deux secteurs circulaires E et F diamétralement opposés permettant, avantageusement, de maintenir verticalement l'adaptateur, objet de l'invention, sur la goupille de l'axe d'entraînement du mélangeur. Cette partie cylindrique A comporte une rainure G verticale séparant axialement les quatre secteurs C / D et E / F et permettant le passage de la goupille de l'axe du mélangeur entre ces secteurs. Two diametrically opposed sectors C and D, each forming a horizontal circular groove adapted to receive the drive pin of the drive shaft of the mixer, and Two diametrically opposite circular sectors E and F advantageously making it possible to hold the adapter according to the invention vertically on the pin of the drive shaft of the mixer. This cylindrical portion A has a vertical groove G axially separating the four sectors C / D and E / F and allowing the passage of the pin of the axis of the mixer between these sectors.
Cette rainure G permet, avantageusement, de transmettre, par la pression circulaire appliquée par la goupille sur les secteurs C et D, le couple de rotation de l'axe du mélangeur à l'adaptateur, objet de l'invention This groove G advantageously makes it possible to transmit, by the circular pressure applied by the pin on the sectors C and D, the torque of rotation of the axis of the mixer to the adapter, object of the invention.
L'adaptateur, objet de l'invention, comporte également une partie cylindrique B comportant un alésage H, dont le diamètre lui permet de recevoir l'axe du bol de mélange avec un jeu fonctionnel. The adapter, object of the invention, also comprises a cylindrical portion B having a bore H, the diameter of which allows it to receive the axis of the mixing bowl with a functional game.
L'alésage H comporte une gorge axiale cylindrique I présentant une profondeur portant le diamètre de fond de gorge égal au diamètre extérieur de la pièce annulaire J Cette gorge I est apte à recevoir une pièce annulaire souple J. Cette pièce annulaire comporte un diamètre extérieur égal au diamètre de fond de gorge de la gorge I et un diamètre intérieur suffisamment inférieur au diamètre de l'axe du bol de mélange afin d'obtenir un serrage de la pièce annulaire sur l'axe du bol de mélange La compressions de la pièce annulaire souple apportée par l'axe du bol de mélange lors de sa mise en place sur l'adaptateur, objet de l'invention, permet, d'obtenir une pression latérale exercée tant sur le fond de la gorge I que sur l'axe du bol de mélange. The bore H comprises a cylindrical axial groove I having a depth carrying the groove bottom diameter equal to the outside diameter of the annular part J This groove I is able to receive a flexible annular piece J. This annular piece has an outer diameter equal to at the groove bottom diameter of the groove I and an inside diameter sufficiently smaller than the diameter of the axis of the mixing bowl in order to obtain a clamping of the annular piece on the axis of the mixing bowl The compressions of the annular piece flexible provided by the axis of the mixing bowl when it is placed on the adapter, object of the invention, allows to obtain a lateral pressure exerted both on the bottom of the groove I on the axis of the mixing bowl.
Avantageusement, cette pression latérale permet de maintenir verticalement l'axe du bol de mélange dans l'alésage de l'adaptateur Advantageously, this lateral pressure makes it possible to hold the axis of the mixing bowl vertically in the bore of the adapter
L'alésage H comporte deux perçages K et L diamétralement opposés, aptes à recevoir et à maintenir une goupille M traversant l'alésage H de l'adaptateur, objet de l'invention. The bore H comprises two diametrically opposite holes K and L, able to receive and hold a pin M through the bore H of the adapter object of the invention.
Cette goupille est destinée à se loger dans la rainure verticale de l'axe du bol de mélange lors de la mise en place de celui-ci Avantageusement, cette goupille permet de transmettre, par la pression circulaire qu'elle applique sur les côtés de la rainure, le couple de rotation de l'adaptateur à l'axe du bol de mélange La mise en place de l'adaptateur, objet de l'invention, sur l'axe du mélangeur et du bol de mélange sur l'adaptateur permet donc de maintenir verticalement le bol de mélange sur l'axe du mélangeur et de transmettre le couple de rotation de l'axe du mélangeur à l'axe du bol de mélange. This pin is intended to be housed in the vertical groove of the axis of the mixing bowl during the establishment of it Advantageously, this pin makes it possible to transmit, by the circular pressure which it applies on the sides of the groove, the torque of rotation of the adapter to the axis of the mixing bowl. The installation of the adapter, object of the invention, on the axis of the mixer and the mixing bowl on the adapter thus allows to maintain vertically mixing bowl on the axis of the mixer and to transmit the torque of the axis of the mixer to the axis of the mixing bowl.

Claims

REVENDICATIONS
Adaptateur de liaison pour mélangeur sous vide caractérisé en ce qu'il est formé de deux parties cylindriques A et B comportant pour la partie A différents secteurs C, D, E et F et pour la partie B deux perçages diamétralement opposés et un alésage comportant une gorge axiale circulaire apte à recevoir une pièce annulaire souple. Connection adapter for vacuum mixer characterized in that it is formed of two cylindrical parts A and B having for part A different sectors C, D, E and F and for part B two diametrically opposed holes and a bore having a circular axial groove adapted to receive a flexible annular piece.
Adaptateur de liaison pour mélangeur sous vide selon la revendication 1 , caractérisé en ce que le diamètre extérieur de la partie cylindrique A présente une dimension telle qu'elle lui permet de s'insérer dans l'alésage de l'axe du mélangeur avec un jeu fonctionnel. Vacuum mixer connection adapter according to Claim 1, characterized in that the outer diameter of the cylindrical portion A has a dimension such that it allows it to fit into the bore of the mixer shaft with a clearance functional.
Adaptateur de liaison pour mélangeur sous vide selon la revendication 1 , caractérisé en ce que la partie cylindrique A comporte deux secteurs C et D diamétralement opposés formant chacun une rainure circulaire horizontale apte à recevoir la goupille d'entraînement de l'axe d'entraînement du mélangeur Vacuum mixer connection adapter according to claim 1, characterized in that the cylindrical portion A has two diametrically opposite sectors C and D each forming a horizontal circular groove adapted to receive the driving pin of the drive shaft of the mixer
Adaptateur de liaison pour mélangeur sous vide selon la revendication 1 , caractérisé en ce que la partie cylindrique A comporte deux secteurs circulaires E et F diamétralement opposés aptes à maintenir verticalement l'adaptateur sur la goupille de l'axe d'entraînement du mélangeur. Vacuum mixer connection adapter according to claim 1, characterized in that the cylindrical portion A has two circular sectors E and F diametrically opposite adapted to maintain the adapter vertically on the pin of the drive shaft of the mixer.
Adaptateur de liaison pour mélangeur sous vide selon la revendication 1 , caractérisé en ce que la partie cylindrique A comporte une rainure G verticale séparant axialement les quatre secteurs C / D et E / F et aptes à permettre le passage de la goupille de l'axe du mélangeur entre ces secteurs. Connection adapter for vacuum mixer according to claim 1, characterized in that the cylindrical portion A has a vertical groove G axially separating the four sectors C / D and E / F and adapted to allow the passage of the pin axis blender between these sectors.
Adaptateur de liaison pour mélangeur sous vide selon la revendication 1 , caractérisé en ce que la partie cylindrique B comporte un alésage H dont le diamètre lui permet de recevoir l'axe du bol de mélange avec un jeu fonctionnel. Vacuum mixer connection adapter according to claim 1, characterized in that the cylindrical portion B has a bore H whose diameter allows it to receive the axis of the mixing bowl with a functional clearance.
Adaptateur de liaison pour mélangeur sous vide selon l'une des revendications 1 à 6, caractérisé en ce que l'alésage H comporte une gorge axiale cylindrique I ayant une profondeur portant le diamètre de fond de gorge égal au diamètre extérieur d'une pièce annulaire J. 8- Adaptateur de liaison pour mélangeur sous vide selon l'une des revendications 1 à 6, caractérisé en ce que l'alésage H comporte deux perçages K et L diamétralement opposés aptes à recevoir et maintenir une goupille M traversant l'alésage H de l'adaptateur. Vacuum mixer connection adapter according to one of Claims 1 to 6, characterized in that the bore H has a cylindrical axial groove I having a depth with the groove bottom diameter equal to the outside diameter of an annular piece. J. 8- vacuum mixer connection adapter according to one of claims 1 to 6, characterized in that the bore H comprises two diametrically opposed holes K and L adapted to receive and maintain a pin M through the bore H of the 'adapter.
PCT/FR2016/050930 2015-04-24 2016-04-21 Connection adapter for a vacuum mixer WO2016170275A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1500889A FR3035338B1 (en) 2015-04-24 2015-04-24 CONNECTION ADAPTER FOR VACUUM MIXER
FR1500889 2015-04-24

Publications (1)

Publication Number Publication Date
WO2016170275A1 true WO2016170275A1 (en) 2016-10-27

Family

ID=55486705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2016/050930 WO2016170275A1 (en) 2015-04-24 2016-04-21 Connection adapter for a vacuum mixer

Country Status (2)

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FR (1) FR3035338B1 (en)
WO (1) WO2016170275A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4015857A1 (en) * 2020-12-15 2022-06-22 Siemens Healthcare Diagnostics Products GmbH Device for reversibly connecting a mixing tool to a mixer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777177A (en) * 1951-11-09 1957-01-15 Edmund A Steinbock Investment mixer
US3139270A (en) * 1960-10-13 1964-06-30 Whip Mix Corp Power mixer
US3358971A (en) * 1965-06-21 1967-12-19 Whip Mix Corp Investment mixer
WO1998040157A1 (en) * 1997-03-12 1998-09-17 Mamec Oy Mixer for container
US20090168594A1 (en) * 2007-12-27 2009-07-02 Viking Range Corporation Accessory socket assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777177A (en) * 1951-11-09 1957-01-15 Edmund A Steinbock Investment mixer
US3139270A (en) * 1960-10-13 1964-06-30 Whip Mix Corp Power mixer
US3358971A (en) * 1965-06-21 1967-12-19 Whip Mix Corp Investment mixer
WO1998040157A1 (en) * 1997-03-12 1998-09-17 Mamec Oy Mixer for container
US20090168594A1 (en) * 2007-12-27 2009-07-02 Viking Range Corporation Accessory socket assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4015857A1 (en) * 2020-12-15 2022-06-22 Siemens Healthcare Diagnostics Products GmbH Device for reversibly connecting a mixing tool to a mixer

Also Published As

Publication number Publication date
FR3035338B1 (en) 2017-12-29
FR3035338A1 (en) 2016-10-28

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