EP3047940A1 - Device for suctioning off grinding dust on rotation grinders - Google Patents

Device for suctioning off grinding dust on rotation grinders Download PDF

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Publication number
EP3047940A1
EP3047940A1 EP15002925.4A EP15002925A EP3047940A1 EP 3047940 A1 EP3047940 A1 EP 3047940A1 EP 15002925 A EP15002925 A EP 15002925A EP 3047940 A1 EP3047940 A1 EP 3047940A1
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EP
European Patent Office
Prior art keywords
suction
hood
suction hood
secondary air
sealing profile
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.)
Withdrawn
Application number
EP15002925.4A
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German (de)
French (fr)
Inventor
Lothar LÄSSIG
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.)
Elektrowerkzeuge Eibenstock GmbH
Original Assignee
Elektrowerkzeuge Eibenstock GmbH
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Filing date
Publication date
Application filed by Elektrowerkzeuge Eibenstock GmbH filed Critical Elektrowerkzeuge Eibenstock GmbH
Publication of EP3047940A1 publication Critical patent/EP3047940A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/24—Hoses or pipes; Hose or pipe couplings
    • A47L9/242—Hose or pipe couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/182—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings
    • B24B7/184—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings pole sanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools

Definitions

  • the invention relates to a device for extracting grinding dust on rotary grinders, in particular drywall grinders.
  • suction device for grinders with a rotating abrasive which is at least partially surrounded by a suction hood, known in which the suction hood has a peripheral edge with a fixed support edge and a resilient element, the flexible movement of the suction hood substantially parallel to the axis of rotation of the rotating abrasive relative to the grinder permits.
  • the DE202005011659 describes a grinding device, which is a head part, a handle which is pivotally mounted on the head part, at least one rotatably mounted on the head part grinding plate and a drive unit for a hood which covers the at least one sanding pad and surrounds it with its edge, and one on the Hood has provided connection device for a vacuum cleaner.
  • a sliding ring is attached at the edge of the hood replaceable.
  • the at least one sanding pad and the sliding ring are so relative to each other adjustable so that the front edge of the sliding ring and the front of the grinding disc are aligned.
  • a vacuum can be generated by the vacuum cleaner under the hood, which is sufficient to hold the headboard to the wall.
  • the vacuum required for this can certainly be generated by a commercial vacuum cleaner, because since the hood covers the grinding wheel, it has a considerable size, which is co-determining in addition to the achievable negative pressure for the achievable holding force.
  • a disadvantage of all known technical solution is that the housing on the wall or the ceiling, that is sucked on the sanding ground and thus handling is difficult.
  • the object of the invention is to further develop a device for extracting grinding dust on rotary grinders so that the most complete possible extraction of sanding dust and sanding material can be ensured immediately after their formation with a vacuum cleaner, without it sucking the grinder on the ground.
  • this device is based on the illustration 1 and the embodiment will be explained in more detail.
  • the inventive device for extracting grinding dust on rotary grinders consists of a arranged on a suction pipe 6 drive group and a movable grinding head.
  • the drive group and the movable grinding head enclosing a suction hood 1 is arranged, which faces one of the surface to be machined and having around the entire circumference of the suction hood guided sealing profile 2.
  • the suction tube 6 which serves as a carrier element and guide rod for the drive group and movable grinding head, the material to be sanded is transported by the grinding head in the direction of the suction device.
  • a commercial vacuum cleaner is used as a suction device.
  • the volume flow generated by the suction device and guided through the suction pipe 6 can be adjusted by means of a secondary air regulator 5.
  • This secondary air regulator 5 is arranged in the suction pipe 6 and designed so that by means of selbigen secondary air regulator 5, an opening in the suction pipe 6 can be opened or closed.
  • the suction hood 1 of the grinding head is equipped with the sealing profile 2, which rests on the surface to be machined.
  • the sealing profile 2 is designed such that a Schleifgutaustritt in the region of the grinding head is prevented during working, but at the same time good sliding of the grinding head is achieved on the surface to be ground.
  • the suction hood 1 is provided with auxiliary air holes 7.
  • These secondary air holes 7 are preferably arranged continuously from the top of the exhaust hood 1 into the interior of the exhaust hood 1. It has proved to be advantageous if these secondary air holes 7 are distributed as uniform circular ring on the exhaust hood 1.
  • the operator only needs to spend a fraction of the contact force for the grinding process, as the suction head also pulls the grinding head to the surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung zum Absaugen von Schleifstaub an Rotationsschleifern, bestehend aus einer auf einem Absaugrohr (6) angeordneten und die Antriebsgruppe und den beweglichen Schleifkopf umschließende Absaughaube (1), welche ein der zu bearbeitenden Fläche zugewandt und um den gesamten Umfang der Absaughaube (1) geführtes Dichtungsprofil (2) und mindestens einem Nebenluftregler (5), welcher in dem Absaugrohr (6) angeordnet und so ausgeführt ist, dass mittels selbigen Nebenluftreglers (5) eine Öffnung im Absaugrohr (6) reguliert wird, aufweist und die Absaughaube (1) mit mindestens einem Nebenluftloch (7) versehen ist, welches von der Oberseite der Absaughaube (1) her durchgehend bis in den Innenraum der Absaughaube (1) hineinreicht.The invention relates to a device for extracting grinding dust on rotary grinders, comprising a suction hood (1) arranged on a suction tube (6) and enclosing the drive group and the movable grinding head, which face one of the surfaces to be machined and around the entire circumference of the suction hood ( 1) guided sealing profile (2) and at least one secondary air regulator (5) which is arranged in the suction pipe (6) and designed so that by means of self Nebenluftreglers (5) an opening in the suction pipe (6) is regulated, and the exhaust hood ( 1) is provided with at least one secondary air hole (7) which extends from the top of the suction hood (1) forth continuously into the interior of the suction hood (1).

Description

Die Erfindung betrifft eine Vorrichtung zum Absaugen von Schleifstaub an Rotationsschleifern, insbesondere Trockenbauschleifern.The invention relates to a device for extracting grinding dust on rotary grinders, in particular drywall grinders.

Es sind Absaugvorrichtung für Schleifgeräte mit einem rotierenden Schleifmittel, das zumindest teilweise von einer Absaughaube umgeben ist, bekannt, bei welchen die Absaughaube einen Umfangsrand mit fester Auflagekante sowie ein federelastisches Element aufweist, das eine flexible Bewegung der Absaughaube im Wesentlichen parallel zur Rotationsachse des rotierenden Schleifmittels relativ zum Schleifgerät zulässt.There are suction device for grinders with a rotating abrasive, which is at least partially surrounded by a suction hood, known in which the suction hood has a peripheral edge with a fixed support edge and a resilient element, the flexible movement of the suction hood substantially parallel to the axis of rotation of the rotating abrasive relative to the grinder permits.

Solch eine Lösung ist beispielsweise beschrieben in der DE 102008059585 . Indem die Absaughaube einen Umfangsrand aufweist, der mit einer festen Auflagekante ausgebildet ist, soll das Gleitverhalten eines Schleifgeräts mit dieser Absaugvorrichtung auf der zu bearbeitenden Oberfläche deutlich verbessert werden.Such a solution is described for example in US Pat DE 102008059585 , By the suction hood has a peripheral edge which is formed with a solid support edge, the sliding behavior of a grinder with this suction device on the surface to be processed is to be significantly improved.

Auch bekannt ist aus der DE 6933862 eine Vorrichtung zum Absaugen von Schleifstaub an Vorsatzschwingschleifern, bei welcher eine Manschette aus elastischem Kunststoff den Vorsatzschwingschleifer umschließt und von ihr seitlich ein Stutzen zum Anschluss eines Staubsaugerschlauches abführt.Also known is from the DE 6933862 a device for extracting sanding dust on attachment vibrating grinders, in which a sleeve of elastic plastic surrounds the attachment oscillating grinder and discharges from her side a nozzle for connection of a vacuum cleaner hose.

Die DE202005011659 beschreibt ein Schleifgerät, welches ein Kopfteil, einen Stiel, welcher schwenkbar am Kopfteil angebracht ist, wenigstens einen am Kopfteil drehbar gelagerten Schleifteller und ein Antriebsaggregat dafür, eine Haube, welche den wenigstens einen Schleifteller abdeckt und ihn mit seinem Rand umgibt, und eine an der Haube vorgesehene Anschlusseinrichtung für einen Staubsauger aufweist.The DE202005011659 describes a grinding device, which is a head part, a handle which is pivotally mounted on the head part, at least one rotatably mounted on the head part grinding plate and a drive unit for a hood which covers the at least one sanding pad and surrounds it with its edge, and one on the Hood has provided connection device for a vacuum cleaner.

Am Rand der Haube ist auswechselbar ein Gleitring angebracht. Der wenigstens eine Schleifteller und der Gleitring sind relativ zueinander so verstellbar, dass der vordere Rand des Gleitrings und die Vorderseite des Schleiftellers miteinander fluchten.At the edge of the hood replaceable a sliding ring is attached. The at least one sanding pad and the sliding ring are so relative to each other adjustable so that the front edge of the sliding ring and the front of the grinding disc are aligned.

Auf diese Weise lässt sich erreichen, dass dann, wenn der wenigstens eine Schleifteller über die Oberfläche einer Wand oder Decke geführt wird und sie bearbeitet, der Gleitring über die selbe Oberfläche gleitet und dadurch den Spalt zwischen der Haube und der bearbeiteten Oberfläche für den Saugluftstrom weitestgehend oder vollständig verschließt.In this way it can be achieved that, when the at least one sanding pad is guided over the surface of a wall or ceiling and processed, the sliding ring slides over the same surface and thereby largely the gap between the hood and the machined surface for the suction air flow or completely closes.

Dann kann durch den Staubsauger unter der Haube ein Unterdruck erzeugt werden, der ausreicht, um das Kopfteil an der Wand zu halten. Der dafür erforderliche Unterdruck kann durchaus von einem handelsüblichen Staubsauger erzeugt werden, denn da die Haube die Schleifscheibe abdeckt, hat sie eine beträchtliche Größe, die neben dem erzielbaren Unterdruck für die erzielbare Haltekraft mitbestimmend ist.Then, a vacuum can be generated by the vacuum cleaner under the hood, which is sufficient to hold the headboard to the wall. The vacuum required for this can certainly be generated by a commercial vacuum cleaner, because since the hood covers the grinding wheel, it has a considerable size, which is co-determining in addition to the achievable negative pressure for the achievable holding force.

Damit Staub abgesaugt werden kann, muss Luft unter die Haube gesaugt werden können. Da der Gleitring auf einer rauhen Oberfläche, z. B. auf einem Putz, gleitet, und der Gleitring einem Verschleiß ausgesetzt ist, der ihn aufrauht und etwas uneben werden lassen kann, kann trotz des Gleitens des Gleitrings auf der zu bearbeitenden Oberfläche durch den Restspalt zwischen dem Gleitring und der zu bearbeitenden Oberfläche Luft unter die Haube gesaugt werden.To be able to extract dust, air must be able to be sucked under the hood. Since the sliding ring on a rough surface, for. B. on a plaster, slides, and the sliding ring is exposed to wear roughening him and can be slightly uneven, despite the sliding of the sliding ring on the surface to be machined by the residual gap between the sliding ring and the surface to be machined air the hood will be sucked.

Nachteilig bei allen bekannten technischen Lösung ist es, dass sich das Gehäuse an der Wand bzw. der Decke, dass heißt an dem Schleifgrund ansaugt und somit die Handhabung erschwert wird.A disadvantage of all known technical solution is that the housing on the wall or the ceiling, that is sucked on the sanding ground and thus handling is difficult.

Aufgabe der Erfindung ist es, eine Vorrichtung zum Absaugen von Schleifstaub an Rotationsschleifern so weiter zu bilden, dass eine möglichst vollständige Absaugung von Schleifstaub und Schleifgut unmittelbar nach deren Entstehung mit einem Staubsauger sichergestellt werden kann, ohne dass sich dabei der Schleifer am Untergrund festsaugt.The object of the invention is to further develop a device for extracting grinding dust on rotary grinders so that the most complete possible extraction of sanding dust and sanding material can be ensured immediately after their formation with a vacuum cleaner, without it sucking the grinder on the ground.

Erfindungsgemäß wird diese Aufgabe durch eine Vorrichtung gemäß der Schutzansprüche 1 bis 4 gelöst.According to the invention this object is achieved by a device according to the claims 1 to 4.

Nachfolgend soll diese Vorrichtung anhand der Abbildung 1 und dem Ausführungsbeispiel näher erläutert werden.Subsequently, this device is based on the illustration 1 and the embodiment will be explained in more detail.

Die erfindungsgemäße Vorrichtung zum Absaugen von Schleifstaub an Rotationsschleifern besteht aus einer auf einem Absaugrohr 6 angeordneten Antriebsgruppe und einem beweglichen Schleifkopf.The inventive device for extracting grinding dust on rotary grinders consists of a arranged on a suction pipe 6 drive group and a movable grinding head.

Die Antriebsgruppe und den beweglichen Schleifkopf umschließend ist eine Absaughaube 1 angeordnet, welche ein der zu bearbeitenden Fläche zugewandt und um den gesamten Umfang der Absaughaube geführtes Dichtungsprofil 2 aufweist.The drive group and the movable grinding head enclosing a suction hood 1 is arranged, which faces one of the surface to be machined and having around the entire circumference of the suction hood guided sealing profile 2.

Durch das Absaugrohr 6, welches als Trägerelement und Führungsstange für Antriebsgruppe und beweglichen Schleifkopf dient, wird das Schleifgut vom Schleifkopf Richtung Absaugvorrichtung transportiert.Through the suction tube 6, which serves as a carrier element and guide rod for the drive group and movable grinding head, the material to be sanded is transported by the grinding head in the direction of the suction device.

Üblicherweise wird als Absaugvorrichtung ein handelsüblicher Staubsauger eingesetzt.Usually, a commercial vacuum cleaner is used as a suction device.

Der durch die Absaugvorrichtung erzeugte und durch das Absaugrohr 6 geführte Volumenstrom ist mittels eines Nebenluftreglers 5 einstellbar.The volume flow generated by the suction device and guided through the suction pipe 6 can be adjusted by means of a secondary air regulator 5.

Dieser Nebenluftregler 5 ist in dem Absaugrohr 6 angeordnet und so ausgeführt, dass mittels selbigen Nebenluftreglers 5 eine Öffnung im Absaugrohr 6 geöffnet oder geschlossen werden kann.This secondary air regulator 5 is arranged in the suction pipe 6 and designed so that by means of selbigen secondary air regulator 5, an opening in the suction pipe 6 can be opened or closed.

Die Absaughaube 1 des Schleifkopfes ist mit dem Dichtprofil 2 ausgestattet, welches auf der zu bearbeitenden Fläche aufliegt.The suction hood 1 of the grinding head is equipped with the sealing profile 2, which rests on the surface to be machined.

Das Dichtprofil 2 ist derart ausgeführt, dass ein Schleifgutaustritt im Bereich des Schleifkopfes während des Arbeitens verhindert wird, gleichzeitig aber ein gutes Gleiten des Schleifkopfes auf der zu schleifenden Oberfläche erreicht wird.The sealing profile 2 is designed such that a Schleifgutaustritt in the region of the grinding head is prevented during working, but at the same time good sliding of the grinding head is achieved on the surface to be ground.

Als vorteilhaft hat sich dabei erwiesen, das Dichtprofil 2 als Silikonlippe auszuführen.It has proven to be advantageous to perform the sealing profile 2 as a silicone lip.

Um ein komplettes Festsaugen der Absaughaube 1 auf der Werkstückoberfläche bei geschlossenem Nebenluftregler 5 zu verhindern, ist die Absaughaube 1 mit Nebenluftlöchern 7 versehen.In order to prevent a complete firm suction of the suction hood 1 on the workpiece surface with the secondary air regulator 5 closed, the suction hood 1 is provided with auxiliary air holes 7.

Diese Nebenluftlöcher 7 sind vorzugsweise von der Oberseite der Absaughaube 1 her durchgehend bis in den Innenraum der Absaughaube 1 hinein angeordnet.
Als vorteilhaft hat sich erwiesen, wenn diese Nebenluftlöcher 7 als gleichmäßiger Kreisring auf der Absaughaube 1 verteilt.These secondary air holes 7 are preferably arranged continuously from the top of the exhaust hood 1 into the interior of the exhaust hood 1.
It has proved to be advantageous if these secondary air holes 7 are distributed as uniform circular ring on the exhaust hood 1.

Damit wird ein Minimal- Luftstrom sichergestellt, der zum Einen den für eine gute Absaugung notwendigen Luftstrom ermöglicht und zum Anderen das Ansaugen der Absaughaube 1 auf die Oberfläche der zu bearbeitenden Fläche soweit verringert, dass ein problemloses Führen des Werkzeuges auf der zu schleifenden Fläche gewährleistet ist.Thus, a minimum air flow is ensured, on the one hand allows the necessary for a good suction air flow and on the other hand, the suction of the suction hood 1 on the surface of the surface to be machined reduced so much that a smooth guiding of the tool is guaranteed on the surface to be ground ,

Somit ergeben sich für den Luftregler 5 folgende Funktionen:

  • Einstellung der Ansaugkraft für die Absaughaube 1, eigentlich für den ganzen Schleifkopf, und damit eine deutliche Erleichterung für den Bediener, da das Maschinengewicht reduziert wird. Besonders günstig ist dies beispielhaft bei Überkopfarbeiten.
This results in the following functions for the air regulator 5:
  • Setting the suction force for the suction hood 1, actually for the entire grinding head, and thus a significant relief for the operator, since the weight of the machine is reduced. This is particularly favorable as an example in overhead work.

Der Bediener braucht nur noch einen Bruchteil der Anpresskraft für den Schleifvorgang aufzuwenden, da durch die Ansaugung auch der Schleifkopf an die Oberfläche gezogen wird.The operator only needs to spend a fraction of the contact force for the grinding process, as the suction head also pulls the grinding head to the surface.

Mit dem Luftregler ist eine problemlose Anpassung der Luftstromverhältnisse an verschiedene Absaugeinrichtungen, entsprechend der Parameter der verwendeten Staubsauger möglich.With the air regulator is a problem-free adaptation of the air flow conditions to different suction devices, according to the parameters of the vacuum cleaner used possible.

Mit der erfindungsgemäßen Vorrichtung ist es nun möglich, Staubsauger zu verwenden, welche keine eigene Saugkraftregelung aufweisen, wodurch eine weitere Kostenersparnis einhergeht.With the device according to the invention, it is now possible to use vacuum cleaners, which do not have their own suction control, resulting in a further cost savings.

Claims (4)

Vorrichtung zum Absaugen von Schleifstaub an Rotationsschleifern, bestehend aus einer auf einem Absaugrohr (6) angeordneten und die Antriebsgruppe und den beweglichen Schleifkopf umschließende Absaughaube (1), welche ein der zu bearbeitenden Fläche zugewandt und um den gesamten Umfang der Absaughaube (1) geführtes Dichtungsprofil (2) und mindestens einem Nebenluftregler (5), welcher in dem Absaugrohr (6) angeordnet und so ausgeführt ist, dass mittels selbigen Nebenluftreglers (5) eine Öffnung im Absaugrohr (6) reguliert wird, aufweist und die Absaughaube (1) mit mindestens einem Nebenluftloch (7) versehen ist, welches von der Oberseite der Absaughaube (1) her durchgehend bis in den Innenraum der Absaughaube (1) hineinreicht.Device for extracting grinding dust on rotary grinders, comprising a suction hood (1) arranged on a suction pipe (6) and surrounding the drive group and the movable grinding head, which faces one of the surface to be machined and the sealing profile guided around the entire circumference of the suction hood (1) (2) and at least one secondary air regulator (5) which is arranged in the suction pipe (6) and designed so that by means of self Nebenluftreglers (5) an opening in the suction pipe (6) is regulated, and the suction hood (1) with at least a secondary air hole (7) is provided, which extends from the top of the suction hood (1) forth continuously into the interior of the suction hood (1). Vorrichtung nach Anspruch 1, aufweisend ein Dichtprofil (2), welches aus Bürsten gebildet ist.Apparatus according to claim 1, comprising a sealing profile (2), which is formed from brushes. Vorrichtung nach Anspruch 1, aufweisend ein Dichtprofil (2), welches aus einer Silikonlippe gebildet ist.Apparatus according to claim 1, comprising a sealing profile (2), which is formed from a silicone lip. Vorrichtung nach Anspruch 1, bei welcher die Nebenluftlöcher (7) als gleichmäßiger Kreisring auf der Absaughaube (1) verteilt sind.Apparatus according to claim 1, wherein the secondary air holes (7) are distributed as a uniform circular ring on the suction hood (1).
EP15002925.4A 2015-01-22 2015-10-14 Device for suctioning off grinding dust on rotation grinders Withdrawn EP3047940A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201520000409 DE202015000409U1 (en) 2015-01-22 2015-01-22 Device for extracting grinding dust on rotary grinders

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EP3047940A1 true EP3047940A1 (en) 2016-07-27

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EP (1) EP3047940A1 (en)
DE (1) DE202015000409U1 (en)

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US20160213216A1 (en) 2016-07-28

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