EP0916453B1 - Dust extracting device for hand tool - Google Patents
Dust extracting device for hand tool Download PDFInfo
- Publication number
- EP0916453B1 EP0916453B1 EP98810948A EP98810948A EP0916453B1 EP 0916453 B1 EP0916453 B1 EP 0916453B1 EP 98810948 A EP98810948 A EP 98810948A EP 98810948 A EP98810948 A EP 98810948A EP 0916453 B1 EP0916453 B1 EP 0916453B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slots
- extracting device
- screen
- dust extracting
- housing
- 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
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Classifications
-
- 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
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
-
- 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
Definitions
- the invention relates to a suction device, in particular for plate-like tools having handheld devices, according to the preamble of claim 1.
- a such a device is known from US 4,099,328 A.
- a suction device from the processing point is suctioned off and fed to a collecting container.
- a handheld device in the form of an angle grinder is known for example from FR 27 12 835.
- the Suction device of this angle grinder has a peripheral area of a plate-like Tool in the form of a grinding wheel surrounding, hood-shaped Housing, which is fixed to the device housing of the angle grinder.
- the housing is with a screening curtain provided that projects beyond the housing and the interior of the housing seals against the external environment in such a way that a negative pressure in the interior can be generated by means of a device for generating a negative pressure.
- the Shielding curtain is made from a strip of flexible, elastic material formed.
- the device for generating a negative pressure The amount of air discharged from the housing through an outlet opening is transferred via a Intake cross section sucked from the outside into the interior of the housing.
- the Intake cross section is from an annular space between the curtain and the underground that arises when one is not worn out The grinding wheel rests on the surface.
- a suction device for a device with a tool is in the form of US Pat. No. 4,099,328 a bristle grinder known, with the material applied to a surface can be removed.
- the suction device has a back and the circumference of the tool surrounding housing, which with a device for generating a Vacuum is connectable.
- the housing is supported on the by three spring elements Device off and has on one side facing the ground four wheels, with their Help the suction device and all the device along the surface of the working surface is displaceable.
- the tool attached to the device is surrounded by a rubber curtain standing on the ground, the is attached to the suction device and several evenly distributed around the circumference Arranged slots that the free end of the curtain in several spaced apart sections. The clear width of these slots is like this dimensioned that all the air drawn in through these slots into the housing of the Suction device can flow.
- the invention has for its object to provide a suction device whose Shielding curtain is not prone to wear and is of sufficient size Intake cross-section guaranteed.
- a suction device which has the features of claim 1.
- the Slots divide the free end of the curtain into several side by side arranged sections, which are dependent on the through the intake cross section Bend the amount of air flowing into the housing towards the inside of the housing and in this way ensure a sufficient size of the intake cross section.
- a constant width of the slots or a constant distance between the individual sections in the circumferential extent of the shielding curtain is reached by the width of the slots measured in circumferential extent increases towards the free end of the curtain.
- the width of the slots can be for example, increase by the individual sections in the transition area from the Slots are rounded to the free end of the sections, the radius of the Rounding corresponds at most to the length of the slots.
- the extent of the individual sections in the circumferential extent of the screening curtain can for example also towards the free end of the sections rejuvenate. In this way, there are slits that extend to the free end of the Extend sections conically.
- the slots preferably run essentially normal to the circumference of the curtain.
- the sections can be bent more easily, expediently they extend the slots at least partially over the entire height of the curtain.
- the width of the slots or the circumferential extent of the Shielding curtain extending distance between the individual sections is preferably the smallest width measured in the circumferential extent of the screening curtain Slots 0 to 3 mm.
- the sections of the screening curtain are subject to a while Underground of a constant movement. So that this movement of the sections does not increase tearing of the shielding curtain in the attachment area of the slots preferably the slots in radial openings of the screening curtain, the Diameter exceeds the width of the slots in the mouth area.
- the Shielding curtain is formed from an elastomer.
- the invention is based on a drawing, the suction device according to the invention reproduces described in more detail.
- the angle grinder 1 which is only hinted at in the drawing, has one arranged in a device housing 11 drive motor, the rotational movement outputs on an output shaft 12 via an angular gear.
- the drive motor and that Angular gears are not shown.
- On the free, protruding from the device housing 11 The end region of the output shaft 12 is a plate-like tool 4 in the form of a Fixed grinding wheel, which performs a rotating movement on a surface U. and removes small particles from the underground U.
- a suction device that the Covering grinding wheel, arranged substantially coaxially to the grinding wheel hood-shaped housing 2 and a screening curtain 3.
- the housing 2 Starting from the fastening area of the housing 2 in the area of the angular gear the housing 2 widens conically up to its machining direction side, free end opposite the attachment area.
- the housing 2 In the area of conical Enlargement, the housing 2 is provided with an outlet opening 21 which opens into one the outside of the housing 2 arranged mounting neck 22 opens.
- This Fastening nozzle 22 is with a device, not shown, for generating a Vacuum in the processing area of the grinding wheel, or in the interior of the Housing 2 and with a collecting container, not shown, for the from the underground U removed particles can be connected.
- the device for generating a negative pressure is, for example, an external suction device with a Hose line, which can be fixed on the attachment piece 22.
- the shielding curtain 3 has a fastening area projecting into the housing 2 and is made of a strip-shaped elastomer part bent into a ring educated.
- the two clamping rings 5, 6 have a height H extending parallel to the longitudinal axis of the housing 2.
- the shielding curtain 3 has a plurality of slots 31 which are essentially parallel extend to the longitudinal axis of the housing 2 and to the free end of the screening curtain 3 are open. Through these slots 31 becomes part of the curtain 3 in several in a circumferential extent of the shielding curtain 3 in a row arranged, elastic sections 33 divided.
- the sections 33 can be of one Air flow running in the direction of the arrow, for example from an external Device for generating a vacuum is easily generated to the interior of the Bend housing 2 towards.
- the slots 31 open into radially extending through openings 32, whose diameter is 0.2mm to 5mm.
- the shielding curtain 3 formed from an elastomer part has a thickness S of 0.2mm to 3mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
- Manipulator (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- External Artificial Organs (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
- Cleaning In General (AREA)
Abstract
Description
Die Erfindung betrifft eine Absaugvorrichtung, insbesondere für tellerartige Werkzeuge aufweisende Handgeräte, gemäss dem Oberbegriff des Patentanspruchs 1. Eine solche Vorrichtung ist aus US 4 099 328 A bekannt.The invention relates to a suction device, in particular for plate-like tools having handheld devices, according to the preamble of claim 1. A such a device is known from US 4,099,328 A.
Bei der Bearbeitung von Untergründen, insbesondere durch Schleifen entsteht Staub, der bei bekannten Handgeräten mittels einer Absaugvorrichtung von der Bearbeitungsstelle abgesaugt und einem Sammelbehältnis zugeführt wird. Ein derartiges Handgerät in Form eines Winkelschleifers ist beispielsweise aus der FR 27 12 835 bekannt. Die Absaugvorrichtung dieses Winkelschleifers weist ein den Umfangsbereich eines tellerartigen Werkzeuges in Form einer Schleifscheibe umgebendes, haubenförmiges Gehäuse auf, das fest an dem Gerätegehäuse des Winkelschleifers angeordnet ist.When working on substrates, especially by grinding, dust is generated, that in known hand-held devices by means of a suction device from the processing point is suctioned off and fed to a collecting container. Such a handheld device in the form of an angle grinder is known for example from FR 27 12 835. The Suction device of this angle grinder has a peripheral area of a plate-like Tool in the form of a grinding wheel surrounding, hood-shaped Housing, which is fixed to the device housing of the angle grinder.
Am bearbeitungsrichtungsseitigen freien Ende ist das Gehäuse mit einem Abschirmvorhang versehen, der das Gehäuse überragt und den Innenraum des Gehäuses gegenüber der äusseren Umgebung derart abdichtet, dass ein Unterdruck im Innenraum mittels einer Vorrichtung zur Erzeugung eines Unterdruckes erzeugt werden kann. Der Abschirmvorhang wird von einem zu einem Ring gebogenen Streifen aus nachgiebigem, elastischen Material gebildet. Die von der Vorrichtung zur Erzeugung eines Unterdruckes aus dem Gehäuse durch eine Austrittsöffnung abgeführte Luftmenge wird über einen Ansaugquerschnitt von aussen in den Innenraum des Gehäuses angesaugt. Der Ansaugquerschnitt wird von einem ringförmigen Zwischenraum zwischen dem Abschirmvorhang und dem Untergrund gebildet, der entsteht wenn eine nicht verschlissene Schleifscheibe auf dem Untergrund aufliegt.At the processing end on the free end, the housing is with a screening curtain provided that projects beyond the housing and the interior of the housing seals against the external environment in such a way that a negative pressure in the interior can be generated by means of a device for generating a negative pressure. The Shielding curtain is made from a strip of flexible, elastic material formed. The device for generating a negative pressure The amount of air discharged from the housing through an outlet opening is transferred via a Intake cross section sucked from the outside into the interior of the housing. The Intake cross section is from an annular space between the curtain and the underground that arises when one is not worn out The grinding wheel rests on the surface.
Bei der Bearbeitung des Untergrundes nützt sich die Schleifscheibe ab und der Abschirmvorhang kommt mit dem Untergrund in Berührung. Dadurch wird der Ansaugquerschnitt zunehmend kleiner und der Abschirmvorhang einem Verschleiss unterworfen. Die Abnahme des Ansaugquerschnittes führt zu einer Zunahme des Unterdruckes im Innenraum des Gehäuses, so dass sich das Gehäuse immer stärker am Untergrund festsaugt. Die Schleifscheibe wird dadurch fester gegen der Untergrund gedrückt mit dem Resultat, dass diese schneller verschleisst, dass sich die Schleifscheiben nicht mehr gut über den Untergrund führen lassen und dass die Belastung eines Antriebsmotors des Winkelschleifers stark zunimmt.When working on the surface, the grinding wheel wears off Shielding curtain comes into contact with the ground. This will make the Intake cross section increasingly smaller and the shielding curtain is subject to wear subjected. The decrease in the intake cross section leads to an increase in the vacuum inside the case, so that the case becomes more and more Soaks up underground. The grinding wheel becomes firmer against the surface with the result that it wears out faster, that the Do not allow grinding wheels to run well over the surface and that the Load on a drive motor of the angle grinder increases sharply.
Aus der US 4 099 328 ist eine Absaugvorrichtung für ein Gerät mit einem Werkzeug in Form eines Borstenschleifers bekannt, mit dem auf einem Untergrund aufgetragenes Material abgetragen werden kann. Die Absaugvorrichtung weist ein die Rückseite und den Umfang des Werkzeugs umgebendes Gehäuse auf, das mit einer Vorrichtung zur Erzeugung eines Unterdruckes verbindbar ist. Das Gehäuse stützt sich über drei Federelemente an dem Gerät ab und weist an einer dem Untergrund zugewandten Seite vier Räder auf, mit deren Hilfe die Absaugvorrichtung und das ganze Gerät entlang der Oberfläche des zu bearbeitenden Untergrundes verschiebbar ist. Das an dem Gerät befestigte Werkzeug ist von einem auf dem Untergrund aufstehenden Abschirmvorhang aus Gummi umgeben, der an der Absauvorrichtung befestigt ist und mehrere gleichmässig am Umfang verteilt angeordnete Schlitze aufweist, die das freie Ende des Abschirmvorhanges in mehrere voneinander beabstandete Abschnitte unterteilt. Die lichte Weite dieser Schlitze ist so bemessen, dass die gesamte angesaugte Luft durch diese Schlitze in das Gehäuse der Absaugvorrichtung einströmen kann.A suction device for a device with a tool is in the form of US Pat. No. 4,099,328 a bristle grinder known, with the material applied to a surface can be removed. The suction device has a back and the circumference of the tool surrounding housing, which with a device for generating a Vacuum is connectable. The housing is supported on the by three spring elements Device off and has on one side facing the ground four wheels, with their Help the suction device and all the device along the surface of the working surface is displaceable. The tool attached to the device is surrounded by a rubber curtain standing on the ground, the is attached to the suction device and several evenly distributed around the circumference Arranged slots that the free end of the curtain in several spaced apart sections. The clear width of these slots is like this dimensioned that all the air drawn in through these slots into the housing of the Suction device can flow.
Der Erfindung liegt die Aufgabe zugrunde, eine Absaugvorrichtung zu schaffen, deren Abschirmvorhang verschleissunanfällig ist und eine ausreichende Grösse des Ansaugquerschnittes gewährleistet.The invention has for its object to provide a suction device whose Shielding curtain is not prone to wear and is of sufficient size Intake cross-section guaranteed.
Die Lösung dieser Aufgabe erfolgt durch eine Absaugvorrichtung, welche die Merkmale des Patentanspruchs 1 aufweist. Die Schlitze unterteilen das freie Ende des Abschirmvorhanges in mehrere nebeneinander angeordnete Abschnitte, die sich in Abhängigkeit von der durch den Ansaugquerschnitt in das Gehäuse einströmenden Luftmenge zur Innenseite des Gehäuses hin umbiegen und auf diese Weise eine ausreichende Grösse des Ansaugquerschnittes gewährleisten.This problem is solved by a suction device, which has the features of claim 1. The Slots divide the free end of the curtain into several side by side arranged sections, which are dependent on the through the intake cross section Bend the amount of air flowing into the housing towards the inside of the housing and in this way ensure a sufficient size of the intake cross section.
Eine konstante Breite der Schlitze bzw. einen konstanten Abstand zwischen den einzelnen Abschnitten in Umfangserstreckung des Abschirmvorhanges wird erreicht indem die in Umfangserstreckung gemessene Breite der Schlitze zum freien Ende des Abschirmvorhanges hin zunimmt. Die Breite der Schlitze kann beispielsweise zunehmen, indem die einzelnen Abschnitte im Übergangsbereich von den Schlitzen zum freien Ende der Abschnitte abgerundet sind, wobei der Radius der Abrundung höchstens der Länge des Schlitze entspricht.A constant width of the slots or a constant distance between the individual sections in the circumferential extent of the shielding curtain is reached by the width of the slots measured in circumferential extent increases towards the free end of the curtain. The width of the slots can be for example, increase by the individual sections in the transition area from the Slots are rounded to the free end of the sections, the radius of the Rounding corresponds at most to the length of the slots.
Die Erstreckung der einzelnen Abschnitte in Umfangserstreckung des Abschirmvorhanges kann sich beispielsweise aber auch zum freien Ende der Abschnitte hin verjüngen. Auf diese Weise ergeben sich Schlitze, die sich zum freien Ende der Abschnitte hin konisch erweitern.The extent of the individual sections in the circumferential extent of the screening curtain can for example also towards the free end of the sections rejuvenate. In this way, there are slits that extend to the free end of the Extend sections conically.
Aus herstelltechnischen Gründen verlaufen vorzugsweise die Schlitze im wesentlichen normal zur Umfangserstreckung des Abschirmvorhanges.For technical reasons, the slots preferably run essentially normal to the circumference of the curtain.
Damit sich die Abschnitte leichter umbiegen lassen, erstrecken sich zweckmässigerweise die Schlitze wenigstens teilweise über die gesamte Höhe des Abschirmvorhanges.In order that the sections can be bent more easily, expediently they extend the slots at least partially over the entire height of the curtain.
Damit die angesaugte Luft gleichmässig über den Umfang des Abschirmvorhanges verteilt in das Gehäuse einströmen kann, sind vorzugsweise 1 bis 50 Schlitze gleichmässig über den Umfang des Abschirmvorhanges verteilt angeordnet. So that the intake air is evenly distributed over the circumference of the screening curtain can flow into the housing, preferably 1 to 50 slots are uniform distributed over the circumference of the curtain.
Wenn sich die einzelnen Abschnitte zur Innenseite des Gehäuses hin umbiegen, dann verringert sich die Breite der Schlitze bzw. der in Umfangserstreckung des Abschirmvorhanges erstreckende Abstand zwischen den einzelnen Abschnitten. Damit sich die Abschnitte beim Umbiegen nicht gegenseitig behindern, beträgt vorzugsweise die geringste, in Umfangserstreckung des Abschirmvorhanges gemessene Breite der Schlitze 0 bis 3 mm.If the individual sections bend towards the inside of the housing, then the width of the slots or the circumferential extent of the Shielding curtain extending distance between the individual sections. In order to the sections do not interfere with each other when bending, is preferably the smallest width measured in the circumferential extent of the screening curtain Slots 0 to 3 mm.
Die Abschnitte des Abschirmvorhanges unterliegen während der Bearbeitung eines Untergrundes einer ständigen Bewegung. Damit diese Bewegung der Abschnitte nicht zu einem Einreissen des Abschirmvorhanges im Ansatzbereich der Schlitze führt, münden vorzugsweise die Schlitze in radiale Durchtrittsöffnungen des Abschirmvorhanges, deren Durchmesser die Breite der Schlitze im Mündungsbereich überragt.The sections of the screening curtain are subject to a while Underground of a constant movement. So that this movement of the sections does not increase tearing of the shielding curtain in the attachment area of the slots preferably the slots in radial openings of the screening curtain, the Diameter exceeds the width of the slots in the mouth area.
Damit der Übergangsbereich zwischen den einzelnen Abschnitten und dem restlichen Teil des Abschirmvorhanges nicht geschwächt wird, beträgt zweckmässigerweise der Durchmesser der radialen Durchtrittsöffnungen 0,2 mm bis 5 mm. Der Durchmesser der Durchtrittsöffnungen ist grösser alw die Breite eines Schlitze.So that the transition area between the individual sections and the rest Part of the curtain is not weakened, it is expedient to Diameter of the radial passage openings 0.2 mm to 5 mm. The diameter of the Through openings are larger than the width of a slot.
Ein gutes elastisches Verhalten der Abschnitte wird erreicht, indem vorteilhafterweise der Abschirmvorhang aus einem Elastomer gebildet ist.A good elastic behavior of the sections is achieved by advantageously the Shielding curtain is formed from an elastomer.
Die Erfindung wird anhand von einer Zeichnung, die eine erfindungsgemässe Absaugvorrichtung wiedergibt näher beschrieben.The invention is based on a drawing, the suction device according to the invention reproduces described in more detail.
Das in der Zeichnung nur andeutungsweise dargestellte Winkelschleifgerät 1 weist einen
in einem Gerätegehäuse 11 angeordneten Antriebsmotor auf, der seine Drehbewegung
über ein Winkelgetriebe auf eine Abtriebswelle 12 abgibt. Der Antriebsmotor und das
Winkelgetriebe sind nicht dargestellt. Am freien, aus dem Gerätegehäuse 11 herausragenden
Endbereich der Abtriebswelle 12 ist ein tellerartiges Werkzeug 4 in Form einer
Schleifscheibe befestigt, die auf einem Untergrund U eine drehende Bewegung ausführt
und dabei kleine Partikel vom Untergrund U abträgt. Im Bereich des Winkelgetriebes ist
am Gerätegehäuse 11 des Winkelschleifers eine Absaugvorrichtung befestigt, die ein die
Schleifscheibe überdeckendes, im wesentlichen koaxial zur Schleifscheibe angeordnetes
haubenförmiges Gehäuse 2 und einen Abschirmvorhang 3 aufweist.The angle grinder 1, which is only hinted at in the drawing, has one
arranged in a
Ausgehend vom Befestigungsbereich des Gehäuses 2 im Bereich des Winkelgetriebes
erweitert sich das Gehäuse 2 konisch bis zu seinem bearbeitungsrichtungsseitigen,
freien Ende hin, das dem Befestigungsbereich gegenüberliegt. Im Bereich der konischen
Erweiterung ist das Gehäuse 2 mit einer Austrittsöffnung 21 versehen, die in einen auf
der Aussenseite des Gehäuses 2 angeordneten Befestigungsstutzen 22 mündet. Dieser
Befestigungsstutzen 22 ist mit einer nicht dargestellten Vorrichtung zur Erzeugung eines
Unterdruckes im Bearbeitungsbereich der Schleifscheibe, bzw. im Innenraum des
Gehäuses 2 und mit einem nicht dargestellten Sammelbehältnis für die vom Untergrund
U abgetragenen Partikel in Verbindung bringbar. Bei der Vorrichtung zur Erzeugung
eines Unterdruckes handelt es sich beispielsweise um ein externes Sauggerät, mit einer
Schlauchleitung, die am Befestigungsstutzen 22 festlegbar ist.Starting from the fastening area of the housing 2 in the area of the angular gear
the housing 2 widens conically up to its machining direction side,
free end opposite the attachment area. In the area of conical
Enlargement, the housing 2 is provided with an outlet opening 21 which opens into one
the outside of the housing 2 arranged mounting
Der Abschirmvorhang 3 weist einen in das Gehäuse 2 ragenden Befestigungsbereich auf und wird von einem streifenförmigen, zu einem Ring gebogenen Elastomerteil gebildet. Mittels ineinandersteckbarer Klemmringe 5, 6 und schraubenförmigen Befestigungselementen 7 ist der Befestigungsbereich des Abschirmvorhanges 3 im Bereich des freien Endes des Gehäuses 2 festlegbar. Die beiden Klemmringe 5, 6 weisen eine parallel zur Längsachse des Gehäuses 2 erstreckende Höhe H auf.The shielding curtain 3 has a fastening area projecting into the housing 2 and is made of a strip-shaped elastomer part bent into a ring educated. By means of interlocking clamping rings 5, 6 and helical Fastening elements 7 is the fastening area of the shielding curtain 3 in Area of the free end of the housing 2 can be determined. The two clamping rings 5, 6 have a height H extending parallel to the longitudinal axis of the housing 2.
Der Abschirmvorhang 3 weist mehrere Schlitze 31 auf, die sich im wesentlichen parallel
zur Längsachse des Gehäuses 2 erstrecken und zum freien Ende des Abschirmvorhanges
3 hin offen sind. Durch diese Schlitze 31 wird ein Teil des Abschirmvorhanges
3 in mehrere in Umfangserstreckung des Abschirmvorhanges 3 hintereinander
angeordnete, elastische Abschnitte 33 unterteilt. Die Abschnitte 33 lassen sich von einer
in Pfeilrichtung verlaufenden Luftströmung, die beispielsweise von einer externen
Vorrichtung zur Erzeugung eines Unterdruckes erzeugt wird, leicht zum Innenraum des
Gehäuses 2 hin umbiegen. Die Schlitze 31 münden in radial verlaufende Durchtrittsöffnungen
32, deren Durchmesser 0,2mm bis 5mm beträgt.The shielding curtain 3 has a plurality of
Der aus einem Elastormerteil gebildete Abschirmvorhang 3 weist eine Stärke S von 0,2mm bis 3mm auf.The shielding curtain 3 formed from an elastomer part has a thickness S of 0.2mm to 3mm.
Claims (8)
- Dust extracting device, in particular for hand tools (1) using discshaped tools, comprising a hoodlike housing (2), which surrounds the rear side and partially the periphery of the tools (4) and which is connectable to a device for generating a negative pressure, and a screen (3) of resilient material which extends over the periphery of the free end side and axially protrudes over the latter and includes a plurality of slots (31), which are spaced along the peripheral extent and are open towards the free end, characterised in that the width of the slots (31), as measured in the peripheral extent, increases towards the free end of the screen (3).
- Dust extracting device according to Claim 1, characterised in that the slots (31) extend substantially normally to the peripheral extent of the screen (3).
- Dust extracting device according to Claim 1 or 3, characterised in that the slots (31) extend at least partially over the full height of the screen (3).
- Dust extracting device according to one of Claims 1 to 3, characterised in that between 1 and 50 slots (31) are evenly spaced over the periphery of the screen (3).
- Dust extracting device according to Claim 4, characterised in that the narrowest width of the slots (31), as measured in the peripheral extent of the screen (3), lies between 0 and 3 mm.
- Dust extracting device according to Claim 5, characterised in that the slots (31) terminate in radial passages (32) of the screen (3) the diameter of which exceeds the width of the slots (31) in the mouth area.
- Dust extracting device according to Claim 6, characterised in that the diameter of the radial passages (32) lies between 0.2 mm and 5 mm.
- Dust extracting device according to one of Claims 1 to 7, characterised in that the screen (3) is made of an elastomer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19750283A DE19750283A1 (en) | 1997-11-13 | 1997-11-13 | Suction device for hand-held tool device |
DE19750283 | 1997-11-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0916453A2 EP0916453A2 (en) | 1999-05-19 |
EP0916453A3 EP0916453A3 (en) | 1999-07-14 |
EP0916453B1 true EP0916453B1 (en) | 2002-01-23 |
Family
ID=7848600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810948A Expired - Lifetime EP0916453B1 (en) | 1997-11-13 | 1998-09-22 | Dust extracting device for hand tool |
Country Status (6)
Country | Link |
---|---|
US (1) | US6053806A (en) |
EP (1) | EP0916453B1 (en) |
JP (1) | JPH11216671A (en) |
AT (1) | ATE212273T1 (en) |
DE (2) | DE19750283A1 (en) |
ES (1) | ES2172109T3 (en) |
Families Citing this family (10)
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DE19900928C2 (en) * | 1999-01-13 | 2001-10-31 | Bosch Gmbh Robert | Dust cover for a grinding tool |
DE29923867U1 (en) * | 1999-09-17 | 2001-08-30 | Homag Maschinenbau Ag, 72296 Schopfloch | Processing unit |
DE10162630A1 (en) * | 2001-12-20 | 2003-07-10 | Hilti Ag | Grinder with a suction hood |
US20040154168A1 (en) * | 2003-02-07 | 2004-08-12 | Mcdonald Jon Anthony | Dust and debris shield for powered hand tool |
ATE427186T1 (en) * | 2003-12-08 | 2009-04-15 | Flex Trim As | GRINDING DEVICE |
KR101220750B1 (en) * | 2010-07-06 | 2013-01-09 | 계양전기 주식회사 | Dust Hood Assembly for Adjusting Location Easily and Power Tool with the Same |
US8801506B2 (en) * | 2011-11-28 | 2014-08-12 | X'pole Precision Tools Inc. | Dust collection hood for grinding machine tools |
CN108202282A (en) * | 2016-12-20 | 2018-06-26 | 天津津航技术物理研究所 | A kind of efficient quartzy spherical surface Cowling number control processing method |
EP3705229A1 (en) * | 2019-03-04 | 2020-09-09 | Hilti Aktiengesellschaft | Dust hood extension device and system comprising such a dust hood extension device and an adapter |
CN110450245A (en) * | 2019-06-27 | 2019-11-15 | 安徽尧龙竹木制品有限公司 | A kind of moisture-proof recombination bamboo clappers processing dust guard pollution abatement equipment of high wear-resistance anti-static |
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US1951105A (en) * | 1933-02-03 | 1934-03-13 | American Floor Surfacing Mach | Rotary disk edging machine |
US3172831A (en) * | 1960-06-15 | 1965-03-09 | Anocut Eng Co | Grinding machine |
US3068620A (en) * | 1961-02-06 | 1962-12-18 | Tocci-Guilbert Berne | Safety guard for grinding machine |
US3148488A (en) * | 1961-12-11 | 1964-09-15 | Sun Tool And Machine Company | Coolant splash shield and support |
US3673744A (en) * | 1971-02-12 | 1972-07-04 | Anders Oimoen | Portable grinder |
US4099328A (en) * | 1977-07-20 | 1978-07-11 | Schlemmer John E | Machine for removing floor covering |
DE3742038A1 (en) * | 1987-12-11 | 1989-06-22 | Gerd Braasch | GRINDING BODY FOR THE PROCESSING OF SURFACES, IN PARTICULAR WOOD SURFACES |
US5388305A (en) * | 1993-09-17 | 1995-02-14 | Surtec, Inc. | Vacuum buffer |
FR2712835B3 (en) * | 1993-11-26 | 1995-10-06 | Ko Kent | Abrasive tool with dust collection unit. |
US5411433A (en) * | 1994-06-13 | 1995-05-02 | Dynabrade, Inc. | Dust-collecting apparatus |
US5527207A (en) * | 1994-06-27 | 1996-06-18 | Azar; John C. | Dust collection shroud for hand held power tools |
US5709597A (en) * | 1995-11-21 | 1998-01-20 | Sarantitis; Andreas I. | Pivotal vacuum shield for an abrading device |
US5711051A (en) * | 1996-04-01 | 1998-01-27 | Professional Chemicals Corporation | Hard surface cleaning appliance |
SE507264C2 (en) * | 1996-06-13 | 1998-05-04 | Atlas Copco Tools Ab | Handheld power tool |
US5713785A (en) * | 1997-01-17 | 1998-02-03 | Linax Co., Ltd. | Vacuum type portable sander |
-
1997
- 1997-11-13 DE DE19750283A patent/DE19750283A1/en not_active Withdrawn
-
1998
- 1998-09-22 EP EP98810948A patent/EP0916453B1/en not_active Expired - Lifetime
- 1998-09-22 DE DE59802888T patent/DE59802888D1/en not_active Expired - Lifetime
- 1998-09-22 AT AT98810948T patent/ATE212273T1/en active
- 1998-09-22 ES ES98810948T patent/ES2172109T3/en not_active Expired - Lifetime
- 1998-11-09 US US09/188,879 patent/US6053806A/en not_active Expired - Lifetime
- 1998-11-11 JP JP10320447A patent/JPH11216671A/en active Pending
Also Published As
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ATE212273T1 (en) | 2002-02-15 |
JPH11216671A (en) | 1999-08-10 |
EP0916453A2 (en) | 1999-05-19 |
US6053806A (en) | 2000-04-25 |
DE19750283A1 (en) | 1999-05-20 |
ES2172109T3 (en) | 2002-09-16 |
DE59802888D1 (en) | 2002-03-14 |
EP0916453A3 (en) | 1999-07-14 |
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