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EP3705229A1 - Dispositif d'extension de hotte anti-poussière et système comprenant un tel dispositif d'extension de hotte anti-poussière et adaptateur - Google Patents

Dispositif d'extension de hotte anti-poussière et système comprenant un tel dispositif d'extension de hotte anti-poussière et adaptateur Download PDF

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Publication number
EP3705229A1
EP3705229A1 EP19160445.3A EP19160445A EP3705229A1 EP 3705229 A1 EP3705229 A1 EP 3705229A1 EP 19160445 A EP19160445 A EP 19160445A EP 3705229 A1 EP3705229 A1 EP 3705229A1
Authority
EP
European Patent Office
Prior art keywords
dust hood
adapter
grinding
extension device
dust
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Withdrawn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
EP19160445.3A
Other languages
German (de)
English (en)
Inventor
Lionel Barbier
Matthias Mazur
Paul Fally
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.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Priority to EP19160445.3A priority Critical patent/EP3705229A1/fr
Priority to PCT/EP2020/054869 priority patent/WO2020178072A1/fr
Priority to US17/435,302 priority patent/US12397395B2/en
Priority to EP20705386.9A priority patent/EP3934847B1/fr
Priority to CN202080011180.7A priority patent/CN113382823A/zh
Publication of EP3705229A1 publication Critical patent/EP3705229A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the present invention relates to a dust hood extension device for use in connection with a dust hood for a grinding device, as well as a system comprising such a dust hood extension device and an adapter.
  • the dust hood extension device is particularly characterized in that an opening of the device is arranged eccentrically with respect to the central axis of the drive shaft.
  • hand-held electrical devices are known in the prior art, for example grinding devices such as angle grinders. These usually have an insert tool that can preferably be designed as an abrasive.
  • the abrasive is usually matched to the surface to be processed and can, for example, be a cup wheel, which has segments with a diamond matrix, for example.
  • dust is formed which in many cases can be hazardous to health and / or toxic to people, in particular the operator of the sanding device. In particular, the dust produced during grinding should not be inhaled and get into the respiratory tract of the operator of the grinding device.
  • dust hoods are known in the prior art, which can be arranged around the grinding means and are set up to catch or take up the dust generated during grinding.
  • Conventional dust hoods are used to prevent dust from spreading during grinding work in order to protect the health of a user of the grinding device.
  • Such conventional dust hoods can preferably be connected to a vacuum cleaner, such as a vacuum cleaner or a dust extractor, the vacuum cleaner generating an air flow by generating a negative pressure with which the dust can be sucked out of the area of the dust hood.
  • the dust hoods known in the prior art deliver good dust removal results in particular when the corresponding grinding devices to which the dust hoods are connected are used for processing flat surfaces.
  • good suction performance is achieved with regard to that which occurs during grinding work Dust is reached when the dust hood lies flat on the surface to be processed.
  • an opening of the dust hood rests essentially completely on the surface on which the dust arises, so that the dust can be optimally captured with the dust hood and vacuumed with the vacuum cleaner.
  • the dust hoods known in the prior art can only absorb and divert a small proportion of the dust produced when the surface to be sanded is smaller than the diameter of the dust hood, which usually has an essentially circular base area.
  • This disadvantage of conventional dust hoods becomes apparent in particular when bevels are to be created or ground, since the bevels are usually made much narrower than the diameter of a dust hood. If a bevel is to be ground or produced by grinding, a conventional dust hood usually no longer covers a sufficiently large portion of the surface to be processed to ensure effective suction of the dust that is produced. Solutions are known in the prior art for collecting the dust that is created when grinding bevels.
  • the proposed cuboid devices also often have an unwieldy, bulky shape, so that they are difficult to operate, especially for small operators with possibly low physical strength. Furthermore, the proposed solutions do not allow a simple change between the grinding of edges, bevels and / or (flat) surfaces, since the cuboid devices usually comprise an essentially rectangular recess, which allows the production of bevels, but not the processing of smooth and enables flat surfaces. The practically complete encasing of the grinding area is also a easy changing of the abrasive not possible. A height adjustment is only possible through the complex and laborious screwing on of connecting means, such as wing nuts.
  • the opening of the cuboid device proposed in the prior art for receiving the dust produced during grinding is arranged centrally with respect to a central or rotational axis of the drive shaft of the grinding device, which often leads to tilting of the system and sub-optimal grinding results.
  • the contact surface of the abrasive on the surface of a bevel to be ground is usually significantly smaller than the surface of the abrasive itself, so that large amounts of the dust produced can escape upwards and downwards.
  • the dust particles that are released remain in the dust hood in order to be sucked off or removed from the area of the dust hood with the aid of a vacuum cleaner.
  • the object of the present invention to overcome the disadvantages of conventional dust hoods described above and to provide an extension device for a dust hood which offers improved suction behavior for the dust produced during grinding work, in particular when chamfers are to be produced with the grinding device.
  • the device to be provided should enable simple handling and easy replacement of the grinding means of the grinding device.
  • the expansion device to be provided would ensure a simple change between the processing of flat surfaces and the grinding of bevels and edges, could be easily adjusted in height and would not tend to tilt.
  • a dust hood extension device for use in conjunction with a dust hood for a grinding device, the grinding device comprising a drive shaft for driving a grinding medium, the grinding medium rotating in operation with rotational symmetry about a central axis of the drive shaft.
  • the dust hood extension device is characterized in that it comprises a carrying device and an opening, the carrying device being set up to enclose the dust hood and, if necessary absorb emerging dust particles, the opening being arranged eccentrically with respect to the central axis of the drive shaft.
  • the invention provides a technical solution which advantageously enables the user to produce or regrind chamfers with particularly little dust.
  • the proposed dust hood extension device can be used to switch between the different sanding cases in a simple, quick and uncomplicated manner.
  • the term "sanding cases" preferably denotes the different sanding situations, such as the sanding of (flat) surfaces or the creation of bevels, i.e. working on angular workplaces.
  • the advantageous shape of the carrying device enables a material-saving production of the proposed dust hood extension device. This advantageously results in a low weight of the device and thus easier handling of the proposed dust hood extension device in comparison to conventional solutions.
  • the grinding means of the grinding device comprises a segment ring which is preferably arranged around the axis of rotation.
  • the segment ring preferably comprises individual grinding segments which together form an annular device as a segment ring.
  • these grinding segments are preferably also referred to as rotation segments.
  • the segment ring has an inner spacing from the axis of rotation in an area facing the axis of rotation and an outer spacing from the axis of rotation in an area facing away from the axis of rotation.
  • the carrying device of the dust hood extension device has an opening, this opening of the carrying device being arranged eccentrically.
  • eccentric arrangement in relation to the axis of rotation preferably means in the context of the invention that the opening is arranged, for example, above the rotation segments or above the segment ring.
  • the eccentric arrangement of the opening of the dust hood extension device or the carrying device is particularly advantageous since the dust produced during grinding can be sucked out of the dust hood directly at its point of origin in the area of the rotating segments if the dust hood is connected to a vacuum cleaner.
  • the carrying device assists that essentially the full vacuum suction flow generated by the vacuum cleaner device passes through the opening of the dust hood extension device or the carrying device is passed. As a result, an improved suction of the dust arising in the entire area of the abrasive can advantageously be achieved.
  • the opening of the dust hood extension device or the base support is arranged eccentrically to a central axis of the drive shaft, the central axis of the drive shaft in the sense of the invention preferably also being referred to as the axis of rotation.
  • the opening of the carrying device or of the adapter is preferably also positioned eccentrically to the axis of the insert tool or of the grinding means, for example the grinding segment ring. Due to the eccentric arrangement, a significantly improved grinding behavior can be achieved compared to conventional grinding devices, since, in contrast to a central arrangement, a larger area of the grinding wheel is in contact with the substrate to be ground. As a result, tilting of the grinding means and / or the insert tool can be particularly effectively prevented. In addition, more efficient processing of the substrate is possible, since a larger area of the grinding wheel is in contact with or in engagement with the substrate.
  • the carrying device of the proposed dust hood extension device is preferably designed to fit onto a dust hood, ie to be able to be placed on a dust hood.
  • the carrying device is set up to close again any openings that may arise during bevel grinding, so that the dust produced during grinding is effectively prevented from escaping from the area of the dust hood and the grinding device. Rather, the dust that arises during bevel grinding can be extracted essentially completely due to the proposed dust hood extension device, so that it no longer poses a health hazard to the operator.
  • This advantage of the invention is achieved in particular in that, by closing the openings by the carrying device of the dust hood extension device, the essentially complete air flow, which is generated as a suction flow by a vacuum cleaner device, is passed through the openings of the dust hood extension device.
  • the dust hood can be connected to a vacuum cleaner device so that the dust that is created when sanding with the sanding device can be extracted particularly easily, quickly and directly. The prompt removal of dust from the work area of the Grinding device, the health risk for the operator of the grinding device and bystanders can be further reduced considerably.
  • the dust hood extension device comprises a clip for attachment to the dust hood without tools.
  • the tool-free assembly of the dust hood extension device to the dust hood makes handling of the proposed dust hood extension device much easier because no additional tools have to be carried in order to use the dust hood extension device together with a sander and a dust hood.
  • the proposed dust hood extension device or the base support is so elastic in the region of the clip or comprises an elastic material that a clip mechanism for tool-free attachment to the dust hood is made possible.
  • the material of the clip is just so elastic that the clip can be easily moved backwards without breaking off, but is also so stiff and / or firm that it moves back towards the base support of the dust hood extension device when it is attached, in order to establish an effective connection between the dust hood extension device and the dust hood.
  • the clip connection obtained is preferably detachable, if necessary, so that the grinding device can be easily dismantled, cleaned and / or serviced.
  • the tool-free fastening of the dust hood with a clip on the dust hood extension device enables the user of the grinding device to switch back and forth between bevel and surface grinding in a particularly simple, uncomplicated and uncomplicated manner.
  • the carrying device can be rotatably supported on the dust hood.
  • the base support is rotatably mounted on the existing dust hood.
  • the carrying device comprises a plastic, which can preferably be a thermoplastic or a polyamide.
  • a plastic which can preferably be a thermoplastic or a polyamide.
  • PA6GFXX or PA6GF30 is very particularly preferred.
  • the base support can be made from PA6GFXX.
  • the letter combination XX preferably stands for glass fibers, which can be present in the material in different proportions.
  • the invention in a second aspect, relates to a system for grinding bevels that comprises a proposed dust hood extension device.
  • the system comprises at least one adapter, the adapter having at least one surface for resting on a surface to be processed, as well as an opening, the size of which can be adapted to a desired quality of the bevel to be ground.
  • the terms, definitions and technical advantages introduced for the dust hood extension device preferably apply analogously to the proposed kit.
  • the adapter is designed as a wear part.
  • the adapter can be produced in a different way, in particular more cost-effectively, than the base support of the proposed dust hood extension device.
  • the adapter can be produced using methods of mass production so that it can be produced quickly, easily and in large quantities. This is facilitated in particular by the fact that the adapter comprises polyoxymethylene (POM) or is formed from POM.
  • POM polyoxymethylene
  • the adapter is made from or comprises a tough thermoplastic.
  • adapters which comprise POM or are formed from POM have proven to be particularly wear-resistant and resistant, although they nevertheless have the necessary sliding properties for grinding applications.
  • POM As the material for the adapter, a particularly light adapter can be provided for the dust hood extension device, so that the additional provision of the adapter does not make handling of the grinding device difficult or only to a very small extent due to additional weight.
  • POM is particularly preferred for the purposes of the invention, since POM is particularly wear-resistant.
  • POM has low friction values and high toughness.
  • the use of the adapter as a wearing part advantageously leads to the fact that the dust hood extension device or the base support can be used for a longer period or are available for a longer period of use. This is particularly advantageous because the dust hood extension device or the base support is subject to increased wear due to the constant resting and / or grinding along rough surfaces.
  • the adapter in particular has two support surfaces with which the adapter or the dust hood extension device rests on the material to be ground.
  • the two support surfaces are preferably referred to as the first support surface and the second support surface.
  • the two bearing surfaces of the adapter are substantially perpendicular, i. arranged orthogonally to one another.
  • the proposed dust hood extension device rests with the first support surface of the adapter on the vertical front of the step to be sanded, while the dust hood extension device with the second support surface of the adapter rests on the horizontal top side of the stair step to be sanded.
  • the inclined bevel surface in the material of the step preferably forms an angle with the vertical front side and that of the horizontal top side of the step step, the angle being able to assume an angle in a range of 135 ° with a uniform bevel. In the case of asymmetrical bevels, other angles can also be used between the bevel and the two starting edges of the material to be processed.
  • the provision of the support surfaces preferably allows a particularly easy and simple application and alignment of the adapter or the proposed dust hood extension device to the corresponding edges, for example the vertical front or the horizontal top when grinding a bevel. As a result, a particularly uniform bevel can advantageously be produced, which can then be further processed accordingly.
  • the grinding segment, the segment ring is placed on the bevel surface through the opening of the proposed dust hood extension device or the base support or the adapter.
  • the opening of the adapter which is preferably formed between the support surfaces of the adapter, can preferably be of different sizes.
  • the adapter is designed in one piece, so that different opening sizes can be provided with different adapters. In the context of the invention, however, it can also be preferred that different sizes of the adapter opening could be achieved by a sliding mechanism.
  • part of the adapter can be designed to be movable and in particular displaceable.
  • the movable part of the adapter can be pushed into an opening in the base support.
  • the base support can, for example, have an opening for receiving the movable part of the adapter.
  • the opening can preferably be changed in the sense that it can be set larger or smaller.
  • the proposed system can preferably have more than one adapter and can thus be sold, for example, as a kit which comprises a dust hood extension device and several adapter devices.
  • the different adapters can, for example, allow chamfers of different widths to be ground.
  • the adapter which is present connected to the dust hood expansion device when the grinding device is in operation, can be exchanged in a particularly simple and uncomplicated manner.
  • an adapter device adapted to the width of the bevel to be produced can be used.
  • the different adapters can differ in particular in the size of their opening, the size of the opening being able to be adapted in particular to the width of the bevel to be produced.
  • the adapter comprises a clip for attachment to the dust hood without tools. It is preferred in the context of the invention that the clip for tool-free attachment of the adapter to the dust hood is arranged above the second support surface, ie for example above the horizontal surface of a step when the grinder is in use to create a bevel on a step . Preferably, the clip for tool-free attachment of the proposed dust hood extension device or the base support to the dust hood is also above the second bearing surface of the adapter arranged.
  • the above statements regarding the preferably elastic nature of the clip material preferably apply analogously to the adapter clip.
  • the system is designed to be height-adjustable.
  • the kit from the base support adapter for fine adjustment in relation to the tool insert, for example the segment ring, can be changed in height. This ensures a particularly effective suction of the dust produced during grinding with different abrasives and different degrees of wear of the abrasive.
  • the size of the bevel to be ground is between 5 and 200 mm, preferably between 10 and 100 mm.
  • the size of the opening of the adapter is in a range from 5 to 200 mm, preferably in a range from 10 to 100 mm.
  • a particularly wide range of bevel sizes can advantageously be covered.
  • other adapter openings are also conceivable depending on the nature and geometry or size or the abrasive used.
  • Figure 1 shows a preferred embodiment of a proposed dust hood extension device (4).
  • Is shown in Figure 1 is in particular the base support (1) and the adapter (2) of a dust hood extension device (4), as well as the opening (3) of the carrying device (1) and the opening (13) of the adapter (2).
  • Shown in Figure 1 is also the grinder (10) and the central axis (11) of the drive shaft.
  • the opening (3) of the base support (1) is arranged eccentrically with respect to the axis of rotation (11) of the grinding device (10), so that the opening (3 or 13) in particular above the grinding means (5) or above a segment of the preferably ring-like grinding means (5).
  • the support surfaces (6, 7) of the adapter (2) are arranged around the opening (3 or 13) and are suitable for aligning the dust hood extension device (4) with respect to the front and top of a block of material (16) to be processed.
  • the adapter (2) can be attached to the dust hood (not shown) with a first clip (9), while the base support (1) or the dust hood extension device (4) can be attached to the dust hood with a second clip (8).
  • the first clip (9) is preferably referred to as an adapter clip, while the second clip (8) is referred to as a dust hood extension device clip.
  • the clip devices (8, 9) are preferably arranged above the second support surface (6).
  • the first support surface (7) is preferably set up to align the dust hood expansion device (4) with respect to a substantially vertical front of the material block (16) to be processed.
  • the dust hood extension device (4) can be placed with the first support surface (7) on the front of the material block (16), for example a step.
  • the second support surface (6) is preferably set up to align the dust hood extension device (4) with reference to a substantially horizontally extending upper side of the material block (16) to be processed.
  • the dust hood expansion device (4) can be placed with the second support surface (6) on the top of the material block (16), for example a step.
  • Figure 3 shows a preferred embodiment of the dust hood extension device (4), with dust hood extension devices (4) with different adapters (2) being shown in particular.
  • Adapters (2) which have openings (13) of different sizes, the openings (13) preferably being at least partially delimited by the bearing surfaces (6, 7) of the adapter (2).
  • the opening (3) of the base support (1) remains essentially unchanged. Due to the differently sized openings (13) in the adapter (2), the dust hood extension device (4) can be adapted to different sizes of bevels (15) to be produced. This is facilitated by the fact that the adapter (2) is preferably designed as a wear or replacement part, so that different adapters (2) can be used in connection with the proposed dust hood extension device (4) when grinding chamfers (15) of different widths.
  • FIG. 4 shows a possible arrangement of an adapter (2) and a base support (1) of a preferred embodiment of a dust hood extension device (4) to one another.
  • FIG. 5 shows how the adapter (2) can be mounted on the base support (1).
  • the adapter (2) is hooked into the base support (1) in a rear area and clipped into the base support (1) in a front area using a clip mechanism.

Landscapes

  • 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)
EP19160445.3A 2019-03-04 2019-03-04 Dispositif d'extension de hotte anti-poussière et système comprenant un tel dispositif d'extension de hotte anti-poussière et adaptateur Withdrawn EP3705229A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19160445.3A EP3705229A1 (fr) 2019-03-04 2019-03-04 Dispositif d'extension de hotte anti-poussière et système comprenant un tel dispositif d'extension de hotte anti-poussière et adaptateur
PCT/EP2020/054869 WO2020178072A1 (fr) 2019-03-04 2020-02-25 Dispositif d'élargissement de hotte anti-poussières et système comprenant un dispositif d'élargissement de hotte anti-poussières de ce type et un adaptateur
US17/435,302 US12397395B2 (en) 2019-03-04 2020-02-25 Chamfering dust hood extension device and adapter
EP20705386.9A EP3934847B1 (fr) 2019-03-04 2020-02-25 Système comprenant un dispositif d'extension de hotte anti-poussière et adaptateur
CN202080011180.7A CN113382823A (zh) 2019-03-04 2020-02-25 集尘罩扩展设备以及包括这种集尘罩扩展设备和适配器的系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19160445.3A EP3705229A1 (fr) 2019-03-04 2019-03-04 Dispositif d'extension de hotte anti-poussière et système comprenant un tel dispositif d'extension de hotte anti-poussière et adaptateur

Publications (1)

Publication Number Publication Date
EP3705229A1 true EP3705229A1 (fr) 2020-09-09

Family

ID=65685209

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19160445.3A Withdrawn EP3705229A1 (fr) 2019-03-04 2019-03-04 Dispositif d'extension de hotte anti-poussière et système comprenant un tel dispositif d'extension de hotte anti-poussière et adaptateur
EP20705386.9A Active EP3934847B1 (fr) 2019-03-04 2020-02-25 Système comprenant un dispositif d'extension de hotte anti-poussière et adaptateur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20705386.9A Active EP3934847B1 (fr) 2019-03-04 2020-02-25 Système comprenant un dispositif d'extension de hotte anti-poussière et adaptateur

Country Status (4)

Country Link
US (1) US12397395B2 (fr)
EP (2) EP3705229A1 (fr)
CN (1) CN113382823A (fr)
WO (1) WO2020178072A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545082A (en) * 1994-05-02 1996-08-13 Courson; Michael W. Dust control system for rotary hand tools
EP0916453A2 (fr) * 1997-11-13 1999-05-19 HILTI Aktiengesellschaft Dispositif d'aspiration pour outil à main
EP1053829A1 (fr) * 1999-05-20 2000-11-22 HILTI Aktiengesellschaft Capot d'aspiration pour meuleuse à main
EP1321230A1 (fr) * 2001-12-20 2003-06-25 HILTI Aktiengesellschaft Dispositif de meulage avec capot d'aspiration
US20080171501A1 (en) * 2007-01-12 2008-07-17 Dennis David Woods Hood Plates for Handheld Grinding Tools
DE102008045203A1 (de) * 2008-08-30 2010-03-04 Meissner, Werner Schutzvorrichtung für einen Winkelschleifer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU472778B2 (en) * 1973-06-08 1976-06-03 Clarkson Industries Inc Dust collector for portable rotary disc grinder
US5445438A (en) * 1991-10-17 1995-08-29 Drumm; Arthur E. Strip brush for mounting on a rotary drum
US8267751B2 (en) * 2004-11-12 2012-09-18 Sunderland Tool, Ltd. Chamfering tool and method
JP5093464B2 (ja) * 2007-07-17 2012-12-12 日立工機株式会社 携帯用切断機
DE102010053424B4 (de) 2010-11-29 2015-06-03 C. & E. Fein Gmbh Schleifgerät mit Staubabsaugung
CN206982333U (zh) * 2017-05-23 2018-02-09 浙江金隆古建园林工程有限公司 一种砂轮机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545082A (en) * 1994-05-02 1996-08-13 Courson; Michael W. Dust control system for rotary hand tools
EP0916453A2 (fr) * 1997-11-13 1999-05-19 HILTI Aktiengesellschaft Dispositif d'aspiration pour outil à main
EP1053829A1 (fr) * 1999-05-20 2000-11-22 HILTI Aktiengesellschaft Capot d'aspiration pour meuleuse à main
EP1321230A1 (fr) * 2001-12-20 2003-06-25 HILTI Aktiengesellschaft Dispositif de meulage avec capot d'aspiration
US20080171501A1 (en) * 2007-01-12 2008-07-17 Dennis David Woods Hood Plates for Handheld Grinding Tools
DE102008045203A1 (de) * 2008-08-30 2010-03-04 Meissner, Werner Schutzvorrichtung für einen Winkelschleifer

Also Published As

Publication number Publication date
CN113382823A (zh) 2021-09-10
US20220203499A1 (en) 2022-06-30
US12397395B2 (en) 2025-08-26
WO2020178072A1 (fr) 2020-09-10
EP3934847C0 (fr) 2024-07-31
EP3934847B1 (fr) 2024-07-31
EP3934847A1 (fr) 2022-01-12

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