NL2012364B1 - Grinding machine and method for grinding a floor surface. - Google Patents

Grinding machine and method for grinding a floor surface. Download PDF

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Publication number
NL2012364B1
NL2012364B1 NL2012364A NL2012364A NL2012364B1 NL 2012364 B1 NL2012364 B1 NL 2012364B1 NL 2012364 A NL2012364 A NL 2012364A NL 2012364 A NL2012364 A NL 2012364A NL 2012364 B1 NL2012364 B1 NL 2012364B1
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NL
Netherlands
Prior art keywords
suction
sanding
suction tube
grinding
pressure difference
Prior art date
Application number
NL2012364A
Other languages
Dutch (nl)
Other versions
NL2012364A (en
Inventor
Johannes Van Eijden Barry
Gerardus Van Houten Adrianus
Original Assignee
Blastrac B V
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 Blastrac B V filed Critical Blastrac B V
Priority to NL2012364A priority Critical patent/NL2012364B1/en
Priority to DE202014102103.5U priority patent/DE202014102103U1/en
Priority to FR1454323A priority patent/FR3018214B1/en
Priority to BE2014/0399A priority patent/BE1021527B1/en
Publication of NL2012364A publication Critical patent/NL2012364A/en
Application granted granted Critical
Publication of NL2012364B1 publication Critical patent/NL2012364B1/en

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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
    • 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
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/08—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving liquid or pneumatic means
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Description

Title: Grinding machine and method for grinding a floor surface
The invention relates to a grinding machine for grinding a floor surface and to a method for grinding a floor surface using such a grinding machine.
Grinding machines to grind or polish floor surfaces, e.g. relatively large areas of hard material such as concrete of marble floors, are already known in the prior art and usually comprise: a grinding head for holding tools adapted to grind the floor surface; a grinding drive for driving the grinding head; and a control system to control the grinding drive. A drawback of grinding is that the grinding head produces a lot of particles. These particles may have a negative impact on the health of people nearby, especially when the particles comprise asbestos particles. To reduce the negative impact of the particles the grinding machine may comprise a nozzle arranged near the grinding head and a suction tube connected to the nozzle. The suction tube in turn is connectable to a suction device configured for providing suction in order to remove particles produced by the grinding head during grinding by suction.
However, although the grinding machines having the ability to remove particles produced by the grinding head provide advantages over grinding machines not having this ability, the prior art grinding machine having the ability to remove particles produced by the grinding head are not always satisfactory.
It is therefore an object of the invention to provide an improved grinding machine with the ability to remove particles produced by the grinding head during grinding.
This object is achieved by a grinding machine according to the preamble of claim 1, characterized in that the grinding machine further comprises a pressure sensor to measure a pressure difference between inside the suction tube and a reference pressure, in that the pressure sensor is connected to the control system, and in that the control system is configured to control the grinding drive based on the measured pressure difference such that grinding only takes place in case of sufficient suction through the suction tube.
Due to the presence of the pressure sensor and the configuration of the control system it is ensured that during grinding of the grinding machine the applied suction through the suction tube is sufficient to remove particles produced during grinding of the grinding head. Hence, the risk that suction is insufficient thereby allowing a relatively large amount of particles to escape and subsequently exposing people nearby to these escaped particles is reduced if not eliminated. As a result, the negative impact of the particles on the health of the people is reduced as well.
The invention is amongst others based on the insight that the pressure difference between inside the suction tube and the reference pressure is a measure for the sufficiency of the suction. Hence, when the suction device fails or malfunctions, or the grinding machine is operated such that suction is insufficient, the pressure sensor will measure the effect thereof and the control system is able to take action. This action may be in the form of preventing grinding of the grinding head in case the grinding process isn’t started yet or in the form of stopping the grinding process if the grinding process is carried out. The control system is able to take this action by appropriately controlling the grinding drive.
In an embodiment, the reference pressure is atmospheric pressure. For instance, the pressure sensor measures the pressure difference between inside the suction tube and the environment of the grinding machine. In this way, the measured pressure difference to determine whether suction is sufficient is independent of the environmental conditions and thus the accuracy of the determination whether suction is sufficient is improved.
In an embodiment, the pressure sensor is configured to measure the pressure inside the suction tube at a distance from the end that is connected to the nozzle, preferably at an end of the suction tube that is opposite to the end that is connected to the nozzle. An advantage of measuring the pressure at a distance from the nozzle is that the flow through the suction tube has had time to settle, which provides a cleaner measurement of the pressure.
In an embodiment, the grinding machine comprises a dust shroud around the grinding head for keeping particles produced by the grinding head near the grinding head in order to allow them to be removed by suction. The dust shroud thus provides a barrier for the particles preventing them from escaping before being removed by suction.
Suction through the suction tube will create an underpressure in the suction tube relative to atmospheric pressure. The dust shroud in an embodiment will not only provide a barrier for particles, but will also provide a barrier for air to easily reach the area around the grinding head from outside the grinding machine. This will result in a lower pressure in the suction tube compared to a grinding machine without dust shroud or the like. As a result, the measurement of the pressure difference between inside the suction tube and the reference pressure allows to distinguish between a normal operating situation in which the grinding head is in contact with the floor surface and the dust shroud substantially closes off the area around the grinding head and a situation in which the grinding head and dust shroud are lifted from the floor surface thereby loosing the barrier function of the dust shroud and thus the ability to adequately remove the particles produced by the grinding head. Suction through the suction tube is then not sufficient to remove the particles. The pressure sensor will then measure a different pressure difference, so that the control system based on the applied information will stop or prevent the start of the grinding process.
In an embodiment, the dust shroud comprises a stationary portion and a moveable portion, wherein the moveable portion is moveable over a predetermined range relative to the stationary portion. The stationary portion and moveable portion may be separately fabricated and assembled in a later stage, but may also be fabricated as a single component. In case of a single component, the moveability of the moveable portion may be introduced by providing a flexible or resilient portion in between the moveable portion and the stationary portion.
The relative position between moveable portion and stationary portion is preferably set by contact between the moveable portion and the floor surface. This ensures that whenever possible the dust shroud makes contact with the floor surface thereby improving the barrier function of the dust shroud across the predetermined moving range of the moveable portion.
In an embodiment, the grinding machine further comprises an indicator light connected to the control system such that the indicator light provides a visual signal for the operator of the grinding machine whether there is sufficient suction through the suction tube. This allows the operator to quickly determine the cause of the grinding process being interrupted or prevented by the control system.
In an embodiment, the control system is configured to compare the measured pressure difference with the threshold value in order to determine whether there is sufficient suction through the suction tube. For instance, if the underpressure inside the suction tube is measured relative to atmospheric pressure to yield the pressure difference, this pressure difference may not become too small. Hence, in that situation the pressure difference is compared to a threshold and suction is sufficient when the pressure difference is larger than the threshold and is insufficient when the pressure difference is smaller than the threshold.
In case the underpressure inside the suction tube is measured relative to a reference pressure that is below the underpressure inside the suction tube, this pressure difference may not become too large. Hence, in that situation the pressure difference is compared to a threshold and suction is sufficient when the pressure difference is smaller than the threshold and is insufficient when the pressure difference is larger than the threshold.
The threshold should be set to such a value that underpressure generated by a rotating grinding head does not already cause the control system to determine sufficient suction. The machine can be calibrated for this to increase robustness.
The invention also relates to a method for grinding a floor surface using a grinding machine that comprises a grinding head for holding tools adapted to grind the floor surface, a grinding drive for driving the grinding head, a control system to control the grinding drive, a suction tube and a nozzle, wherein the nozzle is arranged near the grinding head and is connected to the suction tube which in turn is connectable to a suction device configured for providing suction in order to remove particles produced by the grinding head during grinding by suction. The method comprises the following steps: a) connecting the suction tube to a suction device; b) operating the suction device to provide suction through the suction tube; c) measuring a pressure difference between inside the suction tube and a reference pressure; d) evaluating the measured pressure difference to determine whether there is sufficient suction through the suction tube; and e) controlling the grinding drive based on the evaluation of the measured pressure difference such that grinding only takes place in case of sufficient suction through the suction tube.
In an embodiment, evaluating the measured pressure difference comprises comparing the measured pressure difference with a predetermined threshold value. For instance, if the underpressure inside the suction tube is measured relative to atmospheric pressure to yield the pressure difference, this pressure difference may not become too small. Hence, in that situation the pressure difference is compared to the threshold and suction is sufficient when the pressure difference is larger than the threshold and is insufficient when the pressure difference is smaller than the threshold. In case the underpressure inside the suction tube is measured relative to a reference pressure that is below the underpressure inside the suction tube, this pressure difference may not become too large. Hence, in that situation the pressure difference is compared to the threshold and suction is sufficient when the pressure difference is smaller than the threshold and is insufficient when the pressure difference is larger than the threshold.
In an embodiment, the method comprises the step of providing a visual signal representative for the evaluation of the measured pressure difference, said visual signal indicating whether there is sufficient suction through the suction tube. This allows the operator to quickly determine the cause of the grinding process being interrupted or prevented by the control system.
In an embodiment, measuring a pressure difference between inside the suction tube and a reference pressure comprises measuring the pressure at an end of the suction tube that is opposite to the end of the suction tube that is connected to the nozzle.
In an embodiment, the reference pressure is atmospheric pressure.
The invention will now be described in a non-limiting way by reference to the accompanying drawings in which like parts are indicated by like reference symbols, and in which:
Fig. 1 depicts schematically a cross sectional view of a grinding machine according to an embodiment of the invention;
Fig. 2 depicts a perspective rear view of a grinding machine according to another embodiment of the invention; and
Fig. 3 depicts a perspective front view of the grinding machine of Fig. 2.
Fig. 1 depicts highly schematically a grinding machine GM according to an embodiment of the invention. The grinding machine is configured for grinding and polishing floor surfaces, such as marble or concrete floors.
The grinding machine comprises a grinding head GH for holding tools TO adapted to grind the floor surface. The grinding head GH may comprise a rotary disc to which the tools TO are attached.
The grinding head GH is driven by a grinding drive GD via an axle AX. The grinding drive GD may be an electromotor or hydraulic engine. The grinding drive GD is controlled by a control system CS.
During grinding the grinding head GH may produce particles. The grinding machine therefor comprises a nozzle NO connected to a suction tube ST, which in turn is connected to a suction device SD in order to remove the particles produced by the grinding head during grinding by suction. The nozzle is therefore arranged near the grinding head.
The grinding machine further comprises a pressure sensor PS to measure a pressure difference between inside the suction tube ST and a reference pressure, here being the atmospheric pressure in the surroundings. The pressure sensor PS is connected to the control system CS.
The control system CS is configured to control the grinding drive based on the measured pressure difference such that grinding only takes place in case of sufficient suction through the suction tube.
The grinding machine GM and the suction device SD are here depicted as separate units, wherein the suction tube ST of the grinding machine is connected via tube TU to a suction engine SE that applies a vacuum to the suction tube ST to draw in air and particles. The air and particles are forced through a filter FI to catch the particles.
Alternatively, the suction device SD or components thereof may be part of the grinding machine GM.
When using the grinding machine GM, one of the first steps is to connect the suction tube ST to the suction device SD, in this embodiment via the tube TU. Subsequently the suction device is operated to provide suction through the suction tube ST. In this embodiment this is carried out by operating the suction engine SE.
The pressure sensor PS is then used to measure a pressure difference between inside the suction tube ST and a reference pressure, in this embodiment atmospheric pressure. The measured pressure difference is then evaluated by the control system CS to determine whether there is sufficient suction through the suction tube ST. Based on the evaluation of the measured pressure difference, the grinding drive is controlled by the control system CS such that grinding only takes place in case of sufficient suction through the suction tube.
Figs 2 and 3 depict a grinding machine GM according to another embodiment of the invention.
Although not explicitly shown, the grinding machine comprises a grinding head for holding tools adapted to grind a floor surface. The grinding head is driven by a grinding drive GD, which is controlled by a control system CS.
The grinding machine further comprises a nozzle (not shown) arranged near the grinding head and connected to a suction tube ST, which is connectable to a suction device (not shown) for providing suction in order to remove particles produced by the grinding head during grinding by suction.
The grinding machine further comprises a pressure sensor PS measuring a pressure difference between inside the suction tube and a reference pressure. In this embodiment, the reference pressure is atmospheric pressure.
The pressure sensor PS is configured to measure the pressure inside the suction tube at an end EN thereof that is opposite to the end that is connected to the nozzle near the grinding head.
The pressure sensor PS is connected to the control system CS, and the control system is configured to control the grinding drive GD based on the measured pressure difference such that grinding only takes place in case of sufficient suction through the suction tube.
Surrounding the grinding head, which is the reason why the grinding head is not shown, is a dust shroud DS. The dust shroud in this embodiment is arranged to keep particles produced by the grinding head near the grinding head in order to allow them to be removed by suction. The dust shroud comprises a stationary portion SP and a moveable portion MP, wherein the moveable portion is moveable over a predetermined range relative to the stationary portion SP in order to ensure that the dust shroud forms a good barrier even if the grinding head is moved up and down within the moving range of the moveable portion. The moveable portion is therefor configured to make contact with the floor surface thereby setting a relative position between moveable portion and stationary portion. In a preferred embodiment, the moveable portion rests on the floor surface due to gravity forces acting thereon.
In order to power the grinding drive, control system and/or the pressure sensor, the grinding machine is connectable to a power supply using connector CO.
The grinding machine further comprises an indicator light IL connected to the control system such that the indicator light provides a visual signal for the operator of the grinding machine whether there is sufficient suction through the suction tube.

Claims (12)

1. Schuurmachine voor het schuren van een vloeroppervlak, omvattende: - een schuurkop voor het vasthouden van gereedschappen die ingericht zijn om het vloeroppervlak te schuren; - een schuuraandrijving voor het aandrijven van de schuurkop; - een regelsysteem voor het regelen van de schuuraandrijving; - een afzuigbuis; en - een mondstuk; waarbij het mondstuk is aangebracht vlakbij de schuurkop en verbonden is met de afzuigbuis die op zijn beurt te koppelen is met een afzuiginrichting ingericht voor het verschaffen van zuigkracht om deeltjes te verwijderen die geproduceerd worden door de schuurkop gedurende het schuren middels afzuigen, met het kenmerk, dat de schuurmachine een druksensor omvat voor het meten van een drukverschil tussen het binnenste van de afzuigbuis en een referentiedruk, en dat het regelsysteem is ingericht om de schuuraandrijving te regelen op basis van het gemeten drukverschil zodat schuren alleen plaats vindt in het geval van voldoende zuigkracht door de afzuigbuis.A sanding machine for sanding a floor surface, comprising: - an sanding head for holding tools adapted to sand the floor surface; - a sanding drive for driving the sanding head; - a control system for controlling the sanding drive; - a suction tube; and a mouthpiece; the nozzle being disposed near the sanding head and connected to the suction tube which in turn can be coupled to a suction device adapted to provide suction to remove particles produced by the sanding head during sanding by suction, characterized in that that the sander comprises a pressure sensor for measuring a pressure difference between the interior of the exhaust pipe and a reference pressure, and that the control system is adapted to control the sanding drive on the basis of the measured pressure difference so that sanding only takes place in the case of sufficient suction power through the exhaust pipe. 2. De schuurmachine volgens conclusie 1, waarbij de referentiedruk atmosferische druk is.The sanding machine according to claim 1, wherein the reference pressure is atmospheric pressure. 3. De schuurmachine volgens conclusie 1, waarbij de druksensor is ingericht om de druk in het binnenste van de afzuigbuis te meten aan een uiteinde ervan dat tegenover het uiteinde is gelegen dat verbonden is met het mondstuk.The sander of claim 1, wherein the pressure sensor is adapted to measure the pressure in the interior of the exhaust pipe at an end thereof opposite the end connected to the nozzle. 4. De schuurmachine volgens conclusie 1, verder omvattende een stofkap rond de schuurkop voor het nabij de schuurkop houden van deeltjes die geproduceerd worden door de schuurkop zodat ze verwijderd kunnen worden door afzuigen.The sanding machine of claim 1, further comprising a dust cap around the sanding head for holding particles produced by the sanding head near the sanding head so that they can be removed by suction. 5. De schuurmachine volgens conclusie 4, waarbij de stofkap een vast gedeelte en een beweegbaar gedeelte omvat, waarbij het beweegbare gedeelte beweegbaar is over een vooraf bepaald bereik ten opzichte van het vaste gedeelte, en waarbij het beweegbare gedeelte is ingericht om contact te maken met het vloeroppervlak waardoor een relatieve positie tussen het beweegbare gedeelte en het vaste gedeelte wordt ingesteld.The sander of claim 4, wherein the dust cover comprises a fixed portion and a movable portion, wherein the movable portion is movable over a predetermined range relative to the fixed portion, and wherein the movable portion is adapted to contact the floor surface whereby a relative position between the movable part and the fixed part is set. 6. De schuurmachine volgens conclusie 1, verder omvattende een indicatielicht verbonden met het regelsysteem zodat het indicatielicht een visueel signaal verschaft voor een gebruiker van de schuurmachine of er voldoende zuigkracht is door de afzuigbuis.The sander of claim 1, further comprising an indicator light connected to the control system so that the indicator light provides a visual signal to a user of the sander whether there is sufficient suction through the suction tube. 7. De schuurmachine volgens conclusie 1, waarbij het regelsysteem is ingericht om het gemeten drukverschil te vergelijken met de grenswaarde om te bepalen of er voldoende zuigkracht door de afzuigbuis is.The sanding machine according to claim 1, wherein the control system is arranged to compare the measured pressure difference with the limit value to determine whether there is sufficient suction through the suction pipe. 8. Een werkwijze voor het schuren van een vloeroppervlak middels een schuurmachine die een schuurkop omvat voor het vasthouden van gereedschappen die ingericht zijn om het vloeroppervlak te schuren, een schuuraandrijving voor het aandrijven van de schuurkop, een regelsysteem voor het regelen van de schuuraandrijving, een afzuigbuis en een mondstuk, waarbij het mondstuk is aangebracht vlakbij de schuurkop en verbonden is met de afzuigbuis die op zijn beurt te koppelen is met een afzuiginrichting ingericht voor het verschaffen van zuigkracht om deeltjes te verwijderen die geproduceerd worden door de schuurkop gedurende het schuren middels afzuigen, waarbij de werkwijze de volgende stappen omvat: a. het verbinden van de afzuigbuis aan een afzuiginrichting; b. het bedienen van de afzuiginrichting om zuigkracht te verschaffen door de afzuigbuis; c. het meten van een drukverschil tussen het binnenste van de afzuigbuis en een referentiedruk; d. het evalueren van het gemeten drukverschil om te bepalen of er voldoende zuigkracht door de afzuigbuis is; en e. het regelen van de schuuraandrijving op basis van de evaluatie van het gemeten drukverschil zodat schuren alleen plaats vindt in het geval er voldoende zuigkracht door de afzuigbuis is.A method for sanding a floor surface by means of a sander comprising a sanding head for holding tools adapted to sand the floor surface, a sanding drive for driving the sanding head, a control system for controlling the sanding drive, a suction tube and a nozzle, the nozzle being arranged near the sanding head and connected to the suction tube which in turn can be coupled to a suction device adapted to provide suction to remove particles produced by the sanding head during sanding by suction wherein the method comprises the following steps: a. connecting the suction tube to a suction device; b. operating the suction device to provide suction through the suction tube; c. measuring a pressure difference between the interior of the exhaust pipe and a reference pressure; d. evaluating the measured pressure difference to determine if there is sufficient suction through the exhaust pipe; and e. controlling the sanding drive based on the evaluation of the measured pressure difference so that sanding only takes place if there is sufficient suction through the suction pipe. 9. De werkwijze volgens conclusie 8, waarbij het evalueren van het gemeten drukverschil omvat het vergelijken van het gemeten drukverschil met een vooraf bepaalde grenswaarde.The method of claim 8, wherein evaluating the measured pressure difference comprises comparing the measured pressure difference with a predetermined limit value. 10. De werkwijze volgens conclusie 8, verder omvattende de stap van het verschaffen van een visueel signaal dat representatief is voor de evaluatie van het gemeten drukverschil, waarbij het visuele signaal aangeeft of er voldoende zuigkracht door de afzuigbuis is.The method of claim 8, further comprising the step of providing a visual signal representative of the evaluation of the measured pressure differential, wherein the visual signal indicates whether there is sufficient suction through the suction tube. 11. De werkwijze volgens conclusie 8, waarbij het meten van een drukverschil tussen het binnenste van de afzuigbuis en een referentiedruk omvat het meten van de druk aan een uiteinde van de afzuigbuis dat tegenover het uiteinde van de afzuigbuis ligt dat verbonden is met het mondstuk.The method of claim 8, wherein measuring a pressure difference between the interior of the suction tube and a reference pressure comprises measuring the pressure at an end of the suction tube that is opposite the end of the suction tube connected to the nozzle. 12. De werkwijze volgens conclusie 8, waarbij de referentiedruk atmosferische druk is.The method of claim 8, wherein the reference pressure is atmospheric pressure.
NL2012364A 2014-03-05 2014-03-05 Grinding machine and method for grinding a floor surface. NL2012364B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL2012364A NL2012364B1 (en) 2014-03-05 2014-03-05 Grinding machine and method for grinding a floor surface.
DE202014102103.5U DE202014102103U1 (en) 2014-03-05 2014-05-06 grinding machine
FR1454323A FR3018214B1 (en) 2014-03-05 2014-05-15 GRINDER AND METHOD FOR GRINDING A FLOOR SURFACE
BE2014/0399A BE1021527B1 (en) 2014-03-05 2014-05-22 GRINDER AND METHOD FOR GRINDING A FLOOR SURFACE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2012364A NL2012364B1 (en) 2014-03-05 2014-03-05 Grinding machine and method for grinding a floor surface.

Publications (2)

Publication Number Publication Date
NL2012364A NL2012364A (en) 2015-11-12
NL2012364B1 true NL2012364B1 (en) 2015-12-03

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NL2012364A NL2012364B1 (en) 2014-03-05 2014-03-05 Grinding machine and method for grinding a floor surface.

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BE (1) BE1021527B1 (en)
DE (1) DE202014102103U1 (en)
FR (1) FR3018214B1 (en)
NL (1) NL2012364B1 (en)

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FR3067273A1 (en) * 2017-06-07 2018-12-14 M.B.H. Developpement SECURED USE SURFACE DEVICE
SE541282C3 (en) * 2017-09-05 2019-07-16 Husqvarna Ab Separator and method of operating a separator
CN113635162B (en) * 2020-04-27 2022-07-15 广东博智林机器人有限公司 Movable dust collector and grinding dust collection device
CN111872766B (en) * 2020-07-16 2021-09-28 中国建筑第二工程局有限公司 Building wall levels grinding device
SE544532C2 (en) * 2020-12-18 2022-07-05 Husqvarna Ab Improved fault detection methods for power tools
EP4263125A1 (en) * 2020-12-18 2023-10-25 Husqvarna AB Automated detection of tool glazing in floor grinders
CN113172552A (en) * 2021-03-31 2021-07-27 山东省威科泰激光科技有限公司 Lateral force induction automatic polishing technology

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DE10012182C1 (en) * 2000-03-13 2001-08-09 Karl Schaffer Surface treatment device for contaminated floor surface has differential pressure switch monitoring suction system for extraction of removed material for safety shut-down
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Publication number Publication date
NL2012364A (en) 2015-11-12
BE1021527B1 (en) 2015-12-08
DE202014102103U1 (en) 2015-06-11
FR3018214A1 (en) 2015-09-11
FR3018214B1 (en) 2018-01-12

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