EP2151302A1 - A disc for supporting abrasive material, for electric tools - Google Patents
A disc for supporting abrasive material, for electric tools Download PDFInfo
- Publication number
- EP2151302A1 EP2151302A1 EP09165152A EP09165152A EP2151302A1 EP 2151302 A1 EP2151302 A1 EP 2151302A1 EP 09165152 A EP09165152 A EP 09165152A EP 09165152 A EP09165152 A EP 09165152A EP 2151302 A1 EP2151302 A1 EP 2151302A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- cup
- shaped portion
- abrasive material
- walls
- 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.)
- Granted
Links
- 239000003082 abrasive agent Substances 0.000 title claims abstract description 33
- 239000000428 dust Substances 0.000 abstract description 20
- 239000000463 material Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009424 underpinning Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/08—Circular back-plates for carrying flexible material
-
- 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
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
-
- 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
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/18—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor with cooling provisions
Definitions
- the invention relates to a disc for electric tools, for supporting abrasive material.
- discs are usually employed in industry or in the do-it-yourself field in combination with electric tools such as drills, sanders, millers and the like, to perform abrasive actions on surfaces.
- abrasive discs for electric tools comprise an annular surface destined to engagedly receive abrasive material, such as for example sandpaper of any grain.
- abrasive material used is given by little blades arranged partially superposed on one another, such that each blade exhibits a free edge which is substantially aligned with an ideal radius developing from the centre of the disc and going up to the edge thereof.
- the blades are stably constrained to the discs by an adhesive material, for example a layer of resin, or are inserted and constrained in channels afforded on the annular portion of the disc.
- a cup-shaped portion develops internally of the annular portion of the disc which is destined to receive the abrasive material, which cup-shaped portion exhibits a hole at a central position of the disc.
- the shaft of the electric tool chuck is inserted in the hole, to constrain the disc to the tool.
- the chuck shaft is usually conformed such that it exhibits a change in section which defines an abutment having greater dimensions than the hole in the disc.
- the disc is rested on the abutment and the portion of shaft passing through the hole of the disc is engaged by a locknut; thus the disc is coupled to the electric tool.
- the cup-shaped portion of the disc is necessary to ensure that the locknut does not extend (for obvious reasons) beyond the active surface of the disc, i.e. it does not extend beyond the abrasive surface defined by the abrasive material.
- the cup-shaped portion is conformed such as to present the concavity thereof (the inside of the cup) arranged on the same side as the surface of the annular portion destined to engage with the abrasive material.
- the powder collected in the cup-shaped portion is expelled therefrom in a radial direction towards the external periphery of the disc.
- the technical aim underpinning the present invention is to provide a disc for electric tools, for the supporting of abrasive material, which obviates the drawbacks in the above-mentioned prior art.
- an aim of the present invention is to provide a disc for electric tools for supporting abrasive material which is able to guarantee an ideal functioning condition of the abrasive material.
- the set technical aim and the specified objective are substantially attained by a disc for electric tools for supporting abrasive material, comprising technical characteristics as set out in one or more of the appended claims.
- 1 denotes in its entirety a disc for electric tools for supporting abrasive material, according to the present invention.
- the disc 1 comprises an annular portion 2 destined to engagingly receive abrasive material (not illustrated).
- the annular portion 2 comprises a first surface 3 and a second surface 4 opposite the first surface 3.
- Both the surfaces 3, 4 are substantially flat and have an annular development.
- the abrasive material is constrained to the first surface 3, preferably with the aid of an adhesive material, for example a resin.
- the first surface 3 of the annular portion comprises a plurality of circular recesses 5 which are reciprocally concentric in order to facilitate the constraining of the abrasive material to the disc 1.
- abrasive material which can be constrained to the annular portion 2 can be of any kind.
- abrasive material of a sheet-form or flat-form is constrained to the annular portion 2, such that each sheet superposes an adjacent one, creating a crown of abrasive material superposed on the annular portion 2.
- the disc 1 further comprises a cup-shaped portion 6 (illustrated in figure 1 and also visible in figure 4 ) which develops internally of the annular portion 2.
- the cup-shaped portion 6 comprises a bottom wall 7 and a lateral wall 8 which connects the bottom wall 7 and the annular portion 2.
- the bottom wall 7 has a substantially flat development and develops substantially parallel to the annular portion 2, as illustrated clearly in figure 4 .
- the lateral wall 8 develops between the bottom wall 7 and the annular portion 2 and has a substantially truncoconical development, as illustrated in the figures.
- the cup-shaped portion 6 has the concavity thereof facing towards the annular portion 2.
- the bottom wall 7 of the cup-shaped portion 6 comprises a central hole 9 for passage of a shaft of a chuck of an electric tool, which engages the disc 1 to the electric tool.
- the cup-shaped portion 6 advantageously comprises a plurality of openings 10 arranged on the lateral wall 8, as illustrated in the accompanying figures of the drawings.
- the dust i.e. the particles of abraded material produced during the use of the disc 1
- the periphery of the cup-shaped portion 6 i.e. towards the lateral wall 8 thereof
- the openings 10 preventing the dust from striking the abrasive material located on the annular portion 2 and clogging it to reduce its efficiency.
- the openings 10 preferably extend from the bottom wall 7 up to reaching the annular portion 2, in particular the second surface 4 thereof, such that the openings develop over the whole height of the cup-shaped portion 6 and ensure excellent disposal of the dust contained in the cup-shaped portion 6.
- the height of the cup is the distance between the bottom wall 7 and a plane passing through the annular portion 2, in particular the first surface 3 of the annular portion, measured on a straight line which is perpendicular to the bottom wall 7.
- the openings 10 are identical to one another in dimensions and shape and are reciprocally equidistanced.
- the dust is in this way expelled from the cup-shaped portion 6 uniformly, i.e. not depending on the relative position of the dust inside the cup-shaped portion 6.
- the disc 1 advantageously comprises a plurality of walls 11 (see figures 1 and 2 ) which develop between the hole 9 and the lateral wall 7 of the cup-shaped portion 7.
- Each wall 11 physically separates an opening 10 from an adjacent opening 10.
- two adjacent walls 11 define, in combination with an opening 10 in the lateral wall 7 of the cup-shaped portion 6, a discharge channel 12, i.e. a space delimited by three walls and open at an end thereof.
- the function of the walls 11 and therefore the discharge channels 12 is to direct the dust which accumulates in the cup-shaped portion 6 towards the openings 10, preventing the dust from freely circulating internally of the cup-shaped portion 6 before being discharged through the openings 10.
- the walls 11 further increase the ability to discharge dust accumulated internally of the cup-shaped portion 6.
- Each discharge channel 12 preferably exhibits transversal sections which progressively increase in size going from the hole 9 towards the lateral wall 8 of the cup 6.
- transversal sections of the discharge channels are meant the sections of the discharge channels along a perpendicular plane to the bottom wall 7 of the cup-shaped portion 6.
- each discharge channel 12 preferably have a spiral-portion development, such that each wall 11 behaves like a blade of an impeller of a centrifugal ventilator.
- the flow of dust being deviated as described above, therefore strikes the openings 10 in the side wall 8 of the cup-shaped portion 6 and exits from the disc 1 without striking the first surface 3 (the surface which constrainingly receives the abrasive material) of the annular portion 2.
- the cup-shaped portion 6 further comprises a cylindrical element 13 emerging from the bottom wall 7.
- the hole 9 is afforded in the cylindrical element 13 and is threaded.
- the chuck shaft screws directly into the threaded hole 9, constraining the disc 1 to the electric tool.
- the threading of the hole 9 is such that during rotation of the disc 1 the forces acting on the disc 1 tend to rotate the disc 1 with respect to the chuck shaft in the screwing direction of the disc on the chuck shaft.
- the cylindrical element 13 exhibits a height which is substantially identical to the height of the lateral wall 8 of the cup-shaped portion 6, such that the cylindrical element 13 is abreast of the annular portion 2.
- the height of the cylindrical element is measured in the same way as described above, to define the height of the cup-shaped portion 6.
- the walls 11 are connected to an external surface of the cylindrical element, such that each discharge channel 12 is separated from the adjacent one.
- each wall 11 is preferably of a height (measured as above-indicated in relation to the height of the cup-shaped portion 6) which is substantially identical to that of the cylindrical element 13 and the cup-shaped portion 6.
- the hole 9 enables a self-locking coupling between the disc and the tool.
- a plurality of retaining teeth 14 are fashioned from the cylindrical portion 13, which teeth 14 are destined to retain a washer (not illustrated) for demounting the disc from the electric tool.
- the washer is screwed on the shaft of the chuck and is lodged in the retaining teeth 14, thus being solidly constrained to the disc 1.
- the retaining teeth 14 are four in number and are equidistanced.
- the lower part of the cup-shaped portion 6, i.e. the part facing the opposite direction with respect to the concavity which houses the walls 11, comprises an annular undercut 15 which develops about the hole 9.
- This undercut 15 has the function of self-centring the disc 1 on the chuck shaft.
- the invention as described achieves the set aims.
- the openings 10 enable the dust collected in the cup-shaped portion 6 to be discharged without striking the surface of the annular portion 2 destined to receive the abrasive material.
- the walls 11 increase the efficiency of the dust discharge.
- the presence of the walls 11 increases the mechanical properties of the abrasive tool 1, giving it greater rigidity with respect to traditional tools in the prior art.
Abstract
Description
- The invention relates to a disc for electric tools, for supporting abrasive material.
- These types of discs are usually employed in industry or in the do-it-yourself field in combination with electric tools such as drills, sanders, millers and the like, to perform abrasive actions on surfaces.
- These abrasive discs for electric tools comprise an annular surface destined to engagedly receive abrasive material, such as for example sandpaper of any grain.
- An example of abrasive material used is given by little blades arranged partially superposed on one another, such that each blade exhibits a free edge which is substantially aligned with an ideal radius developing from the centre of the disc and going up to the edge thereof.
- The blades are stably constrained to the discs by an adhesive material, for example a layer of resin, or are inserted and constrained in channels afforded on the annular portion of the disc.
- A cup-shaped portion develops internally of the annular portion of the disc which is destined to receive the abrasive material, which cup-shaped portion exhibits a hole at a central position of the disc.
- The shaft of the electric tool chuck is inserted in the hole, to constrain the disc to the tool.
- In particular, the chuck shaft is usually conformed such that it exhibits a change in section which defines an abutment having greater dimensions than the hole in the disc.
- The disc is rested on the abutment and the portion of shaft passing through the hole of the disc is engaged by a locknut; thus the disc is coupled to the electric tool.
- The cup-shaped portion of the disc is necessary to ensure that the locknut does not extend (for obvious reasons) beyond the active surface of the disc, i.e. it does not extend beyond the abrasive surface defined by the abrasive material.
- From the above it can be understood that the cup-shaped portion is conformed such as to present the concavity thereof (the inside of the cup) arranged on the same side as the surface of the annular portion destined to engage with the abrasive material.
- The discs for electric tools for supporting abrasive material in the prior art as briefly described herein above exhibit some drawbacks during use thereof.
- In particular, when the disc having abrasive material is mounted on the electric tool and used, the dust produced following the abrading operations tends to clog the abrasive material, considerably reducing the abrasive capacity thereof.
- During rotation of the disc a part of the dust produced strikes the cup-shaped portion and collects in the concavity thereof.
- By effect of the rotation of the disc, the powder collected in the cup-shaped portion is expelled therefrom in a radial direction towards the external periphery of the disc.
- Thus the dust produced and collected in the cup-shaped portion strikes the abrasive material and deposits thereon, reducing its functionality.
- In this context, the technical aim underpinning the present invention is to provide a disc for electric tools, for the supporting of abrasive material, which obviates the drawbacks in the above-mentioned prior art.
- In particular, an aim of the present invention is to provide a disc for electric tools for supporting abrasive material which is able to guarantee an ideal functioning condition of the abrasive material.
- The set technical aim and the specified objective are substantially attained by a disc for electric tools for supporting abrasive material, comprising technical characteristics as set out in one or more of the appended claims.
- Further characteristics and advantages of the present invention will more clearly emerge from the following non-limiting description of a preferred but not exclusive embodiment of a disc for electric tools for supporting abrasive material, as illustrated in the accompanying figures of the drawings, in which:
-
figure 1 is a perspective view of the disc for electric tools for supporting abrasive material of the present invention; -
figure 2 is a front view of the disc offigure 1 ; -
figure 3 is a rear view of the disc offigure 1 ; and -
figure 4 is a lateral view of the disc offigure 1 . - With reference to the figures of the drawings, 1 denotes in its entirety a disc for electric tools for supporting abrasive material, according to the present invention.
- The
disc 1 comprises anannular portion 2 destined to engagingly receive abrasive material (not illustrated). - The
annular portion 2 comprises afirst surface 3 and asecond surface 4 opposite thefirst surface 3. - Both the
surfaces - The abrasive material is constrained to the
first surface 3, preferably with the aid of an adhesive material, for example a resin. - As shown in
figures 1 and 2 , thefirst surface 3 of the annular portion comprises a plurality ofcircular recesses 5 which are reciprocally concentric in order to facilitate the constraining of the abrasive material to thedisc 1. - It is stressed that the abrasive material which can be constrained to the
annular portion 2 can be of any kind. - Preferably abrasive material of a sheet-form or flat-form is constrained to the
annular portion 2, such that each sheet superposes an adjacent one, creating a crown of abrasive material superposed on theannular portion 2. - The
disc 1 further comprises a cup-shaped portion 6 (illustrated infigure 1 and also visible infigure 4 ) which develops internally of theannular portion 2. - The cup-
shaped portion 6 comprises abottom wall 7 and alateral wall 8 which connects thebottom wall 7 and theannular portion 2. - The
bottom wall 7 has a substantially flat development and develops substantially parallel to theannular portion 2, as illustrated clearly infigure 4 . - The
lateral wall 8 develops between thebottom wall 7 and theannular portion 2 and has a substantially truncoconical development, as illustrated in the figures. - According to the above description, the cup-
shaped portion 6 has the concavity thereof facing towards theannular portion 2. - The
bottom wall 7 of the cup-shaped portion 6 comprises acentral hole 9 for passage of a shaft of a chuck of an electric tool, which engages thedisc 1 to the electric tool. - The cup-
shaped portion 6 advantageously comprises a plurality ofopenings 10 arranged on thelateral wall 8, as illustrated in the accompanying figures of the drawings. - In this way, the dust (i.e. the particles of abraded material produced during the use of the disc 1) which collects in the cup-
shaped portion 6 during the use of thedisc 1 is pushed, by effect of the rotation of thedisc 1, towards the periphery of the cup-shaped portion 6 (i.e. towards thelateral wall 8 thereof) and exits from thecup 6 through theopenings 10, preventing the dust from striking the abrasive material located on theannular portion 2 and clogging it to reduce its efficiency. - The
openings 10 preferably extend from thebottom wall 7 up to reaching theannular portion 2, in particular thesecond surface 4 thereof, such that the openings develop over the whole height of the cup-shaped portion 6 and ensure excellent disposal of the dust contained in the cup-shaped portion 6. - The height of the cup is the distance between the
bottom wall 7 and a plane passing through theannular portion 2, in particular thefirst surface 3 of the annular portion, measured on a straight line which is perpendicular to thebottom wall 7. - As illustrated in the figures of the drawings, the
openings 10 are identical to one another in dimensions and shape and are reciprocally equidistanced. - The dust is in this way expelled from the cup-
shaped portion 6 uniformly, i.e. not depending on the relative position of the dust inside the cup-shaped portion 6. - The
disc 1 advantageously comprises a plurality of walls 11 (seefigures 1 and 2 ) which develop between thehole 9 and thelateral wall 7 of the cup-shaped portion 7. - Each
wall 11 physically separates anopening 10 from anadjacent opening 10. - In this way two
adjacent walls 11 define, in combination with anopening 10 in thelateral wall 7 of the cup-shaped portion 6, adischarge channel 12, i.e. a space delimited by three walls and open at an end thereof. - The function of the
walls 11 and therefore thedischarge channels 12 is to direct the dust which accumulates in the cup-shaped portion 6 towards theopenings 10, preventing the dust from freely circulating internally of the cup-shaped portion 6 before being discharged through theopenings 10. - Thus the
walls 11 further increase the ability to discharge dust accumulated internally of the cup-shaped portion 6. - Each
discharge channel 12 preferably exhibits transversal sections which progressively increase in size going from thehole 9 towards thelateral wall 8 of thecup 6. - By transversal sections of the discharge channels are meant the sections of the discharge channels along a perpendicular plane to the
bottom wall 7 of the cup-shaped portion 6. - It has been noted that this type of development of the
discharge channels 12 ensures optimum clearing of the dust through theopenings 10 when thedisc 1 is set in rotation. - The
walls 11 defining eachdischarge channel 12 preferably have a spiral-portion development, such that eachwall 11 behaves like a blade of an impeller of a centrifugal ventilator. - This means that the
walls 11, in combination with theopenings 10 and thebottom wall 7 of the cup-shaped portion 6 are able to deviate a flow of dust striking thedisc 1 in perpendicular direction to thebottom wall 7 towards a substantially perpendicular direction to the incident dust flow direction, obviously when the disc is set in rotation. - The flow of dust, being deviated as described above, therefore strikes the
openings 10 in theside wall 8 of the cup-shaped portion 6 and exits from thedisc 1 without striking the first surface 3 (the surface which constrainingly receives the abrasive material) of theannular portion 2. - As illustrated in
figure 1 , the cup-shaped portion 6 further comprises acylindrical element 13 emerging from thebottom wall 7. - The
hole 9 is afforded in thecylindrical element 13 and is threaded. - In this way the
hole 9, apart from allowing passage of the chuck shaft of the tool, further enables the shaft to be constrained to thedisc 1 with no need for a locknut. - The chuck shaft screws directly into the threaded
hole 9, constraining thedisc 1 to the electric tool. - In particular, the threading of the
hole 9 is such that during rotation of thedisc 1 the forces acting on thedisc 1 tend to rotate thedisc 1 with respect to the chuck shaft in the screwing direction of the disc on the chuck shaft. - This characteristic ensures that during use the disc cannot loosen and free itself from the tool.
- Note that the lack of a locknut, or rather the presence of the
cylindrical element 13 bearing the threadedhole 9 enables the shape and dimensions of thedischarge channels 12 to be optimised. - In the preferred embodiment of the invention, the
cylindrical element 13 exhibits a height which is substantially identical to the height of thelateral wall 8 of the cup-shaped portion 6, such that thecylindrical element 13 is abreast of theannular portion 2. - The height of the cylindrical element is measured in the same way as described above, to define the height of the cup-
shaped portion 6. - The
walls 11 are connected to an external surface of the cylindrical element, such that eachdischarge channel 12 is separated from the adjacent one. - Further, each
wall 11 is preferably of a height (measured as above-indicated in relation to the height of the cup-shaped portion 6) which is substantially identical to that of thecylindrical element 13 and the cup-shapedportion 6. - Note that the fact that the
walls 11 are connected to the cylindrical element 13 (and thereefore there is no locknut) guarantees a synergic effect with the presence of thewalls 11, enabling optimum discharge of the dust which accumulates in the cup-shapedportion 6. - As indicated herein above, the
hole 9 enables a self-locking coupling between the disc and the tool. - A plurality of retaining
teeth 14 are fashioned from thecylindrical portion 13, whichteeth 14 are destined to retain a washer (not illustrated) for demounting the disc from the electric tool. - Once the
disc 1 has been installed on the electric tool, the washer is screwed on the shaft of the chuck and is lodged in the retainingteeth 14, thus being solidly constrained to thedisc 1. - To demount the disc it is necessary to unscrew the washer, thus also unscrewing the disc from the chuck shaft.
- In the preferred embodiment the retaining
teeth 14 are four in number and are equidistanced. - Further, the lower part of the cup-shaped
portion 6, i.e. the part facing the opposite direction with respect to the concavity which houses thewalls 11, comprises an annular undercut 15 which develops about thehole 9. - This undercut 15 has the function of self-centring the
disc 1 on the chuck shaft. - The invention as described achieves the set aims.
- The
openings 10 enable the dust collected in the cup-shapedportion 6 to be discharged without striking the surface of theannular portion 2 destined to receive the abrasive material. - This ensures excellent efficiency of the abrasive material during the use of the disc.
- Further, the
walls 11 increase the efficiency of the dust discharge. - The collaboration between the
openings 10 and thewalls 11, apart from increasing the expulsion efficiency of the dust, advantageously generates a flow of air which aids cooling of the portion of material subjected to surface abrasion. - The conformation of the
walls 11 and the absence of the locknut optimise efficiency of thewalls 11. - The presence of the
walls 11 increases the mechanical properties of theabrasive tool 1, giving it greater rigidity with respect to traditional tools in the prior art.
Claims (12)
- A disc for electric tools for supporting abrasive material, comprising:an annular portion (2) destined to retainingly receive abrasive material;a cup-shaped portion (6) which develops internally of the annular portion (2) and comprises a bottom wall (7) affording a central hole (9) for passage of a shaft of an electric tool chuck and a lateral wall (8) connecting the bottom wall (7) and the annular portion (2);characterised in that the cup-shaped portion (6) comprises a plurality of openings (10) arranged on the lateral wall (8).
- The disc of claim 1, comprising a plurality of walls (11) which develop between the hole (9) and the lateral wall (8) of the cup-shaped portion (6); each wall (11) of the plurality of walls (11) separating an opening (10) from an adjacent opening (10).
- The disc of claim 2, wherein two adjacent walls (11) define a discharge channel (12), in combination with the opening (10) of the lateral wall (8) of the cup-shaped portion (6).
- The disc of claim 4, wherein each discharge channel (12) exhibits transversal sections having dimensions which increase in a direction going from the hole towards the lateral wall (8) of the cup-shaped portion (6).
- The disc of claim 3 or 4 wherein the walls (11) defining each discharge channel (12) have a spiral portion development such as to realise a plurality of flow deviators.
- The disc of claim 1, wherein the openings (10) are identical and equidistanced.
- The disc of claim 1, wherein the cup-shaped portion (6) comprises a cylindrical element (13) emerging from the bottom wall (7); the hole (9) being afforded in the cylindrical element (13) and being threaded.
- The disc of claim 7, wherein the cylindrical element (13) exhibits a height which is substantially equal to a height of the lateral wall (7) of the cup-shaped portion (6), such that the cylindrical element (13) is abreast of the annular portion (2).
- The disc of claim 7 or 8, comprising a plurality of retaining teeth (14) emerging from the cylindrical element (13) destined to retain a washer for demounting the disc from the electric tool.
- The disc of claims 2 and 7, wherein the walls (11) are connected to an external wall of the cylindrical element (13).
- The disc of claim 10, wherein the walls (11) are of a height which is substantially equal to the height of the cylindrical element (13).
- An abrasive tool, comprising a disc according to one or more of claims from 1 to 11, and an abrasive material applied on an annular portion of the disc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200930041T SI2151302T1 (en) | 2008-08-05 | 2009-07-10 | A disc for supporting abrasive material, for electric tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRE2008A000075A IT1391160B1 (en) | 2008-08-05 | 2008-08-05 | DISK FOR ELECTRIC TOOLS FOR THE SUPPORT OF ABRASIVE MATERIAL. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2151302A1 true EP2151302A1 (en) | 2010-02-10 |
EP2151302B1 EP2151302B1 (en) | 2011-06-08 |
Family
ID=40548821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09165152A Active EP2151302B1 (en) | 2008-08-05 | 2009-07-10 | A disc for supporting abrasive material, for electric tools |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2151302B1 (en) |
AT (1) | ATE511952T1 (en) |
ES (1) | ES2365302T3 (en) |
IT (1) | IT1391160B1 (en) |
PT (1) | PT2151302E (en) |
SI (1) | SI2151302T1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPR20110007A1 (en) * | 2011-01-25 | 2012-07-26 | Campana Mirco E Figli S N C | DISK FOR ELECTRIC TOOLS, SUPPORTING ABRASIVE MATERIAL |
US20150283675A1 (en) * | 2014-04-04 | 2015-10-08 | Campana Mirco E Figli S.N.C. | Disc for power tools for supporting abrasive material and abrasive disc comprising said support |
IT201600117892A1 (en) * | 2016-11-22 | 2018-05-22 | Bdl S R L | Disc for electric tools for supporting abrasive material and method of making an abrasive disc comprising said support disc |
CN110722438A (en) * | 2019-09-12 | 2020-01-24 | 重庆市三叶家具有限责任公司 | Polishing equipment for steel-wood furniture processing |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012100088U1 (en) | 2012-01-11 | 2012-02-27 | Jobra Gmbh | Support plate for lamella grinding wheels |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998053955A2 (en) | 1997-05-28 | 1998-12-03 | Bogalo Adrian | An improved abrasive disc and backing plate therefor |
US20020146975A1 (en) | 2001-04-05 | 2002-10-10 | Seagle Donald Lee | Anti-theft coin monitoring sensor unit for a coin hopper dispenser |
EP1568440A1 (en) * | 2004-02-27 | 2005-08-31 | August Rüggeberg GmbH & Co. KG | Tool for Chip Removal |
EP1741515A1 (en) * | 2005-07-05 | 2007-01-10 | August Rüggeberg GmbH & Co. KG | Tool |
-
2008
- 2008-08-05 IT ITRE2008A000075A patent/IT1391160B1/en active
-
2009
- 2009-07-10 PT PT09165152T patent/PT2151302E/en unknown
- 2009-07-10 ES ES09165152T patent/ES2365302T3/en active Active
- 2009-07-10 SI SI200930041T patent/SI2151302T1/en unknown
- 2009-07-10 EP EP09165152A patent/EP2151302B1/en active Active
- 2009-07-10 AT AT09165152T patent/ATE511952T1/en active
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WO1998053955A2 (en) | 1997-05-28 | 1998-12-03 | Bogalo Adrian | An improved abrasive disc and backing plate therefor |
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EP1568440A1 (en) * | 2004-02-27 | 2005-08-31 | August Rüggeberg GmbH & Co. KG | Tool for Chip Removal |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPR20110007A1 (en) * | 2011-01-25 | 2012-07-26 | Campana Mirco E Figli S N C | DISK FOR ELECTRIC TOOLS, SUPPORTING ABRASIVE MATERIAL |
US20150283675A1 (en) * | 2014-04-04 | 2015-10-08 | Campana Mirco E Figli S.N.C. | Disc for power tools for supporting abrasive material and abrasive disc comprising said support |
IT201600117892A1 (en) * | 2016-11-22 | 2018-05-22 | Bdl S R L | Disc for electric tools for supporting abrasive material and method of making an abrasive disc comprising said support disc |
CN110722438A (en) * | 2019-09-12 | 2020-01-24 | 重庆市三叶家具有限责任公司 | Polishing equipment for steel-wood furniture processing |
Also Published As
Publication number | Publication date |
---|---|
ATE511952T1 (en) | 2011-06-15 |
IT1391160B1 (en) | 2011-11-18 |
ITRE20080075A1 (en) | 2010-02-06 |
ES2365302T3 (en) | 2011-09-28 |
EP2151302B1 (en) | 2011-06-08 |
PT2151302E (en) | 2011-07-12 |
SI2151302T1 (en) | 2011-08-31 |
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