EP3638471B1 - Improved handheld motorized cutting device and relative accessory - Google Patents
Improved handheld motorized cutting device and relative accessory Download PDFInfo
- Publication number
- EP3638471B1 EP3638471B1 EP18727424.6A EP18727424A EP3638471B1 EP 3638471 B1 EP3638471 B1 EP 3638471B1 EP 18727424 A EP18727424 A EP 18727424A EP 3638471 B1 EP3638471 B1 EP 3638471B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- hub
- blade
- motor shaft
- accessory equipment
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 17
- 238000005299 abrasion Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000284 resting effect Effects 0.000 claims 1
- 239000007779 soft material Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 239000002783 friction material Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction 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
- 230000001419 dependent effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B9/00—Portable power-driven circular saws for manual operation
- B27B9/02—Arrangements for adjusting the cutting depth or the amount of tilting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
- B27B5/29—Details; Component parts; Accessories
- B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
- B27B5/32—Devices for securing circular saw blades to the saw spindle
Definitions
- the present invention relates to a handheld motorized cutting device or tool, in particular a device with a rotating cutting blade, provided with an auxiliary accessory.
- motor rotating blade cutting devices of the handheld type.
- these devices comprise a freehand gripping motor unit, which carries at its end a free circular blade, generally a thin diamond disc, brought into rotation by the motor unit.
- the motor unit is inserted into a casing, provided externally with on/off switches, with handles to improve the retention by the operator and possibly with a safety blade protective shield.
- This device is light and not bulky, which is much appreciated because it promotes portability and does not tire the operator. Since it is very easy to use, however, this type of cutting tool lends itself to incorrect use, especially in the precarious conditions of a construction site.
- the tile or stone slab is fixed cantilevered on a support, for example by means of a clamp (or sometimes simply by the pressure of a foot), and then the operator performs cutting by starting the electric motor and bringing the rotating diamond disc to make the cut in the cantilevered part of the material.
- the problem presented here - particularly when the cut is longer than a few centimetres - is that the guide of the motorized device, for example along a line previously drawn on the tile surface, is difficult and leads to a not perfectly straight cut.
- the difficulty is inherent in the fact that the device is relatively light compared to the stresses that are transferred by the rotating blade, it must be supported freehand moving with the whole body and keeping it at a correct distance from the material plane to cut through the whole depth of the slab, but without abutting the surface of the material (because it could cause damage). Without lateral guidance and without the possibility of support, it is difficult to perform perfectly controlled cuts.
- Cutting devices operated freehand by the operator, which provide a support on the surface to be cut, are already available on the market: these are the disc saws for cutting small-thickness timber. These devices include, especially for safety reasons, a cage which - mounted on the casing of the drive motor, centred on the shaft of the toothed disc saw - is provided with an adjustable flat frame, intended to rest on the surface of the wood plane to be cut. This frame, which comprises a cutout through which the disc saw passes, is adjustable in position, so as to predetermine the height of the cutting disc with respect to the material plane.
- US2010/0122617 discloses a supporting arrangement for a cutting tool.
- a cutting blade is mounted directly on a shaft, while a supporting ring is mounted with an inner ring of a rotating bearing directly fit on the same shaft.
- a similar arrangement is disclosed in US 2005/0183562 .
- US 2831514 discloses a supporting arrangement for a cutting tool according to the preamble of the main claim.
- This arrangement includes a hub with an inner smooth hole to be fit on a smooth shaft; the hub is integral in rotation with an inner ring of a bearing; the cutting blade is mounted directly on the shaft.
- a rotary blade handheld cutting device comprises, in a per se known manner, a casing 1, inside which an electric drive motor (not shown in the drawings) is arranged which ends with a motor shaft 1a, on which standard tools are applied.
- the end of the motor shaft 1a which protrudes out of the casing 1 has a calibrated cylindrical section on which a stop flange is fit, integral in rotation, provided with a cylindrical protrusion which acts as a coupling and centring means for a central hole 2a of a cutting disc 2 (for example a diamond disc); the shaft 1a then terminates with a standard threaded portion, on which a clamping flange 1b adapted to hold the cutting disc 2 against the abutment flange is designed to be engaged, so as to prevent any relative movement between the disc and the shaft 1a.
- a cutting disc 2 for example a diamond disc
- a support accessory on the motor shaft 1a, which provides a ring idle with respect to the shaft 1a, which acts as a support on a surface of the material to be cut.
- the support accessory consists of a bearing body 4 on whose ring or outer track a support ring or wheel 5 is integral.
- the bearing 4 is dimensioned in such a way that it can be fit centred on the shaft 1a.
- the inner ring or track of the bearing 4 is integral with a hub 6 provided with a central hole, designed to house the threaded end portion of the motor shaft 1a.
- This central hub 6 is coupled to the inner ring of the bearing 4, for example, on one side, with an abutment surface 6a and, on the other, by a Seeger TM circlip 6b.
- the hub 6 has a threaded central hole 6c of a diameter equal to the nominal diameter of the motor shaft 1a. At one end of the hub 6, manoeuvring holes 6' are also provided.
- the hub 6 has a circular protrusion 6r (visible only in fig. 1 ) on which the central hole 2a of the cutting disc 2 is centred, typically the hole 2a being of diameter greater than the diameter of the motor shaft 1a.
- the abutment flange (supplied as standard equipment of the tool) is removed from the motorized device and, using an appropriate tool (not shown) to act on the holes 6', the hub 6 is tightened strongly against the abutment surface of the motor shaft 1a.
- the support ring 5 integral with the outer ring of the bearing 4 has a modest thickness (axial size), for example less than 1 cm or preferably 0.8 cm, so that the motor shaft 1a can pass through the hole 6c and protrude by a sufficient extent (as shown in fig. 1 ) to be able to still house on its axis both a cutting disc 2, centred on the protrusion 6r, and a relative clamping flange 1b ( figs. 2 and 3 ) intended to clamp closely the disc 2 against the hub 6 of the bearing 4, which in turn is integral in rotation with the motor shaft 1a.
- the hub 6 of the bearing 4 preferably has a width greater than that of the outer ring and of the support ring 5 integral with it, so that the two lateral bearing surfaces of the hub - on one side against the abutment surface of the shaft 1a, on the other side against the cutting disc 2 which is in contact with it - are external to the two laying planes of the outer ring of the bearing and of the support ring 5. In this way, the support ring 5 remains free to rotate idly in close proximity to the side surface of the cutting disc 2.
- the cutting disc 2 is in a position along the motor shaft 1a not too far from the original design, so as to avoid interference with the possible protective shield 3.
- the bearing 4 After fitting it on the shaft 1a and clamping it in place with the cutting disc 2 and the clamping ring 1b, the bearing 4 is thus on one hand, with its inner ring locked between the abutment of the motor shaft and the disc 2 and, on the other hand, with its outer ring being freely rotating. Accordingly, the accessory remains centrally locked and integral with the motor shaft 1a, so as to adequately transmit the rotary motion to the cutting disc 2, while it has the support ring 5 in idle condition, which therefore can also remain stationary while the inner ring rotates.
- the support ring 5 has an external radius which is smaller than the radius of the cutting disc 2 of an extent equal to the working band of the disc, for example of 2-3 cm.
- the support ring 5 can be used as a support means on the surface of the material to be cut, by causing the blade of the disc 2 to penetrate in the material by a measure equal to the aforementioned working band.
- the operator no longer having to make the effort to support the motorized device at a certain height, can concentrate his intervention and his attention to guide the cutting disc along the specially arranged cutting line.
- the outer surface of the support ring 5 must preferably have a finish such as not to cause scratches or marks on the finished surface of the material to be cut.
- the whole support ring 5 can be made of plastic material, for example of a low-friction material such as Teflon TM , or it can be made of metallic material (for example steel or aluminum alloy) coated with a softer material.
- the periphery of the support ring must have either an anti-abrasion material (such as Teflon TM ) or a high friction material surface, so that the support ring does not ideally slide but rather tends to roll, at the advancement of the tool in the cut, without marking the surface.
- the central hub 60 on which the bearing 4 is mounted has a central hole 61 with a larger diameter than that of the motor shaft 1a, in particular a hole corresponding to the standard hole of circular blades (for example, with a 22 mm diameter) .
- the hub 60 can be centred on a standard abutment flange If of the motorized tool.
- the support accessory according to the invention further comprises a modified clamping flange 62, consisting of a cylindrical centring body 62' and a flat head flange 62", centrally crossed by a threaded hole 63 adapted to engage with the threaded portion of the motor shaft 1a.
- the outer diameter of the cylindrical centring body 62' is equal to the central hole 2 of the circular blade 2.
- the clamping flange 62 acts both as a centring element of the blade 2, acting from the inside of the hole 2a, and as a clamping element of the blade 2 against the hub 60.
- the cylindrical centring body 62' has a size such that it extends inside the hole 61 of the hub 60, so as to be coupled for a significant length with the threaded portion of the shaft 1a.
- the extension of the cylindrical body 62' is nevertheless less than the depth of the hole 61.
- the support ring 5 has been shown as a separate piece from the bearing 4, it is not excluded that the support ring consists of a circular coating layer of the outer track of the bearing 4 itself.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
- The present invention relates to a handheld motorized cutting device or tool, in particular a device with a rotating cutting blade, provided with an auxiliary accessory.
- As has long been known, in cutting hard materials such as tiles and stone slabs, it is often necessary to use motor rotating blade cutting devices of the handheld type. In particular, these devices comprise a freehand gripping motor unit, which carries at its end a free circular blade, generally a thin diamond disc, brought into rotation by the motor unit.
- The motor unit is inserted into a casing, provided externally with on/off switches, with handles to improve the retention by the operator and possibly with a safety blade protective shield.
- This device is light and not bulky, which is much appreciated because it promotes portability and does not tire the operator. Since it is very easy to use, however, this type of cutting tool lends itself to incorrect use, especially in the precarious conditions of a construction site.
- Typically, to make a cut, the tile or stone slab is fixed cantilevered on a support, for example by means of a clamp (or sometimes simply by the pressure of a foot), and then the operator performs cutting by starting the electric motor and bringing the rotating diamond disc to make the cut in the cantilevered part of the material.
- The problem presented here - particularly when the cut is longer than a few centimetres - is that the guide of the motorized device, for example along a line previously drawn on the tile surface, is difficult and leads to a not perfectly straight cut. The difficulty is inherent in the fact that the device is relatively light compared to the stresses that are transferred by the rotating blade, it must be supported freehand moving with the whole body and keeping it at a correct distance from the material plane to cut through the whole depth of the slab, but without abutting the surface of the material (because it could cause damage). Without lateral guidance and without the possibility of support, it is difficult to perform perfectly controlled cuts.
- Cutting devices operated freehand by the operator, which provide a support on the surface to be cut, are already available on the market: these are the disc saws for cutting small-thickness timber. These devices include, especially for safety reasons, a cage which - mounted on the casing of the drive motor, centred on the shaft of the toothed disc saw - is provided with an adjustable flat frame, intended to rest on the surface of the wood plane to be cut. This frame, which comprises a cutout through which the disc saw passes, is adjustable in position, so as to predetermine the height of the cutting disc with respect to the material plane.
- However, such an arrangement cannot be transferred as it is to the field of cutting of slabs of hard material, because the vibrations of the tool frame would cause unwanted micro-scratches on the finished surface of the slabs. As a consequence, the motorized tools are still used freehand, in a floating way, with the risk of making cuts that are not perfectly straight and therefore not acceptable for a good finishing job.
- Some other circular equipment has been already disclosed to support a cutting blade on the surface of the same material to be cut.
-
US2010/0122617 discloses a supporting arrangement for a cutting tool. In this case a cutting blade is mounted directly on a shaft, while a supporting ring is mounted with an inner ring of a rotating bearing directly fit on the same shaft. A similar arrangement is disclosed inUS 2005/0183562 . -
US 2831514 discloses a supporting arrangement for a cutting tool according to the preamble of the main claim. This arrangement includes a hub with an inner smooth hole to be fit on a smooth shaft; the hub is integral in rotation with an inner ring of a bearing; the cutting blade is mounted directly on the shaft. - It is therefore an object of the present invention to provide an accessory for a handheld, circular blade motorized cutting device which allows to obtain a considerable improvement, with respect to the prior art, in the execution of perfectly controlled cuts. This object is achieved by the features mentioned in
claim 1. The dependent claims describe preferred features of the invention. - Further features and advantages of the invention will anyhow be more evident from the following detailed description, given by mere way of non-limiting example and illustrated in the accompanying drawings, wherein:
-
fig. 1 is an overall perspective view of a motorized cutting tool provided with the accessory according to a first embodiment of the invention, without a cutting disc; -
fig. 2 is a view similar toFig. 1 , with a mounted cutting disc not according to the invention; -
fig. 3 is a view similar to that offig. 2 according to a different perspective; -
fig. 4A is a perspective exploded view of the embodiment offig. 2 ; -
fig. 4B is a view similar to that offig. 4A of an embodiment according to the invention; and -
fig. 5 is a perspective exploded view of a part of the accessory according to the invention. - In the appended figures, an accessory according to the invention is well represented in its entirety applied to a cutting device which, as it is known per se, is not illustrated in each single detail.
- In fact, a rotary blade handheld cutting device comprises, in a per se known manner, a
casing 1, inside which an electric drive motor (not shown in the drawings) is arranged which ends with amotor shaft 1a, on which standard tools are applied. - Typically, the end of the
motor shaft 1a which protrudes out of thecasing 1 has a calibrated cylindrical section on which a stop flange is fit, integral in rotation, provided with a cylindrical protrusion which acts as a coupling and centring means for acentral hole 2a of a cutting disc 2 (for example a diamond disc); theshaft 1a then terminates with a standard threaded portion, on which aclamping flange 1b adapted to hold thecutting disc 2 against the abutment flange is designed to be engaged, so as to prevent any relative movement between the disc and theshaft 1a. - Most of the
cutting disc 2 rotates freely overhanging from the motor shaft and only aprotective shield 3 is provided, on the side facing the operator, to protect against any splinters projected from the disc. - According to the present invention, it is also envisaged to install a support accessory on the
motor shaft 1a, which provides a ring idle with respect to theshaft 1a, which acts as a support on a surface of the material to be cut. - In particular, the support accessory consists of a bearing
body 4 on whose ring or outer track a support ring orwheel 5 is integral. - The
bearing 4 is dimensioned in such a way that it can be fit centred on theshaft 1a. Preferably, the inner ring or track of thebearing 4 is integral with ahub 6 provided with a central hole, designed to house the threaded end portion of themotor shaft 1a. - This
central hub 6 is coupled to the inner ring of thebearing 4, for example, on one side, with anabutment surface 6a and, on the other, by a Seeger™circlip 6b. - According to a first embodiment not according to the invention (
Fig. 4A ), thehub 6 has a threadedcentral hole 6c of a diameter equal to the nominal diameter of themotor shaft 1a. At one end of thehub 6, manoeuvring holes 6' are also provided. - Moreover, at the end facing the
cutting disc 2, thehub 6 has acircular protrusion 6r (visible only infig. 1 ) on which thecentral hole 2a of thecutting disc 2 is centred, typically thehole 2a being of diameter greater than the diameter of themotor shaft 1a. - For the assembly, the abutment flange (supplied as standard equipment of the tool) is removed from the motorized device and, using an appropriate tool (not shown) to act on the holes 6', the
hub 6 is tightened strongly against the abutment surface of themotor shaft 1a. - The
support ring 5 integral with the outer ring of thebearing 4 has a modest thickness (axial size), for example less than 1 cm or preferably 0.8 cm, so that themotor shaft 1a can pass through thehole 6c and protrude by a sufficient extent (as shown infig. 1 ) to be able to still house on its axis both acutting disc 2, centred on theprotrusion 6r, and arelative clamping flange 1b (figs. 2 and 3 ) intended to clamp closely thedisc 2 against thehub 6 of thebearing 4, which in turn is integral in rotation with themotor shaft 1a. - As shown in
fig. 1 , thehub 6 of thebearing 4 preferably has a width greater than that of the outer ring and of thesupport ring 5 integral with it, so that the two lateral bearing surfaces of the hub - on one side against the abutment surface of theshaft 1a, on the other side against thecutting disc 2 which is in contact with it - are external to the two laying planes of the outer ring of the bearing and of thesupport ring 5. In this way, thesupport ring 5 remains free to rotate idly in close proximity to the side surface of thecutting disc 2. - Due to the modest thickness of the accessory according to the invention, once assembled, the
cutting disc 2 is in a position along themotor shaft 1a not too far from the original design, so as to avoid interference with the possibleprotective shield 3. - After fitting it on the
shaft 1a and clamping it in place with thecutting disc 2 and theclamping ring 1b, thebearing 4 is thus on one hand, with its inner ring locked between the abutment of the motor shaft and thedisc 2 and, on the other hand, with its outer ring being freely rotating. Accordingly, the accessory remains centrally locked and integral with themotor shaft 1a, so as to adequately transmit the rotary motion to thecutting disc 2, while it has thesupport ring 5 in idle condition, which therefore can also remain stationary while the inner ring rotates. - The
support ring 5 has an external radius which is smaller than the radius of thecutting disc 2 of an extent equal to the working band of the disc, for example of 2-3 cm. - With this configuration, the
support ring 5 can be used as a support means on the surface of the material to be cut, by causing the blade of thedisc 2 to penetrate in the material by a measure equal to the aforementioned working band. - This therefore allows the operator to work equally freehand for guiding cutting, nevertheless placing the
support ring 5 of the tool on the surface to be cut in close proximity to the cutting line, due to the fact that thesupport ring 5 remains idle with respect to the rotation of thecutting disc 2. - So, the operator, no longer having to make the effort to support the motorized device at a certain height, can concentrate his intervention and his attention to guide the cutting disc along the specially arranged cutting line.
- For this supporting function, at least the outer surface of the
support ring 5 must preferably have a finish such as not to cause scratches or marks on the finished surface of the material to be cut. To this purpose, thewhole support ring 5 can be made of plastic material, for example of a low-friction material such as Teflon™, or it can be made of metallic material (for example steel or aluminum alloy) coated with a softer material. To avoid scratching the surface of the material to be cut, the periphery of the support ring must have either an anti-abrasion material (such as Teflon™) or a high friction material surface, so that the support ring does not ideally slide but rather tends to roll, at the advancement of the tool in the cut, without marking the surface. - For some models of motorized device, in which there is a risk that the accessory according to the invention interferes with the
protective shield 3 or with thecasing 1, it is preferable to keep the standard abutment flange in position. In this case, the thickness of thehub 6 would end up excessively reducing the length of the threaded end of theshaft 1a. - Therefore, according to the invention (
fig. 4B ), thecentral hub 60 on which thebearing 4 is mounted has acentral hole 61 with a larger diameter than that of themotor shaft 1a, in particular a hole corresponding to the standard hole of circular blades (for example, with a 22 mm diameter) . In this way, thehub 60 can be centred on a standard abutment flange If of the motorized tool. - In this case, the support accessory according to the invention further comprises a modified
clamping flange 62, consisting of a cylindrical centring body 62' and aflat head flange 62", centrally crossed by a threaded hole 63 adapted to engage with the threaded portion of themotor shaft 1a. - The outer diameter of the cylindrical centring body 62' is equal to the
central hole 2 of thecircular blade 2. In this way, the clampingflange 62 acts both as a centring element of theblade 2, acting from the inside of thehole 2a, and as a clamping element of theblade 2 against thehub 60. - The cylindrical centring body 62' has a size such that it extends inside the
hole 61 of thehub 60, so as to be coupled for a significant length with the threaded portion of theshaft 1a. The extension of the cylindrical body 62' is nevertheless less than the depth of thehole 61. - It is to be understood, however, that the invention is not limited to the particular configurations illustrated above, which constitute only non-limiting examples, but that numerous variations are possible, without departing from the scope of the invention as defined by the following claims.
- For example, although a cutting tool has always been shown in which the support ring is located between the motor shaft and the cutting disc, it is also possible to foresee - in some working conditions - that the operator prefers to mount the
support ring 5 between the clamping flange and thecutting disc 2. - Again, although the
support ring 5 has been shown as a separate piece from thebearing 4, it is not excluded that the support ring consists of a circular coating layer of the outer track of thebearing 4 itself.
Claims (7)
- Accessory equipment for a motorized and handheld rotary blade cutting device, comprising a hub to be coupled to a motor body of said device, coaxially to a motor shaft (1a), and a supporting surface suitable for resting on a surface of a material to be cut, wherein said hub (6, 60) is integral with an inner ring of a rotating bearing (4) having a central hole adapted to be fitted coaxially on said motor shaft (1a) of said motorized cutting device, and wherein said supporting surface is constituted by a support ring (5) which is integral in rotation to an outer ring of said rotating bearing (4), characterized in thata clamping flange (62) is also provided, consisting of a cylindrical centring body (62') and a flat head flange (62"), crossed centrally by a threaded hole (63),an outer diameter of said cylindrical centring body (62' ) being equal to a central hole (2a) of a circular blade (2) to be used with said cutting device, so that said clamping flange (62) acts both as a centring element of said blade (2), acting from the inside of said hole (2a), and as a clamping element of said blade (2) against said hub (60).
- Accessory equipment as in 1, wherein the axial size of said support ring (5) is lower than the axial size of at least said inner ring of the rotating bearing (4).
- Accessory equipment as in 2, wherein said axial size is less than 1 cm, preferably less than 0.8 cm.
- Accessory equipment as in 1, 2 or 3, wherein said support ring (5) has at least said peripheral surface made of an anti-abrasion material or a high-friction soft material.
- Accessory equipment as in any one of the preceding claims, wherein said hub (6) has an axial threaded hole (6c) and at one end thereof there is provided a circular centring protrusion (6r).
- Handheld motorized cutting tool assembly comprising a hand-held casing (1) containing an electric motor provided with a motor shaft (1a), projecting from the outside of the casing, provided with a base abutment surface and a threaded end portion, a cutting disc (2) and a clamping flange being closely locked on said motor shaft (1a), characterized in that an accessory equipment as in any of the preceding claims is also locked between said clamping flange ( 62) and said abutment surface.
- Tool assembly as in 6, wherein an outer diameter of said cylindrical centring body (62') is equal to a central hole (2a) of said cutting blade (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT201700064845 | 2017-06-12 | ||
PCT/IB2018/052758 WO2018229563A1 (en) | 2017-06-12 | 2018-04-20 | Improved handheld motorized cutting device and relative accessory |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3638471A1 EP3638471A1 (en) | 2020-04-22 |
EP3638471B1 true EP3638471B1 (en) | 2022-06-29 |
Family
ID=62245366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18727424.6A Active EP3638471B1 (en) | 2017-06-12 | 2018-04-20 | Improved handheld motorized cutting device and relative accessory |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3638471B1 (en) |
CN (1) | CN111225775B (en) |
ES (1) | ES2923386T3 (en) |
WO (1) | WO2018229563A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4171912A1 (en) * | 2020-06-25 | 2023-05-03 | Festool GmbH | Circular saws with pivot assemblies and pivot bias mechanisms |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2831514A (en) * | 1957-02-25 | 1958-04-22 | Avard Paul | Machine for slitting the bark of logs |
US7156011B2 (en) * | 2004-02-25 | 2007-01-02 | The Boeing Company | Depth limiting safeguard for channel machining |
DE102006001986A1 (en) * | 2006-01-16 | 2007-07-19 | Robert Bosch Gmbh | Clamping device for releasably securing a disc-shaped tool |
JP2010123683A (en) * | 2008-11-18 | 2010-06-03 | Nec Electronics Corp | Dicing apparatus and adaptor for dicing apparatus |
JP6108999B2 (en) * | 2013-07-18 | 2017-04-05 | 株式会社ディスコ | Cutting equipment |
-
2018
- 2018-04-20 EP EP18727424.6A patent/EP3638471B1/en active Active
- 2018-04-20 ES ES18727424T patent/ES2923386T3/en active Active
- 2018-04-20 CN CN201880049769.9A patent/CN111225775B/en active Active
- 2018-04-20 WO PCT/IB2018/052758 patent/WO2018229563A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN111225775B (en) | 2021-07-13 |
WO2018229563A1 (en) | 2018-12-20 |
ES2923386T3 (en) | 2022-09-27 |
EP3638471A1 (en) | 2020-04-22 |
CN111225775A (en) | 2020-06-02 |
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