• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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    • 专利摘要:
    grinding body. the invention relates to a grinding body (6) for a grinding tool with a grinding layer (8) having at least one binder (12) and grinding grains (13) characterized in that in grinding layer (8) thermochromic dyes are integrated. the invention furthermore relates to a grinding tool (1) with the grinding body (6) according to the invention and means (5) for connecting the grinding tool (1) with a drive device for the grinding body swivel drive (6). the invention also encompasses the use of the grinding body (6) according to the invention or the grinding tool (1) according to the invention for the treatment of points on the human body.
    公开号:BR112015025610B1
    申请号:R112015025610-4
    申请日:2014-04-11
    公开日:2021-08-03
    发明作者:Bernhard Runden；Gerd Fischer
    申请人:Lukas-Erzett Vereinigte Schleif- Und Frãswerkzeugfabriken Gmbh & Co. Kg；
    IPC主号:
    专利说明:

    Description
    [001] The present invention relates to a grinding body for a grinding tool with a grinding layer that has at least one binder and grinding grains. Furthermore, the present invention relates to a grinding tool with such a grinding body. Also, the present invention relates to the use of a grinding body of this type, i.e. a grinding tool of this type.
    [002] Grinding bodies and grinding tools of this kind are known and are used, for example, for metalworking or woodworking for the production of dentures or for the care of manicure feet. As in the grinding processes, a high thermal subjection can occur temporarily and in localized points, it is always necessary to interrupt the grinding process in order to cool the grinding body and the areas to be worked. Furthermore, it is known to cool the grinding body during the grinding process in order to avoid pain resulting from heat to the patient or heat damage to a workpiece.
    [003] A grinding tool of the species initially mentioned is described, for example, in the document DE 20 2007 012 818 U1. The known grinding tool from this publication is used in the field of podiatry and features a grinding body in the form of a cover. The grinding body consists of a metallic support layer over which a grinding layer is applied. Furthermore, a drive device for the rotary drive of the grinding cap is part of the grinding tool, whereby the drive device and the grinding cap are interconnected by means of a tension rod. To cool the grinding body during the grinding process, cooling holes are provided in the grinding body, through which, from the inside, cooling air flows to the area to be treated.
    [004] It is perceived as disadvantageous that cooling - precisely in longer treatments - cannot totally eliminate the heat arising from grinding, so that localized heat damage can occur. To avoid this occurrence, for example, a podiatrist will have to ask his patient to inform him when the treatment becomes uncomfortable for him due to the heat. However, the risk of suffering burns during treatment, among other things, in diabetics is especially high because their sense of temperature perception in their feet is often impaired.
    [005] From document DE 20 2009 006 069 U1 a polishing disc made of a polyurethane foam became known. The soft polishing wheel features thermochromic dyes in order to optically indicate to a user, through alterations, that the polishing wheel is getting too hot and can therefore damage the paint surface. Thermochromic dyes are included in microcapsules which during the production of the polishing wheel are mixed into the soft foam. The microcapsules also contain a thermoplastic resin with a low melting point as well as an activating bond. So that harmful temperature increases to the paint surface during the polishing process can be visually perceived, the thermochromic dye changes at a certain temperature of sudden color change. The thermoplastic resin with a low melting point, in the range of this sudden color change temperature, has its melting area, so that, by melting the resin, the thermochromic dye can react with the activating bond.
    [006] It is perceived as a disadvantage that the thermoplastic resin needs to initially fuse before the thermochromic dye can change. Furthermore, the production of the polishing disc is complete because the thermochromic dyes need to be bonded together with the activation bond and the thermoplastic resin in the microcapsules so that these are then mixed into the soft foam. Furthermore, it is a disadvantage that with the soft foam, finishing steps with removal of trimming or cutting cannot be carried out on surfaces of materials to be treated.
    [007] Based on this state of the art, it is a task of the present invention to offer a grinding body, that is, a grinding tool, through which damage resulting from heat or pain in points to be treated during a method of production with chip removal. Furthermore, it is the task of the present invention to provide a use of such a grinding body or such a grinding tool, whereby damage or pain resulting from heat at the points to be treated of a human patient is avoided.
    [008] To solve this task, the present invention proposes a grinding body of the species initially mentioned, in which thermochromic dyes are provided within the grinding layer.
    [009] According to the invention, the effect of thermochromia will be used, according to which, certain substances, in heating, that is, in cooling, change their color. In this way, a user of the grinding body, for example a podiatrist or a mechanic, can recognize the intensity of the heat especially from the external face of the grinding body. In this way, the user will be able to interrupt, in a timely manner, the grinding process in order to avoid overheating the point to be treated. In this way, the grinding body according to the invention is particularly suitable for treating patients, for example in the field of podiatry, manicures or the dental field. In addition, the grinding body can also be used for grinding work on materials where overheating by frictional heat arising in the grinding process must be safely avoided.
    [0010] It is preferred that the grinding body is made up of several layers, having a backing layer. The backing layer can consist, for example, of a carrier of a stably rigid grinding product, metal or other stably material. Alternatively, the backing layer can also be a flexible backing layer of a grinding product of a fabric, especially cotton. For example, the backing layer can be provided with cotton with an impregnated mass onto which the grinding layer with at least one binder can in particular be directly applied. On the other hand, the grinding body can also operate without a backing layer. This occurs especially when the grinding body is configured as elongated grinding pins or disc-shaped grinding stones.
    [0011] Advantageously, thermochromic dyes comprise a quantity of thermochromic color pigments with the same properties or at least a mixture of several thermochromic color pigments. Alternatively, or on an additional basis, thermochromic dyes may comprise a thermochromic dye or at least a mixture of different thermochromic dyes. The thermochromic dye stands out because it is soluble bound in the grinding layer, especially in at least one binder, while thermochromic color pigments are generally indissoluble, being mixed in the grinding layer, especially by the less, in a binder.
    [0012] Conveniently, provision is made for the grinding layer to consist of several layers, having at least one internal binding layer and one outer binding layer. In other words, the grinding layer has a multilayer constitution with several binder layers, and the expression of binder layers should be understood as those layers that have a binder. Basically, in addition to the internal and external bonding layer, other intermediate bonding layers can be provided in the grinding layer, so that more than two of the aforementioned bonding layers are also possible.
    Advantageously, the inner binder layer is configured as a forming layer with at least one binder, and the outer binder layer is formed as a cover layer with another binder. Basically, for the forming layer and for the covering layer, the same binder can also be used. In the example of the two-layer constitution of the grinding layer, it will be applied in particular directly to a support layer, an internal bonding layer, ie the forming layer. The grinding grains will be applied to the forming layer, and they can be spread especially electrostatic or mechanically. At least one forming layer binder holds the grinding grains within the grinding layer to prevent grain breakage. Then, an external bonding layer, namely the covering layer, will be applied over the formation layer. Through the covering layer, the fixation of the grinding grains in the grinding layer will be improved. By constituting the grinding layer in several layers, therefore, the danger of grain breakage will be clearly reduced. The end cover layer does not form a flat, smooth and final surface of the grinding layer, but, by virtue of the grinding bodies that partially protrude from the forming layer, it constitutes a fragmented and uneven grinding surface. With the start of the grinding process, with a new grinding body, the areas of the cover layer around the grinding grains will be initially thinned, whereby the grinding grains are released by areas. With the progressive use of the grinding body, progressively larger areas of the cover layer will be thinned out until this cover layer is completely worn out. By the multilayer constitution of the grinding layer, the grinding grains, also after degradation of the covering layer, are at least still retained by the forming layer. When the grinding body does not have a supporting layer, as can occur, for example, in elongated grinding stones or round grinding discs, the grinding body only has the grinding layer with several binder layers, to which they are attached the grinding grains.
    [0014] Furthermore, in the covering layer, at least one other covering layer may be provided, for example, a non-stick layer, in order to prevent an adhesion of dust particles from the grinding on an external face of the grinding body. In this way, during the grinding process, clogging of the grinding body will be reduced. In this case, the non-stick layer can be provided not only as the outermost layer on the grinding body, but it can also be imbedded in one of the bonding layers of the grinding body.
    [0015] According to one aspect of the present invention, it is provided that the internal bonding layer is free of thermochromic dyes. Especially, thermochromic dyes are only provided in the covering layer. In this way, the user, when using the grinding body, can check not only its external surface temperature, but recognizes by the scraped material from the colored cover layer, at least in the predetermined temperature areas, recognizes the degree of wear of the body of grinding. In addition, the cover layer with thermochromic dyes can also be later applied to a grinding body in order to equip conventional grinding bodies with thermochromic dyes. In addition, in addition to the cover layer, other binding layers may also be provided, especially intermediate binding layers between the forming layer and the cover layer, containing thermochromic dyes, so that the wear of different binding layers.
    [0016] So that thermochromic dyes can be better recognized by the outside, the binder of the cover layer can be a transparent binder. Furthermore, the acquired color of the thermochromic dyes through the binder will not be falsified and layers positioned below the covering layer with their own colors, if necessary, can be better recognized. Particularly good results were obtained by the fact that the binder of the covering layer is a transparent duroplastic material, ie a transparent duroplastic binder. In this way, in the covering layer or in an intermediate binding layer, a possibly transparent and colorless resin may be inserted, and filling materials may be dispensed with, to a greater extent, with the exception of any added thermochromic dyes and/or grinding grains . Preferably, the resin portion of the covering layer, minus the grinding grains, after hardening, is greater than 70%, especially 95%, and preferably greater than 95%. By the at least essentially transparent, translucent or low-covering covering layer, it will be ensured that in the event of wear of the covering layer, its covering strength progressively decreases. In this way, between the thermochromic dyes of the covering layer and a possible underlying dyed layer, mixed colors may appear, so that the user of the grinding body can recognize continuous wear of the grinding layer until the covering layer is completely thinned.
    [0017] Preferably, the forming layer binder may be an organic or inorganic binder. For example, it could be a resin that does not melt in the temperature range that occurs during the grinding process, or it could be a ceramic binder. In bonded ceramic grinding means, the inorganic binder of the forming layer may be situated between the grinding grains, for example, ceramic or glass. The top coat will then be applied in a second step, after burning the inorganic binder.
    [0018] According to the aspect of the present invention, in the deformation layer, thermochromic dyes are not provided. This, however, does not exclude that thermochromic dyes may also be provided in the forming layer. For example, the non-thermochromic dye may have a red color of its own. In this way, different color changes can be carried out, and here, as an example, a possible color change is explained: thermochromic dyes are, for example, provided only in the covering layer and present a mixture of thermochromic dyes covering two groups differentiated from thermochromic ink pigments. The first group has blue thermochromic pigments that become transparent at a sudden color change temperature of 40 °C, and the second group has yellow thermochromic color pigments that at a sudden color change temperature of 60 °C C become transparent. The forming layer is here dyed red with a non-thermochromic dye. This results in a mixed color at the temperature which makes the grinding layer have a green tint. Increasing the temperature of the grinding layer above 40°C, then the grinding wheel will be yellow and above 60°C it will be red. When the relative amount of blue thermochromic color pigments is increased, relative to monochrome yellow color pigments, the color path could look like this: At room temperature, the grinding layer is blue to blue/green. Around 40 °C the color of the grinding layer changes from green to green/yellow and above 60 °C this layer will be red. In addition to the possibility of determining the temperature of the grinding layer, the dyed formation layer makes it possible to better understand the wear of the covering layer. When using the grinding body, the cover layer will be removed in place until it is worn out. The grinding grains wear out over time and/or become obtuse, so the used grinding body, due to the larger grinding surface, produces more friction value than a new grinding body. When the covering layer is removed, or when it is completely worn out, there is an increased risk of an escape of grinding grains from the forming layer. By the color of the forming layer, therefore, the degree of wear of the grinding layer provided with thermochromic dyes can be recognized from the inside.
    [0019] In addition, on a surface of the support layer, facing the direction of the grinding surface, a non-thermochromic paint may be applied. In this way, another possibility will be offered for recognizing the degree of wear of the grinding body, which can be well recognized in the case of a transparent forming layer.
    [0020] Preferably, at least a partial amount of the grinding grains is configured transparent. Especially, all grinding grains can be transparent. As transparent grinding grains, they are particularly suitable for single crystal corundum grinding grains. Due to the transparent configuration of the grinding grains, the thermochromic dyes and any non-thermochromic dyes foreseen can be better recognized and their colors will not be falsified by a specific color of the grinding grains.
    [0021] In addition or alternatively, with respect to the transparent grinding grains, at least a partial amount of the grinding grains can be configured colored. Especially, all grinding grains can be colored. Depending on the grinding task to be performed, differentiated grinding grains can be advantageous, so that they can be used not only, or instead of transparent single crystal corundums, for example, noble, red, green or silicon carbide corundum. white grinding grains, eg ceramic grains, sol-gel corundum, ie white noble corundum. In colored grinding grains, the color of the forming layer by mixing the binder of the forming layer with non-thermochromic dyes could match the color of the grinding grains.
    [0022] In order to be able to obtain especially good grinding results with the grinding body, the grinding grains can have a grain size between 30 and 1400 micrometers. With the extensive large grain sizes, the grinding space between the grinding grains is such that the grinding bodies are not obstructed, for example, when grinding hardened skin on human feet. If, on the other hand, the space for grinding is too small, the grinding volume, i.e. the grinding capacity of the grinding body, will be reduced increasing the danger that the grinding body and the patient, i.e., the segment to be treated, are damaged by a rapidly rising external surface temperature of the grinding body.
    [0023] Preferably, thermochromic dyes encompass reversible and/or irreversible thermochromic dyes. In the example of a dark colored thermochromic dye, in a cold state, for example, at room temperature, the user can be signaled an increase in temperature by changing the color. Thermochromic dyes that are initially dark, for example, through a sudden change in color to red, may indicate an increase in temperature. In this way, the user can easily determine the temperature of the external surface of the grinding body. If reversible dyes are used, for example, the user will be indicated by changing the color, not only heating the grinding body, but also its cooling, because the cooling body, in a cooled state, will regain its color original. If additional or alternatively irreversible dyes are used, the user can be permanently indicated that the grinding body has been operated, for example, above a maximum allowable external surface temperature, whereas in the maximum allowable external surface temperature, a change is foreseen. sudden color irreversible. In this way, it is permanently indicated that the grinding body is overheated and is no longer suitable for further use. As long as the grinding body is operated below the predetermined maximum temperature, the grinding body will then regain its original color in the cooled state again. Finally, also, only irreversible dyes can be used in order, for example, when a predetermined external surface temperature is reached, a sudden change in color occurs. In this way, it can be permanently indicated that the grinding body has already been used once. This ensures that only new grinding bodies with a perfect grinding layer are always used. Simply put, this will be ensured by setting the temperature of the sudden color change just above the ambient temperature.
    [0024] Conveniently, thermochromic color pigments are configured in such a way that their color changes at least once with an external surface temperature between 20 °C and 90 °C. According to the desired use of grinding, the thermochromic color pigments can, however, also be configured in such a way that their color changes, at least once, with an external surface temperature between 30 °C and 70 ° Ç. Generally speaking, in the choice of color pigments, it is foreseen that initially the intended use of grinding for a grinding body will have to be determined. Based on the thermosensitive patient area of interest to the patient or to the work piece, such colored thermochromic pigments will then have to be chosen whose color changes at least once in the temperature range or when the maximum grinding temperature is reached allowed. As the grinding body, in the grinding processes, is heated from the outside to the inside, also with the same use of grinding, pigments of thermochromic colors can be used, that is, thermochromic dyes, with different color differentiation temperatures. According to the points where thermochromic dyes are foreseen, at least a sudden color change temperature, with thermochromic dyes located more outwardly, should be correspondingly lower than in a range situated more inwardly.
    [0025] Preferably, thermochromic dyes are configured in such a way that their color changes at least once with an external surface temperature situated between 40 °C and 60 °C. This band is especially well suited for podiatry.
    [0026] Especially advantageously, thermochromic dyes have several defined color burst temperatures. Based on sudden fine changes of graduated colors, the user will be able to accurately determine the temperature of the external surface of the grinding body. By mixing these pigments of different thermochromic colors and/or thermochromic dyes, different, reversible and/or irreversible color paths can be obtained, with different sudden color change temperatures.
    [0027] In addition, thermochromic dyes can be configured in such a way that at least one sudden color change of the thermochromic dye has the continuous or salt-form sequence. Advantageously, thermochromic dyes are configured in such a way that at least one sudden change in color of the thermochromic dye takes place continuously. In this way, the observer will be able to perceive the increasing temperature increase of the grinding body, taking adequate countermeasures for the cooling of the grinding body, for example, the removal of the grinding body from the surface to be worked. Alternatively, at least a sudden color change of thermochromic dyes may also have a salt-form sequence. With a mixture of the most differentiated thermochromic dyes, sudden color changes with continuous or salt-form action can be foreseen. Furthermore, thermochromic dyes which change their color continuously at a first color-shift temperature and saltiformly at a second color-changing temperature can also be envisioned.
    [0028] Advantageously, thermochromic dyes are configured in such a way that they are transparent at least at one of the sudden color change temperatures. In this way, the underlying layers, reaching these sudden color change temperatures, become visible, so that, for example, a dyed inner cover layer or an application of paint on the supporting surface can be recognized from the outside. Preferably, these thermochromic dyes are configured in such a way within the covering layer that, at least, at an external surface temperature less than 20 °C, they are opaque and, at an external surface temperature, at least, defined, is greater than 20 °C. Conveniently, an inner bonding layer, arranged below the cover layer, or the backing layer, is dyed in an alert color. In this way, for example, thermochromic dye media, with increasing temperature, are capable of being transported through a given color path and with a defined external surface temperature greater than 20°C, they become transparent. In this way a dark colored layer, for example initially during heating of the outer face of the grinding body may become transparent and the dyed layer applied below the cover layer may become transparent. This can be tinted - for better perception - in an alert color, for example, in red, yellow or a flashy color. In addition, also, a color can be chosen that corresponds to the wear color with use as scheduled. In this way, the grinding body, both in complete coverage, with ground material, and also, with a higher temperature, would acquire the same paint. The user will then recognize that they will have to stop the jobs. As long as the grinding body is clogged with ground material, the color does not change anymore and the user will recognize that he cannot carelessly use the transparent grinding body and with at least a defined external surface temperature greater than 20° C is opaque. Thus, an initially transparent color under the cover layer, by means of this cover layer, can be covered, in order to show in this way the increase in temperature.
    [0029] In addition, thermochromic dyes can be configured in such a way that a sudden color change occurs at a first color sudden change temperature and another color sudden change occurs at another color sudden change temperature . Advantageously, the color change at the first color sudden change temperature is reversible and the color change at the second color change temperature is irreversible. Preferably, the second color flash temperature is greater than the first color change temperature. With this, the first sudden change of color may be reversible, for example, in a temperature range without danger for the material to be worked or for the patient, so that the grinding body with cooling starts to regain its original color. If, instead, the grinding body is heated beyond a defined temperature, for example, harmful to the material being worked on or to the patient, resulting in burns or rendering the grinding body useless, the second sudden color change temperature it may be irreversible. Likewise, the second sudden color change temperature may be just above room temperature, so the user immediately recognizes that the grinding body has already been used once. In this case, the first sudden color change temperature will be in the ambient temperature range so that the color of the grinding body is not irreversibly damaged before use.
    [0030] Preferably, it is provided that the grinding body is configured as a grinding head with rotational symmetry, which can be joined with a drive shaft for rotary drive. For example, the grinding body is produced as a grinding cap with a backing layer of a flexible material, eg cotton. Likewise, the grinding body can be configured as a grinding wheel.
    [0031] Another object of the present invention is a grinding tool as the grinding body described above. The grinding tool has means for interconnecting the grinding body with an actuating device for the rotary drive of the grinding body.
    [0032] In addition, another object of the present invention is the use of the grinding body described above, that is, the grinding tool described above, for the treatment of human bodily points. Preferably, the grinding body, ie the grinding tool, will be used for the treatment of the feet, ie in the context of podiatry.
    [0033] A preferred example of implementation will then be explained based on the figures. The figures show:
    [0034] Figure 1 - a longitudinal body of an embodiment of a grinding tool according to the invention; and
    [0035] Figure 2 - a longitudinal section of a partial view of a grinding body according to the invention.
    [0036] Figure 1 shows an embodiment of a de-grinding tool according to the invention, for the treatment of feet, with which, especially hardened foot parts can be ground.
    [0037] The grinding tool comprises a rotating symmetry grinding head 1 and features the cast resin core 2. The resin is configured in a semi-spherical shape and has, at one flat end 3, a central perforation 4. In this perforation 4, an elongated rod 5, preferably made of metal, is pressed. In addition, an actuating device, not shown, is provided for rotating the grinding head 1 around its longitudinal axis L. A grinding cap 6 is glued to the core, across its entire face, which extends beyond the core 2 in longitudinal direction at its flat end 3 .
    [0038] Figure 2 shows a longitudinal section of the demerging cap 6, according to the invention. It can be recognized that the grinding layer 6 is made up of several layers, having a backing layer 7 and a grinding layer 8. The backing layer 7 is produced from a flexible cotton fabric, being glued to the core 2 not shown in the figure 2. On an outer side 9 of the support layer 7, spaced from the core 2, the grinding layer 8 is applied.
    [0039] The grinding layer 8 is configured in several layers and has an inner and an outer bonding layer, that is, a forming layer 10 and a covering layer 11. The forming layer 10 is applied on the outer side 9 of the layer backing 7. This features a 12 ceramic binder that is dyed a non-thermochromic red color. Integrated in the ceramic binder 12 of the forming layer 10 are grinding grains 13. The grinding grains 13 are transparent single crystal corundums which are preferably dispersed electrostatically in the forming layer 10. These crystals have a grain size of approximately 425 micrometers. It can be recognized that the forming layer 10 and the partially protruding grinding grains 13 form an uneven and comminuted surface 14. On this comminuted surface 14 the covering layer 11 is applied, which coats the forming layer 10 and the grains. grinding 13 with a relatively thin layer and the grinding grains 13 are additionally bonded. The cover layer 11 has a transparent duroplastic binder 15 which can be thermally hardened. Correspondingly to the fragmented surface 14, the covering layer 11 also has an unequal external face 16. Between the different grinding grains 13, grinding spaces 17 are defined which serve to collect hardened skin residues separated during the grinding process.
    [0040] To determine the external surface temperature of the grinding layer 6, in the transparent binder 15 of the covering layer 11, thermochromic dyes are attached. Thermochromic dyes feature a blend of reversible color pigments that span two groups of equal distribution. The first group has blue thermochromic color pigments, which at a sudden color change temperature of 40°C become transparent, and the second group has yellow thermochromic color pigments, which become transparent in case of a sudden change color of 60°C. In this way, the cover layer 11 provided with the thermochromic colored pigments is dyed a shade of green at room temperature.
    [0041] During the operation, the podiatrist removes the grinding head 1 from a sterilized package and fixes it through the rod 5, in a jaw of the actuating device. During the grinding process, the podiatrist will press the grinding head 1, for example, against an area of the patient's hardened skin foot.
    [0042] By friction between the grinding layer 8 and the patient's foot, frictional heat arises which results in an increase in the temperature of the external surface of the grinding layer 6. The cover layer 11 is still green, in a cold state, at temperature turns yellow from an external surface temperature of grinding cap 6 of 40°C. In this way, the podiatrist recognizes that the temperature of the external surface of the grinding cap 6 is at a pleasant temperature for the patient, above 40°C, but below 60°C.
    [0043] When the podiatrist does not remove the grinding body1, the temperature of the outer surface of the grinding cap 6 will continue to increase, with the longer duration of grinding. If the temperature of the outer surface exceeds 60°C, the cover layer 11 becomes transparent and the red forming layer 10 can be recognized. In this way, it will be signaled to the podiatrist that the temperature of the external surface has reached an unpleasant temperature for the patient and the grinding process should be interrupted for the cooling of the grinding cap 6.
    [0044] As soon as the podiatrist lifts the grinding body of foot 1, the grinding cap 6 may cool down. Afterwards, the spaces for thinning 17 of the grinding layer 8 will also be released, into which the hard skin shavings, removed by the grinding layer 8, during the grinding process, were transported. The chips therefore fall out of the thinning compartments 14, ie they can be blown away there.
    [0045] In addition, the thermochromic colored pigments of the covering layer 11 adapt not only to indicate the temperature of the external surface of the grinding layer 8, but also to determine the wear of the grinding layer 8. It happens that, with the start of the first grinding process, the grinding layer 8 will be slowly ground. The podiatrist will recognize this wear by the fact that initially in the area of the transparent grinding grains 13 the covering layer 11 dyed by thermochromic ink pigments is being thinned out and the underlying red formation layer 10 becomes visible in spots. With increasing wear of the grinding layer 8, progressively larger faces of the red-dyed forming layer 10 become visible, because the covering layer 11, at least in the location around the grinding grains, continues to be ground and with the continued use will be fully consumed. In this way, it will be indicated to the podiatrist that the covering layer 11, which, alongside the forming layer 10, offers the grinding grains 13 additional retention, will be progressively consumed. To prevent a breakage of the grinding grains 13, the grinding cap 6 should no longer be used when the forming layer 10 is released to a greater extent.
    [0046] By mixing several thermochromic dyes, in the different coating layers 10, 11, nuances of different colors can be obtained. In addition, irreversible thermochromic dyes can also be provided to permanently indicate to the podiatrist, in the transposition of a defined external surface temperature of the grinding cap 6, that this was used and, for hygienic reasons, should not be used again. REFERENCE1 Grinding head2 Grain3 Finish4 Drilling5 Shank6 Grinding cover7 Backing layer8 Grinding layer9 Outer side10 Forming layer11 Covering layer12 Formation layer binder13 Grinding grains14 Surface15 Longitudinal binder 16 Covering layer
    权利要求:
    Claims (15)
    [0001]
    1. Grinding tool (1) with a grinding body (6) and means (5) for joining the grinding tool (1) with a drive device for the rotary drive of the grinding body (6), wherein the grinding body (6) has a grinding layer (8), constituted in the form of several layers, having at least one internal binder (10) and an external binder (11), as well as having grinding grains (13), whereby the inner binder layer (10) is configured as a forming layer with at least one binder (12) and the outer binder layer (11) is configured as a cover layer with another binder ( 15), characterized by the fact that thermochromic dyes are provided in the external agglutinating layer (11).
    [0002]
    2. Grinding tool (1) according to claim 1, characterized in that the grinding body (6) is made up of several layers and has a supporting layer (7).
    [0003]
    3. Grinding tool (1) according to any one of the preceding claims, characterized in that the internal binder layer (10) is free of thermochromic dyes.
    [0004]
    4. Grinding tool (1) according to any one of the preceding claims, characterized in that the binder (15) of the covering layer (11) is a transparent binder.
    [0005]
    5. Grinding tool (1) according to claim 4, characterized in that the binder (15) of the covering layer (11) is a transparent duroplastic.
    [0006]
    6. Grinding tool (1) according to any one of the preceding claims, characterized in that non-thermochromic dyes are provided in the forming layer (10).
    [0007]
    7. Grinding tool (1) according to any one of claims 2 to 6, characterized in that on a surface (9) of the supporting layer (7), facing the direction of the grinding layer (8) is a non-thermochromic paint is applied.
    [0008]
    8. Grinding tool (1) according to any one of the preceding claims, characterized in that at least a partial amount of the grinding grains (13) is transparent.
    [0009]
    9. Grinding tool (1) according to any one of the preceding claims, characterized in that at least a partial amount of the grinding grains (13) is configured in color.
    [0010]
    10. Grinding tool (1) according to any one of the preceding claims, characterized in that the grinding grains (13) have a grain size between 30 and 1400 micrometers.
    [0011]
    11. Grinding tool (1) according to any one of the preceding claims, characterized by the fact that thermochromic dyes present at least such a sudden color change temperature that their color presents a rapid change , at least once, between 40 °C and 60 °C.
    [0012]
    12. Grinding tool (1) according to any one of the preceding claims, characterized by the fact that thermochromic dyes have different defined sudden color change temperatures.
    [0013]
    13. Grinding tool (1) according to any one of the preceding claims, characterized in that the thermochromic dyes are configured in such a way that a sudden color change takes place at a first color sudden change temperature and another sudden color change takes place at a second sudden color change temperature, where the sudden color change at the first sudden color change temperature is reversible, and the sudden color change at the second sudden color change temperature is irreversible , where the second color flash temperature is higher than the first color change temperature.
    [0014]
    14. Use of a grinding tool (1) characterized in that the grinding tool (1) is a grinding tool (1) as defined in any of the preceding claims for the treatment of points on the human body.
    [0015]
    15. Use of the grinding tool (1) according to claim 14, characterized in that the grinding tool (1) is used for the treatment of the feet.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112015025610B1|2021-08-03|GRINDING TOOL AND USE OF IT
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    同族专利:
    公开号 | 公开日
    UA115689C2|2017-12-11|
    WO2014167111A1|2014-10-16|
    PT2983866T|2017-03-03|
    US10682159B2|2020-06-16|
    EA201500907A1|2016-05-31|
    HRP20170191T1|2017-04-21|
    MX361830B|2018-12-18|
    DK2983866T3|2017-03-06|
    LT2983866T|2017-06-12|
    EA029424B1|2018-03-30|
    HUE031606T2|2017-07-28|
    CN105283270B|2017-07-11|
    CA2909319C|2017-09-19|
    BR112015025610A2|2017-07-18|
    KR20160003701A|2016-01-11|
    US20160051283A1|2016-02-25|
    AU2014253025B2|2016-08-11|
    CN105283270A|2016-01-27|
    PL2983866T3|2017-07-31|
    EP2983866B1|2017-01-25|
    AU2014253025A1|2015-11-12|
    MY174214A|2020-03-16|
    CA2909319A1|2014-10-16|
    KR101824786B1|2018-02-01|
    ES2617030T3|2017-06-15|
    SI2983866T1|2017-06-30|
    US9924967B2|2018-03-27|
    MX2015014245A|2016-06-02|
    DE102013103643A1|2014-10-16|
    RS55688B1|2017-07-31|
    DE102013103643B4|2019-11-07|
    EP2983866A1|2016-02-17|
    US20180177529A1|2018-06-28|
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    法律状态:
    2018-02-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-03| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 11/04/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013103643.0A|DE102013103643B4|2013-04-11|2013-04-11|Grinding tool and use of a grinding tool|
    DE102013103643.0|2013-04-11|
    PCT/EP2014/057418|WO2014167111A1|2013-04-11|2014-04-11|Grinding body|
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