EP0476272A1 - Rotary polishing tool - Google Patents
Rotary polishing tool Download PDFInfo
- Publication number
- EP0476272A1 EP0476272A1 EP91112586A EP91112586A EP0476272A1 EP 0476272 A1 EP0476272 A1 EP 0476272A1 EP 91112586 A EP91112586 A EP 91112586A EP 91112586 A EP91112586 A EP 91112586A EP 0476272 A1 EP0476272 A1 EP 0476272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- polishing portion
- rotary
- polishing
- rubber layer
- 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
Images
Classifications
-
- 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
- B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material
-
- 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
Definitions
- the present invention relates to a rotary polishing tool which is driven by an electric motor for polishing a workpiece.
- Such rotary polishing tools conventionally used include one comprising a disk-shaped polishing portion corresponding to a workpiece and a disk-shaped substrate made of resin for supporting the polishing portion with the polishing portion being bonded thereto.
- the polishing work using such a rotary polishing tool is performed by mounting this tool on a driving shaft of an electric motor and rotating the same to press the above polishing portion against the workpiece.
- the tool is rotated at high peripheral speed of, for example, a maximum of approximately 80 m/s. Consequently, a substantially large centrifugal force is developed in this tool. In addition, a large reaction force is applied to this tool from the workpiece. Accordingly, it is particularly desired that the above substrate has sufficient strength.
- the above substrate is made of metal to improve the strength thereof. If this substrate is merely a metal plate, however, such problems arise that the tool becomes heavy and the centrifugal force becomes the larger.
- a first object of the present invention is for a tool to have sufficient strength to oppose a centrifugal force and a reaction force which is applied from a workpiece.
- a second object of the present invention is to prevent a tool from being heavy even if the tool has the above described strength.
- a third object of the present invention is for a polishing portion constituting a tool to be supported by a substrate while holding sufficient strength.
- a rotary polishing tool comprises a disk-shaped polishing portion corresponding to a workpiece and a disk-shaped substrate which is positioned on the rotary center of the polishing portion for supporting the polishing portion.
- the substrate is provided with a mounting hole through which a driving shaft is passed on this rotary center.
- the above substrate is made of metal and is provided with a lot of holes, and there is provided a rubber layer which is interposed between the polishing portion and the substrate and vulcanized and bonded to the polishing portion and the substrate to fix the polishing portion and the substrate to each other.
- Figs. 1 and 2 show a first embodiment.
- reference numeral 1 denotes a rotary polishing tool.
- This rotary polishing tool 1 has a disk-shaped polishing portion 3 corresponding to a workpiece 2 and a substrate for supporting the polishing portion 3.
- This substrate 4 is positioned on a rotary center 3a of the above polishing portion 3, and has a disk shape and an approximately circular truncated conical shape.
- the above polishing portion 3 is made of a rubber material having abrasive grains included therein.
- the above substrate 4 is a metal plate made of iron and is provided with a lot of circular holes 5. Although the holes 5 are formed almost uniformly throughout the substrate 4, they are illustrated only in a part of the substrate 4 in Fig. 1.
- a rubber layer 6 is interposed between the polishing portion 3 and the substrate 4. This rubber layer 6 is vulcanized and bonded to the polishing portion 3 and the substrate 4, to fix the polishing portion 3 and the substrate 4 to each other.
- reference numeral 6a denotes a boundary surface of the above rubber layer 6 and the above polishing portion 3. Since the above polishing portion 3 is also made of a rubber material as described above, however, the polishing portion 3 and the rubber layer 6 are simultaneously vulcanized and bonded to the substrate 4, to be integrated with each other. Therefore, the above boundary surface 6a does not, in fact, clearly exist.
- a glass fiber 7 is embedded in the above rubber layer 6 so that they are integrated with each other, thereby to strengthen the rubber layer 6.
- the above substrate 4 is provided with a circular mounting hole 8 on the above rotary center 3a.
- the polishing portion 3 is also provided with another mounting hole 8a connected to the above mounting hole 8.
- the above described holes 5 are formed in a portion other than the outer periphery of the substrate 4 and the periphery of the mounting hole 8. More specifically, both the outer and inner peripheries of the substrate 4 have a continuously circular shape, so that the decrease in strength of the substrate 4 due to the formation of the holes 5 is effectively restrained.
- a driving shaft 10 of a handy electric motor 9 is first passed through the above mounting hole 8 and the other mounting hole 8a and a flanged nut 11 is screwed into the driving shaft 10, thereby to mount the rotary polishing tool 1 on the above driving shaft 10.
- the rotary polishing tool 1 is then rotated by driving of the electric motor 9. If the polishing portion 3 is pressed against the above workpiece 2, this workpiece 2 is polished.
- the above rubber layer 6 may be made of exactly the same material as that of the polishing portion 3, that is, the polishing portion 3 and the rubber layer 6 may be integrally formed using a rubber material having abrasive grains included therein. In this case, the above boundary surface 6a does not exist.
- the substrate 4 for supporting the polishing portion 3 is made of metal and is further formed in an approximately circular truncated conical shape. Accordingly, the strength of the rotary polishing tool 1 can be considerably improved, as compared with the conventional case where the substrate 4 is made of resin. Consequently, this rotary polishing tool 1 has sufficient strength to oppose a centrifugal force and a reaction force which is applied from the workpiece 2.
- the rotary polishing tool 1 can be lightweight while sufficiently holding the strength.
- the rubber layer 6 which is interposed between the polishing portion 3 and the substrate 4 and vulcanized and bonded to the polishing portion 3 and the substrate 4 to fix the polishing portion 3 and the substrate 4 to each other. Accordingly, when the polishing portion 3 is brought into contact with the workpiece 2 so that an impact force is applied to the polishing portion 3 from the workpiece 2, this impact force is absorbed by the above rubber layer 6. Consequently, a part of the polishing portion 3 can be prevented from being stripped off from the substrate 4 by the above impact force. That is, the polishing portion 3 is supported by the substrate 4 while holding sufficient strength.
- the above polishing portion 3 is firmly bonded to the lower surface of the substrate 4 through the rubber layer 6 strengthened by the glass fiber 7.
- the rubber layer 6 enters the above holes 5 at the time of vulcanization, thereby to sufficiently strength the above bonding. Consequently, also in this point, the polishing portion 3 is supported by the substrate 4 while holding sufficient strength.
- the glass fiber 7 is provided and the nut 11 is flanged.
- Fig. 3 shows a second embodiment.
- a substrate 4 is embedded in a rubber layer 6 so that they are integrated with each other. By doing so, the adhesive strength of a polishing portion 3 to the substrate 4 is further improved.
- Fig. 4 shows a third embodiment.
- a reinforcing pipe 13 made of metal is fitted in the inner peripheral surface of another mounting hole 8a.
- This pipe 13 is formed by squeezing a substrate 4 using a press.
- This pipe 13 may be welded to the substrate 4.
- a nut 14 is welded to the lower end of the above pipe 13.
- the nut 14 is screwed into a driving shaft 10 of an electric motor 9 to screw the pipe 13 on the driving shaft 10, thereby to mount a rotary polishing tool 1 on the electric motor 9.
- the above pipe 13 prevents a polishing portion 3 and a rubber layer 6 from being deformed.
- the tool 1 is firmly mounted on the electric motor 9 by screwing the above pipe 13 on the driving shaft 10, to reliably prevent the vibration caused when a centrifugal force is developed.
- polishing portion 3 and the rubber layer 6 are sandwiched between the substrate 4 and the nut 14 in the periphery of the other mounting hole 8a. Consequently, the polishing portion 3 is supported by the substrate 4 more reliably. Meanwhile, the nut 14 and the pipe 13 may be separately formed.
- Fig. 5 shows a fourth embodiment.
- annulus ring portions 15 are respectively formed in opening edges of holes 5 and a mounting hole 8 by press working of the opening edges.
- the annulus ring portions 15 are respectively projected into a rubber layer 6 from a substrate 4. Consequently, the strength of the substrate 4 is improved, and bonding of the rubber layer 6 to the substrate 4 is further strengthened. Meanwhile, the amount of projection of each of the above annulus ring portions 15 is approximately 0.5 to 1 mm.
- Fig. 6 shows a fifth embodiment
- a nut 17 is fitted in the inner peripheral surface of each of a mounting hole 8 and another mounting hole 8a and is welded to a substrate 4, to reinforce a rotary polishing tool 1.
- a polishing portion 3 is constituted by a lot of pieces of abrasive paper or abrasive felt which are radially disposed around a rotary center 3a. A part of the polishing portion 3 is embedded in a rubber layer 6 so that the polishing portion 3 is bonded to the rubber layer 6.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
- The present invention relates to a rotary polishing tool which is driven by an electric motor for polishing a workpiece.
- Such rotary polishing tools conventionally used include one comprising a disk-shaped polishing portion corresponding to a workpiece and a disk-shaped substrate made of resin for supporting the polishing portion with the polishing portion being bonded thereto. The polishing work using such a rotary polishing tool is performed by mounting this tool on a driving shaft of an electric motor and rotating the same to press the above polishing portion against the workpiece.
- Meanwhile, during the above described work, the tool is rotated at high peripheral speed of, for example, a maximum of approximately 80 m/s. Consequently, a substantially large centrifugal force is developed in this tool. In addition, a large reaction force is applied to this tool from the workpiece. Accordingly, it is particularly desired that the above substrate has sufficient strength.
- Therefore, it is considered that the above substrate is made of metal to improve the strength thereof. If this substrate is merely a metal plate, however, such problems arise that the tool becomes heavy and the centrifugal force becomes the larger.
- Furthermore, if the above metal plate is merely flat, there is a possibility that a part of the polishing portion is stripped off from the substrate by an impact force applied to the polishing portion from the workpiece during the work, resulting in insufficient strength to support the polishing portion by the substrate.
- A first object of the present invention is for a tool to have sufficient strength to oppose a centrifugal force and a reaction force which is applied from a workpiece.
- A second object of the present invention is to prevent a tool from being heavy even if the tool has the above described strength.
- A third object of the present invention is for a polishing portion constituting a tool to be supported by a substrate while holding sufficient strength.
- According to the present invention, a rotary polishing tool comprises a disk-shaped polishing portion corresponding to a workpiece and a disk-shaped substrate which is positioned on the rotary center of the polishing portion for supporting the polishing portion. The substrate is provided with a mounting hole through which a driving shaft is passed on this rotary center. The above substrate is made of metal and is provided with a lot of holes, and there is provided a rubber layer which is interposed between the polishing portion and the substrate and vulcanized and bonded to the polishing portion and the substrate to fix the polishing portion and the substrate to each other.
- The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
-
- Figs. 1 and 2 are diagrams showing a first embodiment, where Fig. 1 is a plan view and Fig. 2 is a sectional side elevation view;
- Fig. 3 is a sectional side elevation view showing a second embodiment;
- Fig. 4 is a sectional side elevation view showing a third embodiment;
- Fig. 5 is a sectional side elevation view showing a fourth embodiment; and
- Fig. 6 is a sectional side elevation view showing a fifth embodiment.
- Figs. 1 and 2 show a first embodiment.
- In Figs. 1 and 2,
reference numeral 1 denotes a rotary polishing tool. Thisrotary polishing tool 1 has a disk-shaped polishing portion 3 corresponding to aworkpiece 2 and a substrate for supporting thepolishing portion 3. Thissubstrate 4 is positioned on arotary center 3a of theabove polishing portion 3, and has a disk shape and an approximately circular truncated conical shape. - The above polishing
portion 3 is made of a rubber material having abrasive grains included therein. On the other hand, theabove substrate 4 is a metal plate made of iron and is provided with a lot ofcircular holes 5. Although theholes 5 are formed almost uniformly throughout thesubstrate 4, they are illustrated only in a part of thesubstrate 4 in Fig. 1. - A
rubber layer 6 is interposed between thepolishing portion 3 and thesubstrate 4. Thisrubber layer 6 is vulcanized and bonded to thepolishing portion 3 and thesubstrate 4, to fix thepolishing portion 3 and thesubstrate 4 to each other. - In Figs. 1 and 2,
reference numeral 6a denotes a boundary surface of theabove rubber layer 6 and theabove polishing portion 3. Since theabove polishing portion 3 is also made of a rubber material as described above, however, thepolishing portion 3 and therubber layer 6 are simultaneously vulcanized and bonded to thesubstrate 4, to be integrated with each other. Therefore, theabove boundary surface 6a does not, in fact, clearly exist. - A
glass fiber 7 is embedded in theabove rubber layer 6 so that they are integrated with each other, thereby to strengthen therubber layer 6. - The
above substrate 4 is provided with acircular mounting hole 8 on the aboverotary center 3a. In addition, thepolishing portion 3 is also provided with anothermounting hole 8a connected to theabove mounting hole 8. The above describedholes 5 are formed in a portion other than the outer periphery of thesubstrate 4 and the periphery of themounting hole 8. More specifically, both the outer and inner peripheries of thesubstrate 4 have a continuously circular shape, so that the decrease in strength of thesubstrate 4 due to the formation of theholes 5 is effectively restrained. - At the time of the polishing work, a
driving shaft 10 of a handy electric motor 9 is first passed through theabove mounting hole 8 and theother mounting hole 8a and a flangednut 11 is screwed into thedriving shaft 10, thereby to mount therotary polishing tool 1 on the above drivingshaft 10. Therotary polishing tool 1 is then rotated by driving of the electric motor 9. If thepolishing portion 3 is pressed against theabove workpiece 2, thisworkpiece 2 is polished. - Meanwhile, for convenience of forming, the
above rubber layer 6 may be made of exactly the same material as that of thepolishing portion 3, that is, thepolishing portion 3 and therubber layer 6 may be integrally formed using a rubber material having abrasive grains included therein. In this case, theabove boundary surface 6a does not exist. - In the above described construction, the
substrate 4 for supporting thepolishing portion 3 is made of metal and is further formed in an approximately circular truncated conical shape. Accordingly, the strength of therotary polishing tool 1 can be considerably improved, as compared with the conventional case where thesubstrate 4 is made of resin. Consequently, thisrotary polishing tool 1 has sufficient strength to oppose a centrifugal force and a reaction force which is applied from theworkpiece 2. - Furthermore, since the
holes 5 are formed in theabove substrate 4, thesubstrate 4 can be prevented from being heavy uselessly. Accordingly, therotary polishing tool 1 can be lightweight while sufficiently holding the strength. - Additionally, there is provided the
rubber layer 6 which is interposed between thepolishing portion 3 and thesubstrate 4 and vulcanized and bonded to thepolishing portion 3 and thesubstrate 4 to fix thepolishing portion 3 and thesubstrate 4 to each other. Accordingly, when thepolishing portion 3 is brought into contact with theworkpiece 2 so that an impact force is applied to thepolishing portion 3 from theworkpiece 2, this impact force is absorbed by theabove rubber layer 6. Consequently, a part of thepolishing portion 3 can be prevented from being stripped off from thesubstrate 4 by the above impact force. That is, thepolishing portion 3 is supported by thesubstrate 4 while holding sufficient strength. - Moreover, the above polishing
portion 3 is firmly bonded to the lower surface of thesubstrate 4 through therubber layer 6 strengthened by theglass fiber 7. In addition, therubber layer 6 enters theabove holes 5 at the time of vulcanization, thereby to sufficiently strength the above bonding. Consequently, also in this point, thepolishing portion 3 is supported by thesubstrate 4 while holding sufficient strength. - Meanwhile, it is not necessary that the
glass fiber 7 is provided and thenut 11 is flanged. - The following drawings show the other embodiments. Common reference numerals are assigned to constituent elements which are common to the embodiments and the above described first embodiment. The description of the common constituent elements and the functions concerning the constituent elements are omitted and hence, only different constituent elements and functions will be described.
- Fig. 3 shows a second embodiment.
- According to the second embodiment, a
substrate 4 is embedded in arubber layer 6 so that they are integrated with each other. By doing so, the adhesive strength of a polishingportion 3 to thesubstrate 4 is further improved. - Fig. 4 shows a third embodiment.
- According to the third embodiment, a reinforcing
pipe 13 made of metal is fitted in the inner peripheral surface of another mountinghole 8a. Thispipe 13 is formed by squeezing asubstrate 4 using a press. Thispipe 13 may be welded to thesubstrate 4. In addition, anut 14 is welded to the lower end of theabove pipe 13. - The
nut 14 is screwed into a drivingshaft 10 of an electric motor 9 to screw thepipe 13 on the drivingshaft 10, thereby to mount arotary polishing tool 1 on the electric motor 9. In this case, theabove pipe 13 prevents a polishingportion 3 and arubber layer 6 from being deformed. In addition, thetool 1 is firmly mounted on the electric motor 9 by screwing theabove pipe 13 on the drivingshaft 10, to reliably prevent the vibration caused when a centrifugal force is developed. - Furthermore, the polishing
portion 3 and therubber layer 6 are sandwiched between thesubstrate 4 and thenut 14 in the periphery of the other mountinghole 8a. Consequently, the polishingportion 3 is supported by thesubstrate 4 more reliably. Meanwhile, thenut 14 and thepipe 13 may be separately formed. - Fig. 5 shows a fourth embodiment.
- According to the fourth embodiment,
annulus ring portions 15 are respectively formed in opening edges ofholes 5 and a mountinghole 8 by press working of the opening edges. Theannulus ring portions 15 are respectively projected into arubber layer 6 from asubstrate 4. Consequently, the strength of thesubstrate 4 is improved, and bonding of therubber layer 6 to thesubstrate 4 is further strengthened. Meanwhile, the amount of projection of each of the aboveannulus ring portions 15 is approximately 0.5 to 1 mm. - Fig. 6 shows a fifth embodiment,
According to the fifth embodiment, anut 17 is fitted in the inner peripheral surface of each of a mountinghole 8 and another mountinghole 8a and is welded to asubstrate 4, to reinforce arotary polishing tool 1. - Furthermore, a polishing
portion 3 is constituted by a lot of pieces of abrasive paper or abrasive felt which are radially disposed around arotary center 3a. A part of the polishingportion 3 is embedded in arubber layer 6 so that the polishingportion 3 is bonded to therubber layer 6. - Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present invention being limited only by the terms of the appended claims.
Claims (10)
- A rotary polishing tool (1) comprising a disk-shaped polishing portion (3) corresponding to a workpiece (2) and a disk-shaped substrate (4) which is positioned on the rotary center (3a) of the polishing portion (3) for supporting the polishing portion (3), the substrate (4) being provided with a mounting hole (8) through which a driving shaft (10) is passed on the rotary center (3a),
the rotary polishing tool (19 being characterized in that said substrate (4) is made of metal and is provided with a lot of holes (5), and there is provided a rubber layer (6) which is interposed between said polishing portion (3) and said substrate (4) and vulcanized and bonded to the polishing portion (3) and the substrate (4) to fix the polishing portion (3) and the substrate (4) to each other. - A rotary polishing tool (1) according to claim 1, wherein the polishing portion (3) is made of a rubber material having abrasive grains included therein so that the polishing portion (3) and the rubber layer (6) are made of the same material.
- A rotary polishing tool (1) according to claim 1, wherein said substrate (4) is formed in an approximately circular truncated conical shape.
- A rotary polishing tool (1) according to any one of claims 1, 2 or 3, wherein the holes (5) are formed in a circular shape.
- A rotary polishing tool (1) according to claim 1, wherein a glass fiber (7) is embedded in said rubber layer (6) to strengthen the rubber layer (6).
- A rotary polishing tool (1) according to claim 1, wherein the substrate (4) is embedded in the rubber layer (6).
- A rotary polishing tool (1) according to claim 1, wherein the polishing portion (3) is provided with another mounting hole (8a) so as to be connected to the mounting hole (8), and a reinforcing pipe (13) is fitted in the inner peripheral surface of said another mounting hole (8a) (Fig. 4).
- A rotary polishing tool (1) according to claim 1, wherein each of opening edges of the mounting hole (8) and the holes (5) is projected into the rubber layer (6).
- A rotary polishing tool (1) according to claim 2, wherein the polishing portion (3) is made of an abrasive paper.
- A rotary polishing tool (1) according to claim 1, wherein the polishing portion (3) is made of abrasive felt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1990092854U JPH0711887Y2 (en) | 1990-09-03 | 1990-09-03 | Rotary polishing tool |
JP92854/90U | 1990-09-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0476272A1 true EP0476272A1 (en) | 1992-03-25 |
EP0476272B1 EP0476272B1 (en) | 1994-11-30 |
Family
ID=14066016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91112586A Expired - Lifetime EP0476272B1 (en) | 1990-09-03 | 1991-07-26 | Rotary polishing tool |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0476272B1 (en) |
JP (1) | JPH0711887Y2 (en) |
AT (1) | ATE114529T1 (en) |
CA (1) | CA2047255C (en) |
DE (1) | DE69105422T2 (en) |
ES (1) | ES2064826T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995008418A1 (en) * | 1993-09-24 | 1995-03-30 | Quintilio Lupi | An elastic base grinding wheel for smoothing and polishing toroidal contours of hard materials |
US6136143A (en) * | 1998-02-23 | 2000-10-24 | 3M Innovative Properties Company | Surface treating article including a hub |
GB2407053A (en) * | 2003-10-18 | 2005-04-20 | Bosch Gmbh Robert | Plate insert for a grinding plate of a hand-held grinding tool |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2605973Y2 (en) * | 1992-09-01 | 2000-09-04 | 株式会社昭研 | Polishing and grinding tools |
USD409340S (en) | 1998-02-23 | 1999-05-04 | Minnesota Mining And Manufacturing Company | Hub |
USD408601S (en) | 1998-02-23 | 1999-04-20 | Minnesota Mining And Manufacturing Company | Surface treating article |
CN102107397B (en) * | 2009-12-25 | 2015-02-04 | 3M新设资产公司 | Grinding wheel and method for manufacturing grinding wheel |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2581567A (en) * | 1948-12-29 | 1952-01-08 | Darrell R Wiley | Buffer backing pad |
US2997820A (en) * | 1959-12-14 | 1961-08-29 | American Emery Wheel Works | Organic bond abrasive wheel |
US3143770A (en) * | 1960-07-21 | 1964-08-11 | Formax Mfg Corp | Molding apparatus for sanding pad assembly |
US3256646A (en) * | 1963-08-06 | 1966-06-21 | Mockli Rene | Grinding disc |
US4150955A (en) * | 1974-05-01 | 1979-04-24 | The Manufacturers Brush Company | Deformable non-cellular polyurethane polishing wheel |
DE3416186A1 (en) * | 1983-05-17 | 1985-01-24 | Hans J. 4400 Münster Fabritius | Grinding wheel |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4725748U (en) * | 1971-04-14 | 1972-11-22 |
-
1990
- 1990-09-03 JP JP1990092854U patent/JPH0711887Y2/en not_active Expired - Lifetime
-
1991
- 1991-07-17 CA CA002047255A patent/CA2047255C/en not_active Expired - Fee Related
- 1991-07-26 DE DE69105422T patent/DE69105422T2/en not_active Expired - Fee Related
- 1991-07-26 AT AT91112586T patent/ATE114529T1/en not_active IP Right Cessation
- 1991-07-26 EP EP91112586A patent/EP0476272B1/en not_active Expired - Lifetime
- 1991-07-26 ES ES91112586T patent/ES2064826T3/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2581567A (en) * | 1948-12-29 | 1952-01-08 | Darrell R Wiley | Buffer backing pad |
US2997820A (en) * | 1959-12-14 | 1961-08-29 | American Emery Wheel Works | Organic bond abrasive wheel |
US3143770A (en) * | 1960-07-21 | 1964-08-11 | Formax Mfg Corp | Molding apparatus for sanding pad assembly |
US3256646A (en) * | 1963-08-06 | 1966-06-21 | Mockli Rene | Grinding disc |
US4150955A (en) * | 1974-05-01 | 1979-04-24 | The Manufacturers Brush Company | Deformable non-cellular polyurethane polishing wheel |
DE3416186A1 (en) * | 1983-05-17 | 1985-01-24 | Hans J. 4400 Münster Fabritius | Grinding wheel |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995008418A1 (en) * | 1993-09-24 | 1995-03-30 | Quintilio Lupi | An elastic base grinding wheel for smoothing and polishing toroidal contours of hard materials |
US5655958A (en) * | 1993-09-24 | 1997-08-12 | Lupi; Quintilio | Elastic base grinding wheel for smoothing and polishing toroidal contours of hard materials |
US6136143A (en) * | 1998-02-23 | 2000-10-24 | 3M Innovative Properties Company | Surface treating article including a hub |
GB2407053A (en) * | 2003-10-18 | 2005-04-20 | Bosch Gmbh Robert | Plate insert for a grinding plate of a hand-held grinding tool |
GB2407053B (en) * | 2003-10-18 | 2005-10-12 | Bosch Gmbh Robert | Plate insert for a grinding plate of a hand-operated electric grinding tool |
Also Published As
Publication number | Publication date |
---|---|
JPH0451364U (en) | 1992-04-30 |
ATE114529T1 (en) | 1994-12-15 |
DE69105422D1 (en) | 1995-01-12 |
CA2047255C (en) | 1994-08-30 |
DE69105422T2 (en) | 1995-04-06 |
CA2047255A1 (en) | 1992-03-04 |
EP0476272B1 (en) | 1994-11-30 |
JPH0711887Y2 (en) | 1995-03-22 |
ES2064826T3 (en) | 1995-02-01 |
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