WO2002060644A1 - Mounting device for coated abrasive finishing articles - Google Patents
Mounting device for coated abrasive finishing articles Download PDFInfo
- Publication number
- WO2002060644A1 WO2002060644A1 PCT/US2001/050905 US0150905W WO02060644A1 WO 2002060644 A1 WO2002060644 A1 WO 2002060644A1 US 0150905 W US0150905 W US 0150905W WO 02060644 A1 WO02060644 A1 WO 02060644A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mounting apparatus
- aperture
- flange
- nut
- disc
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/08—Circular back-plates for carrying flexible material
- B24D9/085—Devices for mounting sheets on a backing plate
Definitions
- This invention relates generally to abrasive finishing articles and more particularly, to a mounting device for attaching coated abrasive finishing articles to the drive member of a power tool.
- the earliest and very common of such structures includes a support pad having a reinforced central aperture arranged to be engaged over the threaded end of the rotary shaft of the power tool.
- the abrasive finishing disc is placed on the flat surface of the pad and a flanged nut is turned down onto the threaded end of the rotary shaft protruding through the disc. When the nut is tightened, the flange lays flush against the abrasive surface of the disc and clamps the disc to the support pad.
- This traditional mode of attaching the abrasive finishing disc to the rotary power tool has two major disadvantages.
- the first of these is that in engagement of the rotating finishing disc against the work piece, a large amount of torque is imparted to the hub which tends to tighten the nut onto the threaded shaft of the power tool making it quite difficult to remove the nut in order to replace the disc after it is spent and usually involves the use of tools.
- such abrasive discs have to be replaced quite often.
- the second disadvantage is that the flange of the nut extends onto the ab ve surface of the finishing disc and the worker must be quite careful to prevent the flange on the nut from engaging the work piece which in most cases would impart damage to the work piece.
- a quick release abrasive finishing disc hub was developed and is most clearly shown in U.S. Patent Nos. 3,667,169 and 3,667,170.
- an adapter is provided which engages the power tool shaft and the adapter is placed on a standard support pad.
- the adapter is typically adhered to the back surface of the abrasive finishing disc and includes a raised boss having a central aperture whose rim is turned inward and shaped to form a screw thread which receives the threaded end of a stud on or the end of the power tool shaft itself.
- This allows the user to attach or remove the abrasive disc to the power tool rather quickly.
- the attaching structure is disposable along with the spent disc and therefore, increases the cost of the materials used in the abrasive finishing process.
- a mounting device for coated abrasive finishing articles and particularly a coated abrasive finishing disc which is reusable and will provide the ability to the user to quickly and easily remove and mount abrasive finishing discs upon a portable power tool without the need for wrenches, screwdrivers, or other tools and without the attachment of any external adapters or other attachment devices directly to the abrasive finishing discs.
- a typical attachment of the type above referred to for securing a coated abrasive disc having a central aperture to the power tool with a nut having flange is shown by the patent to G. L. Bryson, U.S. Patent No. 2,699,020.
- An additional type of quick change structure in addition to the patents above referred to which includes an adapter secured to the abrasive discs is shown by the patent to Field, U.S. Patent No. 3,653,858.
- a mounting apparatus for rotatably securing a coated abrasive finishing article to the drive member of a power tool which includes a support member and a nut adapted to extend through an aperture in the finishing article for engaging the finishing article with the power tool which comprises an outer irregular surface on the body of the nut which is adapted to engage an edge of the aperture through the finishing article in an interferenre fit and a centrally disposed threaded bore for engagement with the power tool drive member, a support pad is provided defining a centrally located aperture and a face to engage the abrasive finishing article with the support pad having a reduced thickness region adjacent and surrounding the aperture therethrough.
- the support member further includes a hollow externally threaded cylinder having an outwardly extending flange at one end thereof and a compression ring.
- the support pad is secured between the flange and the compression ring to secure the support pad upon the cylinder.
- the end of the cylinder having the flange defines a recess adapter to receive a flange extending outwardly from one end of the nut so that when assembled in operational configuration, the flange on the nut is below the abrasive finishing article surface so that it cannot engage a work piece during use.
- Figure 1 is a cross-sectional view of an abrasive finishing disc assembled with the mounting device of the present invention
- Figure 2 is a partially exploded view of the structure as illustrated in Figure 1;
- Figure 3 is a partially exploded view of an alternative embodiment of a mounting structure in accordance with the present invention.
- Figure 4 illustrates an abrasive finishing disc with the nut of the present invention secured thereto
- FIG. 5 A, B and C illustrates three embodiments of an attachment nut constructed in accordance with the principles of the present invention
- Figure 6 illustrates in cross-section schematically one embodiment of a support pad constructed in accordance with the principles of the present invention
- Figure 7 illustrates an alternative embodiment of such a support pad
- Figure 8 illustrates yet another alternative embodiment of a support pad constructed in accordance with the present invention. Detailed Description
- FIG. 1 there is illustrated schematically in cross-section, a mounting device for coated abrasive discs constructed in accordance with the principles of the present invention with a coated abrasive member secured thereon.
- the support member constructed in accordance with the present invention is adapted to secure an abrasive finishing article 10 in the form of a coated abrasive disc having a first surface 12 with abrasive finishing material thereon and a second uncoated surface 14 on the opposite side thereof.
- the disc 10 defines an aperture 16 centrally disposed therethrough.
- a nut 18 having a flange 20 extending outwardly from one end thereof is pushed through the aperture in such a manner that an outer surface 22 having an irregular configuration forms a substantially interference fit with the edge 24 of the aperture.
- the irregular surface may be formed by a plurality of alternating ridges and grooves which may take any shape desired and preferably would be disposed parallel with the axis 26 of the nut.
- the nut also defines a bore 26 therein which is internally threaded to receive the threaded end 28 of a drive member 30 which is adapted to be affixed to a power tool (not shown) but well known to those skilled in the art.
- a support pad 32 is provided and has a surface 34 which engages the surface 14 of the abrasive disc 10.
- the support pad also defines an aperture 35 centrally disposed therethrough.
- the surface 34 of the support pad 32 immediately adjacent to the opening 35 therethrough has a reduced thickness which is adapted to receive a second flange 36 on a cylinder 42.
- the support pad 32 in accordance with a preferred embodiment of the present invention useful with smaller discs includes a semi-rigid member 38 which may be formed of plastic having an elastomeric material 40 secured thereto with the elastomeric material 40 engaging the surface 36 of the abrasive disc 10 or alternatively, may be formed solely of elastomeric material.
- the support member further includes the hollow cylindrical member 42 having an externally threaded surface 44.
- a compression ring 46 Threadably secured upon the external surface 44 is a compression ring 46.
- the support pad 32 is disposed upon an outwardly extending lip or flange 36 of the cylindrical member 42. It should be apparent to those skilled in the art that the support pad 32 is captured between the flange 48 and the compression ring 46. It should also be noted that the flange 36 is received within the reduced thickness area of the support pad 32.
- the end of the cylinder adjacent the flange 36 def 3 a recess which is adapted to receive the flange 20 on the nut 18 so that when assembled on the mounting device, the flange 20 is below the abrasive finishing articles on the surface 12 of the disc 10 to preclude the flange coming into contact with the work piece.
- an additional backing member or disc 50 may be provided along with the support pad 32 to provide additional rigidity.
- the additional backup disc 50 may be constructed of metal. Under those circumstances, it may also be desirable to provide an elastomeric washer 52 which is seated between the metal disc 50 and the compression ring 46 to assist in securing the back pad and supporting discs in proper relation to provide the support desired for the abrasive finishing disc 10.
- the drive member 30 includes a flange 54 which seats against a surface 56 of the cylinder 42.
- the cylinder 42 defines an opening 58 through which the drive member extends.
- the portion 60 of the drive member extending through the opening 58 carries an O-ring 62 which provides frictional engagement with the opening 58.
- the support member is retained upon the drive member 30 during the time the coated abrasive disc 10 is detached for removal and replacement after it is spent. It is an important feature of the present invention that the support member is not in any way threadably attached to the drive member 30. It should be recognized that the support pad 32 along with the abrasive disc 10 is rotatable with respect to the drive member 30.
- the abrasive disc 10 and the support pad 32 may be rotated by hand to attach the nut 18 to the threads 28 on the end of the drive member 30.
- the together (or simultaneously) support pad along with the disc may be rotated in the opposite direction by hand once the disc is spent to remove the nut 18 from the threaded end 28 of the drive member 30.
- FIG. 2 the apparatus in accordance with the present invention is illustrated in partially exploded schematic fashion without the abrasive disc.
- the same reference numerals are utilized for the same parts as set forth in the description of Figure 1.
- the recess on the end of the cylinder adjacent the flange 36 is more clearly shown at 64.
- the flange 20 on the nut 18 seats within the recess 64 with the coated abrasive disc trapped between the flange 20 and the bottom of the recess 64 to thus cause the flange 20 to be positioned below the outer surface of the abrasive disc so that it will not come into contact with the work piece.
- FIG. 3 there is illustrated a partially exploded view similar to that of Figure 2 but with a modified mounting device adapted for use with larger abrasive discs.
- a hollow cylindrical member 70 defines a recess or groove 72 therein which receives an O-ring 74.
- a washer like member 76 is adhered to the cylindrical member 70 either by being physically attached or the like and traps the O-ring 74 in place.
- the O-ring 74 engages the threads which appear on the shaft 78 of the power tool spindle 80 and assists in holding the support member 82 on the power tool spindle during the time the spent abrasive disc is being removed, discarded, and replaced with a new abrasive disc.
- the nut 84 used with this embodiment is slightly larger and constructed to include a tapered surface 86 which substantially mates with the recess 88 formed on the surface of the cylindrical member 70 adjacent the flange 90 which is used to grip the support pad in place.
- the shank 92 of the nut 18 has formed thereon the irregular surface 22 in the form of alternating ridges and grooves which preferably are substantially parallel to the longitudinal axis of the nut 18.
- the ridges cut into the surface defining the central aperture in such a way that an interference fit is formed between the nut 18 and the central aperture in the abrasive disc 10.
- the interference fit then provides the ability to turn the disc 10 and at the same time, turn the nut 18 so that the threads formed internally in the bore provided therein engage the threads 28 on the drive member 30 thus, pulling the flange 20 on the nut 18 down and into the recess 64 carrying with it that portion of the abrasive disc 10 immediately surrounding the aperture through which the shank 92 has been extended thereby clamping the disc 10 in place on the support pad 32 for use.
- the abrasive disc 10 may be constructed of any coated abrasive material know to those skilled in the art.
- the disc 10 may be formed of cloth, paper, vulcanized fiber, or the like.
- FIG. 5A the nut having the alternating ridges and grooves is illustrated.
- Figure 5B an irregular surface is provided in the form of elastomeric cylinder surrounding the barrel of the nut below the flange.
- the irregular portion can be enlarged greatly with respect to the size of the aperture through the abrasive disc or may have ridges and grooves arranged in a manner other than parallel to the axis as shown or alternatively the area immediately below the flange may be enlarged to a diameter greater than the aperture in the disc to provide an interference fit without any irregularities in the surface.
- the support pad 32 is shown in greater detail and the reduced diameter area is shown more clearly at 94.
- the plastic material of the support pad 32 as shown at 96 may be any type of plastic material desired but preferably, would be molybdenum disulfide filled nylon material.
- the support pad 98 could be formed totally of the molybdenum disulfide filled nylon with the reduced diameter section 100 thereof adjacent the opening 102 therethrough.
- the surface 104 of the support pad 98 does not have a surface formed of an elastomeric material or any other material which could provide a gripping surface with regard to the coated abrasive disc.
- the pad of the type shown in Figure 7 would be utilized with a larger coated abrasive disc than would the pad in Figure 6.
- a mounting device for a coated abrasive finishing article in the form of a coated abrasive disc which may be reused indefinitely and which permits easy attachment and detachment by hand without the use of tools for the replacement of spent abrasive discs.
- the mounting device is constructed in such a manner that the nut for attaching the abrasive disc to the support member is recessed below the surface of the abrasive disc and thus will not contact a work piece during use.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01992449A EP1355762A4 (en) | 2000-10-30 | 2001-10-30 | Mounting device for coated abrasive finishing articles |
AU2002232926A AU2002232926A1 (en) | 2000-10-30 | 2001-10-30 | Mounting device for coated abrasive finishing articles |
US10/398,839 US6840849B2 (en) | 2001-01-31 | 2001-12-18 | Mounting device for coated abrasive finishing articles |
CA002428666A CA2428666A1 (en) | 2001-01-31 | 2001-12-18 | Mounting device for coated abrasive finishing articles |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24440100P | 2000-10-30 | 2000-10-30 | |
US60/244,401 | 2000-10-30 | ||
US26548501P | 2001-01-31 | 2001-01-31 | |
US60/265,485 | 2001-01-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002060644A1 true WO2002060644A1 (en) | 2002-08-08 |
WO2002060644A8 WO2002060644A8 (en) | 2003-11-20 |
Family
ID=29714872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/050905 WO2002060644A1 (en) | 2000-10-30 | 2001-10-30 | Mounting device for coated abrasive finishing articles |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1355762A4 (en) |
AU (1) | AU2002232926A1 (en) |
WO (1) | WO2002060644A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006099264A2 (en) * | 2005-03-14 | 2006-09-21 | Mackay Joseph H | Expendable unitary quick mount abrasive discs and support pad therefor |
EP2045039A1 (en) * | 2007-10-02 | 2009-04-08 | Gerd Eisenblätter GmbH | Grinding or polishing disk with thread element |
AT512572A1 (en) * | 2012-06-05 | 2013-09-15 | Berndorf Band Gmbh | Polished plate with polishing cloth |
US10926377B2 (en) * | 2015-11-26 | 2021-02-23 | Quintin James Broussard | Sanding pad for a sander, such as an eccentric sander |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4924634A (en) * | 1986-04-03 | 1990-05-15 | Mackay Joseph H Jun | Finishing article having an integral mounting hub and improved base |
US6379234B1 (en) * | 1999-06-14 | 2002-04-30 | Mackay Joseph H. | Reusable mount for abrasive devices |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3315420A (en) * | 1964-11-17 | 1967-04-25 | Atlas Copco Ab | Holder for abrasive disks |
-
2001
- 2001-10-30 AU AU2002232926A patent/AU2002232926A1/en not_active Abandoned
- 2001-10-30 EP EP01992449A patent/EP1355762A4/en not_active Withdrawn
- 2001-10-30 WO PCT/US2001/050905 patent/WO2002060644A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4924634A (en) * | 1986-04-03 | 1990-05-15 | Mackay Joseph H Jun | Finishing article having an integral mounting hub and improved base |
US6379234B1 (en) * | 1999-06-14 | 2002-04-30 | Mackay Joseph H. | Reusable mount for abrasive devices |
Non-Patent Citations (1)
Title |
---|
See also references of EP1355762A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006099264A2 (en) * | 2005-03-14 | 2006-09-21 | Mackay Joseph H | Expendable unitary quick mount abrasive discs and support pad therefor |
WO2006099264A3 (en) * | 2005-03-14 | 2007-01-11 | Joseph H Mackay | Expendable unitary quick mount abrasive discs and support pad therefor |
EP2045039A1 (en) * | 2007-10-02 | 2009-04-08 | Gerd Eisenblätter GmbH | Grinding or polishing disk with thread element |
AT512572A1 (en) * | 2012-06-05 | 2013-09-15 | Berndorf Band Gmbh | Polished plate with polishing cloth |
US10926377B2 (en) * | 2015-11-26 | 2021-02-23 | Quintin James Broussard | Sanding pad for a sander, such as an eccentric sander |
Also Published As
Publication number | Publication date |
---|---|
EP1355762A1 (en) | 2003-10-29 |
WO2002060644A8 (en) | 2003-11-20 |
EP1355762A4 (en) | 2005-01-12 |
AU2002232926A1 (en) | 2002-08-12 |
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