WO1994023899A1 - Tool - Google Patents
Tool Download PDFInfo
- Publication number
- WO1994023899A1 WO1994023899A1 PCT/EP1994/001220 EP9401220W WO9423899A1 WO 1994023899 A1 WO1994023899 A1 WO 1994023899A1 EP 9401220 W EP9401220 W EP 9401220W WO 9423899 A1 WO9423899 A1 WO 9423899A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tool
- locking member
- elongate recess
- drum
- sheet
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
- B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of 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
- B24D9/003—Wheels having flaps of flexible abrasive material supported 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
- B24D9/04—Rigid drums for carrying flexible material
Definitions
- This invention relates to a tool and, more particu ⁇ larly, to a tool which is provided with one or more locking members.
- US-A-3 818 651 discloses a drum sander having an annular rim the circumference of which is covered with a sheet of abrasive material.
- the ends of the sheet mater ⁇ ial extend into a radially outwardly tapered slot in which a C-shape sleeve is rotatably mounted.
- the C-shape sleeve subtends an angle of about 320°.
- the free ends of the sheet are inserted into the C-shape sleeve which is then rotated to trap the sheet between the outer perimeter of the C-shaped sleeve and the wall of the outwardly tapered slot. It will be noted that the maximum gripping force is determined by the inherent resilience in the C-shaped sleeve.
- UK-A-1 529 005 discloses a polishing wheel the outer surface of which is divided into six segments each covered by an abrasive strip.
- Each abrasive strip ex ⁇ tends over its allotted segment and each end of the abrasive strip is turned inwardly and held in position by rotation of a respective pivotally mounted shaft having an eccentric cam mounted thereon.
- This arrange ⁇ ment is relatively heavy, complex and expensive.
- the shaft becomes unable to restrain the strip remote from the bearing in a satisfactory manner.
- a tool having an elongate recess for accommoda ⁇ ting a locking member, a locking member in said elongate recess and a slot through which an item to be secured can be inserted into said elongate recess, characterized in that said locking member comprises an inelastic bar which can be turned from an inoperative position in which said item can be inserted into said elongate recess via said slot and an operative position in which at least a major portion of the length of said inelastic bar acts between one side of said elongate recess and said item to trap said item against an oppo ⁇ site side of said elongate recess.
- said elongate recess is of substantial ⁇ ly circular cross-section.
- part of said locking member is of substantially circular cross-section and part is flat.
- part of said locking member between said part of substantially circular cross-section and said flat is rounded.
- the length of said locking member is substantially equal to the length of said elongate recess.
- At least one end of said locking member is provided with a socket.
- said items is a sheet of abrasive material and said tool is a sander.
- said sander is provided with a layer of resilient material to support said abrasive material.
- said sander is a drum sander.
- the present invention also provides a tool in accordance with the invention with a sheet of abrasive material attached thereto.
- the tool comprises a rotor of a rotary planer and said item is a blade therefor.
- Figure 1 is a side view of one embodiment of a tool in accordance with the present invention with a sheet of abrasive material mounted thereon;
- Figure 2 is an end view looking in the direction of line II-II on Figure 1;
- Figure 3 is a fragmenting view showing, on an en ⁇ larged scale, a detail of the tool shown in Figure 2;
- Figure 4 is a perspective view of a locking member
- Figure 5 is a view similar to Figure 3 showing the sheet of abrasive material being mounted on the tool;
- Figure 6 is a perspective view of a second embodi ⁇ ment of a tool in accordance with the present invention with a sheet of abrasive material mounted thereon;
- Figure 7 is a perspective view of a third embodiment of a tool in accordance with the present invention with two sheets of abrasive material mounted thereon;
- Figure 8 is a perspective view of a fourth embodi ⁇ ment of a tool in accordance with the present invention with a sheet of abrasive material mounted thereon.
- the drum sander 1 comprises a drum 2 which is made of rigid plastics material (PVC) and is mounted on an arbor 3.
- a layer 4 of resilient plastics material (foam) is permanently glued to the outside of the drum 2 and acts as a cushion for a sheet 5 of sandpaper.
- the locking member 10 com ⁇ prises a bar of aluminium which is coextensive with the recess 9 and is provided at each end with a socket 11 which can accommodate a hexagonal key.
- the recess 9 was drilled to a diameter of mm.
- the locking member 10 was formed from aluminium rod of mm dia ⁇ meter leaving a clearance of mm between the rod and the recess 9.
- a flat 12 is formed on the aluminium rod by machining a maximum of mm from one edge. The junction between one end of the flat 12 and the circumference of the rod is then radiused as shown by reference number 13.
- a sheet 5 of sandpaper is cut to approxima ⁇ tely the correct length, wrapped around the drum 2 and the ends 6 and 7 are pushed through slot 8 into recess 9.
- a hexagonal key is then inserted into socket 11 and rotated anti-clockwise. This action wedges the ends 6 and 7 between the locking member 10 and the recess 9. Any tendency for the ends 6 and 7 to be pulled into the recess 9 merely tightens the sandpaper about the drum 2 and slightly compress the layer 4. A tight fit is, of course, highly desirable.
- the drum sander 1 is intended to be rotated at up to 3600rpm.
- the position of the recess is preferably set so that the amount of material removed from the drum 2 for the recess 9 and the slot 8 is substantially dynamically balanced by the locking member 10 and the ends of 6 and 7 of the sheet 5.
- FIG 6 shows a miniature drum sander which is generally identified by reference numeral 101.
- the construction of the drum sander 101 is generally similar to the drum sander 1 and parts having similar functions have been identified by similar reference numerals to those used in Figures 1 to 5 but in the 100 series.
- the major difference between the embodiments is that the recess 109 lies on the longitudinal axis of the drum sander 101.
- the drum 102 is made from solid steel.
- a drum sander 201 is covered with two sheets 205A and 205B of sandpa ⁇ per.
- the sheets 205A and 205B are secured to the drum sander by two locking bars 210 A, 210B mounted in re ⁇ spective recesses 209A, 209B provided on opposite sides of the drum 202.
- Figure 8 shows a sheet 305 of abrasive material secured to a hand sander 301 by two locking members 310 which are disposed in respective recesses 309 as shown.
- the diameter of the drum of the drum sander shown in Figure 6 would be about 25mm.
- the dia ⁇ meter of the drum shown in Figure 1 either 45mm or 60mm and the diameter of the drum shown in Figure 7 about 75mm.
- the thickness of abrasive sheets varies signific ⁇ antly according to the grade of abrasive required. However, most sheets are about 1mm thick. The width of the slot 8 is therefore about 3mm.
- the diameter of the recesses 9 and the starting diameter of the rod from which the locking member 10 is formed is typically as follows : - Diameter of Diameter of Diameter of Drum (mm) Recess 9(mm) Locking Bar
- the locking member 10 acts between one part of the recess 9 and the ends 7 and 8 of the sheet 5 to trap the ends 6 and 7 against the oppo ⁇ site side of the elongate recess 9 over the entire length thereof. Whilst this is wholly recommended it is conceivable that an embodiment in which only a major portion of the length of the locking member is operative would be acceptable for light duty. Such might be achieved by, for example castellating the substantially circular portion and/or the flat of the locking member to provide spaced fingers of contact with the one side of the recess and/or the sheet of abrasive material.
- aluminium is the preferred inelastic mater ⁇ ial for the locking member
- suitable materials could comprise, for example steel.
- a rigid plastics material, could also be used.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU65694/94A AU6569494A (en) | 1993-04-16 | 1994-04-15 | Tool |
DE69404644T DE69404644T2 (en) | 1993-04-16 | 1994-04-15 | TOOL |
EP94913613A EP0693986B1 (en) | 1993-04-16 | 1994-04-15 | Tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9307863A GB2277118B (en) | 1993-04-16 | 1993-04-16 | Tool |
GB9307863.2 | 1993-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994023899A1 true WO1994023899A1 (en) | 1994-10-27 |
Family
ID=10733937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1994/001220 WO1994023899A1 (en) | 1993-04-16 | 1994-04-15 | Tool |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0693986B1 (en) |
AT (1) | ATE156055T1 (en) |
AU (1) | AU6569494A (en) |
CA (1) | CA2158649A1 (en) |
DE (1) | DE69404644T2 (en) |
ES (1) | ES2105694T3 (en) |
GB (1) | GB2277118B (en) |
WO (1) | WO1994023899A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0729807A1 (en) * | 1995-02-28 | 1996-09-04 | Gerd Braasch | Grinding tool of which the working surface is equipped with a grinding means and grinding means for a grinding tool |
FR2748679A1 (en) * | 1996-05-15 | 1997-11-21 | Elbe Sa Soc | Cylindrical sander for power tool |
US10150117B2 (en) | 2014-04-10 | 2018-12-11 | 10X Genomics, Inc. | Fluidic devices, systems, and methods for encapsulating and partitioning reagents, and applications of same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19962485C2 (en) * | 1999-12-23 | 2002-04-25 | Reinhard Becher | grinding roller |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1975630A (en) * | 1931-03-11 | 1934-10-02 | William A F Boettcher | Sanding roller |
US2452409A (en) * | 1947-01-03 | 1948-10-26 | Wiley W Wickman | Rotary abrading device |
US2569253A (en) * | 1950-05-08 | 1951-09-25 | Herman T Opland | Sander tool |
US2654192A (en) * | 1952-06-02 | 1953-10-06 | Lynch Lawrence | Rotary abrading strip holder |
FR1039994A (en) * | 1951-07-19 | 1953-10-12 | Sander | |
CH332593A (en) * | 1955-04-13 | 1958-09-15 | Staub Josef | Tool for polishing workpieces |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB578027A (en) * | 1943-10-04 | 1946-06-12 | Sterling Tool Products Company | Improvements in or relating to rubbing, sanding, or polishing machine |
GB613725A (en) * | 1946-06-28 | 1948-12-02 | Herbert Charteris Flind | Improvements in or relating to means for fastening flexible sheet material to a support |
US3220664A (en) * | 1962-08-06 | 1965-11-30 | Minnesota Mining & Mfg | Attaching means for reels |
US3818651A (en) * | 1972-11-22 | 1974-06-25 | P Eells | Abrading and polishing wheels |
FR2321981A1 (en) * | 1975-08-26 | 1977-03-25 | Emain Jean | POLISHING WHEEL IMPROVEMENT |
-
1993
- 1993-04-16 GB GB9307863A patent/GB2277118B/en not_active Expired - Fee Related
-
1994
- 1994-04-15 DE DE69404644T patent/DE69404644T2/en not_active Expired - Fee Related
- 1994-04-15 ES ES94913613T patent/ES2105694T3/en not_active Expired - Lifetime
- 1994-04-15 AU AU65694/94A patent/AU6569494A/en not_active Abandoned
- 1994-04-15 CA CA002158649A patent/CA2158649A1/en not_active Abandoned
- 1994-04-15 EP EP94913613A patent/EP0693986B1/en not_active Expired - Lifetime
- 1994-04-15 AT AT94913613T patent/ATE156055T1/en not_active IP Right Cessation
- 1994-04-15 WO PCT/EP1994/001220 patent/WO1994023899A1/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1975630A (en) * | 1931-03-11 | 1934-10-02 | William A F Boettcher | Sanding roller |
US2452409A (en) * | 1947-01-03 | 1948-10-26 | Wiley W Wickman | Rotary abrading device |
US2569253A (en) * | 1950-05-08 | 1951-09-25 | Herman T Opland | Sander tool |
FR1039994A (en) * | 1951-07-19 | 1953-10-12 | Sander | |
US2654192A (en) * | 1952-06-02 | 1953-10-06 | Lynch Lawrence | Rotary abrading strip holder |
CH332593A (en) * | 1955-04-13 | 1958-09-15 | Staub Josef | Tool for polishing workpieces |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0729807A1 (en) * | 1995-02-28 | 1996-09-04 | Gerd Braasch | Grinding tool of which the working surface is equipped with a grinding means and grinding means for a grinding tool |
FR2748679A1 (en) * | 1996-05-15 | 1997-11-21 | Elbe Sa Soc | Cylindrical sander for power tool |
US10150117B2 (en) | 2014-04-10 | 2018-12-11 | 10X Genomics, Inc. | Fluidic devices, systems, and methods for encapsulating and partitioning reagents, and applications of same |
Also Published As
Publication number | Publication date |
---|---|
GB9307863D0 (en) | 1993-06-02 |
EP0693986B1 (en) | 1997-07-30 |
EP0693986A1 (en) | 1996-01-31 |
GB2277118B (en) | 1996-01-03 |
DE69404644T2 (en) | 1997-11-27 |
ES2105694T3 (en) | 1997-10-16 |
AU6569494A (en) | 1994-11-08 |
GB2277118A (en) | 1994-10-19 |
ATE156055T1 (en) | 1997-08-15 |
DE69404644D1 (en) | 1997-09-04 |
CA2158649A1 (en) | 1994-10-27 |
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