EP0141139B1 - Suction housing for vacuum sanding devices - Google Patents
Suction housing for vacuum sanding devices Download PDFInfo
- Publication number
- EP0141139B1 EP0141139B1 EP84110392A EP84110392A EP0141139B1 EP 0141139 B1 EP0141139 B1 EP 0141139B1 EP 84110392 A EP84110392 A EP 84110392A EP 84110392 A EP84110392 A EP 84110392A EP 0141139 B1 EP0141139 B1 EP 0141139B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- plate
- backup pad
- vacuum
- opening
- 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.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
- B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
- B24B55/105—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
- B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
- B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
-
- 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
Definitions
- the present invention is constructed so as to overcome the many deficiencies of the prior art and to provide a very efficient, light and easy-to- use vacuum sander through the incorporation of a housing that allows a sanding operator to get his sand paper close to if not right at corner portions and hard to get at areas.
- a housing that allows a sanding operator to get his sand paper close to if not right at corner portions and hard to get at areas.
- the present invention according to claim 1, the housing of which is adapted for use on numerous forms of sanders such as double action or orbital sanders, rotary grinders, rectangular block sanders and hand block sanders. It is also usable on rectangular vibratory sanders.
- Figure 1a a The embodiment shown in Figure 1a a is basically the same as that in Figure 1 but the conduit 40 is taken off the side ofthe housing 14and notthe seal ring 32.
- Fig. 12 illustrates a further embodiment.
- the nylon suction ring 28 is attached to the backup pad 11 as in Fig. 8. Additionally, however, a further flexible cone 100 or skirt is secured at its upper end to the suction housing (not shown) and extends all the way down to the surface to be sanded and over the nylon seal ring 28.
- the flexible cone or skirt has inwardly projecting dimples or projections 104 which spaces the skirt from the surface of the plastic ring 28 and the skirt 102 is flexible enough that it allows the backup pad and skirt 28 to vibrate and rotate under the skirt without wearing the pad away.
Abstract
Description
- This invention relates to vacuum sanding devices and in particular to a housing for use in conjunction with such sanding devices according to the pre-characterising part of claim 1.
- Vacuum sanding devices have been known for sometime. They are usually rotary grinders or double action sanders although patents have also issued for vacuum sanders of a rectangular format. Examples of such rectangular vacuum sanders are to be found in U.S. Patent 4,062,152 of December 13th, 1977 Mehrer, 3,123,946 of March 10th, 1964 Hoveland, 2,499,933 of March 7th, 1950 Smul. In circular vacuum sanding devices, examples may be found in Applicant's Canadian Patent 1,080,477 August 1st, 1980, Canadian Patent 931,761 to Olmoen, U.S. Patents 3,785,092 Hutchins, 2,895,266 Statler, U.S. 4,164,101 Robert and 3,862,521 January 28th, 1975. A vacuum sander of the above-mentioned type is disclosed in FR-A-2 332 842.
- There are several disadvantages in the construction of the prior art patented devices. Many of them are complicated, incorporating too many moving parts and are therefore expensive to manufacture and maintain. Others do not provide adequate suction adjacent the immediate work area and, if they do, they sometimes have upper housings that are spaced substantially outwardly of the backup pads or sanding blocks so that the sanding blocks can never reach deeply into corners or hard-to-get-at areas.
- The present invention is constructed so as to overcome the many deficiencies of the prior art and to provide a very efficient, light and easy-to- use vacuum sander through the incorporation of a housing that allows a sanding operator to get his sand paper close to if not right at corner portions and hard to get at areas. This is achieved by the present invention according to claim 1, the housing of which is adapted for use on numerous forms of sanders such as double action or orbital sanders, rotary grinders, rectangular block sanders and hand block sanders. It is also usable on rectangular vibratory sanders.
- The invention relates to a housing for a vacuum sander of the type that includes a backup pad. The housing comprises a plate having leg members on its lower surface for spacing the plate above the upper surface of the backup pad, a lip member on the periphery of the housing defining a relatively narrow peripheral opening between the edge of the housing and the backup pad underneath it, the peripheral edge of the housing being coterminous or nearly so, with the peripheral edge of the backup pad.
- When the invention is used on circular or rotary sanders, the peripheral portion of the housing reaches down close to the edge of the backup pad and therefore very close to the sanding surface. The housing is therefore instrumental in sucking up dust all around the rim of the operating sander. The backup pads used with vacuum sanders normally have holes in the center part all the way through to an upper chamber formed by a flexible collar extending downwardly from the rotating mechanism to the housing. This combination of the vacuum hole through the backup pad and the peripheral vacuum inlet formed by the housing, forces the suction to draw the dust through the holes and all around the backup pad from the sanded surface. The edge of the suction housing is preferably flexible so that if an operator hits an edge, it gives and flexes back to its original position.
- In a rectangular form such as a pole sander or hand sander, again there is a gap between the peripheral lip of the housing plate and the upper surface of the backup pad and this causes the vacuum to suck the dust all around and through the edge of the sanding block as well as through apertures in the associated backup pad. The apparatus picks up dust in the front, sides and rear portions equally.
- The invention is illustrated in the accompanying drawings in which:
- Figure 1 is a cross sectional view of a vacuum sander incorporating the present invention;
- Figure 1a is a modified version of the embodiment of Figure 1;
- Figure 2 is a fragmentary, perspective view of a portion of the housing of the present invention;
- Figure 3 is a view similar to Figure 1 but showing a somewhat different arrangement of the housing;
- Figure 4 is a plan view of another embodiment of the invention;
- Figure 5 is a sectional view taken along the line 5-5 of Figure 4;
- Figure 6 is a sectional view taken along the line 6-6 of Figure 5;
- Figure 7 is a cross sectional view of another embodiment of the invention;
- Figure 8 is a sectional view of another embodiment of the invention;
- Figure 9 is a bottom view, partially cut away, of the embodiment of Figure 8;
- Figure 10 is a sectional view of a portion of the Figure 8 embodiment; and
- Figure 11 is a top view of Figure 10; and
- Figure 12 is a sectional view similar to Figure 8 of a further embodiment of the invention.
- Referring to Figures 1, 1a and 2, the
housing 10 is illustrated as being mounted on thebackup pad 12 of a rotary grinder or orbital sander including avacuum housing 14. Thebackup pad 12 is connected by astud 16 to amotor shaft 18 which rotates thebackup pad 12 and an abrasive disc mounted on its lower surface. - The
housing 10 comprises anupper plate portion 20 of circular configuration having a central,upstanding flange 22 and aperipheral lip member 24 depending therefrom and extending outwardly and downwardly from the plate member. The lower surface of the plate member is provided with a plurality oflegs 26 which serve to space thehousing plate 20 upwardly from thebackup pad 12 as shown in Figure 1. This spacing can be varied in accordance with the length of thelegs 26 used in the particular requirements of the operation. In any case, the spacing of thevacuum housing plate 20 above the upper surface of thebackup pad 12 defines a vacuum chamber which is in communication with a large vacuum exit or opening 30 defined by theflange 22. In the embodiment of Figure 1, aresilient seal ring 32 mounted on the body of thevacuum housing 14 extends downwardly and rests on the upper surface of thehousing plate 20. This serves to seal the vacuum chamber so that any air drawn into the chamber must come in either throughapertures 34 in the bottom of thebackup pad 12 or in through theperipheral opening 36 defined between thelip member 24 and thesloped surface 38 of the backup pad. - The
flexible sealing ring 32 may include aconduit 40 for detachable connection to suitable vacuum means, not shown. - The embodiment shown in Figure 1a a is basically the same as that in Figure 1 but the
conduit 40 is taken off the side ofthe housing 14andnotthe seal ring 32. - The embodiment illustrated in Figure 3 is similar to that shown in Figure 1 but the
backup pad 12 is of somewhat different configuration and thelegs 27 spacing theplate 21 above the backup pad are longer than thelegs 26 in the embodiment of Figure 1. Moreover, instead of having a circular opening as definedbytheflange 22 in Figure 1, theplate 21 has a series ofapertures 23 which allow passage of air upwardly through theapertures 34 in the backup pad and through theperipheral opening 36 into the chamber defined by thering 32 and outwardly through thevacuum conduit 40. - ltwill be appreciated that in eitherthe Figure 1 or Figure 3 embodiment, the
peripheral edge 25 of thelip 24 and theperipheral edge 13 of the backup pad are coterminous or nearly so with one another so that an operator can move the sanding device right into hard-to-get-at areas such as corners, valleys, etc. Thehousing 10 can be manufactured from a flexible plastic material so that if thelip 24 contacts any part oftheworking surface, it will give and then return to its original location. - Turning now to the embodiment in Figures 4-6, the housing of the embodiment in Figure 4 consists of an elongated
rectangular plate 42 having a series of dependinglegs 44 which serve to space theplate 42 above abase member 46 and to which is attached a sanding block orbackup pad 48. As with the embodiment of Figures 1-3, the spacing of theplate 42 above thebase member 46 defines avacuum chamber 50 which is in communication with external vacuum means through a circular upstanding flange 52to which one end of aflexible tube 54 is connected. - This embodiment of Figures 4-6 is provided with a universal joint indicated generally at 56 and includes a pair of
upright plate members 58 integral with or otherwise secured to thebase member 46 and extending upwardly through the opening defined by theflange 52.Plates 58 support aroll pin 60 to which is attached a T-shape member 62 allowing horizontal movement in one direction ofthatT-shaped member. The upper part ofmember 62 is provided with anotherroll pin 64 at right angles topin 60 and it provides horizontal movement to aconnector 66 attached to it. The connector in turn is adapted for detachable securement to the terminal end of avacuum pipe 68 which may also serve the function of an elongated handle for actuating the sander. - Looking at Figures 5 and 6, itwill be seen that the
base member 46 is provided with achamfered edge portion 70 and thehousing plate 42 is, as in Figure 1, provided with aperipheral lip 72 extending outwardly and downwardly from theplate 42 so that the converging edges of thelip 72 and the chamfered edge of thebase plate 46 define aperipheral opening 74. It will also be noted that the edge of thebase member 46 and the terminal edge of thelip members 72 are coterminous with one another so that an operator can move the sanding device into corners and other hard-to-get-at locations during the sanding operation. - Turning now to Figure 7, the
vacuum sander 76 has the same basic configuration as the sander in Figures 4 and 5 but instead of theplate 42 having a central opening for attachment to vacuum means, thehousing plate 78 has an integrally formed handle member80 and as the handle member80 is of tubular construction, it provides communication between thechamber 82 defined between theplate 78 and thebase 84 and external vacuum means, not shown, which is attached to the handle at asuitable outlet 86. As in the embodiment of Figure 5, thehousing plate 78 is attached to thebase 84 bysuitable screws 88 extending throughlegs 90, the backup pad orsanding block 92 being attached to the lower end of the base. Theperipheral lip 94 of theplate 78 is spaced somewhat from thechamfered edge 96 of thebase 84 so thatperipheral opening 98 is provided. - Turning now to Figures 8 and 9 a housing 9 has secured thereto a backup pad 11 that is provided with at least one
circular suction channel 15, two such channels being illustrated. Depending on work requirements, diameter of the pad, etc. several concentric or one single channel would be used. As seen in Figure 8, the channels are preferably the same or somewhat greater in width than the diameter of theapertures 17 which are provided in the base of the pad 11. As shown in the bottom view of the pad in Figure 9,circular channel 15interconnects apertures 17 while channel15a interconnects apertures 17a. - It will be appreciated that with the provision of the
suction channels 15, 15a it is unnecessary for an operator to line up suction holes in a sanding disc with theapertures 17 in the pad and, further, it is unnecessary to use a loading device with a centering pin for that purpose. With the circular suction channels the operator just sticks the paper to the backup pad using the outside diameter of the paper and backup pad as a guide and, while the holes in the paper may not align vertically with theapertures 17 in the pad 11, the holes in the paper will overlie an associatedchannel 15 or 15a so that, in operation, dust is sucked up through thechannel 15, then through theaperture 17 and into the housing above. At the same time dust is also being drawn into theperipheral opening 23 between the housing lip and the edge of the pad 11. - It will be understood that sanding discs having one or two concentric rings of holes can be used on a pad according to Figures 8 and 9.
- Looking to Figures 10 and 11, the inside surface of the frusto-
conical skirt 28 of the housing may be provided with a series ofshallow ribs 29, shown in phantom line in Figure 11. These ribs prevent the closing off of thespace 31 between the inside of the suction skirt and the edge of the backup pad when the operator applies downward pressure on the edge of the pad against awork surface 33 as shown in Figure 10. - Fig. 12 illustrates a further embodiment. The
nylon suction ring 28 is attached to the backup pad 11 as in Fig. 8. Additionally, however, a furtherflexible cone 100 or skirt is secured at its upper end to the suction housing (not shown) and extends all the way down to the surface to be sanded and over thenylon seal ring 28. The flexible cone or skirt has inwardly projecting dimples orprojections 104 which spaces the skirt from the surface of theplastic ring 28 and theskirt 102 is flexible enough that it allows the backup pad andskirt 28 to vibrate and rotate under the skirt without wearing the pad away. - With this additional flexible skirt, it is not necessary to have
apertures suction ring 28 and flexible collar orskirt 102. - It will be appreciated in all embodiments of the present invention that the peripheral opening allows efficient vacuuming of dust that accumulates anywhere around the periphery of the sanding device whether it is circular or horizontal. The dust can be drawn in through the back, sides or front of the device to provide a much more efficient unit than is available in the prior art. The arrangement of the present invention can be used on all rectangular vibrators, hand sanders, pole sanders and disc sanders or long body files. The housing can be made out of various materials such as nylon, fiberglass or various alloys.
- The invention is effective either using the peripheral suction alone or in combination with suction apertures such as 34 in Figures 1 and 3 or 45 in Figures 5 and 7 which extend through the backup pad and or base from the work surface to the vacuum chamber.
- While the present invention has been described in connection with specific embodiments thereof and specific uses, various modifications will occur to those skilled in the art without departing from the scope of the invention as set forth in the appended claims.
- The terms and expressions which have been employed in this description are used as terms of description and not of limitation and there is no intention in the use of such terms and expressions to exclude any equivalence of the features described or portions thereof. It is recognized that various modifications are possible within the scope of the invention as claimed.
Claims (8)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU33945/84A AU570075B2 (en) | 1983-08-31 | 1984-08-31 | Suction housing for vacuum sanding devices |
PCT/EP1984/000264 WO1985001004A1 (en) | 1983-08-31 | 1984-08-31 | Suction housing for vacuum sanding devices |
AT84110392T ATE38633T1 (en) | 1983-08-31 | 1984-08-31 | EXHAUST HOOD FOR VACUUM HAND GRINDER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA435796 | 1983-08-31 | ||
CA000435796A CA1214042A (en) | 1983-08-31 | 1983-08-31 | Suction housing for vacuum sanding devices |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0141139A2 EP0141139A2 (en) | 1985-05-15 |
EP0141139A3 EP0141139A3 (en) | 1985-06-19 |
EP0141139B1 true EP0141139B1 (en) | 1988-11-17 |
Family
ID=4125983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84110392A Expired EP0141139B1 (en) | 1983-08-31 | 1984-08-31 | Suction housing for vacuum sanding devices |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0141139B1 (en) |
JP (1) | JPS61500159A (en) |
AT (1) | ATE38633T1 (en) |
AU (1) | AU570075B2 (en) |
CA (1) | CA1214042A (en) |
DE (1) | DE3475173D1 (en) |
ES (1) | ES289580Y (en) |
WO (1) | WO1985001004A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT397780B (en) * | 1991-09-27 | 1994-06-27 | Swarovski Tyrolit Schleif | ANGLE GRINDING MACHINE |
US5518442A (en) * | 1993-01-22 | 1996-05-21 | Porter-Cable Corporation | Sander |
US5392568A (en) * | 1993-12-22 | 1995-02-28 | Black & Decker Inc. | Random orbit sander having braking member |
DE19723987A1 (en) * | 1997-06-06 | 1998-12-10 | Engelbert Gmeilbauer | Grinding tool, in particular for hand-held oscillation devices |
IT1317189B1 (en) * | 2000-04-07 | 2003-05-27 | Guido Valentini | MOTORIZED TOOL FOR SURFACE PROCESSING |
NL1018819C2 (en) * | 2001-08-24 | 2003-02-25 | Tno | Power tool with dust extraction has air inlet near continuation of movement direction of particles released from workpiece |
WO2003018257A1 (en) * | 2001-08-24 | 2003-03-06 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Power tool with dust extraction |
WO2012020275A1 (en) * | 2010-08-10 | 2012-02-16 | Miksa Marton | Sanding apparatus |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3594958A (en) * | 1969-02-03 | 1971-07-27 | Clarkson Ind Inc | Dust collector for grinding tool |
SE362583B (en) * | 1972-03-07 | 1973-12-17 | Electrolux Ab | |
GB1408522A (en) * | 1973-04-26 | 1975-10-01 | Teda Lab I Eskilstuna Ab | Abrasive grit exhaust systems in grinding machines |
SE393554B (en) * | 1974-03-22 | 1977-05-16 | Atlas Copco Ab | DEVICE FOR HANDHALL PRESSURE FLUID-DRIVEN GRINDING MACHINES FOR SUCTION OF GRINDING DUST |
GB1466545A (en) * | 1974-03-26 | 1977-03-09 | Nederman B | Abrasive disc |
CA1027761A (en) * | 1975-11-26 | 1978-03-14 | Miksa Marton | Vacuum sander |
US4062152A (en) * | 1976-04-28 | 1977-12-13 | Mehrer Donald D | Vacuum sander |
FR2365411A1 (en) * | 1976-09-27 | 1978-04-21 | Robert Jean | SANDPAPER DISC SANDER MOUNTED ON A ROTATING CIRCULAR PLATE |
US4071981A (en) * | 1976-12-03 | 1978-02-07 | Champayne Roy J | Portable abrading machine with dust collecting system |
-
1983
- 1983-08-31 CA CA000435796A patent/CA1214042A/en not_active Expired
-
1984
- 1984-08-31 DE DE8484110392T patent/DE3475173D1/en not_active Expired
- 1984-08-31 AT AT84110392T patent/ATE38633T1/en not_active IP Right Cessation
- 1984-08-31 WO PCT/EP1984/000264 patent/WO1985001004A1/en unknown
- 1984-08-31 JP JP59503375A patent/JPS61500159A/en active Granted
- 1984-08-31 AU AU33945/84A patent/AU570075B2/en not_active Ceased
- 1984-08-31 ES ES1984289580U patent/ES289580Y/en not_active Expired
- 1984-08-31 EP EP84110392A patent/EP0141139B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3475173D1 (en) | 1988-12-22 |
WO1985001004A1 (en) | 1985-03-14 |
EP0141139A3 (en) | 1985-06-19 |
CA1214042A (en) | 1986-11-18 |
JPS6359825B2 (en) | 1988-11-21 |
ES289580Y (en) | 1986-10-01 |
JPS61500159A (en) | 1986-01-30 |
AU570075B2 (en) | 1988-03-03 |
AU3394584A (en) | 1985-03-29 |
EP0141139A2 (en) | 1985-05-15 |
ES289580U (en) | 1986-03-01 |
ATE38633T1 (en) | 1988-12-15 |
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