CA1262408A - Sander shield - Google Patents
Sander shieldInfo
- Publication number
- CA1262408A CA1262408A CA000523164A CA523164A CA1262408A CA 1262408 A CA1262408 A CA 1262408A CA 000523164 A CA000523164 A CA 000523164A CA 523164 A CA523164 A CA 523164A CA 1262408 A CA1262408 A CA 1262408A
- Authority
- CA
- Canada
- Prior art keywords
- segment
- shield
- top wall
- abrading
- skirt
- 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
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
ABSTRACT
A vacuum shield (22) for an abrading part of an abrad-ing machine (10) comprising a generally planar top wall (24) mounted on the abrading machine; the top wall of the shield being made of a rigid transparent mater-ial and has a first segment (28) having an aperture through which the abrading part (16) can be supported and driven by the abrading machine and a second segment (30) pivotally connected to the first segment for up-ward pivotal movement of the second segment about its connection to the first segment; a plurality of outlets (38) in said shield each adapted to receive a vacuum hose to provide pneumatic communication between the hose and the abrading parts; and a flexible skirt (26) depending from the peripheral edge of the top wall and extending substantially continuously along the entire length of the peripheral edge of the top wall;
the skirt substantially surrounding horizontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly relative to the first segment.
A vacuum shield (22) for an abrading part of an abrad-ing machine (10) comprising a generally planar top wall (24) mounted on the abrading machine; the top wall of the shield being made of a rigid transparent mater-ial and has a first segment (28) having an aperture through which the abrading part (16) can be supported and driven by the abrading machine and a second segment (30) pivotally connected to the first segment for up-ward pivotal movement of the second segment about its connection to the first segment; a plurality of outlets (38) in said shield each adapted to receive a vacuum hose to provide pneumatic communication between the hose and the abrading parts; and a flexible skirt (26) depending from the peripheral edge of the top wall and extending substantially continuously along the entire length of the peripheral edge of the top wall;
the skirt substantially surrounding horizontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly relative to the first segment.
Description
SANDf~R SHIELD
This invention relates to a vacuum attachment for an abrading machlne such as a portabZe rotary sander.
This invention particularly relates to a vacuum shield for enclosing, and removing dust generated by, the S abrasive wheel of a rotary sander while not interfering with the use of the sander.
Vacuum hoods or shields for tools, such as abrading machines, are well known. See, for example, US Patents 1r~ 3,673,744, 3,785,092, 3,824,745, 3,837,383, 3,935,678, 4,071,987, 4,135, 334, 4, 145,848 and 4,328,645. Typic-allyS the interiors of such shields have been connected to one or more Yacuum hoses which draw off dust gener-ated within the shields by the abrading machines.
However, such shields have hindered the vision of the users of the abrading machines enclosed by such shields and have also prevented the abrading parts of such machines from reaching surfaces adjacent to inter-2û secting walls or surfaces (e.g. in corners) which are to be abraded. This has made it difficult to use these shielded machines f'or abrading shaped and other non-flat su.rfaces to a highly smooth and uniform finish such as is required in the restoration and repair of, for example, the sheet metal panels of automobile bodies. ûne solution to this problem has been to remove a portion of a shield's peripheral coverage of the abrading part of the abrading machine, but this has inevitably caused dust to escape from the resulting open portions of the shield. 5ee, for exam~71e, US
Patents 3,673,744 and ~,~24l745.
There has been a need, therefore, for a vacuum s'hield for an abrading machine which allows the user of the abrading machine to view the surface being abraded and allows the abrading part of the machine, such as the abrasive wheel of a rotary sander to reach every part of the surface without allowing dust to escape from the shield.
In accordance with this invention, a vacuum shield is provided for an abrading part of an abrading machine comprising a generally planar top wall mounted on the abrading machine and overlying the abrading part of the abrading machine; the top wall of the shield being made of a rigid transparent material and comprising at least a first segment and a second segment; the first segment having a first hole therein, through which the abrading part can be supported and driven by the abrading mach-ine; the first segment also having a plurality of second holes therein, each second hole being connected to a vacuum hose on top of the top wall and providing pneumatic communication through the top wall between the hose and the abrading part; and the second segment being pivotally connected to the first segment for up-ward pivotal movement of the second segment about its il~,';~ p,~
connection to the first segment; and also comprising a flexible skirt depending from the peripheral edge of the tvp wall and extending substantial.Zy continuously along the entlre length of the peripheral edge of the top wall; the skirt substantially surrounding hori-~ontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly rela-tive to the first segment.
The shield of this invention can be easily attached to the abrad.ing machine and, in use, allows the surface being abraded to be easily viewed. The shield also allows the abrading part of the machine to reach every part of the surface, being abraded, while the dust generated by the abrading machine is continuou.sly removed by the vacuum hoses connected to the shield.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:-FIGURE 1 is a top plan schematic view of an abrading machine on which is provided a vacuum shield of this invention;
FIGURE 2 is a side elevation vLew of the shield and abrading machine of Figure 1. The shield is shown in section, taken along the vertical centreline of the shield; and FIGURE 3 is a bottom plan view of the abrading machine and shield of Figures1 and 2.
Shown schematically in Figures 1-3 is a conventional portable, pneumatically powered, rotary sander, gener-aliy 10. ûn the bottom of the sander 10 is a conventional generally round rotatable abrasive wheel 12. A conventional abrasive ~e.g. a sandpaper disc) can be removably (e.g. adhesively) attached to the flat bottom surface 13 of the wheel 12 so that the abrasive wil~ rotate horizontally with the wheel 12 to abrade a surface against which the bottom surface 73 of` the wheel 12 is urged. The top nf tne wheel 12 is detach-ably mounted on the bottom of a rotatable vertical shaft 14 (e.g. by means of a conventional central threaded aperture in the shaft 14 for receiving a vert-ical retaining screw on top of the wheel 12). The shaft 14 is connected to a conventional air driven rotary MCtor (not shown) in a housing 16 above the wheel 12. The motor is connected to a conventional source of compressed air (not shown) through a handle 18 on the housing 16. The motor is activated by a conventional trigger 2û connected to the housing 16 above the handle 18.
Also shown schematically in Figures 1-3 is a vacuum shield of this lnvention generally 22 which is mounted on the sander 10 so that the shield covers the top and sides of the abrasive wheel 12. The shield 22 has a generally planar top wall 24 overlying the wheel 12. The top wall 24 has the generally round configur-ation of the wheel 12 but a somewhat larger diameter than the wheel 12 so that the peripheral edge 25 of the top wall 24 lies wholly outside the circumference of the wheel 12. The shield 22 also has a generally cylindrical flexible skirt 26 that depends from the peripheral edge 25 of the top wall 24 and extends substantially continuously along the entire length of the peripheral edge 25 of the top wall 24. The skirt 26 serves as a substantially continuous barrier about the peripheral edge 25 of the top wall 24 to tne escape of dust from the shield 22 during use of the sander 10.
ln this regard, the location of the bottom 27 of the skirt 26, relative to the bottom surface 13 of the wheel 12, is not critical but it is preferred that the skirt bottom 27 be substantially parallel to the bottom surface 13 of the wheel 12. It is also pre-ferred that the skirt bottom 27 not be spaced substantially above the bottoM surface 13 of the wheel 12 so that, in use of the shield 22, the skirt bottom 27 rests on the sur-face being abraded by the abrasive bottom surface 13 of t~e wheel 12 of the sander 10.
The top wall 24 of the shield 22 is preferably made from a rigid transparent materia.l, for example, a clear plastic such as methacrylate polymer, a polystyrene or an ABS copolymer. The skirt 26 is preferably made of a flexible material which will allow substantially the entire length of the bottom 27 of the skirt to be pressed against, and conform to, the surface being abraded with the sander 10 withovt scratching the sur-face being abraded or allowing substantial amounts of`
dust to escape from the interior of the shield 22 through gaps between the surface being abraded and the skirt bottom 27. For example, the skirt 26 can be made from a bristle brush or an elastomeric member such as a soft rubber blade or a thin rubber tubing, which extends lengthwise substantially continuously along the peripheral edge 25 of` the top wall 24.
In accordance with this invention, the top wall 24 of the shield 22 comprises at least two separate segments 28 and 30, one segment 28 preferably forming the front portions of the top wall 24 and the other segment 30 formlng the remaining rear portions of the top wall 24.
In this regard, it is preferred that the front and rear segments 28 and 30 be pivotally connected to each along a line 32 that is substantially parallel to the front ~ 6 -of the shield 2Z between the front of the rear segment 30 and the rear of the front segment 28. As shown in Figures 1-3, the segments 28 and 30 of the top wall 24 are connected by means of two hinges 34 about the line 32 between the segments. As shown in Figure 2, the front segment 28 can be pivoted upwardly about the front of the rear segment 30 to allow the bottom sur-face 13 of the abrasive wheel 12 to reach a surface which would not have been accessible wlthout the front segment 2~ pivoting upwardly out of the way. Fo~
example, the front segment 28 can be pivoted upwardly when the hottom 27 of its shirt 26 has been urged atop an elevated portion of a surface being abraded or when the front of the front segment 28 has been urged against a surface perpendicular to a surface being abraded. However, when the front segment Z8 is pivoted upwardly in this way~ it is preferred that the skirt 26 continue to serve as a substantially continuous barrier about the periphery of the top wall 24, sub-2û stantially surrounding horizontally the abrasive wheel 12 to prevent the escape of dust generated within the shield. For this reason, it is preferred that the shirt 26 be made of a continuous elastomeric material to assure that little or no dust can escape from the shield 22, through gaps formed between the front and rear segments 28 and 3û, when the front segment 28 pivots upwardly about the rear segment 30. Preferably, the hinges 34 are also provided with conventional stops which limit the upward pivoting movement of the front segment 28 about the front of the rear segment 30.
As shown in Figures 2 and 3, a pair of springs 36 are preferably connected to the front and rear segments 28 and 3û of top wall 24 adjacent the hinges 34. The springs 36 urge the front segment 28 to pivot down-wardly about the front of the rear segment 3û when the front segment 2~ has pivoted upwardly (e.g. by being urged against a perpendicular surface in front of the shield 22J.
S As best shown in Figure ~, a plurality of vacuum holes 3~ are provided in the rear segment 30 oF the top wall 24 of the shield 22, spaced about the circumference of the top wall 24. Each hole 38 is connected to one end of a conventional vacuum hose 4û, and the other end of 1û each hose 40 is connected to a conventional vacuum pump inot shown). ~he vacuum holes are preferably spaced substantially equidistantly about the centre of the top wall 24 between the abrasive wheel 12 and the skirt 26 and are adapted to provide pneumatic communication between the interior of the shield 22 and the vacuum pump through the vacuum hoses 4û so that dust, gener-ated within the shield 22, can be removed by the vacuum pump.
2û As also shown in Figure 2, the rear segment 3û of the top wall 24 of the shield 22 has a central hole 42 through which the shaft 14 can extend between the motor of the sander 1û and the abrasive wheel 12 to support and drive the wheel 12. Although the size of the cent-
This invention relates to a vacuum attachment for an abrading machlne such as a portabZe rotary sander.
This invention particularly relates to a vacuum shield for enclosing, and removing dust generated by, the S abrasive wheel of a rotary sander while not interfering with the use of the sander.
Vacuum hoods or shields for tools, such as abrading machines, are well known. See, for example, US Patents 1r~ 3,673,744, 3,785,092, 3,824,745, 3,837,383, 3,935,678, 4,071,987, 4,135, 334, 4, 145,848 and 4,328,645. Typic-allyS the interiors of such shields have been connected to one or more Yacuum hoses which draw off dust gener-ated within the shields by the abrading machines.
However, such shields have hindered the vision of the users of the abrading machines enclosed by such shields and have also prevented the abrading parts of such machines from reaching surfaces adjacent to inter-2û secting walls or surfaces (e.g. in corners) which are to be abraded. This has made it difficult to use these shielded machines f'or abrading shaped and other non-flat su.rfaces to a highly smooth and uniform finish such as is required in the restoration and repair of, for example, the sheet metal panels of automobile bodies. ûne solution to this problem has been to remove a portion of a shield's peripheral coverage of the abrading part of the abrading machine, but this has inevitably caused dust to escape from the resulting open portions of the shield. 5ee, for exam~71e, US
Patents 3,673,744 and ~,~24l745.
There has been a need, therefore, for a vacuum s'hield for an abrading machine which allows the user of the abrading machine to view the surface being abraded and allows the abrading part of the machine, such as the abrasive wheel of a rotary sander to reach every part of the surface without allowing dust to escape from the shield.
In accordance with this invention, a vacuum shield is provided for an abrading part of an abrading machine comprising a generally planar top wall mounted on the abrading machine and overlying the abrading part of the abrading machine; the top wall of the shield being made of a rigid transparent material and comprising at least a first segment and a second segment; the first segment having a first hole therein, through which the abrading part can be supported and driven by the abrading mach-ine; the first segment also having a plurality of second holes therein, each second hole being connected to a vacuum hose on top of the top wall and providing pneumatic communication through the top wall between the hose and the abrading part; and the second segment being pivotally connected to the first segment for up-ward pivotal movement of the second segment about its il~,';~ p,~
connection to the first segment; and also comprising a flexible skirt depending from the peripheral edge of the tvp wall and extending substantial.Zy continuously along the entlre length of the peripheral edge of the top wall; the skirt substantially surrounding hori-~ontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly rela-tive to the first segment.
The shield of this invention can be easily attached to the abrad.ing machine and, in use, allows the surface being abraded to be easily viewed. The shield also allows the abrading part of the machine to reach every part of the surface, being abraded, while the dust generated by the abrading machine is continuou.sly removed by the vacuum hoses connected to the shield.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:-FIGURE 1 is a top plan schematic view of an abrading machine on which is provided a vacuum shield of this invention;
FIGURE 2 is a side elevation vLew of the shield and abrading machine of Figure 1. The shield is shown in section, taken along the vertical centreline of the shield; and FIGURE 3 is a bottom plan view of the abrading machine and shield of Figures1 and 2.
Shown schematically in Figures 1-3 is a conventional portable, pneumatically powered, rotary sander, gener-aliy 10. ûn the bottom of the sander 10 is a conventional generally round rotatable abrasive wheel 12. A conventional abrasive ~e.g. a sandpaper disc) can be removably (e.g. adhesively) attached to the flat bottom surface 13 of the wheel 12 so that the abrasive wil~ rotate horizontally with the wheel 12 to abrade a surface against which the bottom surface 73 of` the wheel 12 is urged. The top nf tne wheel 12 is detach-ably mounted on the bottom of a rotatable vertical shaft 14 (e.g. by means of a conventional central threaded aperture in the shaft 14 for receiving a vert-ical retaining screw on top of the wheel 12). The shaft 14 is connected to a conventional air driven rotary MCtor (not shown) in a housing 16 above the wheel 12. The motor is connected to a conventional source of compressed air (not shown) through a handle 18 on the housing 16. The motor is activated by a conventional trigger 2û connected to the housing 16 above the handle 18.
Also shown schematically in Figures 1-3 is a vacuum shield of this lnvention generally 22 which is mounted on the sander 10 so that the shield covers the top and sides of the abrasive wheel 12. The shield 22 has a generally planar top wall 24 overlying the wheel 12. The top wall 24 has the generally round configur-ation of the wheel 12 but a somewhat larger diameter than the wheel 12 so that the peripheral edge 25 of the top wall 24 lies wholly outside the circumference of the wheel 12. The shield 22 also has a generally cylindrical flexible skirt 26 that depends from the peripheral edge 25 of the top wall 24 and extends substantially continuously along the entire length of the peripheral edge 25 of the top wall 24. The skirt 26 serves as a substantially continuous barrier about the peripheral edge 25 of the top wall 24 to tne escape of dust from the shield 22 during use of the sander 10.
ln this regard, the location of the bottom 27 of the skirt 26, relative to the bottom surface 13 of the wheel 12, is not critical but it is preferred that the skirt bottom 27 be substantially parallel to the bottom surface 13 of the wheel 12. It is also pre-ferred that the skirt bottom 27 not be spaced substantially above the bottoM surface 13 of the wheel 12 so that, in use of the shield 22, the skirt bottom 27 rests on the sur-face being abraded by the abrasive bottom surface 13 of t~e wheel 12 of the sander 10.
The top wall 24 of the shield 22 is preferably made from a rigid transparent materia.l, for example, a clear plastic such as methacrylate polymer, a polystyrene or an ABS copolymer. The skirt 26 is preferably made of a flexible material which will allow substantially the entire length of the bottom 27 of the skirt to be pressed against, and conform to, the surface being abraded with the sander 10 withovt scratching the sur-face being abraded or allowing substantial amounts of`
dust to escape from the interior of the shield 22 through gaps between the surface being abraded and the skirt bottom 27. For example, the skirt 26 can be made from a bristle brush or an elastomeric member such as a soft rubber blade or a thin rubber tubing, which extends lengthwise substantially continuously along the peripheral edge 25 of` the top wall 24.
In accordance with this invention, the top wall 24 of the shield 22 comprises at least two separate segments 28 and 30, one segment 28 preferably forming the front portions of the top wall 24 and the other segment 30 formlng the remaining rear portions of the top wall 24.
In this regard, it is preferred that the front and rear segments 28 and 30 be pivotally connected to each along a line 32 that is substantially parallel to the front ~ 6 -of the shield 2Z between the front of the rear segment 30 and the rear of the front segment 28. As shown in Figures 1-3, the segments 28 and 30 of the top wall 24 are connected by means of two hinges 34 about the line 32 between the segments. As shown in Figure 2, the front segment 28 can be pivoted upwardly about the front of the rear segment 30 to allow the bottom sur-face 13 of the abrasive wheel 12 to reach a surface which would not have been accessible wlthout the front segment 2~ pivoting upwardly out of the way. Fo~
example, the front segment 28 can be pivoted upwardly when the hottom 27 of its shirt 26 has been urged atop an elevated portion of a surface being abraded or when the front of the front segment 28 has been urged against a surface perpendicular to a surface being abraded. However, when the front segment Z8 is pivoted upwardly in this way~ it is preferred that the skirt 26 continue to serve as a substantially continuous barrier about the periphery of the top wall 24, sub-2û stantially surrounding horizontally the abrasive wheel 12 to prevent the escape of dust generated within the shield. For this reason, it is preferred that the shirt 26 be made of a continuous elastomeric material to assure that little or no dust can escape from the shield 22, through gaps formed between the front and rear segments 28 and 3û, when the front segment 28 pivots upwardly about the rear segment 30. Preferably, the hinges 34 are also provided with conventional stops which limit the upward pivoting movement of the front segment 28 about the front of the rear segment 30.
As shown in Figures 2 and 3, a pair of springs 36 are preferably connected to the front and rear segments 28 and 3û of top wall 24 adjacent the hinges 34. The springs 36 urge the front segment 28 to pivot down-wardly about the front of the rear segment 3û when the front segment 2~ has pivoted upwardly (e.g. by being urged against a perpendicular surface in front of the shield 22J.
S As best shown in Figure ~, a plurality of vacuum holes 3~ are provided in the rear segment 30 oF the top wall 24 of the shield 22, spaced about the circumference of the top wall 24. Each hole 38 is connected to one end of a conventional vacuum hose 4û, and the other end of 1û each hose 40 is connected to a conventional vacuum pump inot shown). ~he vacuum holes are preferably spaced substantially equidistantly about the centre of the top wall 24 between the abrasive wheel 12 and the skirt 26 and are adapted to provide pneumatic communication between the interior of the shield 22 and the vacuum pump through the vacuum hoses 4û so that dust, gener-ated within the shield 22, can be removed by the vacuum pump.
2û As also shown in Figure 2, the rear segment 3û of the top wall 24 of the shield 22 has a central hole 42 through which the shaft 14 can extend between the motor of the sander 1û and the abrasive wheel 12 to support and drive the wheel 12. Although the size of the cent-
2~ ral hole 42 is not critical, it is preferred that the central hole 42 be substantially smaller than the wheel 12 to minimize the amount of dust which can es-cape through the central hole f`rom the shield 22. In this regard, it has been found that the pZurality of 3û vacuum holes 3~ that are provided in the top wall 24 between the wheel 12 and the skirt 26 and that are connected to the hoses 4û and a vacuum pump (not shown) can remove virtually all of the dust generated by the operation of the abrasive wheel 12 within the shield 22 and will allow little or no dust to escape from the central hole 42 so long as the central hole 42 is substantially smaller than the wheel 12.
`~ ,B
The method of mounting the shield 22 on the sander 10 also is not critical. It is preferred that the shield 22 be oounted so that it can pivot about the sander 1D
in a direction perpendicular to the line 32 between the segnlents 28 and 30 of the top wall 24 (i.e. from front to rear). In this regarc/, a conYentiona-l circ-ular clamp 44 is preferably mounted horizontally about the sander housing 16 with a pair of bosses 46 extend-ing outwardly from opposite lateral sides of the clamp 44, and a pair of upstanding arms 4~ are mounted on top of the rear segment 30 of the top wall 24 of the shield 22 on opposite lateral sides of the central hole 42.
Each boss 46 extends through a hole in the upper por-tion or each arm 48. Stops 50 are preferably provided in front and in back of each boss 46 to limit the frontward and rearward pivoting movement of the arms 48 about the pair of bosses 46 and thereby limit the pivoting movement of the shield 22 about the sander 10.
It is thought that the invention and many of its attendant advantages will be understood from the fore-going description and that it will be apparent that various modifications and changes can be made in the invention without departing from the spirit and scope thereof or sacrificing all of its material advantages, the shield 22 hereinbefore described being merely a preferred embodiment. For example, the top wall 24 of the shield 22 need not be generally round, and the skirt 26 of the shield need not be generally cylind-rical so long as the skirt 26 is completely outside ~i.e. horizontally beyond) the horizontal traYel of the abrading part 12. Also, the shield 22 can be used with a non-rotary sander 1û, such as a sander having an abrading part which moves horizontally, vertically or reciprocally relative to the housing 16 of the sander 10, so long as the shield's skirt 26 substantially sur-rounds horizontally any horizontal travel of the _ 9 _ abradiny part 12. Furthermore, terms such as "top", "hottom", "horizontal", "upwardZy", "downwardly", "front" and "rear" are used herein as relative terms to describe the shield in Figures 1 to 3 and in the claims S which follow.
`~ ,B
The method of mounting the shield 22 on the sander 10 also is not critical. It is preferred that the shield 22 be oounted so that it can pivot about the sander 1D
in a direction perpendicular to the line 32 between the segnlents 28 and 30 of the top wall 24 (i.e. from front to rear). In this regarc/, a conYentiona-l circ-ular clamp 44 is preferably mounted horizontally about the sander housing 16 with a pair of bosses 46 extend-ing outwardly from opposite lateral sides of the clamp 44, and a pair of upstanding arms 4~ are mounted on top of the rear segment 30 of the top wall 24 of the shield 22 on opposite lateral sides of the central hole 42.
Each boss 46 extends through a hole in the upper por-tion or each arm 48. Stops 50 are preferably provided in front and in back of each boss 46 to limit the frontward and rearward pivoting movement of the arms 48 about the pair of bosses 46 and thereby limit the pivoting movement of the shield 22 about the sander 10.
It is thought that the invention and many of its attendant advantages will be understood from the fore-going description and that it will be apparent that various modifications and changes can be made in the invention without departing from the spirit and scope thereof or sacrificing all of its material advantages, the shield 22 hereinbefore described being merely a preferred embodiment. For example, the top wall 24 of the shield 22 need not be generally round, and the skirt 26 of the shield need not be generally cylind-rical so long as the skirt 26 is completely outside ~i.e. horizontally beyond) the horizontal traYel of the abrading part 12. Also, the shield 22 can be used with a non-rotary sander 1û, such as a sander having an abrading part which moves horizontally, vertically or reciprocally relative to the housing 16 of the sander 10, so long as the shield's skirt 26 substantially sur-rounds horizontally any horizontal travel of the _ 9 _ abradiny part 12. Furthermore, terms such as "top", "hottom", "horizontal", "upwardZy", "downwardly", "front" and "rear" are used herein as relative terms to describe the shield in Figures 1 to 3 and in the claims S which follow.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A vacuum shield for an abrading part of an abrading machine, comprising a generally planar top wall mounted on the abrading machine; top wall of the shield being made of a rigid transparent material and comprising at least a first segment and a second segment; the first segment having a first hole therein, through which the abrading part can be supported and driven by the abrad-ing machine; the first segment also having a plurality of second holes therein, each second hole being con-nected to a vacuum hose on top of the top wall and providing pneumatic communication through the top wall between the hose and the abrading part; and the second segment being pivotally connected to the first segment for upward pivotal movement of the second segment about its connection to the first segment; and a flexible skirt depending from the peripheral edge of the top wall and extending substantially continuously along the entire length of the peripheral edge of the top wall;
the skirt being a continuous elastomeric member subs-tantially surrounding horizontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly relative to the first segment.
the skirt being a continuous elastomeric member subs-tantially surrounding horizontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly relative to the first segment.
2. The shield of claim 1, wherein the top wall has a generally circular configuration and the skirt is generally cylindrical.
3. The shield of claim 1, wherein the bottom of the skirt is substantially parallel to the bottom of the abrading part of the abrading machine.
4. The shield of claim 3, wherein the bottom of the skirt is not spaced a substantial distance above the bottom of the abrading part.
5. The shield of claim 1 wherein the skirt is a bristle brush or an elastomeric member.
6. The shield of claim 5, wherein the skirt is a continuous elastomeric member formed by a soft rubber blade or a thin rubber tubing.
7. The shield of claim 1, wherein the first and second segments of the top wall are connected along a line substantially parallel to the front of the shield.
8. The shield of claim 7, wherein the segments of the top wall are connected by a hinge provided with a stop which limits the upward pivoting movement of the second segment about the front of the first segment.
9. The shield of claim 8, wherein a spring is conn-ected to the segments of the top wall for urging the second segment to pivot downwardly about the front of the first segment.
10. The shield of claim 1, which further includes means for connecting the top wall to the abrading machine so that the top wall can pivot about the abrad-ing machine in a direction perpendicular to the pivotal connection of the segments of the top wall.
11. A vacuum shield for an abrading part of an abrad-ing machine, comprising a generally planar top wall mounted on the abrading machine; the top wall of the shield being made of a rigid transparent material and comprising a first segment having an aperture through which the abrading part can be supported and driven by the abrading machine, and a second segment pivotally connected to the first segment for upward pivotal move-ment of the second segment about its connection to the first segment; a plurality of outlets in said shield each adapted to receive a vacuum hose to provide pneu-matic communication between the hose and the abrading part; a flexible skirt depending from the peripheral edge of the top wall and extending substantially cont-inuously along the entire length of the peripheral edge of the top wall, the skirt substantially surrounding horizontally the abrading part of the abrading machine, even when the second segment is pivoted upwardly rela-tive to the first segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000523164A CA1262408A (en) | 1986-11-17 | 1986-11-17 | Sander shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000523164A CA1262408A (en) | 1986-11-17 | 1986-11-17 | Sander shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1262408A true CA1262408A (en) | 1989-10-24 |
Family
ID=4134368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000523164A Expired CA1262408A (en) | 1986-11-17 | 1986-11-17 | Sander shield |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1262408A (en) |
-
1986
- 1986-11-17 CA CA000523164A patent/CA1262408A/en not_active Expired
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