CA1255858A - Scraper adaptor for rotary buffer - Google Patents
Scraper adaptor for rotary bufferInfo
- Publication number
- CA1255858A CA1255858A CA000559563A CA559563A CA1255858A CA 1255858 A CA1255858 A CA 1255858A CA 000559563 A CA000559563 A CA 000559563A CA 559563 A CA559563 A CA 559563A CA 1255858 A CA1255858 A CA 1255858A
- Authority
- CA
- Canada
- Prior art keywords
- adaptor according
- spindle
- blade
- lower plate
- removable
- 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
- 239000000463 material Substances 0.000 abstract description 7
- 239000002184 metal Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
- B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
- B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning
- B44D3/162—Scrapers
- B44D3/164—Scrapers comprising blades
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L13/02—Scraping
- A47L13/08—Scraping with scraping blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
- B23D79/02—Machines or devices for scraping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C7/00—Paperhanging
- B44C7/02—Machines, apparatus, tools or accessories therefor
- B44C7/027—Machines, apparatus, tools or accessories for removing wall paper
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
A removable adaptor for a power-operated rotary implement, comprises a circularly vibrating lower plate. When a blade is attached to this plate, an efficient scraper is provided for removal of adhered materials, such as old under-carpets.
Past scrapers relying on longitudinal reciprocal motion have suffered from underpowering and jamming. These problems are avoided by the present invention.
A removable adaptor for a power-operated rotary implement, comprises a circularly vibrating lower plate. When a blade is attached to this plate, an efficient scraper is provided for removal of adhered materials, such as old under-carpets.
Past scrapers relying on longitudinal reciprocal motion have suffered from underpowering and jamming. These problems are avoided by the present invention.
Description
~2X~8~;~
BACKGROUND OF T~IE INVENTION
(i) Field of the inve_tion 5 This invention rela-tes to a removable adaptor for a power operated rotary implement. More partieularly, the invention relates to a scraper adaptor for a rotative buffer, for removing, for instance, old floor or wall eoverings, or other adhered material, from various surfaces.
(ii) Deseription of the Prior Art U.S. patent 2,465,192 diseloses a seraping apparatus making use of a guidable, reeiproeating blade attaehed to a 15 pneumatie hammer resting on a pushable carriage. This apparatus is designed for roofing repairs and other large seale jobs.
U.S. patent 2,526,976 discloses a power-operated hand tool 20 whieh has both rotary and reeiprocal modes of operaton depending on the task in hand. The exemplified use of the reeiproeal mode is sanding. Conversion from rotational to reeiproeal motion is aehieved by an eeeentric mounting system.
U.S. paten-t 2,736,351 and U.S. patent 3,052,950 both describe hand-held sawing or sanding tools driven by a small eleetrie motor. The motor is used to drive a deviee whieh converts rotation of the motor into reeiproeation of one or 30 more sliding plates.
U.S. patent 3,399,441 describes a high speed, recoilless chisel device containing a mechanism for converting rotation into reeiprocation of the chisel via the eccentric mounting ~2S~ B
of a shaft.
U.S. patent ~,182,000 describes a scraper at-tachment for a hand held power sander employing recip-rocal motion.
It has been discovered that the sanders of the prior art, when converted for use as scrapers, suffer from lack of power and after brief use -the blade of the scraper jams into the material being removed.
1o OBJECTS OF THE INVENTION
It is therefore desired to provide a scraper adaptor for a rotary sander, which will overcome the above problems.
It is also desired to provide, more generally, an adaptor fox a rotary implement, the adaptor comprising an element vibrating in a circular manner with respect to the .implement which may be hand held.
SUMMARY OF THE INVENTION
In meeting the above and other objects, the invention provides a removable tool-bearing adaptor for a powered rotary implement providing rotation of a shaft which forms part of said implement, said adaptor com-prising:
- an upper plate;
- securing means for securing said upper plate to said implement;
- a lower plate substantially parallel to said upper plate, said tool being borne by said lower plate;
- cam means, disposed in a central area between said plates, for converting rotation of the shaft of said implement to low amplitude circular vibration of said .
~2~i5~3~; !3 lower plate;
- a plurali-ty of flexible attachment means dis-posed substantially perpendicularly between said plates, each of said attachment means comprising:
(a) a rigid, two-ended fastening device;
(b) a two-ended flexible rubber bushing sur-rounding said device and press-fitted a-t each end -thereof into means defining holes in said pla-tes;
(c) a pair of securing means, each securing means being securable to each end of said fastening device projecting from said bushing; and (d) a pair of flexible rubber washers, each washer being disposed between said securing means and said plate and being sized to prevent passage of said securing means through said means defining holes;
whereby said plates are held fixedly apart while allowing circular vibration of said lower plate relative to said upper plate.
When used as a scraper, the present invention demonstrates greatly improved power.
BRIEF DESCRIPTION OF THE DRAWINGS
Further objects, advantages and other features of the present invention will become more apparent upon reading the following non-restrictive description of pre-ferred embodiments thereof, made with reference to the accompanying drawings, in which:
Figure 1 is an exploded view of a scraper adapt-or in perspective;
Figure 2 is a cross-sectional view of an as-sembled adaptor; and Figure 3 is a cross-sectional view taken along the line III-III in figure 2.
Figure 4 is a partially exploded view ,Jt ' ~ss~
- 3a -of a scraper adaptor in perspective wi-th a large blade.
In what follows, the same label numbers refer to all figures.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to figure 1, the upper plate (2) vf the adaptor is secured to the rotary implement (1) using any suitable securing means, such as bolts (not shown), which pass through upper plate holes (3) and through cor-responding /
/
/
.~ ~
~' ~.
~Z~S~B
implement holes (4) in the part of the ro-tatory implement (1) which receives the upper plate (2).
The lower plate (5) is held fixedly a set distance apart from the upper plate (4) by flexible attachment means.
By "flexible" is meant allowing a circular, vibrational, low amplitude displacement of the lower plate (5) with respect to the upper plate (2). This is preferably achieved, as illustrated, by using more than one individual rigid fastening device e.g. a bolt (6) each surrounded by a flexible bushing (7) press-fitted at either end into corresponding holes (10 and 13) in the upper and lower plates (2 and 5) respectively.
In the variation illustrated in Figure 2, this bushing (7) advantageously has each of its ends formed in-to a circular step with a central annular protruding portion. Thus in the assembled adaptor, the step rests against the portion of the plate (2 or 5) adjacent to the hole (10 or 13) while the protruding portion of the bushing (7) is press-fitted into the hole (10 or 13). This design allows a greater thickness of flexible material to be used which may imbue the bushing with greater durability.
As seen in Figures 1, 2 and 4, a flexible washer (8) is interposed between the fas.ening device (6) and the plate (2 or 5) to allow some play in the assembled system. The plates (2 and 5) are prevented from moving significantly up and down (i.e. towards and away from each other) by the fastening devices (6) and by a bulge in the mid-portion of each bushing (7) and/or by the abovementioned step formation at the end of each bushing. However, one plate is able to vibrate circularly, in its own plane, with respect to the ~5~i~S~
other plate, owing to the slack introduced into the adaptor by the flexible bushing (7) and by the flexible washers (8).
The ma-terial preferably used for these flexible components, is rubber.
It is preferred -that where the upper plate (2) is rectangular, or better, sguare, four fastening devices be used, each near a corner of the plate (2) as shown in the figure.
Two sets of washers are preferably used for each such tastening device so that each of the above mentioned flexible washers (8) is sandwiched between the plate (2 or 5) and a metal washer (9) before insertion of the fastening device.
When the adaptor according to the invention is to be used as a scraper, a scraper blade (11) is disposed along one edge of the lower plate (5). Normally if one edge is chosen, it would be the forward edge in relation to the orientation of the rotary implement (1). The blade (11) preferably carries a transverse cutting edge (12) at either end in order to cut any material being remo~ed, into a strip. In some cases it is desirable to have such a cutting edge (12) at one end only of the blade (11). A fuller explanation of this transverse cutting edge is given in copending Canadian patent application no. 536,347 (U.S. patent application S.N.
045,296) in the name of the present applicant.
The blade (11) is preferably detachable and may be secured by screws (14) or similar fastening device.
Figure 4 shows a varia-tion of the apparatus of Figure where the blade tll) is longer than the side of the lower plate (5) to which lt is attached. Indeed the side (22)of ~:5~
the lower plate (5) where blades (11) may be attached preferably allows for a plethora of variously si~ed bladers or other tools to be so a-ttached. Futhermore the attachment may be ajustable to allow angular posi-tioning of the blade or other tool with respect to the direction oE forward motion of the implement. In the illustrated embodiment, screws (24) secure a mounting portion (23) directly to the front side (22) of the lower pla-te (5). I'he blade (11) itself is then mounted onto the mounting portion (23) again by using screws (l~) or similar means. As before transverse cutting edges (12) may be carried at one or both ends of the blade (4).
Turning to Figure 2, the same example of flexible attachment means, as shown in figure 1, is shown in cross-section.
Thus the bolts (6) protrude from the bottom surface of the lower plate, where, as for the upper plate, flexible washers (8) and metal washers (9) are preferably used. This protrusion of the attachment means does not necessarily impede forward motion of the implement (l) with the inventive adaptor, because, when used as a scraper for instance, since such machines are generally used at an angle to the surface being scraped. If, on the contrary, it is desired to place the bottom surface of the lower plate flush onto a flat surface, then the lower plate may be suitably adapted to achieve this, so that for instance the protruding attachment means may be accomodated into an inverted well (not shown) formed in the lower plate.
The adaptor according to the invention relies on a cam means for its proper operation. This cam means is disposed between the plates (2 and 5) and converts rotational energy, provided by the rotary implement (1), into circular vibrational motion of the lower plate (5).
' , ' ~Z~;i5~3S8 The preferred cam means, shown in figure 2, comprises a first spindle (15) attachable to the shaft (not shown) of the rotary implement (1), and which passes through a hole (16) in the upper plate (2). A second spindle (17) in attached eccentrically to the lower end of the first spindle (15).
This second spindle (17) sits and rotates ln a recess (18) (see also Figure 1) in the lower plate (5). This recess (18) may be moulded to form part of the plate (5) - as shown in the figures - or may be affixed by other means (not shown). Alternatively the second spindle may be attached direetly (i.e. non-rotatably) to the lower plate (5) and instead rotate a-t its eeeentrie eonnection with the first spindle.
Thus, in either case, rotation of the first spindle (15), through its attaehment to the shaft of the rotary implement (1), eauses the eccentrically eonneeted seeond spindle (17) to move in a circular manner about the longitudinal axis of the first spindle (15). This circular movement of the second spindle (17) causes the lower plate (5) also to move cireularly with respect to the upper plate (2). Sueh motion is allowed by the flexible attaehment means (6 and 7) holding the plates (2 and 5) in an equilibrium position from whieh displaeement in any direetion is possible. The result is a eireularly vibrating lower plate (5) which has great utility, for instanee as a scraper adaptor when a blade (11) is in place.
The rotatable connection discussed above, may be achieved by any friction reducing device or simply by the sliding of metal against metal (or other material being used) but preferab,ly a ring of ball bearings (18) is provided, In the ~ss~s~
embodiment shown in the figures, this ring (18) surrounds the portion of the second spindle (17) which is positioned in the recess (18) of the lower plate (5).
In the alternative embodiment mentioned above (not shown) the ring of ball bearings (19) (or other friction reducing device) may be eccentrically attached to the lower end of the first spindle so that the ring itself is rotated eccentrically by the shaft of the rotary implement (1). By this means, the second spindle (17) both rotates around its own axis in the ring, but also is forced to rotate about an axis not its own thereby causing the lower plate (to which the second spindle is directly attached) to move in a circular manner.
In either of these embodiments, it is preferred that the antifriction device~(e.g. ball bearings) rests in a cup (20) made of flexible material, preferably rubber.
In the embodiment shown in the drawings, this cup (20) sits directly in the recess (18) in the lower plate (5).
Turning to Figure 3, it is clearly shown that the first spindle (15) is eccentric with respect to the second spindle (17) which is surrounded by ball bearings (19). The ball bearings (19) are encased on either side by casings (21) to create an annular structure (see also Figure 2).
This annular structure sits in the rubber cup (203 in turn positioned in the recess (18) of the bottom plate (5).
The degree of eccentricity of the first spindle (15) with respect to the second spindle (17) may of course be varied.
However in practice, a displacement between respective axes of about 1/32 inch has been found to be suitable. This '' " "
, .
~;B
gives an amplitude oE l/16 inch displacement of the lower plate with respect to the upper plate. Rotation speed of the first spindle may be in the range from 8,000 to 10,000 Rpm.
A suitable rotary implement for use with the adaptor according to the presen-t invention is a rotation sander such as the BOSCH 1322 (trade mark).
While there have been shown and described what are at present believed to be the preferred embodiments of the invention, it will be obvious to those skilled in -the art that various changes and modi~ications may be made to them without departing from the scope of the invention as defined by the appended claims.
~ . ~
'
BACKGROUND OF T~IE INVENTION
(i) Field of the inve_tion 5 This invention rela-tes to a removable adaptor for a power operated rotary implement. More partieularly, the invention relates to a scraper adaptor for a rotative buffer, for removing, for instance, old floor or wall eoverings, or other adhered material, from various surfaces.
(ii) Deseription of the Prior Art U.S. patent 2,465,192 diseloses a seraping apparatus making use of a guidable, reeiproeating blade attaehed to a 15 pneumatie hammer resting on a pushable carriage. This apparatus is designed for roofing repairs and other large seale jobs.
U.S. patent 2,526,976 discloses a power-operated hand tool 20 whieh has both rotary and reeiprocal modes of operaton depending on the task in hand. The exemplified use of the reeiproeal mode is sanding. Conversion from rotational to reeiproeal motion is aehieved by an eeeentric mounting system.
U.S. paten-t 2,736,351 and U.S. patent 3,052,950 both describe hand-held sawing or sanding tools driven by a small eleetrie motor. The motor is used to drive a deviee whieh converts rotation of the motor into reeiproeation of one or 30 more sliding plates.
U.S. patent 3,399,441 describes a high speed, recoilless chisel device containing a mechanism for converting rotation into reeiprocation of the chisel via the eccentric mounting ~2S~ B
of a shaft.
U.S. patent ~,182,000 describes a scraper at-tachment for a hand held power sander employing recip-rocal motion.
It has been discovered that the sanders of the prior art, when converted for use as scrapers, suffer from lack of power and after brief use -the blade of the scraper jams into the material being removed.
1o OBJECTS OF THE INVENTION
It is therefore desired to provide a scraper adaptor for a rotary sander, which will overcome the above problems.
It is also desired to provide, more generally, an adaptor fox a rotary implement, the adaptor comprising an element vibrating in a circular manner with respect to the .implement which may be hand held.
SUMMARY OF THE INVENTION
In meeting the above and other objects, the invention provides a removable tool-bearing adaptor for a powered rotary implement providing rotation of a shaft which forms part of said implement, said adaptor com-prising:
- an upper plate;
- securing means for securing said upper plate to said implement;
- a lower plate substantially parallel to said upper plate, said tool being borne by said lower plate;
- cam means, disposed in a central area between said plates, for converting rotation of the shaft of said implement to low amplitude circular vibration of said .
~2~i5~3~; !3 lower plate;
- a plurali-ty of flexible attachment means dis-posed substantially perpendicularly between said plates, each of said attachment means comprising:
(a) a rigid, two-ended fastening device;
(b) a two-ended flexible rubber bushing sur-rounding said device and press-fitted a-t each end -thereof into means defining holes in said pla-tes;
(c) a pair of securing means, each securing means being securable to each end of said fastening device projecting from said bushing; and (d) a pair of flexible rubber washers, each washer being disposed between said securing means and said plate and being sized to prevent passage of said securing means through said means defining holes;
whereby said plates are held fixedly apart while allowing circular vibration of said lower plate relative to said upper plate.
When used as a scraper, the present invention demonstrates greatly improved power.
BRIEF DESCRIPTION OF THE DRAWINGS
Further objects, advantages and other features of the present invention will become more apparent upon reading the following non-restrictive description of pre-ferred embodiments thereof, made with reference to the accompanying drawings, in which:
Figure 1 is an exploded view of a scraper adapt-or in perspective;
Figure 2 is a cross-sectional view of an as-sembled adaptor; and Figure 3 is a cross-sectional view taken along the line III-III in figure 2.
Figure 4 is a partially exploded view ,Jt ' ~ss~
- 3a -of a scraper adaptor in perspective wi-th a large blade.
In what follows, the same label numbers refer to all figures.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to figure 1, the upper plate (2) vf the adaptor is secured to the rotary implement (1) using any suitable securing means, such as bolts (not shown), which pass through upper plate holes (3) and through cor-responding /
/
/
.~ ~
~' ~.
~Z~S~B
implement holes (4) in the part of the ro-tatory implement (1) which receives the upper plate (2).
The lower plate (5) is held fixedly a set distance apart from the upper plate (4) by flexible attachment means.
By "flexible" is meant allowing a circular, vibrational, low amplitude displacement of the lower plate (5) with respect to the upper plate (2). This is preferably achieved, as illustrated, by using more than one individual rigid fastening device e.g. a bolt (6) each surrounded by a flexible bushing (7) press-fitted at either end into corresponding holes (10 and 13) in the upper and lower plates (2 and 5) respectively.
In the variation illustrated in Figure 2, this bushing (7) advantageously has each of its ends formed in-to a circular step with a central annular protruding portion. Thus in the assembled adaptor, the step rests against the portion of the plate (2 or 5) adjacent to the hole (10 or 13) while the protruding portion of the bushing (7) is press-fitted into the hole (10 or 13). This design allows a greater thickness of flexible material to be used which may imbue the bushing with greater durability.
As seen in Figures 1, 2 and 4, a flexible washer (8) is interposed between the fas.ening device (6) and the plate (2 or 5) to allow some play in the assembled system. The plates (2 and 5) are prevented from moving significantly up and down (i.e. towards and away from each other) by the fastening devices (6) and by a bulge in the mid-portion of each bushing (7) and/or by the abovementioned step formation at the end of each bushing. However, one plate is able to vibrate circularly, in its own plane, with respect to the ~5~i~S~
other plate, owing to the slack introduced into the adaptor by the flexible bushing (7) and by the flexible washers (8).
The ma-terial preferably used for these flexible components, is rubber.
It is preferred -that where the upper plate (2) is rectangular, or better, sguare, four fastening devices be used, each near a corner of the plate (2) as shown in the figure.
Two sets of washers are preferably used for each such tastening device so that each of the above mentioned flexible washers (8) is sandwiched between the plate (2 or 5) and a metal washer (9) before insertion of the fastening device.
When the adaptor according to the invention is to be used as a scraper, a scraper blade (11) is disposed along one edge of the lower plate (5). Normally if one edge is chosen, it would be the forward edge in relation to the orientation of the rotary implement (1). The blade (11) preferably carries a transverse cutting edge (12) at either end in order to cut any material being remo~ed, into a strip. In some cases it is desirable to have such a cutting edge (12) at one end only of the blade (11). A fuller explanation of this transverse cutting edge is given in copending Canadian patent application no. 536,347 (U.S. patent application S.N.
045,296) in the name of the present applicant.
The blade (11) is preferably detachable and may be secured by screws (14) or similar fastening device.
Figure 4 shows a varia-tion of the apparatus of Figure where the blade tll) is longer than the side of the lower plate (5) to which lt is attached. Indeed the side (22)of ~:5~
the lower plate (5) where blades (11) may be attached preferably allows for a plethora of variously si~ed bladers or other tools to be so a-ttached. Futhermore the attachment may be ajustable to allow angular posi-tioning of the blade or other tool with respect to the direction oE forward motion of the implement. In the illustrated embodiment, screws (24) secure a mounting portion (23) directly to the front side (22) of the lower pla-te (5). I'he blade (11) itself is then mounted onto the mounting portion (23) again by using screws (l~) or similar means. As before transverse cutting edges (12) may be carried at one or both ends of the blade (4).
Turning to Figure 2, the same example of flexible attachment means, as shown in figure 1, is shown in cross-section.
Thus the bolts (6) protrude from the bottom surface of the lower plate, where, as for the upper plate, flexible washers (8) and metal washers (9) are preferably used. This protrusion of the attachment means does not necessarily impede forward motion of the implement (l) with the inventive adaptor, because, when used as a scraper for instance, since such machines are generally used at an angle to the surface being scraped. If, on the contrary, it is desired to place the bottom surface of the lower plate flush onto a flat surface, then the lower plate may be suitably adapted to achieve this, so that for instance the protruding attachment means may be accomodated into an inverted well (not shown) formed in the lower plate.
The adaptor according to the invention relies on a cam means for its proper operation. This cam means is disposed between the plates (2 and 5) and converts rotational energy, provided by the rotary implement (1), into circular vibrational motion of the lower plate (5).
' , ' ~Z~;i5~3S8 The preferred cam means, shown in figure 2, comprises a first spindle (15) attachable to the shaft (not shown) of the rotary implement (1), and which passes through a hole (16) in the upper plate (2). A second spindle (17) in attached eccentrically to the lower end of the first spindle (15).
This second spindle (17) sits and rotates ln a recess (18) (see also Figure 1) in the lower plate (5). This recess (18) may be moulded to form part of the plate (5) - as shown in the figures - or may be affixed by other means (not shown). Alternatively the second spindle may be attached direetly (i.e. non-rotatably) to the lower plate (5) and instead rotate a-t its eeeentrie eonnection with the first spindle.
Thus, in either case, rotation of the first spindle (15), through its attaehment to the shaft of the rotary implement (1), eauses the eccentrically eonneeted seeond spindle (17) to move in a circular manner about the longitudinal axis of the first spindle (15). This circular movement of the second spindle (17) causes the lower plate (5) also to move cireularly with respect to the upper plate (2). Sueh motion is allowed by the flexible attaehment means (6 and 7) holding the plates (2 and 5) in an equilibrium position from whieh displaeement in any direetion is possible. The result is a eireularly vibrating lower plate (5) which has great utility, for instanee as a scraper adaptor when a blade (11) is in place.
The rotatable connection discussed above, may be achieved by any friction reducing device or simply by the sliding of metal against metal (or other material being used) but preferab,ly a ring of ball bearings (18) is provided, In the ~ss~s~
embodiment shown in the figures, this ring (18) surrounds the portion of the second spindle (17) which is positioned in the recess (18) of the lower plate (5).
In the alternative embodiment mentioned above (not shown) the ring of ball bearings (19) (or other friction reducing device) may be eccentrically attached to the lower end of the first spindle so that the ring itself is rotated eccentrically by the shaft of the rotary implement (1). By this means, the second spindle (17) both rotates around its own axis in the ring, but also is forced to rotate about an axis not its own thereby causing the lower plate (to which the second spindle is directly attached) to move in a circular manner.
In either of these embodiments, it is preferred that the antifriction device~(e.g. ball bearings) rests in a cup (20) made of flexible material, preferably rubber.
In the embodiment shown in the drawings, this cup (20) sits directly in the recess (18) in the lower plate (5).
Turning to Figure 3, it is clearly shown that the first spindle (15) is eccentric with respect to the second spindle (17) which is surrounded by ball bearings (19). The ball bearings (19) are encased on either side by casings (21) to create an annular structure (see also Figure 2).
This annular structure sits in the rubber cup (203 in turn positioned in the recess (18) of the bottom plate (5).
The degree of eccentricity of the first spindle (15) with respect to the second spindle (17) may of course be varied.
However in practice, a displacement between respective axes of about 1/32 inch has been found to be suitable. This '' " "
, .
~;B
gives an amplitude oE l/16 inch displacement of the lower plate with respect to the upper plate. Rotation speed of the first spindle may be in the range from 8,000 to 10,000 Rpm.
A suitable rotary implement for use with the adaptor according to the presen-t invention is a rotation sander such as the BOSCH 1322 (trade mark).
While there have been shown and described what are at present believed to be the preferred embodiments of the invention, it will be obvious to those skilled in -the art that various changes and modi~ications may be made to them without departing from the scope of the invention as defined by the appended claims.
~ . ~
'
Claims (24)
1. A removable tod-bearing adaptor for a powered rotary implement providing rotation of a shaft which forms part of said implement, said adaptor comprising:
- an upper plate;
- securing means for securing said upper plate to said implement;
- a lower plate substantially parallel to said upper plate, said tool being borne by said lower plate;
- cam means, disposed in a central area between said plates, for converting rotation of the shaft of said implement to low amplitude circular vibration of said lower plate; and - a plurality of flexible attachment means dis-posed substantially perpendicularly between said plates, each of said attachment means comprising:
(a) a rigid, two-ended fastening device;
(b) a two-ended flexible rubber bushing sur-rounding said device and press-fitted at each end thereof into means defining holes in said plates;
(c) a pair of securing means, each securing means being securable to each end of said fastening device projecting from said bushing; and (d) a pair of flexible rubber washers, each washer being disposed between said securing means and said plate and being sized to prevent passage of said securing means through said means defining holes;
whereby said plates are held fixedly apart while allowing circular vibration of said lower plate relative to said upper plate.
- an upper plate;
- securing means for securing said upper plate to said implement;
- a lower plate substantially parallel to said upper plate, said tool being borne by said lower plate;
- cam means, disposed in a central area between said plates, for converting rotation of the shaft of said implement to low amplitude circular vibration of said lower plate; and - a plurality of flexible attachment means dis-posed substantially perpendicularly between said plates, each of said attachment means comprising:
(a) a rigid, two-ended fastening device;
(b) a two-ended flexible rubber bushing sur-rounding said device and press-fitted at each end thereof into means defining holes in said plates;
(c) a pair of securing means, each securing means being securable to each end of said fastening device projecting from said bushing; and (d) a pair of flexible rubber washers, each washer being disposed between said securing means and said plate and being sized to prevent passage of said securing means through said means defining holes;
whereby said plates are held fixedly apart while allowing circular vibration of said lower plate relative to said upper plate.
2. A removable adaptor according to claim 1, wherein said cam means comprises:
- a first spindle attached at its upper end to, and rotatable about its longitudinal axis by, said shaft said spindle passing through said upper plate;
- a second spindle having an eccentric fitting adapted to fit to the lower end of said first spindle, a lower portion of said second spindle having a fitting in a recess in said lower plate, and one of said fittings being rotatable.
- a first spindle attached at its upper end to, and rotatable about its longitudinal axis by, said shaft said spindle passing through said upper plate;
- a second spindle having an eccentric fitting adapted to fit to the lower end of said first spindle, a lower portion of said second spindle having a fitting in a recess in said lower plate, and one of said fittings being rotatable.
3. A removable adaptor according to claim 2, wherein said second spindle is fixed eccentrically to the lower end of said first spindle and the lower portion of said second spindle is fitted rotatably into said re-cess.
4. A removable adaptor according to claim 3, wherein said rotatable fitting is achieved by a ring of ball bearings around the portion of said second spindle fitted into said recess.
5. A removable adaptor according to claim 4, wherein said ring of ball bearings is surrounded by a flexible cup-shaped receptacle fitted into said recess.
6. A removable adaptor according to claim 5, wherein said flexible washers, flexible bushings and said receptacle are made of rubber.
7. A removable adaptor according to claim 6, wherein said tool consists of a blade fixed on at least on edge of the lower plate.
8. A removable adaptor according to claim 7, wherein said blade has at least at one end thereof, a cutting edge extending transversely to said blade.
9. A removable adaptor according to claim 8, said blade having two cutting edges, one at each end of the blade.
10. A removable adaptor according to claim 7, 8 or 9, wherein said blade is removably attached to said lower plate.
11. A removable adaptor according to claim 2, 6 or 7, wherein said recess is formed in an up-wardly raised portion of said lower plate.
12. A removable adaptor according to claim 2, 6 or 7, comprising four such fastening devices positioned in a square configuration around said central area.
13. A removable adaptor according to claim 2, 6 or 7, wherein said upper and lower plates are substan-tially rectangular.
14. A removable adaptor according to claim 2, 6 or 7, wherein said upper and lower plates are essen-tially rectangular and said adaptor comprises four such fastening devices positioned near each corner of said plates.
15. A removable adaptor according to claim 2, 6 or 7, wherein the implement is a buffer.
16. A removable scraper adaptor for a powered rotary implement providing rotation of a shaft which forms part of said implement, said adaptor comprising:
- an upper plate;
- securing means for securing said upper plate to said implement;
- a lower plate substantially parallel to said upper plate, said lower plate having a blade on at least an edge thereof;
- cam means, disposed in a central area between said plates for converting rotation of the shaft of said implement to low amplitude circular vibration of said lower plate; said cam means comprising:
(i) a first spindle attached at its upper end to, and rotatable about its longitudinal axis by, said shaft, said spindle adapted to pass through said upper plate;
(ii) a second spindle disposed eccentrically with respect to a lower end of said first spindle, a lower portion of said second spindle being rotatably fitted into a ring of ball bearings surrounded by a flexible cup-shaped rubber receptacle fitted into a recess in said lower plate; and - a plurality of flexible attachment means dis-posed substantially perpendicularly between said plates, each of said attachment means comprising:
(a) a rigid, two-ended fastening device;
(b) a two-ended flexible rubber bushing sur-rounding said device and press-fitted at each end thereof into means defining holes in said plates;
(c) a pair of securing means, each securing means being securable to each end of said fastening device projecting from said bushing; and (d) a pair of flexible rubber washers, each washer being disposed between said securing means and said plate and being sized to prevent passage of said securing means through said means defining holes;
whereby said plates are fixedly held in spaced relation while allowing low amplitude circular vibration of said lower plate relative to said upper plate.
- an upper plate;
- securing means for securing said upper plate to said implement;
- a lower plate substantially parallel to said upper plate, said lower plate having a blade on at least an edge thereof;
- cam means, disposed in a central area between said plates for converting rotation of the shaft of said implement to low amplitude circular vibration of said lower plate; said cam means comprising:
(i) a first spindle attached at its upper end to, and rotatable about its longitudinal axis by, said shaft, said spindle adapted to pass through said upper plate;
(ii) a second spindle disposed eccentrically with respect to a lower end of said first spindle, a lower portion of said second spindle being rotatably fitted into a ring of ball bearings surrounded by a flexible cup-shaped rubber receptacle fitted into a recess in said lower plate; and - a plurality of flexible attachment means dis-posed substantially perpendicularly between said plates, each of said attachment means comprising:
(a) a rigid, two-ended fastening device;
(b) a two-ended flexible rubber bushing sur-rounding said device and press-fitted at each end thereof into means defining holes in said plates;
(c) a pair of securing means, each securing means being securable to each end of said fastening device projecting from said bushing; and (d) a pair of flexible rubber washers, each washer being disposed between said securing means and said plate and being sized to prevent passage of said securing means through said means defining holes;
whereby said plates are fixedly held in spaced relation while allowing low amplitude circular vibration of said lower plate relative to said upper plate.
17. A removable adaptor according to claim 16, comprising four said fastening devices positioned in a square configuration around said central area.
18. A removable adaptor according to claim 17, wherein said plates are substantially rectangular.
19. A removable adaptor according to claim 18, wherein said four fastening devices are positioned near each corner of said plate.
20. A removable adaptor according to claim 16, 18 or 19, wherein said recess is formed in an upwardly raised portion of said lower plate.
21. A removable adaptor according to claim 16, 18 or 19, wherein said blade has on at least one end thereof, a cutting edge extending transversely of said blade.
22. A removable adaptor according to claim 16, 18 or 19, said blade having two cutting edges extending transversely of said blade, one at each end of said blade.
23. A removable adaptor according to claim 16, 17 or 19, wherein said blade is removably attached to said lower plate.
24. A removable adaptor according to claim 16, 17 or 19, wherein said implement is a buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000559563A CA1255858A (en) | 1988-02-23 | 1988-02-23 | Scraper adaptor for rotary buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000559563A CA1255858A (en) | 1988-02-23 | 1988-02-23 | Scraper adaptor for rotary buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1255858A true CA1255858A (en) | 1989-06-20 |
Family
ID=4137501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000559563A Expired CA1255858A (en) | 1988-02-23 | 1988-02-23 | Scraper adaptor for rotary buffer |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1255858A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0416252A1 (en) * | 1989-09-02 | 1991-03-13 | MERO-Werke Dr.-Ing. Max Mengeringhausen GmbH & Co. | Machine for removing coatings from double bottom plates or the like |
-
1988
- 1988-02-23 CA CA000559563A patent/CA1255858A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0416252A1 (en) * | 1989-09-02 | 1991-03-13 | MERO-Werke Dr.-Ing. Max Mengeringhausen GmbH & Co. | Machine for removing coatings from double bottom plates or the like |
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| Date | Code | Title | Description |
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| MKEX | Expiry |