CA2124250A1 - Apparatus for excavating grooves in hardened surfaces - Google Patents
Apparatus for excavating grooves in hardened surfacesInfo
- Publication number
- CA2124250A1 CA2124250A1 CA002124250A CA2124250A CA2124250A1 CA 2124250 A1 CA2124250 A1 CA 2124250A1 CA 002124250 A CA002124250 A CA 002124250A CA 2124250 A CA2124250 A CA 2124250A CA 2124250 A1 CA2124250 A1 CA 2124250A1
- Authority
- CA
- Canada
- Prior art keywords
- excavating
- carbide tooth
- carbide
- concave
- tooth
- 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.)
- Abandoned
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
- E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
- E01C23/088—Rotary tools, e.g. milling drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
- B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
Abstract
A device for excavating a shallow groove in a hardened surface comprises a wheel rotatably mounted on an axle, having a circumferential surface extending in a circumferential direction around the wheel, at least one carbide tooth mounted on the circumferential surface for compressive excavating engagement with the hardened surface, means for supporting the at least one carbide tooth on the circumferential surface when the at least one carbide tooth is in compressive engagement with the hardened surface, the at least one carbide tooth having a concave excavating face substantially perpendicular to the circumferential direction, the concave excavating face for excavating engagement with the hardened surface.
Description
212~2i0 ,_ - APPARATUS FOR EXCAVATING
GROOVES IN HARDENED SURFACES
Field of the Invention The invention relates to an apparatus for simulating the appearance of brick and mortar in hardened pavement, and in particular, a method and apparatus for excavating shallow grooves in hardened asphalt and concrete surfaces so as to simulate a brick work pattern.
Background of the Invention Driveways, sidewalks, roadways and the like are sometimes constructed of brick so that the surface has an aesthetically pleasing appearance. Because of the prohibitive cost, attempts have been made in the prior art to simulate the appearance of brick and mortar surfaces. In particular, Applicant is aware of techniques for simulating the appearance of brick and mortar in soft pavement such as freshly rolled asphalt as those techniques are described in United States Patent No. 5,215,402 which issued on June 1, 1993 to Stowell et al for an Asphalt Imprinting Method and Apparatus. Similarly Applicant is aware of method and apparatus for imprinting aesthetically pleasing patterns into uncured concrete such as disclosed in United States Patent Nos. 3,832,079 and 3,910,711 which issued to Moorhead on August 27, 1974 and October 7, 1975, respectively.
It has been found that in order to avoid the cost of removal of existing asphalt or concrete, and the laying of fresh asphalt or concrete so as to employ the above techniques, it is often desirable to refurbish existing, that is hardened, asphalt or concrete surfaces so as to simulate the appearance of a brick and mortar surface. The prior art previously discussed is not adapted to accomplish this in that universally those teachings rely on an uncured soft working surface on which to imprint a brick-work pattern.
-Accordingly, the need has arisen for a method and apparatus for decorative grooving of hardened surfaces.
Applicant is aware of United States Patent No.
1,697,116 which issued to Hayward on January 1, 1929 for a device entitled Stone-cutting Circular Saw. Hayward teaches that it is known to construct stone-cutting circular saws with removable carborundum teeth. In particular Hayward teaches stone-cutting teeth having a "V" shape to form points projecting radially outwards and also projecting beyond the respective sides of the cutting disc so as to provide clearance for the cutting disc to pass through the stone.
Applicant is also aware of United States Patent No.
4,267,814, which issued to Benson et al on May 19, 1981 for an Abrasive Saw Blade for Trapezoidal Grooving. Benson et al disclose a tool for cutting a trapezoidal groove in the surface of highways or airport runways. The tool consists of a plurality of spaced-apart abrasive elements supported about the periphery of a circular support disc. A first set of abrasive elements have a generally rectangular cross sectional configuration and a second set of abrasive elements have a generally trapezoidal or truncated-triangular transverse cross section. As taught, the width of the rectangular abrasive elements are substantially smaller that the width of the trapezoidal or truncated-triangular abrasive elements so that only the outer edges of the rectangular abrasive elements serve as working surfaces. The rectangular abrasive elements, it is taught, protect the trapezoidal or truncated-triangular elements from excessive wear. Thus as disclosed the trapezoidal or truncated-triangular abrasive elements may be used to cut trapezoidal water drainage grooves in relatively pliable or deformable material such as asphalt.
Benson et al disclose that the peripheral abrasive elements on the cutting blades normally are made of a diamond abrasive material consisting of diamond particles distributed in a metal base matrix. Because, as taught by Benson et al, diamond ~2 ~2~
- abrasive blades are quite expensive, the object of the Benson etal device was to extend the life of such diamond abrasive blades.
Thus it is an object of the present invention to provide a groove excavating blade for the inexpensive excavation of grooves in hardened asphalt or concrete surfaces. It is a further object to provide a groove excavating blade having replaceable carbide teeth, the carbide teeth having concave excavating surfaces shaped to minimize the severity of the chine formed along the edges of the groove being excavated.
Apart from the expense of using diamond abrasive blades as noted by Benson et al, Applicant also notes that such blades typically are of relatively large diameter having for example of 10 inch or 14 inch diameter cutting wheels. In the application to which the present invention is adapted, namely, excavating shallow grooves into a grid pattern so as to simulate mortar between bricks, large diameter cutting wheels make a tidy edge finish difficult and expensive to obtain in that the edge finish often must be repaired due to over-cutting when connecting cross-grooves in the grid. It is also an object of the invention to provide the carbide teeth aforesaid on relatively small diameter cutting wheels and to provide a tooth-mounting assembly which allows for easy exchange of carbide teeth.
Summary of the Invention Applicant has found that, because of the large compressive strength of carbide, if rigidly mounted to the periphery of a relatively small diameter cutting wheel, carbide teeth can be used wheretofore diamond cutting blades were generally used, namely, in the cutting of hardened surfaces such as hardened asphalt or concrete. It was noted that, in particu-lar, for use on hardened concrete that carbide teeth well withstood being driven into the hardened concrete to thereby excavate a groove in the concrete. Excavation, it was noted, was by pulverizing the concrete engaged by the carbide teeth as ~ ~ 2 ii ,~ r j O
opposed to cutting the hardened concrete accomplished by diamond cutting wheels.
It was also found for excavating grooves in hardened asphalt surfaces that use of a concave excavating face on the carbide teeth scooped the material being excavated from the groove rather than pushing or displacing the material sideways from the groove onto the edges of the groove, thereby avoiding an unsightly finish. Further, it avoided the fact that material so pushed up onto the edges of the groove readily crumbled so as to leave a rough finish line along the edge of the groove.
Similar crumbling of the edge of the groove has been found to result from excavating a groove having a rectangular or close to rectangular trapezoidal cross section so that a severe chine is formed along the edges of the groove.
Thus in the present invention, a relatively small diameter supporting wheel is provided for removable mounting thereon of carbide teeth in radially spaced relation around the periphery of the wheel, the carbide teeth having concave excavating faces and shaped in cross section to minimize the severity of the chine formed along the sides of a groove excavated in a hardened surface by the rotational engagement with the hardened surface of the carbide teeth mounted on the supporting wheel.
Brief Description of the Drawings Figure 1 is a fragmentary side elevation view of the groove excavating wheel of the present invention excavating the groove.
Figure 2 is a perspective view of a carbide tooth for mounting on the groove excavating wheel of Figure 1.
Figure 3 is, in fragmentary plan view, a gridwork of grooves cut into a hardened surface by the groove excavating ~2fl2~a -- wheel of Figure 1 so as to simulate the appearance of a brick and mortar surface.
Figure 4 is an alternative embodiment to the groove excavating wheel of Figure 1.
Figure 5 is a side elevation view of a groove cutting device incorporating the present invention.
Detailed Description of Preferred Embodiments As illustrated in Figure 1, groove excavating wheel 10 may be rotated in direction A on axle 12 so as to bring excavat-ing faces 14 on carbide teeth 16 (as better seen in Figure 2) into excavating engagement with hardened asphalt or concrete 18.
Axle 12 and wheel 10 are driven by conventional drive means known in the art.
Shallow groove 20a may be excavated by translating wheel 10 in direction B simultaneously with rotating wheel 10 in direction A. Rotating of wheel 10 in direction A is advantageously at high speed, for example 3000 revolutions per minute. Translation in direction B when excavating grooves 20a or 2Ob may be at a slow walking speed.
Shallow groove 20a is perpendicular to shallow groove 2Ob. In Figure 1 shallow groove 2Oa is shown being connected with shallow groove 2Ob within the brick-work pattern of simulated bricks 22 and shallow grooves 20a and 20b illustrated in Figure 3.
Shallow grooves 20a and 20b are excavated with sloping sides 24.
The shape of sloping sides 24, that is, the cross sectional shape of grooves 20a and 20b, correspond to the cross sectional shape and slope of side surfaces 26 on carbide teeth 16. Although as illustrated in Figure 2 carbide tooth 16 has flat side surfaces 26 and a truncated top surface 28 which results in grooves 20a 2 ~2I1~J~O
-and 20b having, in cross section, an inverted truncated triangu-lar shape, it is understood that other cross sectional shapes of carbide teeth 16 may be employed such as concave, inverted triangular, or trapezoidal. The criterion for an appropriate cross sectional shape for carbine teeth 16 is that the resulting chines 30 forming the upper edges of grooves 20a and 20b should be blunt, that is, not severe in the manner of a chine formed by a rectangular groove.
As illustrated in Figure 3, groove 2Ob may be an edge groove running along the edge of the simulated brick work pattern. It has been found useful when connecting cross grooves such as grooves 20a to an edge groove such as groove 20b, to keep the diameter of wheel 10 relative small in order to properly connect cross groove 2Oa with edge groove 2Ob without over-cutting past edge groove 2Ob into the portion of hardened asphalt or concrete surface 18 which it is desired to leave intact. It has been found that large diameter wheels such as 10 inch or 14 inch diameter wheels conventionally used for diamond cutting blades, if used to cut shallow grooves to simulate a brick work pattern, over-cut past the outermost edge of edge groove 20b thereby necessitating back-filling and repair of the outermost edge of edge groove 20b. Thus, for example, a 4 1/2 inch diameter wheel 10 having, for example, mounted thereon ten evenly radially spaced carbide teeth 16 around the periphery may be used to cut shallow cross grooves 2Oa while keeping damage to the outermost edge of edge groove 2Ob to a minimum.
As illustrated in Figure 1, carbide teeth 16 may be mounted directly onto the periphery of wheel 10 by welding-like technique so as to snugly abut carbide teeth 16 against support-ing buttresses 32 rigidly mounted to or extending from the periphery of wheel 10. Because of the large compression forces exerted on carbide teeth 16 when excavating shallow grooves 2Oa or 20b from hardened asphalt or concrete surface 18, buttress 32 must rigidly support carbide teeth 16 to prevent premature damage 212~25 0 to carbide teeth 16. Carbide teeth 16 must also be rigidly mounted or held flush against the periphery of wheel 10.
As illustrated in Figure 4, which illustrates an alternative embodiment for rigidly mounting carbide teeth 16 onto the periphery of wheel 10, annular ring 34 is provided for snug fitment around wheel 10. Annular ring 34 is secured to the periphery of wheel 10 by countersunk screws 36 (shown in broken outline) or the like. Annular ring 34 has rigidly spaced apart cutouts formed so as to snugly receive and hold therein carbide teeth 16. Buttresses 32 may be formed as part of, and extending from, annular ring 34. Buttresses 32 may, alternatively, be formed integral with annular ring 34.
Typically shallow grooves 20a and 20b may be approxi-mately 1/16 inch in maximum depth and approximately 3/8 inch in width.
A groove cutting device 37 incorporating the present invention may be as depicted in Figure 5. Mounting frame 38 supports wheel 10, hydraulic motor 40, contact switch 42, hydraulic fluid supply 44, and weight bearing trolley wheel 46.
Trolley wheel 46 supports the weight of hydraulic fluid supply 44 and allows for an operator to easily push groove cutting device 37, for example by handle 48, so as to translate wheel 10 in direction B. Hydraulic fluid supply 44 supplies pressurized hydraulic fluid via transmission lines (not shown) to hydraulic motor 40 so as to drive wheel 10. Guide rod 50 is journalled in bearing sleeves 52, bearing sleeves 52 having bearings 54 lining the interior sleeve surface of bearing sleeves 52 so that guide rod 50, snugly journalled against bearings 54, is easily longitudinally translated within bearing sleeves 52. Guide rod 50 may thus be used to guide groove cutting device 37 in a straight line for excavating a straight groove, guide rod 50 being suitably supported at either end (supports not shown).
2 ~ 2 ~ ~
-As opposed to the brick-work pattern set out in Figure 3, if alternating rows of brick-work are offset laterally by, for example, one half the length of one of the facsimile bricks 22, then it has been found useful to incorporate contact switch 42 into groove cutting device 37. As wheel 10 is translated in direction A, contact wheel 56 contacts the edge of an offset facsimile brick 22. Contact wheel 56 rides up onto brick 22 driving push rod 58 so as to toggle contact switch 42 and switch relay 60. When switch relay 60 is toggled, a hydraulic actuator (not shown), connected via transmission lines (also not shown), raises wheel 10 above the upper surface of offset brick 22. Once wheel 10 is pushed in direction B past offset brick 22, contact wheel 56 re-extends on push rod 58 again toggling contact switch 42 and switch relay 60 so as to lower wheel 10 to continue excavating a groove. Of course, contact wheel 56 follows in a previously excavated parallel groove to the groove being excavated by wheel 10.
As is well known in the art, once shallow grooves 2Oa and 20b have been excavated to form a grid brick-work pattern, colouring solutions may be applied to colour the surfaces of simulated bricks 22. Typical suppliers of such solutions are Concrete Solutions of San Diego, California, and Integrated Paving Concepts of Vancouver, British Columbia, Canada.
As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifica-tions are possible in the practice of this invention without departing from the spirit or scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
GROOVES IN HARDENED SURFACES
Field of the Invention The invention relates to an apparatus for simulating the appearance of brick and mortar in hardened pavement, and in particular, a method and apparatus for excavating shallow grooves in hardened asphalt and concrete surfaces so as to simulate a brick work pattern.
Background of the Invention Driveways, sidewalks, roadways and the like are sometimes constructed of brick so that the surface has an aesthetically pleasing appearance. Because of the prohibitive cost, attempts have been made in the prior art to simulate the appearance of brick and mortar surfaces. In particular, Applicant is aware of techniques for simulating the appearance of brick and mortar in soft pavement such as freshly rolled asphalt as those techniques are described in United States Patent No. 5,215,402 which issued on June 1, 1993 to Stowell et al for an Asphalt Imprinting Method and Apparatus. Similarly Applicant is aware of method and apparatus for imprinting aesthetically pleasing patterns into uncured concrete such as disclosed in United States Patent Nos. 3,832,079 and 3,910,711 which issued to Moorhead on August 27, 1974 and October 7, 1975, respectively.
It has been found that in order to avoid the cost of removal of existing asphalt or concrete, and the laying of fresh asphalt or concrete so as to employ the above techniques, it is often desirable to refurbish existing, that is hardened, asphalt or concrete surfaces so as to simulate the appearance of a brick and mortar surface. The prior art previously discussed is not adapted to accomplish this in that universally those teachings rely on an uncured soft working surface on which to imprint a brick-work pattern.
-Accordingly, the need has arisen for a method and apparatus for decorative grooving of hardened surfaces.
Applicant is aware of United States Patent No.
1,697,116 which issued to Hayward on January 1, 1929 for a device entitled Stone-cutting Circular Saw. Hayward teaches that it is known to construct stone-cutting circular saws with removable carborundum teeth. In particular Hayward teaches stone-cutting teeth having a "V" shape to form points projecting radially outwards and also projecting beyond the respective sides of the cutting disc so as to provide clearance for the cutting disc to pass through the stone.
Applicant is also aware of United States Patent No.
4,267,814, which issued to Benson et al on May 19, 1981 for an Abrasive Saw Blade for Trapezoidal Grooving. Benson et al disclose a tool for cutting a trapezoidal groove in the surface of highways or airport runways. The tool consists of a plurality of spaced-apart abrasive elements supported about the periphery of a circular support disc. A first set of abrasive elements have a generally rectangular cross sectional configuration and a second set of abrasive elements have a generally trapezoidal or truncated-triangular transverse cross section. As taught, the width of the rectangular abrasive elements are substantially smaller that the width of the trapezoidal or truncated-triangular abrasive elements so that only the outer edges of the rectangular abrasive elements serve as working surfaces. The rectangular abrasive elements, it is taught, protect the trapezoidal or truncated-triangular elements from excessive wear. Thus as disclosed the trapezoidal or truncated-triangular abrasive elements may be used to cut trapezoidal water drainage grooves in relatively pliable or deformable material such as asphalt.
Benson et al disclose that the peripheral abrasive elements on the cutting blades normally are made of a diamond abrasive material consisting of diamond particles distributed in a metal base matrix. Because, as taught by Benson et al, diamond ~2 ~2~
- abrasive blades are quite expensive, the object of the Benson etal device was to extend the life of such diamond abrasive blades.
Thus it is an object of the present invention to provide a groove excavating blade for the inexpensive excavation of grooves in hardened asphalt or concrete surfaces. It is a further object to provide a groove excavating blade having replaceable carbide teeth, the carbide teeth having concave excavating surfaces shaped to minimize the severity of the chine formed along the edges of the groove being excavated.
Apart from the expense of using diamond abrasive blades as noted by Benson et al, Applicant also notes that such blades typically are of relatively large diameter having for example of 10 inch or 14 inch diameter cutting wheels. In the application to which the present invention is adapted, namely, excavating shallow grooves into a grid pattern so as to simulate mortar between bricks, large diameter cutting wheels make a tidy edge finish difficult and expensive to obtain in that the edge finish often must be repaired due to over-cutting when connecting cross-grooves in the grid. It is also an object of the invention to provide the carbide teeth aforesaid on relatively small diameter cutting wheels and to provide a tooth-mounting assembly which allows for easy exchange of carbide teeth.
Summary of the Invention Applicant has found that, because of the large compressive strength of carbide, if rigidly mounted to the periphery of a relatively small diameter cutting wheel, carbide teeth can be used wheretofore diamond cutting blades were generally used, namely, in the cutting of hardened surfaces such as hardened asphalt or concrete. It was noted that, in particu-lar, for use on hardened concrete that carbide teeth well withstood being driven into the hardened concrete to thereby excavate a groove in the concrete. Excavation, it was noted, was by pulverizing the concrete engaged by the carbide teeth as ~ ~ 2 ii ,~ r j O
opposed to cutting the hardened concrete accomplished by diamond cutting wheels.
It was also found for excavating grooves in hardened asphalt surfaces that use of a concave excavating face on the carbide teeth scooped the material being excavated from the groove rather than pushing or displacing the material sideways from the groove onto the edges of the groove, thereby avoiding an unsightly finish. Further, it avoided the fact that material so pushed up onto the edges of the groove readily crumbled so as to leave a rough finish line along the edge of the groove.
Similar crumbling of the edge of the groove has been found to result from excavating a groove having a rectangular or close to rectangular trapezoidal cross section so that a severe chine is formed along the edges of the groove.
Thus in the present invention, a relatively small diameter supporting wheel is provided for removable mounting thereon of carbide teeth in radially spaced relation around the periphery of the wheel, the carbide teeth having concave excavating faces and shaped in cross section to minimize the severity of the chine formed along the sides of a groove excavated in a hardened surface by the rotational engagement with the hardened surface of the carbide teeth mounted on the supporting wheel.
Brief Description of the Drawings Figure 1 is a fragmentary side elevation view of the groove excavating wheel of the present invention excavating the groove.
Figure 2 is a perspective view of a carbide tooth for mounting on the groove excavating wheel of Figure 1.
Figure 3 is, in fragmentary plan view, a gridwork of grooves cut into a hardened surface by the groove excavating ~2fl2~a -- wheel of Figure 1 so as to simulate the appearance of a brick and mortar surface.
Figure 4 is an alternative embodiment to the groove excavating wheel of Figure 1.
Figure 5 is a side elevation view of a groove cutting device incorporating the present invention.
Detailed Description of Preferred Embodiments As illustrated in Figure 1, groove excavating wheel 10 may be rotated in direction A on axle 12 so as to bring excavat-ing faces 14 on carbide teeth 16 (as better seen in Figure 2) into excavating engagement with hardened asphalt or concrete 18.
Axle 12 and wheel 10 are driven by conventional drive means known in the art.
Shallow groove 20a may be excavated by translating wheel 10 in direction B simultaneously with rotating wheel 10 in direction A. Rotating of wheel 10 in direction A is advantageously at high speed, for example 3000 revolutions per minute. Translation in direction B when excavating grooves 20a or 2Ob may be at a slow walking speed.
Shallow groove 20a is perpendicular to shallow groove 2Ob. In Figure 1 shallow groove 2Oa is shown being connected with shallow groove 2Ob within the brick-work pattern of simulated bricks 22 and shallow grooves 20a and 20b illustrated in Figure 3.
Shallow grooves 20a and 20b are excavated with sloping sides 24.
The shape of sloping sides 24, that is, the cross sectional shape of grooves 20a and 20b, correspond to the cross sectional shape and slope of side surfaces 26 on carbide teeth 16. Although as illustrated in Figure 2 carbide tooth 16 has flat side surfaces 26 and a truncated top surface 28 which results in grooves 20a 2 ~2I1~J~O
-and 20b having, in cross section, an inverted truncated triangu-lar shape, it is understood that other cross sectional shapes of carbide teeth 16 may be employed such as concave, inverted triangular, or trapezoidal. The criterion for an appropriate cross sectional shape for carbine teeth 16 is that the resulting chines 30 forming the upper edges of grooves 20a and 20b should be blunt, that is, not severe in the manner of a chine formed by a rectangular groove.
As illustrated in Figure 3, groove 2Ob may be an edge groove running along the edge of the simulated brick work pattern. It has been found useful when connecting cross grooves such as grooves 20a to an edge groove such as groove 20b, to keep the diameter of wheel 10 relative small in order to properly connect cross groove 2Oa with edge groove 2Ob without over-cutting past edge groove 2Ob into the portion of hardened asphalt or concrete surface 18 which it is desired to leave intact. It has been found that large diameter wheels such as 10 inch or 14 inch diameter wheels conventionally used for diamond cutting blades, if used to cut shallow grooves to simulate a brick work pattern, over-cut past the outermost edge of edge groove 20b thereby necessitating back-filling and repair of the outermost edge of edge groove 20b. Thus, for example, a 4 1/2 inch diameter wheel 10 having, for example, mounted thereon ten evenly radially spaced carbide teeth 16 around the periphery may be used to cut shallow cross grooves 2Oa while keeping damage to the outermost edge of edge groove 2Ob to a minimum.
As illustrated in Figure 1, carbide teeth 16 may be mounted directly onto the periphery of wheel 10 by welding-like technique so as to snugly abut carbide teeth 16 against support-ing buttresses 32 rigidly mounted to or extending from the periphery of wheel 10. Because of the large compression forces exerted on carbide teeth 16 when excavating shallow grooves 2Oa or 20b from hardened asphalt or concrete surface 18, buttress 32 must rigidly support carbide teeth 16 to prevent premature damage 212~25 0 to carbide teeth 16. Carbide teeth 16 must also be rigidly mounted or held flush against the periphery of wheel 10.
As illustrated in Figure 4, which illustrates an alternative embodiment for rigidly mounting carbide teeth 16 onto the periphery of wheel 10, annular ring 34 is provided for snug fitment around wheel 10. Annular ring 34 is secured to the periphery of wheel 10 by countersunk screws 36 (shown in broken outline) or the like. Annular ring 34 has rigidly spaced apart cutouts formed so as to snugly receive and hold therein carbide teeth 16. Buttresses 32 may be formed as part of, and extending from, annular ring 34. Buttresses 32 may, alternatively, be formed integral with annular ring 34.
Typically shallow grooves 20a and 20b may be approxi-mately 1/16 inch in maximum depth and approximately 3/8 inch in width.
A groove cutting device 37 incorporating the present invention may be as depicted in Figure 5. Mounting frame 38 supports wheel 10, hydraulic motor 40, contact switch 42, hydraulic fluid supply 44, and weight bearing trolley wheel 46.
Trolley wheel 46 supports the weight of hydraulic fluid supply 44 and allows for an operator to easily push groove cutting device 37, for example by handle 48, so as to translate wheel 10 in direction B. Hydraulic fluid supply 44 supplies pressurized hydraulic fluid via transmission lines (not shown) to hydraulic motor 40 so as to drive wheel 10. Guide rod 50 is journalled in bearing sleeves 52, bearing sleeves 52 having bearings 54 lining the interior sleeve surface of bearing sleeves 52 so that guide rod 50, snugly journalled against bearings 54, is easily longitudinally translated within bearing sleeves 52. Guide rod 50 may thus be used to guide groove cutting device 37 in a straight line for excavating a straight groove, guide rod 50 being suitably supported at either end (supports not shown).
2 ~ 2 ~ ~
-As opposed to the brick-work pattern set out in Figure 3, if alternating rows of brick-work are offset laterally by, for example, one half the length of one of the facsimile bricks 22, then it has been found useful to incorporate contact switch 42 into groove cutting device 37. As wheel 10 is translated in direction A, contact wheel 56 contacts the edge of an offset facsimile brick 22. Contact wheel 56 rides up onto brick 22 driving push rod 58 so as to toggle contact switch 42 and switch relay 60. When switch relay 60 is toggled, a hydraulic actuator (not shown), connected via transmission lines (also not shown), raises wheel 10 above the upper surface of offset brick 22. Once wheel 10 is pushed in direction B past offset brick 22, contact wheel 56 re-extends on push rod 58 again toggling contact switch 42 and switch relay 60 so as to lower wheel 10 to continue excavating a groove. Of course, contact wheel 56 follows in a previously excavated parallel groove to the groove being excavated by wheel 10.
As is well known in the art, once shallow grooves 2Oa and 20b have been excavated to form a grid brick-work pattern, colouring solutions may be applied to colour the surfaces of simulated bricks 22. Typical suppliers of such solutions are Concrete Solutions of San Diego, California, and Integrated Paving Concepts of Vancouver, British Columbia, Canada.
As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifica-tions are possible in the practice of this invention without departing from the spirit or scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
Claims (15)
1. A device for excavating a shallow groove in a hardened surface comprises:
a wheel rotatably mounted on an axle, said wheel having a circumferential surface extending in a circumferential direction around said wheel, at least one carbide tooth mounted on said circumfer-ential surface for compressive excavating engagement with said hardened surface, means for supporting said at least one carbide tooth on said circumferential surface when said at least one carbide tooth is in compressive engagement with said hardened surface, said at least one carbide tooth having a concave excavating face substantially perpendicular to said circumferential direction, said concave excavating face for excavating engagement with said hardened surface.
a wheel rotatably mounted on an axle, said wheel having a circumferential surface extending in a circumferential direction around said wheel, at least one carbide tooth mounted on said circumfer-ential surface for compressive excavating engagement with said hardened surface, means for supporting said at least one carbide tooth on said circumferential surface when said at least one carbide tooth is in compressive engagement with said hardened surface, said at least one carbide tooth having a concave excavating face substantially perpendicular to said circumferential direction, said concave excavating face for excavating engagement with said hardened surface.
2. The device of claim 1 wherein said at least one carbide tooth has a substantially truncated-triangular shape in a cross-sectional direction substantially parallel to said concave excavating face.
3. The device of claim 1 wherein said at least one carbide tooth has a substantially trapezoidal shape in a cross-sectional direction substantially parallel to said concave excavating face.
4. The device of claim 1 wherein said at least one carbide tooth has a substantially convex shape in a cross-sectional direction substantially parallel to said concave excavating face.
5. The device of claim 1 wherein said at least one carbide tooth has a substantially triangular shape in a cross-sectional direction substantially parallel to said concave excavating face.
6. The device of claim 1 wherein said at least one carbide tooth is releasably mountable on said circum-ferential surface.
7. A device for excavating a shallow groove in a hardened surface comprises a carbide tooth having a concave excavating face for compressive excavating engagement with said hardened surface.
8. The device of claim 7 wherein said carbide tooth has a substantially truncated-triangular shape in a cross-sectional direction substantially parallel to said concave excavating face.
9. The device of claim 7 wherein said carbide tooth has a substantially trapezoidal shape in a cross-sectional direction substantially parallel to said concave excavating face.
10. The device of claim 7 wherein said carbide tooth has a substantially convex shape in a cross-sectional direction substantially parallel to said concave excavating face.
11. The device of claim 7 wherein said carbide tooth has a substantially triangular shape in a cross-sectional direction substantially parallel to said concave excavating face.
12. The device of claim 7 wherein said carbide tooth is releasably mountable on a circumferential surface of a wheel.
13. The device of claim 6 further comprising an annular ring for snug circumferential releasable mounting on said circumferential surface, said annular ring having at least one cut-out therein, corresponding to said at least one carbide tooth, for snug mating fitment of said at least one carbide tooth therethrough whereby said at least one carbide tooth may be releasably rigidly mounted onto said circumferential surface.
14. The device of claim 1 wherein said at least one carbide tooth comprises a radially spaced apart array of carbide teeth.
15. The device of claim 13 wherein said at least one carbide tooth comprises a radially spaced apart array of carbide teeth and said at least one cut-out com-prises a corresponding radially spaced apart array of cut-outs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002124250A CA2124250A1 (en) | 1994-05-25 | 1994-05-25 | Apparatus for excavating grooves in hardened surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002124250A CA2124250A1 (en) | 1994-05-25 | 1994-05-25 | Apparatus for excavating grooves in hardened surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2124250A1 true CA2124250A1 (en) | 1995-11-26 |
Family
ID=4153668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002124250A Abandoned CA2124250A1 (en) | 1994-05-25 | 1994-05-25 | Apparatus for excavating grooves in hardened surfaces |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2124250A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316113A (en) * | 2018-01-30 | 2018-07-24 | 刘强 | A kind of energy-saving road graticule removal device |
| US10933424B1 (en) | 2019-12-11 | 2021-03-02 | Pearson Incorporated | Grinding roll improvements |
| US11384489B2 (en) * | 2019-06-17 | 2022-07-12 | Ariel Gerardo Martinez | Scarifier system, and method of resurfacing or remodeling a ground surface using the scarifier system |
| US11534770B1 (en) | 2017-07-26 | 2022-12-27 | Pearson Incorporated | Systems and methods for step grinding |
| US11751507B1 (en) | 2019-10-31 | 2023-09-12 | Hemp Processing Solutions, LLC | Crop harvesting system with plant stripping apparatus |
-
1994
- 1994-05-25 CA CA002124250A patent/CA2124250A1/en not_active Abandoned
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11534770B1 (en) | 2017-07-26 | 2022-12-27 | Pearson Incorporated | Systems and methods for step grinding |
| CN108316113A (en) * | 2018-01-30 | 2018-07-24 | 刘强 | A kind of energy-saving road graticule removal device |
| US11384489B2 (en) * | 2019-06-17 | 2022-07-12 | Ariel Gerardo Martinez | Scarifier system, and method of resurfacing or remodeling a ground surface using the scarifier system |
| US11751507B1 (en) | 2019-10-31 | 2023-09-12 | Hemp Processing Solutions, LLC | Crop harvesting system with plant stripping apparatus |
| US10933424B1 (en) | 2019-12-11 | 2021-03-02 | Pearson Incorporated | Grinding roll improvements |
| US11077445B2 (en) | 2019-12-11 | 2021-08-03 | Pearson Incorporated | Grinding roll improvements |
| US11826762B1 (en) | 2019-12-11 | 2023-11-28 | Pearson Incorporated | Grinding roll improvements |
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| Date | Code | Title | Description |
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