US20050127741A1 - Grinder vehicle for removing traffic markings - Google Patents
Grinder vehicle for removing traffic markings Download PDFInfo
- Publication number
- US20050127741A1 US20050127741A1 US10/735,493 US73549303A US2005127741A1 US 20050127741 A1 US20050127741 A1 US 20050127741A1 US 73549303 A US73549303 A US 73549303A US 2005127741 A1 US2005127741 A1 US 2005127741A1
- Authority
- US
- United States
- Prior art keywords
- grinder
- drive unit
- roadway surface
- head assembly
- vehicle
- 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
Images
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
- E01C23/0885—Rotary tools, e.g. milling drums with vertical or steeply inclined rotary axis
-
- 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
- E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
- E01C2301/50—Methods or devices for preventing dust by spraying or sucking
Definitions
- This invention relates to a grinder vehicle for removing traffic markings from an underlying roadway surface, and more particularly, to such a grinder vehicle having a self propelled drive unit with an engine that drives both the drive unit and a grinder head assembly.
- Roadways are often constructed from concrete or asphalt materials. Traffic markings, such as painted markings, painted lines, epoxy markings, thermoplastic lines, and tape lines, among other markings, are often applied to roadway surfaces to direct traffic. Occasionally, it becomes necessary to remove traffic markings from roadway surfaces.
- Some traffic line removal units have a grinder that is connected to a separate, independently driven self-propelled drive unit.
- the self-propelled drive unit facilitates movement of the grinder, the motor in the grinder remains relatively small, causing the traffic marking removal rate of the traffic line removal unit to remain undesirably slow. Accordingly a need exists for an improved grinder for traffic lines from an underlying roadway surface.
- the present invention is a grinder vehicle for removing traffic markings from an underlying roadway surface.
- the grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels.
- a drive shaft is connected to the drive unit engine.
- a grinder head assembly is connected to the frame assembly of the drive unit and is driven by the drive shaft of the drive unit engine.
- the grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface.
- the present invention is a grinder vehicle for removing traffic markings from an underlying roadway surface.
- the grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels.
- a drive shaft is connected to the drive unit engine.
- a grinder head assembly is connected to the frame assembly of the drive unit and includes a main shaft that is driven by the drive shaft of the drive unit engine.
- a plurality of grinder heads for removing the traffic markings from the underlying roadway surface is mounted to and rotatable by the main shaft of the grinder head assembly.
- a downward pressure adjuster is connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
- the present invention is a grinder vehicle for removing traffic markings from an underlying roadway surface.
- the grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels.
- a drive shaft is connected to the drive unit engine.
- a grinder head assembly is connected to the frame assembly of the drive unit and includes a main shaft that is driven by the drive shaft of the drive unit engine.
- a plurality of grinder heads for removing the traffic markings from the underlying roadway surface is mounted to and rotatable by the main shaft of the grinder head assembly.
- a hydraulic cylinder is connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
- a pivot adjuster is connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
- the present invention is a grinder for removing traffic markings from an underlying roadway surface that includes a grinder head assembly and a downward pressure adjuster.
- the grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface.
- the downward pressure adjuster is connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
- the present invention is a grinder for removing traffic markings from an underlying roadway surface that includes a grinder head assembly and a pivot adjuster.
- the grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface.
- the pivot adjuster is connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
- FIG. 1 is a schematic perspective view of a grinder for removing traffic markings according to one embodiment of the invention having a drive unit and a grinder head assembly.
- FIG. 2 is a schematic representation of a drive unit engine that drives both the drive unit and the grinder head assembly of the grinder for removing traffic markings of FIG. 1 ;
- FIG. 3 is a cutaway view of a frame assembly that houses the grinder head assembly of FIG. 1 ;
- FIG. 4 is a back view of the frame assembly of FIG. 3 ;
- FIG. 5 is a bottom view of the frame assembly of FIG. 3 ;
- FIG. 6 is an exploded view of a grinder head assembly for use in the grinder for removing traffic markings according to one embodiment of the invention
- FIG. 7 is schematic side view of a gear box showing the mating of a drive shaft of the drive unit and a pulley shaft that is connected to the grinder head assembly;
- FIG. 8 is a front view of the frame assembly of FIG. 3 showing a pivot adjuster attached thereto for pivotally adjusting the frame assembly;
- FIG. 9 is a side view of the frame assembly of FIG. 8 .
- embodiments of the present invention are directed to a grinder vehicle for removing traffic markings from an underlying roadway surface.
- the grinder vehicle includes a self propelled drive unit and a grinder head assembly.
- the drive unit includes an engine that drives both the drive unit and the grinder head assembly.
- the grinder head assembly contacts and grinds traffic markings to remove the markings from an underlying roadway surface.
- the roadway surface may be any one of a variety of roadway surfaces, such as concrete, asphalt, or asphalt rubber, among other appropriate roadways.
- the traffic markings may include painted markings, painted lines, epoxy markings, thermoplastic lines, and tape lines, among other appropriate materials for use as a traffic marker.
- FIG. 1 shows a grinder vehicle 10 for removing traffic markings from an underlying roadway surface according to one exemplary embodiment of the present invention.
- the grinder vehicle 10 includes a self propelled drive unit 12 having a cab portion 14 mounted to a frame assembly 24 of the drive unit 12 and supported by front and rear wheels 30 and 32 .
- the cab 14 includes a seat 16 for receiving an operator (not shown) and a steering mechanism 18 for rotating the front wheels 30 to direct the forward or reserve motion of the grinder vehicle 10 .
- the steering mechanism 18 includes a typical steering wheel, disposed in close proximity to the seat 16 and connected to a power steering system.
- the cab 14 also includes foot pedals.
- the foot pedals include a control pedal 20 and a brake pedal 22 .
- the control pedal 20 is connected to a hydrostatic drive of a transmission of the drive unit engine 26 (as shown in FIG. 2 ).
- the brake pedal 22 is connected to a brake pad of each wheel 30 and 32 . Operation of the control and brake pedals 20 and 22 is discussed in detail below.
- a housing assembly 42 that supports a grinder head assembly 40 (as shown in FIG. 3 ) is mounted to and extends forwardly from the frame assembly 24 of the drive unit 12 .
- the grinder head assembly 40 includes a plurality of grinder heads 44 for contacting and grinding traffic markings to remove the markings from an underlying roadway surface.
- the housing assembly 42 is moveable relative to the frame assembly 24 of the drive unit 12 to allow the grinder head assembly 40 to move between a grinding position, wherein the grinder heads 44 contact and grind the traffic markings, and a transporting position, wherein the grinder heads 44 are not in contact with the roadway surface.
- the drive unit engine 26 is connected to the wheels 30 and 32 of the vehicle.
- the drive unit engine 26 drives the front wheels 30 of the drive unit 12 in a 2-wheel drive system.
- the drive unit engine 26 drives both the front and the rear wheels 30 and 32 of the drive unit 12 in a 4-wheel drive system.
- Extending from the drive unit engine 26 is a drive shaft 34 .
- the drive shaft 34 enters a gear box 28 (as shown in FIG. 3 ) and engages and drives a pulley system 36 (as shown in FIG. 3 ), which in turn drives a main shaft 38 of the grinder head assembly 40 (as shown in FIG. 3 .)
- the drive unit 12 is taken from a commercially available lawn mowing tractor, such as a John Deere® 1400 Series Mower, (hereinafter the John Deere® tractor.)
- the John Deere® tractor includes a drive unit similar to that described above having a cab portion mounted to a frame assembly and supported by front and rear wheels.
- a mower assembly is mounted to and extends forwardly from the cab portion, which includes a seat for receiving an operator.
- the mower assembly includes rotary blades for cutting a ground surface.
- the John Deere® tractor is driven by a drive unit engine having a drive shaft that extends from the drive unit engine to engage and rotatably drive the blades of the mower assembly.
- the John Deere® tractor can be modified for use as the drive unit 12 in one embodiment of the present invention by disassembling the mower assembly from the frame assembly of the drive unit, mounting the housing assembly 42 of the grinder head assembly 40 to the frame assembly of the drive unit, and attaching the drive shaft 34 to the gear box 28 to drive the pulley system 36 and the grinder head assembly 40 attached thereto.
- lawn mowing tractors that are suitable for modification and use as the drive unit 12 in exemplary embodiments of the present invention include lawn mowing tractors made commercially available by John Deere®, Jacobsen® and Toro® among other appropriate lawn mowing tractors made commercially available by other suitable manufactures and/or distributes.
- the drive unit in exemplary embodiments of the present invention may also be taken from other types of tractors and/or motored vehicles.
- FIGS. 3-5 show a cut away view, a bottom view and a back view, respectively, of the housing assembly 42 of the grinder head assembly 40 .
- the gear box 28 is mounted to the housing assembly 42 .
- the gear box 28 houses the pulley system 36 .
- the pulley system 36 includes a pulley shaft 47 connected to a belt 48 that drives the main shaft 38 of the grinder head assembly 40 .
- the gear box 28 includes an opening 46 that receives the drive shaft 34 of the drive unit engine 26 .
- the drive shaft 34 has a gear head 49 that engages a gear head 51 of the pulley shaft 47 to transfer a rotation of the drive shaft 34 to the pulley shaft 47 .
- the gear heads 49 and 51 are oriented at a 45 degree angle with respect to each other and the diameter and teeth of the gear heads 49 and 51 have a one to one ratio.
- compressible bushings such as rubber bushings are mounted between the gear box 28 and the housing assembly 42 to reduce vibrations.
- a shroud 60 is also mounted to the housing assembly 42 .
- the shroud 60 houses the grinder heads 44 of the grinder head assembly 40 .
- the grinder head assembly 40 includes a plurality of mounting shafts 52 . Each mounting shaft 52 extends laterally from the main shaft 38 of the grinder head assembly 40 .
- Each grinder head 42 is rotatably mounted about a perimeter of its corresponding mounting shaft 52 . As such, a rotation of the main shaft 38 of the grinder head assembly 40 causes each grinder head 44 to rotate both about the main shaft 38 of the grinder head assembly 40 , as shown by arrow 56 , and about its corresponding mounting shaft 52 , as shown for example by arrow 54 .
- Each grinder head 44 includes a wheel 55 having a plurality of bits or teeth 58 extending peripherally about an outer perimeter thereof to contact and grind a traffic marking to remove the marking from an underlying roadway surface.
- each bit 58 is composed of a tungsten carbide material. The bits 58 contact and grind the traffic markings, while minimizing the grinding of the underlying roadway surface.
- the shroud 60 includes a hinged portion 62 that pivots about a hinge 64 to allow for easy access and/or maintenance to the grinder head assembly 40 .
- the grinder head assembly 40 is a Rotary Cutter Head Assembly as shown in FIG. 6 , which is commercially available from EDCO® (Equipment Development Company.)
- Each Rotary Cutter Head Assembly includes a hub 120 .
- the hub 120 includes a plurality of side openings 122 which each receive a portion of a corresponding one of the plurality of mounting shafts 52 .
- Each mounting shaft 52 is mounted to the hub 120 by a pin 124 .
- Each mounting shaft 52 receives a grinder head 44 .
- Each grinder head 44 is mounted on a smooth surfaced portion of the mounting shaft 52 so that the grinder head 44 is rotatable about the mounting shaft 52 .
- Fasteners threadably engage a threaded portion 128 of the mounting shaft 52 to secure the grinder head 44 to the mounting shaft 52 .
- Washers 131 may be mounted adjacent to the grinder heads 44 for protection.
- a base plate 130 connects the hub 120 to the main shaft 38 of the grinder head assembly 40 so that the hub 120 (and hence each grinder head 44 ) rotates when the main shaft 38 rotates.
- the main shaft includes a laterally extending mounting plate 135 .
- the mounting plate 135 includes openings 138 that are aligned with corresponding openings 132 and 136 in the hub 120 and the base plate 130 .
- Fasteners 134 extend through the openings in the base plate 120 , the hub 120 and the mounting plate 135 of the main shaft 38 and engage nuts 140 to secure the hub 120 to the main shaft 38 .
- An inner bushing 142 such as a rubber bushing
- an outer bushing 144 are disposed in surrounding relation to the fasteners 134 to reduce vibrations.
- Each grinder head 44 includes a plurality of bits 58 , such as tungsten carbide bits.
- each grinder head 44 includes either 24 bits (part number TR3-24) or 48 bits (part number TR3-48.)
- the drive shaft 34 is electrically connected to a clutch and is only activated when the clutch is activated.
- the clutch is activated by a toggle switch 73 having on and off positions.
- the clutch switch 73 is located in cab 14 of the drive unit 12 in close proximity to the seat 16 , such as on a column 74 of the steering mechanism 18 .
- the clutch is an electric magnet clutch.
- the rotational speed of the drive unit engine 26 (and hence the rotational speeds of the drive shaft 34 , the pulley shaft 47 , the pulley belt 48 , the main shaft 38 of the grinder head assembly 40 and each grinder head 44 ) is variable and controlled by varying the position of a control lever 70 disposed in the cab 14 of the drive unit 12 in close proximity to the seat 16 (as shown in FIG. 1 ). In one embodiment, the more the control lever 70 is moved from an idle position, the faster the rotational speed of the drive unit engine 26 .
- a support bar 80 is mounted to the frame assembly 24 of the drive unit 12 , such as by mounting plates 82 and fasteners 81 and/or welding.
- the support bar 80 is rotatably mounted to the mounting plates 82 .
- the housing assembly 42 is mounted to the support bar 80 .
- the support bar 80 includes arms 83 that are mounted to a connecting rod 84 and the housing assembly 42 includes arms 85 that are similarly mounted to the connecting rod 84 , such that a movement of the support bar 80 causes a corresponding movement of the housing assembly 42 .
- a pivot adjuster 66 is connected to the housing assembly 42 to pivotally adjust the housing assembly 42 and hence the grinder head assembly 40 mounted therein. Pivotally adjusting the grinder head assembly 40 facilitates the grinding of traffic markings from a crowned, angled or otherwise irregular roadway surface.
- the pivot adjuster 66 includes a threaded rod 68 having a handle 90 that is disposed in close proximity to the seat 16 of the cab 14 of the drive unit 12 .
- the handle 90 is used to rotate the threaded rod 68 as shown by arrow 91 . Rotation of the handle 90 causes the housing assembly 42 to pivot about an axis 95 as shown by arrow 96 and described in more detail below.
- the pivot adjuster 66 is connected to both the support bar 80 and the housing assembly 42 .
- the pivot adjuster 66 is connected to a collar 87 that, in turn, is connected to the support bar 80 through a pivot arm 88 , which is pivotally connected to the support bar 80 .
- the collar 87 is held to the threaded rod 68 by fasteners 97 .
- the collar 87 has an internal bore that prevents the collar 87 from moving relative to the threaded rod 68 when the handle 90 is rotated.
- the pivot adjuster 66 is also connected to the housing assembly 42 .
- the pivot adjuster 66 is connected to the housing assembly 42 by an protruding arm 86 of the housing assembly 42 .
- the arm 86 has internal threads that threadably engage the threads of the threaded rod 68 , such that rotation of the handle 90 causes a corresponding movement of the arm 86 along the threaded rod 68 .
- rotation of the handle 90 causes a relative movement between the protruding arm 86 of the housing assembly 42 and the collar 87 of the support bar 80 .
- the hydraulic cylinder 100 has a shaft portion 101 that is moveable relative to a body portion 103 by the action of hydraulic fluids.
- the hydraulic cylinder 100 is rigidly mounted to the frame assembly 24 of the drive unit 12 , such as by one or more fasteners 104 and/or welding.
- the hydraulic cylinder 100 is also rigidly mounted to a mounting plate 102 that extends from the support bar 80 .
- Movement of the shaft 101 of the hydraulic cylinder 100 relative to the body of the hydraulic cylinder 100 causes the mounting plate 102 to rotate the support bar 80 as shown by arrow 112 .
- This causes the connecting rod 84 and the housing assembly 42 of the grinder head assembly 40 to corresponding rotate as shown by arrow 112 .
- the downward pressure, as indicated by arrow 114 that the grinder heads 44 apply to the traffic markings of an underlying roadway surface 110 is varied.
- hoses are connected to the hydraulic cylinder 100 to add or remove hydraulic fluid from the hydraulic cylinder 100 .
- the hoses are connected to a hydraulic control lever 71 , which is located in close proximity to the seat 16 in the cab 14 of the drive unit 12 .
- the hydraulic control lever 71 actuates valves connected to the hydraulic fluid hoses to control the amount of hydraulic fluid that is distributed to or removed from the hydraulic cylinder 100 .
- the hydraulic control lever 71 has a neutral position where the grinder heads 44 are not in contact with the surface to be grinded 110 . Moving the hydraulic control lever 71 away from the neutral position causes the hydraulic cylinder 100 to move the grinder heads 44 into contact with the surface 110 to be grinded. Each movement of the hydraulic control lever 71 away from the neutral position increases the downward pressure that the grinder heads 44 apply to the surface 110 to be grinded.
- the hydraulic cylinder 100 can exert up to approximately 1600 psi (pounds per square inch) of pressure.
- the down pressure that the grinder heads 44 apply to the surface 110 to be grinded can vary from zero to approximately 1600 psi.
- the control pedal 20 To drive the grinder vehicle 10 in either the forward or reverse directions, the control pedal 20 must be depressed and the control lever 70 must be moved from an idle position. Depressing the control pedal 20 activates the hydrostatic drive of the transmission of the drive unit engine 26 . The control pedal 20 controls the amount of fuel that is distributed to the drive unit engine 26 . Thus, the more the control lever 70 is moved from an idle position, the more fuel that is distributed to the drive unit engine 26 and the faster the rotational speed of the drive unit engine 26 . To drive the grinder vehicle 10 in a forward direction, a top portion of the control pedal is depressed. To drive the grinder vehicle 10 in a reverse direction, a bottom portion of the control pedal is depressed.
- the grinder heads 44 can either be activated to grind a surface or deactivated by toggling the clutch switch 73 , which controls the drive shaft 34 of the drive unit engine 26 .
- the drive shaft 34 drives the grinder heads 44 as described above.
- a grinding operation can also be performed when the grinder vehicle 10 is stationary.
- the clutch switch 73 is turned to the on position, thus activating the drive shaft 34 of the drive unit engine 26 , and the control lever 70 is moved from an idle position, while the control pedal 20 is not depressed.
- the grinder head assembly 40 is activated but the hydrostatic drive of the transmission of the drive unit engine 26 is not activated. As such, the grinder head assembly 40 can grind a surface while the grinder vehicle 10 is stationary.
- the drive unit engine 26 is a twenty four Horsepower, three cylinder, liquid cooled diesel engine. Such an engine is much larger than engines used in traffic marking removers of the prior art. Using a twenty four horsepower engine allows the drive unit 12 to drive the grinder vehicle 10 to a speed in a range of approximately zero to twelve mph (miles per hour) in the forward direction and to a speed in a range of approximately zero to five mph (miles per hour) in the reverse direction.
- the control lever 70 controls the speed of rotation of the drive unit engine 26 and the engine 26 drives the grinder heads 44 through the drive shaft 34 , the control lever 70 also controls the speed of rotation of the grinder heads 44 . Therefore, the speed of rotation of the grinder heads 44 is also variable.
- the drive shaft 34 rotates each grinder head 44 at a speed in the range of approximately 200 rpm (revolutions per minute) to approximately 1600 rpm. Rotating the grinder heads 44 against the traffic markings of an underlying roadway surface at such high rotational speeds allows the grinder vehicle 10 to remove the traffic markings at a much faster rate than other grinders.
- a water tank 70 and a vacuum are each attached to the cab 14 of the drive unit 12 .
- the water tank 70 and vacuum are each connected to a hose 72 and 74 having an opening in close proximity to the grinder head assembly 40 .
- Water from the water tank 70 may be applied in close proximity to the grinder head assembly 40 during a grinding operation to reduce dust from rising in the area above the roadway being grinded.
- the vacuum hose 74 may be placed in close proximity to the grinder head assembly 40 during a grinding operation to collect the dust that rises in the area above the roadway being grinded.
- the water tank 70 may be controlled by actuation of a valve and the vacuum may be activated by an electronic switch.
- a lower portion 65 of the shroud 60 is composed of a compressible material such as rubber. During a grinding operation, the lower portion 65 of the shroud 60 is compressed against the surface being grinded to help control the rising of dust from the surface being grinded.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A grinder vehicle for removing traffic markings from an underlying roadway surface is provided. The grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels. A drive shaft is connected to the drive unit engine. A grinder head assembly is connected to the frame assembly of the drive unit and is driven by the drive shaft of the drive unit engine. The grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface.
Description
- This invention relates to a grinder vehicle for removing traffic markings from an underlying roadway surface, and more particularly, to such a grinder vehicle having a self propelled drive unit with an engine that drives both the drive unit and a grinder head assembly.
- Roadways are often constructed from concrete or asphalt materials. Traffic markings, such as painted markings, painted lines, epoxy markings, thermoplastic lines, and tape lines, among other markings, are often applied to roadway surfaces to direct traffic. Occasionally, it becomes necessary to remove traffic markings from roadway surfaces.
- Traditionally, traffic line removal has been accomplished by manually propelled grinders. Often these grinders remove the traffic markings at an undesirably slow rate and leave undesirably large indentations in the roadway surface in the areas where the traffic lines have been removed.
- Some traffic line removal units have a grinder that is connected to a separate, independently driven self-propelled drive unit. However, although the self-propelled drive unit facilitates movement of the grinder, the motor in the grinder remains relatively small, causing the traffic marking removal rate of the traffic line removal unit to remain undesirably slow. Accordingly a need exists for an improved grinder for traffic lines from an underlying roadway surface.
- In one embodiment, the present invention is a grinder vehicle for removing traffic markings from an underlying roadway surface. The grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels. A drive shaft is connected to the drive unit engine. A grinder head assembly is connected to the frame assembly of the drive unit and is driven by the drive shaft of the drive unit engine. The grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface.
- In another embodiment, the present invention is a grinder vehicle for removing traffic markings from an underlying roadway surface. The grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels. A drive shaft is connected to the drive unit engine. A grinder head assembly is connected to the frame assembly of the drive unit and includes a main shaft that is driven by the drive shaft of the drive unit engine. A plurality of grinder heads for removing the traffic markings from the underlying roadway surface is mounted to and rotatable by the main shaft of the grinder head assembly. A downward pressure adjuster is connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
- In yet another embodiment, the present invention is a grinder vehicle for removing traffic markings from an underlying roadway surface. The grinder vehicle includes a drive unit having a frame assembly supported by a plurality of wheels and a drive unit engine that drives at least one of the plurality of wheels. A drive shaft is connected to the drive unit engine. A grinder head assembly is connected to the frame assembly of the drive unit and includes a main shaft that is driven by the drive shaft of the drive unit engine. A plurality of grinder heads for removing the traffic markings from the underlying roadway surface is mounted to and rotatable by the main shaft of the grinder head assembly. A hydraulic cylinder is connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface. A pivot adjuster is connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
- In still another embodiment, the present invention is a grinder for removing traffic markings from an underlying roadway surface that includes a grinder head assembly and a downward pressure adjuster. The grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface. the downward pressure adjuster is connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
- In another embodiment, the present invention is a grinder for removing traffic markings from an underlying roadway surface that includes a grinder head assembly and a pivot adjuster. The grinder head assembly includes a plurality of grinder heads for removing the traffic markings from the underlying roadway surface. The pivot adjuster is connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
-
FIG. 1 is a schematic perspective view of a grinder for removing traffic markings according to one embodiment of the invention having a drive unit and a grinder head assembly. -
FIG. 2 is a schematic representation of a drive unit engine that drives both the drive unit and the grinder head assembly of the grinder for removing traffic markings ofFIG. 1 ; -
FIG. 3 is a cutaway view of a frame assembly that houses the grinder head assembly ofFIG. 1 ; -
FIG. 4 is a back view of the frame assembly ofFIG. 3 ; -
FIG. 5 is a bottom view of the frame assembly ofFIG. 3 ; -
FIG. 6 is an exploded view of a grinder head assembly for use in the grinder for removing traffic markings according to one embodiment of the invention; -
FIG. 7 is schematic side view of a gear box showing the mating of a drive shaft of the drive unit and a pulley shaft that is connected to the grinder head assembly; -
FIG. 8 is a front view of the frame assembly ofFIG. 3 showing a pivot adjuster attached thereto for pivotally adjusting the frame assembly; and -
FIG. 9 is a side view of the frame assembly ofFIG. 8 . - As shown in
FIGS. 1-9 , embodiments of the present invention are directed to a grinder vehicle for removing traffic markings from an underlying roadway surface. The grinder vehicle includes a self propelled drive unit and a grinder head assembly. The drive unit includes an engine that drives both the drive unit and the grinder head assembly. The grinder head assembly contacts and grinds traffic markings to remove the markings from an underlying roadway surface. - The roadway surface may be any one of a variety of roadway surfaces, such as concrete, asphalt, or asphalt rubber, among other appropriate roadways. The traffic markings may include painted markings, painted lines, epoxy markings, thermoplastic lines, and tape lines, among other appropriate materials for use as a traffic marker.
-
FIG. 1 shows agrinder vehicle 10 for removing traffic markings from an underlying roadway surface according to one exemplary embodiment of the present invention. Thegrinder vehicle 10 includes a self propelleddrive unit 12 having acab portion 14 mounted to aframe assembly 24 of thedrive unit 12 and supported by front andrear wheels cab 14 includes aseat 16 for receiving an operator (not shown) and asteering mechanism 18 for rotating thefront wheels 30 to direct the forward or reserve motion of thegrinder vehicle 10. In one embodiment, thesteering mechanism 18 includes a typical steering wheel, disposed in close proximity to theseat 16 and connected to a power steering system. - The
cab 14 also includes foot pedals. The foot pedals include a control pedal 20 and abrake pedal 22. The control pedal 20 is connected to a hydrostatic drive of a transmission of the drive unit engine 26 (as shown inFIG. 2 ). Thebrake pedal 22 is connected to a brake pad of eachwheel brake pedals 20 and 22 is discussed in detail below. - A
housing assembly 42 that supports a grinder head assembly 40 (as shown inFIG. 3 ) is mounted to and extends forwardly from theframe assembly 24 of thedrive unit 12. As shown inFIG. 3 , thegrinder head assembly 40 includes a plurality ofgrinder heads 44 for contacting and grinding traffic markings to remove the markings from an underlying roadway surface. - As described in detail below, the
housing assembly 42 is moveable relative to theframe assembly 24 of thedrive unit 12 to allow thegrinder head assembly 40 to move between a grinding position, wherein the grinder heads 44 contact and grind the traffic markings, and a transporting position, wherein thegrinder heads 44 are not in contact with the roadway surface. - As shown in
FIG. 2 , thedrive unit engine 26 is connected to thewheels drive unit engine 26 drives thefront wheels 30 of thedrive unit 12 in a 2-wheel drive system. In another embodiment, thedrive unit engine 26 drives both the front and therear wheels drive unit 12 in a 4-wheel drive system. Extending from thedrive unit engine 26 is adrive shaft 34. Thedrive shaft 34 enters a gear box 28 (as shown inFIG. 3 ) and engages and drives a pulley system 36 (as shown inFIG. 3 ), which in turn drives amain shaft 38 of the grinder head assembly 40 (as shown inFIG. 3 .) - In one embodiment, the
drive unit 12 is taken from a commercially available lawn mowing tractor, such as a John Deere® 1400 Series Mower, (hereinafter the John Deere® tractor.) The John Deere® tractor includes a drive unit similar to that described above having a cab portion mounted to a frame assembly and supported by front and rear wheels. A mower assembly is mounted to and extends forwardly from the cab portion, which includes a seat for receiving an operator. The mower assembly includes rotary blades for cutting a ground surface. The John Deere® tractor is driven by a drive unit engine having a drive shaft that extends from the drive unit engine to engage and rotatably drive the blades of the mower assembly. - The John Deere® tractor can be modified for use as the
drive unit 12 in one embodiment of the present invention by disassembling the mower assembly from the frame assembly of the drive unit, mounting thehousing assembly 42 of thegrinder head assembly 40 to the frame assembly of the drive unit, and attaching thedrive shaft 34 to thegear box 28 to drive thepulley system 36 and thegrinder head assembly 40 attached thereto. - Other lawn mowing tractors that are suitable for modification and use as the
drive unit 12 in exemplary embodiments of the present invention include lawn mowing tractors made commercially available by John Deere®, Jacobsen® and Toro® among other appropriate lawn mowing tractors made commercially available by other suitable manufactures and/or distributes. In addition, the drive unit in exemplary embodiments of the present invention may also be taken from other types of tractors and/or motored vehicles. -
FIGS. 3-5 show a cut away view, a bottom view and a back view, respectively, of thehousing assembly 42 of thegrinder head assembly 40. As shown, thegear box 28 is mounted to thehousing assembly 42. Thegear box 28 houses thepulley system 36. Thepulley system 36 includes apulley shaft 47 connected to abelt 48 that drives themain shaft 38 of thegrinder head assembly 40. - The
gear box 28 includes anopening 46 that receives thedrive shaft 34 of thedrive unit engine 26. As shown inFIG. 7 , thedrive shaft 34 has agear head 49 that engages agear head 51 of thepulley shaft 47 to transfer a rotation of thedrive shaft 34 to thepulley shaft 47. In the depicted embodiment, the gear heads 49 and 51 are oriented at a 45 degree angle with respect to each other and the diameter and teeth of the gear heads 49 and 51 have a one to one ratio. Preferably, compressible bushings, such as rubber bushings are mounted between thegear box 28 and thehousing assembly 42 to reduce vibrations. - A
shroud 60 is also mounted to thehousing assembly 42. Theshroud 60 houses the grinder heads 44 of thegrinder head assembly 40. Thegrinder head assembly 40 includes a plurality of mountingshafts 52. Each mountingshaft 52 extends laterally from themain shaft 38 of thegrinder head assembly 40. Eachgrinder head 42 is rotatably mounted about a perimeter of its corresponding mountingshaft 52. As such, a rotation of themain shaft 38 of thegrinder head assembly 40 causes eachgrinder head 44 to rotate both about themain shaft 38 of thegrinder head assembly 40, as shown byarrow 56, and about its corresponding mountingshaft 52, as shown for example by arrow 54. - Each
grinder head 44 includes awheel 55 having a plurality of bits orteeth 58 extending peripherally about an outer perimeter thereof to contact and grind a traffic marking to remove the marking from an underlying roadway surface. In one embodiment, eachbit 58 is composed of a tungsten carbide material. Thebits 58 contact and grind the traffic markings, while minimizing the grinding of the underlying roadway surface. As shown inFIGS. 3 and 4 , theshroud 60 includes a hingedportion 62 that pivots about ahinge 64 to allow for easy access and/or maintenance to thegrinder head assembly 40. - In one embodiment, the
grinder head assembly 40 is a Rotary Cutter Head Assembly as shown inFIG. 6 , which is commercially available from EDCO® (Equipment Development Company.) Each Rotary Cutter Head Assembly includes ahub 120. Thehub 120 includes a plurality of side openings 122 which each receive a portion of a corresponding one of the plurality of mountingshafts 52. Each mountingshaft 52 is mounted to thehub 120 by apin 124. Each mountingshaft 52, in turn, receives agrinder head 44. Eachgrinder head 44 is mounted on a smooth surfaced portion of the mountingshaft 52 so that thegrinder head 44 is rotatable about the mountingshaft 52. Fasteners threadably engage a threadedportion 128 of the mountingshaft 52 to secure thegrinder head 44 to the mountingshaft 52.Washers 131 may be mounted adjacent to the grinder heads 44 for protection. - A
base plate 130 connects thehub 120 to themain shaft 38 of thegrinder head assembly 40 so that the hub 120 (and hence each grinder head 44) rotates when themain shaft 38 rotates. The main shaft includes a laterally extending mountingplate 135. The mountingplate 135 includesopenings 138 that are aligned with correspondingopenings hub 120 and thebase plate 130.Fasteners 134 extend through the openings in thebase plate 120, thehub 120 and the mountingplate 135 of themain shaft 38 and engagenuts 140 to secure thehub 120 to themain shaft 38. An inner bushing 142 (such as a rubber bushing) and an outer bushing 144 (such as rubber bushings) are disposed in surrounding relation to thefasteners 134 to reduce vibrations. Eachgrinder head 44 includes a plurality ofbits 58, such as tungsten carbide bits. Preferably eachgrinder head 44 includes either 24 bits (part number TR3-24) or 48 bits (part number TR3-48.) - Other grinder head assemblies and/or grinder heads that are suitable for use in exemplary embodiments of the present invention include grinder head assemblies and/or grinder heads made commercially available by EDCO® or Smith Manufacturing Company®, among other suitable manufactures and/or distributors.
- In one embodiment, the
drive shaft 34 is electrically connected to a clutch and is only activated when the clutch is activated. In the embodiment ofFIG. 1 , the clutch is activated by atoggle switch 73 having on and off positions. Theclutch switch 73 is located incab 14 of thedrive unit 12 in close proximity to theseat 16, such as on acolumn 74 of thesteering mechanism 18. In one embodiment, the clutch is an electric magnet clutch. - The rotational speed of the drive unit engine 26 (and hence the rotational speeds of the
drive shaft 34, thepulley shaft 47, thepulley belt 48, themain shaft 38 of thegrinder head assembly 40 and each grinder head 44) is variable and controlled by varying the position of acontrol lever 70 disposed in thecab 14 of thedrive unit 12 in close proximity to the seat 16 (as shown inFIG. 1 ). In one embodiment, the more thecontrol lever 70 is moved from an idle position, the faster the rotational speed of thedrive unit engine 26. - As shown, in
FIGS. 1, 8 and 9, asupport bar 80 is mounted to theframe assembly 24 of thedrive unit 12, such as by mountingplates 82 andfasteners 81 and/or welding. Thesupport bar 80 is rotatably mounted to the mountingplates 82. Thehousing assembly 42, in turn, is mounted to thesupport bar 80. In the embodiment ofFIG. 8 , thesupport bar 80 includesarms 83 that are mounted to a connectingrod 84 and thehousing assembly 42 includesarms 85 that are similarly mounted to the connectingrod 84, such that a movement of thesupport bar 80 causes a corresponding movement of thehousing assembly 42. - As shown in
FIGS. 1, 8 and 9, apivot adjuster 66 is connected to thehousing assembly 42 to pivotally adjust thehousing assembly 42 and hence thegrinder head assembly 40 mounted therein. Pivotally adjusting thegrinder head assembly 40 facilitates the grinding of traffic markings from a crowned, angled or otherwise irregular roadway surface. - The
pivot adjuster 66 includes a threadedrod 68 having ahandle 90 that is disposed in close proximity to theseat 16 of thecab 14 of thedrive unit 12. Thehandle 90 is used to rotate the threadedrod 68 as shown byarrow 91. Rotation of thehandle 90 causes thehousing assembly 42 to pivot about anaxis 95 as shown byarrow 96 and described in more detail below. - The
pivot adjuster 66 is connected to both thesupport bar 80 and thehousing assembly 42. Thepivot adjuster 66 is connected to acollar 87 that, in turn, is connected to thesupport bar 80 through apivot arm 88, which is pivotally connected to thesupport bar 80. Thecollar 87 is held to the threadedrod 68 byfasteners 97. Thecollar 87 has an internal bore that prevents thecollar 87 from moving relative to the threadedrod 68 when thehandle 90 is rotated. - The
pivot adjuster 66 is also connected to thehousing assembly 42. Thepivot adjuster 66 is connected to thehousing assembly 42 by an protrudingarm 86 of thehousing assembly 42. Thearm 86 has internal threads that threadably engage the threads of the threadedrod 68, such that rotation of thehandle 90 causes a corresponding movement of thearm 86 along the threadedrod 68. Thus, rotation of thehandle 90 causes a relative movement between the protrudingarm 86 of thehousing assembly 42 and thecollar 87 of thesupport bar 80. This movement, along with the non-rigid connection ofarms rod 85, which connects thesupport bar 80 to thehousing assembly 42, allows thehousing assembly 42 to pivot about theaxis 95 as shown by thearrow 96. - As shown in
FIG. 9 , also connected to thesupport bar 80 is ahydraulic cylinder 100. Thehydraulic cylinder 100 has ashaft portion 101 that is moveable relative to abody portion 103 by the action of hydraulic fluids. Thehydraulic cylinder 100 is rigidly mounted to theframe assembly 24 of thedrive unit 12, such as by one ormore fasteners 104 and/or welding. Thehydraulic cylinder 100 is also rigidly mounted to a mountingplate 102 that extends from thesupport bar 80. - Movement of the
shaft 101 of thehydraulic cylinder 100 relative to the body of thehydraulic cylinder 100 causes the mountingplate 102 to rotate thesupport bar 80 as shown byarrow 112. This, in turn, causes the connectingrod 84 and thehousing assembly 42 of thegrinder head assembly 40 to corresponding rotate as shown byarrow 112. By varying the force of thehydraulic cylinder 100 exerted on the mounting plate of thesupport bar 80 the downward pressure, as indicated byarrow 114, that the grinder heads 44 apply to the traffic markings of anunderlying roadway surface 110 is varied. - In one embodiment, hoses are connected to the
hydraulic cylinder 100 to add or remove hydraulic fluid from thehydraulic cylinder 100. The hoses are connected to a hydraulic control lever 71, which is located in close proximity to theseat 16 in thecab 14 of thedrive unit 12. The hydraulic control lever 71 actuates valves connected to the hydraulic fluid hoses to control the amount of hydraulic fluid that is distributed to or removed from thehydraulic cylinder 100. The hydraulic control lever 71 has a neutral position where the grinder heads 44 are not in contact with the surface to be grinded 110. Moving the hydraulic control lever 71 away from the neutral position causes thehydraulic cylinder 100 to move the grinder heads 44 into contact with thesurface 110 to be grinded. Each movement of the hydraulic control lever 71 away from the neutral position increases the downward pressure that the grinder heads 44 apply to thesurface 110 to be grinded. - In one embodiment, the
hydraulic cylinder 100 can exert up to approximately 1600 psi (pounds per square inch) of pressure. As a result, by movement of the hydraulic control lever 71, the down pressure that the grinder heads 44 apply to thesurface 110 to be grinded can vary from zero to approximately 1600 psi. - To drive the
grinder vehicle 10 in either the forward or reverse directions, the control pedal 20 must be depressed and thecontrol lever 70 must be moved from an idle position. Depressing the control pedal 20 activates the hydrostatic drive of the transmission of thedrive unit engine 26. The control pedal 20 controls the amount of fuel that is distributed to thedrive unit engine 26. Thus, the more thecontrol lever 70 is moved from an idle position, the more fuel that is distributed to thedrive unit engine 26 and the faster the rotational speed of thedrive unit engine 26. To drive thegrinder vehicle 10 in a forward direction, a top portion of the control pedal is depressed. To drive thegrinder vehicle 10 in a reverse direction, a bottom portion of the control pedal is depressed. - When the
grinder vehicle 10 is being driven, the grinder heads 44 can either be activated to grind a surface or deactivated by toggling theclutch switch 73, which controls thedrive shaft 34 of thedrive unit engine 26. Thedrive shaft 34 drives the grinder heads 44 as described above. An advantage of having a singledrive unit engine 26 that drives both thedrive unit 12 and thegrinder head assembly 40 and having thegrinder head assembly 40 activated by the actuation of a clutch is that thedrive unit 12 can be driven to a desired location while thegrinder head assembly 40 remains in a inactivated state. Thegrinder head assembly 40 can then be activated only when it is desired to grind a surface, increasing the safety of thegrinder vehicle 10. - A grinding operation can also be performed when the
grinder vehicle 10 is stationary. In order to perform such an operation, theclutch switch 73 is turned to the on position, thus activating thedrive shaft 34 of thedrive unit engine 26, and thecontrol lever 70 is moved from an idle position, while the control pedal 20 is not depressed. Thus, thegrinder head assembly 40 is activated but the hydrostatic drive of the transmission of thedrive unit engine 26 is not activated. As such, thegrinder head assembly 40 can grind a surface while thegrinder vehicle 10 is stationary. As discussed above, the more thecontrol lever 70 is moved from an idle position, the more fuel that is distributed to thedrive unit engine 26 and the faster the rotational speed of the drive unit engine 26 (and hence thedrive shaft 34 and thegrinder head assembly 40 driven thereby.) In one embodiment, thedrive unit engine 26 is a twenty four Horsepower, three cylinder, liquid cooled diesel engine. Such an engine is much larger than engines used in traffic marking removers of the prior art. Using a twenty four horsepower engine allows thedrive unit 12 to drive thegrinder vehicle 10 to a speed in a range of approximately zero to twelve mph (miles per hour) in the forward direction and to a speed in a range of approximately zero to five mph (miles per hour) in the reverse direction. - Since the
control lever 70 controls the speed of rotation of thedrive unit engine 26 and theengine 26 drives the grinder heads 44 through thedrive shaft 34, thecontrol lever 70 also controls the speed of rotation of the grinder heads 44. Therefore, the speed of rotation of the grinder heads 44 is also variable. In one embodiment, thedrive shaft 34 rotates eachgrinder head 44 at a speed in the range of approximately 200 rpm (revolutions per minute) to approximately 1600 rpm. Rotating the grinder heads 44 against the traffic markings of an underlying roadway surface at such high rotational speeds allows thegrinder vehicle 10 to remove the traffic markings at a much faster rate than other grinders. - As shown in
FIG. 1 , awater tank 70 and a vacuum (not shown) are each attached to thecab 14 of thedrive unit 12. Thewater tank 70 and vacuum are each connected to ahose 72 and 74 having an opening in close proximity to thegrinder head assembly 40. Water from thewater tank 70 may be applied in close proximity to thegrinder head assembly 40 during a grinding operation to reduce dust from rising in the area above the roadway being grinded. Thevacuum hose 74 may be placed in close proximity to thegrinder head assembly 40 during a grinding operation to collect the dust that rises in the area above the roadway being grinded. Thewater tank 70 may be controlled by actuation of a valve and the vacuum may be activated by an electronic switch. The water valve and the electronic switch of the vacuum are each mounted in close proximity to theseat 16 in thecab 14 of thedrive unit 12. In addition, as shown, for example inFIGS. 1, 3 , 4 and 9, alower portion 65 of theshroud 60 is composed of a compressible material such as rubber. During a grinding operation, thelower portion 65 of theshroud 60 is compressed against the surface being grinded to help control the rising of dust from the surface being grinded. - The preceding description has been presented with reference to various embodiments of the invention. Persons skilled in the art and technology to which this invention pertains will appreciate that alterations and changes in the described structures and methods of operation can be practiced without meaningfully departing from the principle, spirit and scope of this invention.
Claims (29)
1. A grinder vehicle for removing traffic markings from an underlying roadway surface, comprising:
a drive unit having a frame assembly supported by a plurality of wheels;
a drive unit engine that drives at least one of the plurality of wheels;
a drive shaft connected to the drive unit engine; and
a grinder head assembly connected to the frame assembly of the drive unit and driven by the drive shaft of the drive unit engine, wherein the grinder head assembly comprises a plurality of grinder heads for removing the traffic markings from the underlying roadway surface.
2. A grinder vehicle of claim 1 , wherein each grinder head includes a wheel having a plurality of bits extending from an outer perimeter thereof that contact and grind the traffic markings from the underlying roadway surface, while minimizing the grinding of the underlying roadway surface.
3. A grinder vehicle of claim 2 , wherein each grinder bit comprises a tungsten carbide material.
4. A grinder vehicle of claim 1 , further comprising a downward pressure adjuster connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
5. A grinder vehicle of claim 1 , further comprising a hydraulic cylinder connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
6. A grinder vehicle of claim 1 , further comprising a pivot adjuster connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
7. A grinder vehicle of claim 1 , further comprising:
a housing assembly connected to the frame assembly of the drive unit and housing the grinder head assembly; and
a pivot adjuster that moves the housing assembly relative the frame assembly of the drive unit to pivotally adjust the positioning of the grinder head assembly with respect to the underlying roadway surface.
8. A grinder vehicle of claim 7 , wherein the pivot adjuster is a threaded rod that threadably engages a threaded arm of the housing assembly to move the threaded arm along the threaded rod upon rotation of the threaded rod, which pivotally adjusts the positioning of the grinder head assembly with respect to the underlying roadway surface.
9. A grinder vehicle of claim 1 , wherein drive unit engine is at least a twenty four horsepower engine
10. A grinder vehicle of claim 1 , wherein drive unit engine drives the drive unit to a speed in a range of approximately zero miles per hour to approximately twelve miles per hour.
11. A grinder vehicle of claim 1 , wherein drive shaft of the drive unit engine rotates each grinder head to a speed in a range of approximately 200 revolutions per minute to approximately 1600 revolutions per minute.
12. A grinder vehicle for removing traffic markings from an underlying roadway surface, comprising:
a drive unit having a frame assembly supported by a plurality of wheels;
a drive unit engine that drives at least one of the plurality of wheels;
a drive shaft connected to the drive unit engine; and
a grinder head assembly connected to the frame assembly of the drive unit and comprising a main shaft that is driven by the drive shaft of the drive unit engine, wherein a plurality of grinder heads for removing the traffic markings from the underlying roadway surface are mounted to and rotatable by the main shaft of the grinder head assembly; and
a downward pressure adjuster connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
13. A grinder vehicle of claim 12 , wherein the downward pressure adjuster is a hydraulic cylinder.
14. A grinder vehicle of claim 12 , wherein each grinder head includes a wheel having a plurality of tungsten carbide bits extending from an outer perimeter thereof that contact and grind the traffic markings from the underlying roadway surface, while minimizing the grinding of the underlying roadway surface.
15. A grinder vehicle of claim 12 , further comprising a pivot adjuster connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
16. A grinder vehicle of claim 12 , further comprising:
a housing assembly connected to the frame assembly of the drive unit and housing the grinder head assembly; and
a pivot adjuster that moves the housing assembly relative the frame assembly of the drive unit to pivotally adjust the positioning of the grinder head assembly with respect to the underlying roadway surface.
17. A grinder vehicle of claim 16 , wherein the pivot adjuster is a threaded rod that threadably engages a threaded arm of the housing assembly to move the threaded arm along the threaded rod upon rotation of the threaded rod, which pivotally adjusts the positioning of the grinder head assembly with respect to the underlying roadway surface.
18. A grinder vehicle of claim 12 , wherein drive unit engine is at least a twenty four horsepower engine
19. A grinder vehicle of claim 12 , wherein drive unit engine drives the drive unit to a speed in a range of approximately zero miles per hour to approximately twelve miles per hour.
20. A grinder vehicle of claim 12 , wherein drive shaft of the drive unit engine rotates each grinder head to a speed in a range of approximately 200 revolutions per minute to approximately 1600 revolutions per minute.
21. A grinder vehicle for removing traffic markings from an underlying roadway surface, comprising:
a drive unit having a frame assembly supported by a plurality of wheels;
a drive unit engine that drives at least one of the plurality of wheels;
a drive shaft connected to the drive unit engine; and
a grinder head assembly connected to the frame assembly of the drive unit and comprising a main shaft that is driven by the drive shaft of the drive unit engine, wherein a plurality of grinder heads for removing the traffic markings from the underlying roadway surface are mounted to and rotatable by the main shaft of the grinder head assembly;
a hydraulic cylinder connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface; and
a pivot adjuster connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
22. A grinder vehicle of claim 21 , wherein each grinder head includes a wheel having a plurality of tungsten carbide bits extending from an outer perimeter thereof that contact and grind the traffic markings from the underlying roadway surface, while minimizing the grinding of the underlying roadway surface.
23. A grinder vehicle of claim 21 , further comprising:
a housing assembly connected to the frame assembly of the drive unit and housing the grinder head assembly; and
a pivot adjuster that moves the housing assembly relative the frame assembly of the drive unit to pivotally adjust the positioning of the grinder head assembly with respect to the underlying roadway surface.
24. A grinder vehicle of claim 23 , wherein the pivot adjuster is a threaded rod that threadably engages a threaded arm of the housing assembly to move the threaded arm along the threaded rod upon rotation of the threaded rod, which pivotally adjusts the positioning of the grinder head assembly with respect to the underlying roadway surface.
25. A grinder vehicle of claim 21 , wherein drive unit engine is at least a twenty four horsepower engine
26. A grinder vehicle of claim 21 , wherein drive unit engine drives the drive unit to a speed in a range of approximately zero miles per hour to approximately twelve miles per hour.
27. A grinder vehicle of claim 21 , wherein drive shaft of the drive unit engine rotates each grinder head to a speed in a range of approximately 200 revolutions per minute to approximately 1600 revolutions per minute.
28. A grinder for removing traffic markings from an underlying roadway surface, comprising:
a grinder head assembly comprising a plurality of grinder heads for removing the traffic markings from the underlying roadway surface; and
a downward pressure adjuster connected to the grinder head assembly for varying a downward pressure that each grinder head applies to the traffic markings and the underlying roadway surface.
29. A grinder for removing traffic markings from an underlying roadway surface, comprising:
a grinder head assembly comprising a plurality of grinder heads for removing the traffic markings from the underlying roadway surface; and
a pivot adjuster connected to the grinder head assembly for pivotally adjusting the position of the grinder head assembly with respect to the underlying roadway surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/735,493 US20050127741A1 (en) | 2003-12-11 | 2003-12-11 | Grinder vehicle for removing traffic markings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/735,493 US20050127741A1 (en) | 2003-12-11 | 2003-12-11 | Grinder vehicle for removing traffic markings |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050127741A1 true US20050127741A1 (en) | 2005-06-16 |
Family
ID=34653632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/735,493 Abandoned US20050127741A1 (en) | 2003-12-11 | 2003-12-11 | Grinder vehicle for removing traffic markings |
Country Status (1)
Country | Link |
---|---|
US (1) | US20050127741A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130038113A1 (en) * | 2010-05-10 | 2013-02-14 | Norihide Wakita | Underwater miner cutter head, underwater miner, and underwater mining system |
US8955919B2 (en) | 2010-03-05 | 2015-02-17 | Vermeer Manufacturing Company | Dust suppression arrangement for heavy excavation equipment |
CN112080996A (en) * | 2020-10-13 | 2020-12-15 | 泗阳众力道路标线涂料有限公司 | Road marking removing equipment |
US11339542B2 (en) * | 2017-11-29 | 2022-05-24 | Art En Reno Bvba | Device and method for processing a surface |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4405177A (en) * | 1981-04-17 | 1983-09-20 | Y K Trading Kabushiki Kaisha | Apparatus for finishing surfaces |
US4762371A (en) * | 1983-10-14 | 1988-08-09 | Econ Group Limited | Road planning equipment |
US6786556B2 (en) * | 2002-01-07 | 2004-09-07 | Joseph E. Due | Concrete grinder apparatus |
-
2003
- 2003-12-11 US US10/735,493 patent/US20050127741A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4405177A (en) * | 1981-04-17 | 1983-09-20 | Y K Trading Kabushiki Kaisha | Apparatus for finishing surfaces |
US4762371A (en) * | 1983-10-14 | 1988-08-09 | Econ Group Limited | Road planning equipment |
US6786556B2 (en) * | 2002-01-07 | 2004-09-07 | Joseph E. Due | Concrete grinder apparatus |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8955919B2 (en) | 2010-03-05 | 2015-02-17 | Vermeer Manufacturing Company | Dust suppression arrangement for heavy excavation equipment |
US9587373B2 (en) | 2010-03-05 | 2017-03-07 | Vermeer Manufacturing Company | Dust suppression arrangement for heavy excavation equipment |
US20130038113A1 (en) * | 2010-05-10 | 2013-02-14 | Norihide Wakita | Underwater miner cutter head, underwater miner, and underwater mining system |
US8960808B2 (en) * | 2010-05-10 | 2015-02-24 | Mitsubishi Heavy Industries, Ltd. | Underwater miner cutter head, underwater miner, and underwater mining system |
US11339542B2 (en) * | 2017-11-29 | 2022-05-24 | Art En Reno Bvba | Device and method for processing a surface |
CN112080996A (en) * | 2020-10-13 | 2020-12-15 | 泗阳众力道路标线涂料有限公司 | Road marking removing equipment |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10378179B2 (en) | Trenching system | |
US10993389B2 (en) | Stump grinder with laterally offset grinding arm operated by single joystick | |
US4642976A (en) | Lawn mower trimmer and edger attachment | |
EP0976872B1 (en) | Planer with edge planing capability | |
US6487838B2 (en) | Mower and string trimmer combination | |
US20030074873A1 (en) | Brush cutter emergency stop system | |
US11910745B2 (en) | Mower deck with actuated blade housings | |
WO2006031415A1 (en) | Floating attachement linkage | |
US20230243114A1 (en) | Ride-On Roadway Maintenance Machine | |
US7150300B1 (en) | Disc-type stump grinder | |
US20050127741A1 (en) | Grinder vehicle for removing traffic markings | |
US20060078384A1 (en) | Pavement marking remover with/for skid steer tractor | |
US5263769A (en) | Apparatus for planing a paved surface | |
US3979827A (en) | Tree cutting attachment for power mowers or the like | |
US3334429A (en) | Power unit and implement attachment | |
JP2561848Y2 (en) | Hand-held edger | |
US20020195869A1 (en) | Single arm support apparatus for a rockwheel | |
US20080196372A1 (en) | Cutting Unit with Moveable Groomer | |
GB2150620A (en) | Road surface cutting machine | |
JP2003259703A (en) | Hydraulic lifting and lowering apparatus for tractor | |
JP3321879B2 (en) | Powered vehicle | |
JPH025683Y2 (en) | ||
JPH076746Y2 (en) | Brush cutter | |
JP2004024070A (en) | Power vehicle | |
JPH0654615A (en) | Mowing apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JC ENTERPRISES AND MANUFACTURING, CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAVEY, JOHN R.;FULOP, CSABA;REEL/FRAME:014800/0637 Effective date: 20031211 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |