US3217620A

US3217620A - Roadway maintenance apparatus

Info

Publication number: US3217620A
Application number: US145700A
Authority: US
Inventors: Kenneth H Mindrum; Cyril B Rogers
Original assignee: Clark Equipment Co
Current assignee: Doosan Bobcat North America Inc
Priority date: 1961-10-17
Filing date: 1961-10-17
Publication date: 1965-11-16
Anticipated expiration: 1982-11-16

Description

1965 K. H. MINDRUM ETAL 3,217,620

ROADWAY MAINTENANCE APPARATUS Filed Oct. 1'7, 1961 6 Sheets-Sheet 1 INVENTORS KENNETH H. MINDRUM CYRIL B. ROGERS ATTORNEY Nov. 16, 1965 K. H. MINDRUM ETAL 3,217,620

ROADWAY MAINTENANCE APPARATUS 6 Sheets-Sheet 2 Filed Oct. 17. 1961 ATTORNEY Nov. 16, 1965 K. H. MINDRUM ETAL 3,217,620

ROADWAY MAINTENANCE APPARATUS 6 Sheets-Sheet 3 Filed Oct. 17. 1961 \x IN V EN TORS V KENNETH H. MINDRUM BYCYRIL 5. ROGERS ATTOR NEY 1965 K. H. MINDRUM ETAL 3,217,620

ROADWAY MAINTENANCE APPARATUS Filed Oct. 17, 1961 6 Sheets-Sheet. 4

INVENTO'RS o KENNETH H. MINDRUM 9 CYRI L. B. ROGERS ATTORNEY 16, 1965 K. H. MINDRUM ETAL 3,217,620

ROADWAY MAINTENANCE APPARATUS Filed Oct. 17. 1961 6 Sheets-Sheet 5 INVENTORS d KENNETH H. MINDRUM h CYRIL B. ROGERS BYXKW ATTORNEY NOV. 16, 1965 K. H. MINDRUM ETAL 3,217,620

ROADWAY MAINTENANCE APPARATUS Filed Oct. 17, 1961 6 Sheets-Sheet 6 INVENTORS KENNETH H. MINDRUM CYRI L B. ROGERS ffwm ATTO RNEY United States Patent 3,217,620 ROADWAY MAENTENANCE APPARATUS Kenneth H. Mindrurn and Cyril B. Rogers, both of Battle Qreek, Mich, assignors to Clark Equipment Company, a corporation of Michigan Filed Oct. 17, 1961, Ser. No. 145,700 14 Claims. (Cl. 94--39) This invention relates to roadway maintenance apparatus and more particularly to a combination of such apparatus with a self-propelled vehicle which is capable of transporting both roadway repair material and the apparatus which is used for effecting the highway repair work.

The vehicle can be used for the maintenance and repair of highways, of numerous different compositions, there being no practical limitation on the highway being repaired with regard to its material of construction. It is anticipated however that roads which are constructed of asphalt, bitumen or macadam are roadways most likely to employ our invention. The roadway repair material which is generally used, but to which the invention is not necessarily confined, may consist of an aggregate which can be heated to keep it in condition for application.

It is anticipated that our invention will find its geatest use in repairing rutted highways since the preliminary repair and filling work can be done rapidly and by a single operator who can perform all of the functions necessary for filling and repairing roadway damage which results from cold weather and heavy usage. It is to be understood, however, that the invention is not limited to the correction of a particular type or location of roadway damage.

Numerous inventions have been proposed for speeding up the construction and repairing of highways and many of these proposals are made with a specific view toward reducing the number of personnel required for effecting the highwy repair or construction. Almost all of these machines, however, require a vehicle to be in motion during use, thus depriving the operator of a direct view of the highway portion to be repaired and since his attention is diverted by concurrent vehicle movement he cannot devote his entire effort to repair work and ignore for the time being any of the vehicle driving operations. It is thus impossible for the operator to make specific repairs with a high degree of care and attention and it is further impossible to localize repair work to a select area. It is an object of the present invention to provide a highway maintenance vehicle and apparatus which is capable of self-propulsion to an area requiring repairs and there performing numerous specific repair operations under direct surveillance of the operator, who can select the desired series of repair operations which will repair ruts, restore broken road shoulders, repair or replace cracked or fractured roadway portions and the like.

Since roadway damage does not occur uniformly and is characterized by separation of the damage over long distances, it is an object of the invention to provide a mobile self-propelled vehicle which can cover substantial distances and perform necessary repair operations wherever required, thus making it possible to speed up the repair operation and also to reduce the capital equipment requirements since a single one of these units, constituting our invention, can cover a greater range of highway.

It is well known that repair work on highways such as filling ruts is often performed by time consuming and expensive hand operation procedures in which crews of men are involved. It is the object of the present invention to replace these crews with a single operator who can operate a vehicle which transports the apparatus, provides the power requirements for the apparatus and the controls for said apparatus, and transports road repair material and the operator, with this total system so arranged that the operator can both drive the vehicle and operate the apparatus tools which will prepare the rut for filling, fill the rut to grade, tamp the filled material, and thereafter sweep away the residue. All of these operations take place within the full view of the operator who can therefore skillfully perform these operations. It is possible as a result of the foregoing to economize on road repair operations by replacing a four to five man crew with a single operator who can cover greater distances, repair the roadway faster and effect said repair with a more durable restoration.

In the event that numerous chucks, ruts and the like need to be repaired at a given general locale, it is possible to bring the vehicle to a given location and while it is stationary, perform numerous repair operations at the same setting of the vehicle by means of novel extending, retracting and transverse displacements of a boom which is carried by the vehicle so as to locate the tool or tools in their proper functional positions, all of this being within the full view of the operator who is free to effect his repair work without the distraction which would otherwise accompany steering a moving vehicle. Another object of the invention is to provide a novel road material storage and transporting device which is operable completely under the direction of the repairman 1110 can direct a proper quantity of road repair material to a preselected location on the highway and thereafter tamp it in place to provide a permanent restoration. Since it frequently happens that ruts occur in clusters, which are one close to the other, it is possible to perform a series of repairs all at the same stationary location of the vehicle, thus greatly speeding up the highway maintenance operations.

It is an object of the present invention to provide embodiments for manipulating by power means, all of which are under the operators control, the road repair tools which are used in effecting road repairs.

Other objects of the invention will become apparent from a consideration of the following description which proceeds with reference to the accompanying drawings, wherein:

FIGURE 1 is an isometric view of a road maintenance vehicle incorporating one embodiment of our invention therein;

FIGURE '2 is a side elevation view of the vehicle shown in FIG. 1 looking in the direction of the cab side of the vehicle;

FIGURE 3 is a plan view of the vehicle illustrated in FIG. 2 and shows in dotted line positions the fully extended positions of the boom which is also movable within limits through an arcuate travel, to provide an area range Within which repair work can be done from a given stationary position of the vehicle;

FIGURE 4 is an isometric view of a second road maintenance vehicle incorporating a different embodiment of our invention;

FIGURE 5 is a side elevational view of the vehicle illustrated in FIG. 4 and looking at the side adjacent the viewer in FIGI4; and

FIGURE 6 is a plan view of the vehicle illustrated in FIG. 4, showing in dotted lines the maximum extended boom position and its range of arcuate travel to illustrate the repairable area at a given stationary position of the vehicle.

Referring now to the drawings, and particularly to the embodiment illustrated in FIGS. 1-3, the vehicle, designated generally by reference numeral 10, is powered by an engine 12 which is gasoline or diesel fuel powered however desired. Chassis 14 of the vehicle supports a cab 16 at one side thereof wherein the operator is located. Within the cab there is a steering wheel 18 to operate the front wheels 19 and a series of other control means in the form of foot pedals, hand controls, push buttons and the like (not shown), to control movement of the vehicle and repair apparatus in general. The ehassis 14 includes a bed 20 with a movable platform 22 mounted on rollers 24 which are received within tracks 26 and support the platform 22 for slidable movement in the directions of the double arrow-headed line in FIG. 1 by means of the power cylinder 28, which is fastened through a pivotal connection 3t) with the bed 20 and at the opposite end 32 is secured to platform 22. The power cylinder 28 is a double acting hydraulic power cylyinder so that the platform 22 is urged forwardly or retractively as desired. Of course, the operation of the power cylinder 28 is under control of the operator in some suitable manner by either electrical or hydraulic means however convenient, and the specific control is not a part of the present invention.

There is mounted on platform 22 a bin 34 for receiving a suitable highway repair material such as a bitumihous aggregate mixture which can be heated, if necessary, during transport to maintain the necessary fluidity of mixture. The sides of the bin 34 are substantially perpendicular or are inclined at a sufficiently steep angle so that the material tends to drop to the bottom of the bin where it is dropped through opening 36 having a guide chute 38 which leads into a channel boom 40 having a helical screw flight 42 which advances the aggregate and discharges it through opening 44 of the channel boom 40, the opening 44 being locatable over the roadway fault which is to be repaired. A continous supply of repair material is fed to the outlet opening 36 in the bin by means of a second helical screw flight 46 having reverse

screw flight sections

47 and 47 with an open section immediately over opening 36 so that material is continuously fed thereto from opposite ends of the bin. Screw flight 46 is journaled at 48 and at drive motor 50 therefor and moves the material into the vicinity of opening 36 where it drops through the chute 38 which registers with an opening in the upper side of boom 40 to conduct the repair material to screw flight 42. Screw flight 42 can be powered from the motor 12 by a suitable gear train (not shown) which is continuously or intermittently operated with motor 50 under the control of the vehicle operator to provide a flow of repair material at an appropriate time and in an appropriate amount.

The boom 40 is supported at its projected end 52 (FIGS. 2-3) by means of a depending strut 54 having rollers 56 movable within an arcuate track 58, which is supported from the forward end of movable platform 22, thereby permitting tools 60 carried at the end of the boom 40 to be moved through a limited arcuate travel which is illustrated by the dotted line positions in FIG. 3.

The tools which are mounted at the end of the boom include a router 62 which is raised and lowered by operator controlled double-acting hydraulic power cylinders 64 and is rotated by a fluid motor 66 which elfects turning of the head 68 causing the blades 70 to rout out loose pavement material before the aggregate is dumped therein. The router blades are designed to undercut as well as to clean the edges of the hole in the road surface. In this manner the patch or repair material is mechanically locked in the hole as well as cemented in. The router also removes the loose edges so that a mechanical locking in of the repair material is effective in a manner similar to that by which a dentist locks in the filling in a tooth. The router 62 comprises telescopic cylindrical members 72, 74 which permit the blades to be raised to transport position while the vehicle is moving and lowered to a functional position when the routing operation is to be performed.

Another tool carried at the end of the boom is a tamper in the form of a roller 76 which is journaled on a bracket 78 (FIG. 1), the bracket 78 having a vertical shaft er pin 80 which is carried by arm 82, secured to collar 84 which is hinged at 86 to gusset plates 88 which form a fixed part of the boom 40. The collar 34 is rotated to the raised transport position shown in FIGS. 1 and 2 by means of a hydraulic lift cylinder t) until stop 92 engages companion stop 94 and when the lift cylinder is operated it will permit angular movement of collar 34 in the manner indicated by dotted line (FIG. 2) allowing roller 76 to be lowered until it engages the aggregate. The roller is weighted at the interior thereof to provide eccentric turning action; a hydraulic or electric motor 93 is mounted on an extension of bracket 78 and effects turning of roller 76 about its journal in bracket '78, while another motor 93' is mounted on arm 82 for pivoting the roller and bracket 72% about pin 80 to obtain desirable tamping action on the aggregate.

Before aggregate material is discharged into the routed opening, it is cleared of all loosened debris by a blast of air from an air pressure line 96 which injects air under pressure within the opening to clear out all loose aggregate which is broken up by the routing blades 70. Line 96 is adapted to be supplied by an engine driven air compressor 97 under control of the operator, it being connected to boom 40 for inward and outward movement therewith.

When the road repair operation is completed, a swee er is lowered to grade level and then the vehicle passes over the repaired area so that the sweeper will brush away any loose material thereby completing the repair operation. The sweeper 95 is disposed at an angle to the longitudinal axis of the truck so that the loose material is swept toward the curb or shoulder side of the street and is driven in rotation by separate hydraulic or electric motor means 99 (FIG. 3) mounted at one end of the sweeper brush. A double-acting hydraulic cylinder 100 is pivotally connected to the chassis at 101 (FIG. 3) and to the sweeper at 102. The sweeper is pivotally -supported from chassis mounted bars 102 at 102 by brackets 103 (FIG. 3). Extension and retraction of cylinder 1% lowers and raises the sweeper to operative and inoperative positions, respectively, about pins 102".

In operation, the operator can perform all of the to be described operations without leaving the cab 16 and alighting from the vehicle. The driver of the vehicle simply drives to the site of highway damage and stops the vehicle in the vicinity of the damage so that by proper manipulation of the boom 40, he can bring the tools into operation at the location of highway damage to effect the necessary repairs. This means that the vehicle should be driven to a point where the damage is within a certain area circumscribable by the limits of longitudinal and transverse movements of the boom 40 (FIG. 3). All of the repair work, being in advance of the vehicle, 1s in full view of the operator so that he can carry out the repair operations to the extent necessary and he is able to see if the repair work is proceeding satisfactorily so that the repair can be corrected, repeated or modified, however necessary, to produce satisfactory results.

Once the vehicle It? is stopped, the operator actuates power cylinder 28 to effect longitudinal movement of the platform 22 and he further actuates a power cylinder 104, which is pivotally connected as shown to the platform at 105 and to the boom at 106, to effect arcuate movement of the boom 4t) in track 58 so that a composite of these movements will locate the router 62 over the area of highway damage. The hydraulic power cylinders 64 are then actuated to lower the blades 70 into the area of damage and motor 66 then effects rotation of the blades 70 to rout out the opening. Cylinders 64 then lift the blades 70 and head 68 to a transport position and motor 66 is deactuated. A blast of air from line 96 then clears the opening and

flights

46 and 42 are actuated consolidation of the aggregate) fixing said aggregate in place within the opening.

All of these operations take place when the vehicle is stationary and under direct surveillance of the operator who can make the necessary adjustments and changes in the operation of the router, the air blast, aggregate delivery and tamping which is best suited for correcting a particular item of highway damage.

When the tamping is complete, the lift cylinder 5N) raises the roller 76 to a transport position, motor 93 is deactuated and the vehicle is now ready to resume travel to the next area of highway damage. Before the vehicle leaves the area, however, the sweeper @5 is lowered by cylinder 1G9, actuated by motor 99, and is then passed over the repaired highway to sweep loose aggregate toward the shoulder side of the highway; the sweeper is then raised and the vehicle moves on at transport speed.

Referring next to the embodiment shown in FIGURES 4-6, the vehicle, designated generally by reference numeral 110, includes a cab 112 supported on a turntable 114 for rotatable movement on chassis 116.

The mobile vehicle 110 is self-propelled by a rear engine 118 which is gasoline or diesel fueled, and is appropriately geared with rear wheels 1211. The vehicle carries a bin 122 with vertical side 124 and sloping sides 126 which direct the flow of aggregate downwardly to the bottom of the bin 122 where there is an outlet 128 opening into a tube 130 having an engine driven screw flight 132 therein which conveys the aggregate upwardly and forwardly in the direction of the solid line arrow (FIG. 5). Channel 136 is relatively fixed and it discharges the flow of aggregate through an opening 133 at the end thereof.

Projecting forwardly of the vehicle is a telescopic boom 134 having at its forward end a plurality of tools 136 including a router 138, a bucket 140 for receiving aggregate and discharging it where required, and a tamper 142. Inner telescopic boom member 151 is extendible longitudinally of boom 134 by a power cylinder 144, which is secured through lug 147 and bolt 149 to boom 134 and to boom member 151 by a slip collar 152. The inner telescoping member 151 is rotatable about its longitudinal axis to position one or the other of the

tools

133, 149 or 142 in operative position. Rotation of member 151 may be accomplished manually or, if desired, by suitable hydraulic motor means which may be mounted at 153 on the end of boom 134 and connected to member 151 by a splined drive shaft to rotate same.

As in the previous embodiment, vehicle 1111 is driven into proximity to highway damage; it is then stopped and the tools are brought into operation by a combination of extendible movement of boom member 151 by the power cylinder 144, turning movement about a vertical axis of the cab 112, boom 134 and tools 136 on the turntable 114, and rotation of the tools about a horizontal axis with telescoping member 151. All of these operations are controllable by the operator with suitable control devices accessible to him. Since all of the repair work takes place in advance of the cab 112 and is under visual inspection and surveillance by the operator, it is at all times possible to make the necessary adjustments and changes necessary for a particular item of highway damage. It is advantageous to perform the highway repair work while the vehicle 110 is stationary since the drivers attention can be fixed only on the repair work itself.

The turntable 114 is operable by means of a ROTAC TORQUE ACTUATOR, not shown, this being a device manufactured by Ex-Cell-O Corporation. A model of this actuator, suitable for our purpose is HN/ROTAC Journal Bearing Type Actuator described in Catalogue Number 26282 page 6 published by Ex-C'ell-O Corporation. It should be understood that a specific torque actuator is not critical to the invention. A smaller actuator unit of the above type may be used at 153 for rotating tools 136 through boom member 151.

When the vehicle is not performing any repairs, the tools are all retracted to a transport position such as shown in FIG. 4; the particular angular position of the tools is not important, i.e., any one of the tools can be in its functional position. Ordinarily, the boom memher 151 is retracted to its fully telescoped position and the turntable 114 is actuated to bring the cab 112 to a position wherein the driver faces full ahead. The vehicle as it is shown in FIGS. 4, 5 and 6 is in a transport condition, at which time the driver operates the vehicle as a conventional vehicle. The front wheels 1511 are steerable by a steering wheel 174 by which the driver can direct the vehicle along the highway to the site of highway damage for repair operations which will be described next in full.

In operation, the vehicle 116 is driven to the location of highway damages and is then stopped short so that a combination of extendible and arcuate movements of the boom 134 will bring the

tools

138, and 142 into their operative positions. The composite movement is effected by operator-controlled actuation of power cylinder 144 and the torque actuator associated with turntable 114. The boom 134 is retracted and bucket 140 is brought to an angular position to receive from the end 133 of channel 131 a flow of aggregate material by actuation of screw flight 132 which the operator discontinues once the bucket 141i is filled.

The boom 134 is then extended, swung arcuately, and telescoping member 151 rotated, thereby bringing into position a selected one of the tools in surmounting relation with the damaged highway. In case of damage, such as a rut or the like, the first operation is to rout out the rut so the tools are rotated with boom member 151 to first locate the router 138 in position. The operator then actuates power cylinder 154 to lower head 156 and the motor 152'; is actuated to turn the blades 160 which tear loose the weakened highway material within the damaged area. When the routing is completed, the head 156 is raised by power cylinder 154 and motor 158 de-actuated. The tubular member 151 is then actuated to rotate the tools in the direction indicated by the arrow in FIG. 4 so that the bucket 140 containing its charge of aggregate overlies the routed highway area. The actuator piston cylinder 162 is operated to open bottom door 164 of the bucket and allow the aggregate to drop out in its designated place. The power cylinder 162 is then reversed to close the bottom door 164, telescoping member 151 is again turned in the direction of the arrow to bring tamper 142 over the aggregate and double-acting cylinder motor 166 is energized to reciprocate the inner cylinder 168 thereby pounding the aggregate with plate 170 which efiects consolidation of the aggregate.

From the stationary position of the vehicle, these repair operations can be carried out for any highway fault located within the area bounded by the limits of arcuate and extendible movement of the boom 134.

When the repair operations are completed, the tools are retracted to transport position and the boom 134 is fully telescoped. Vehicle 1111 then is driven over the repaired area with the sweeper 172 lowered to brush away loose aggregate material, generally displacing it toward the side of the road. Sweeper 172 is mounted on a turntable ring gear 176 by suitable pivoted brackets 178, said gear being rotatable by means of a hydraulically actuated rack 1811i in mesh with the gear. A cylinder actuator 182 is pivotally connected to the ring gear and to the sweeper at 184 and 186 to raise and lower the sweeper relative to the road in any angular position thereof. The sweeper 172 is actuated in rotation by a motor 190 which is drivably connected to sweeper 172 by a belt and pulley or similar arrangement.

All of the highway repair operations are performable, except the sweeping operation, within full view of the operator who can make the necessary refinements of adjustments to provide the best possible repair work. In this second embodiment it will be noted that the operator continuously faces in the same forward direction relative to tools 136 inasmuch as the cab 112 and tools are rotatable together on turntable 114. The advantages of this embodiment are substantially the same as for the previous embodiment and it is particularly advantageous to adopt the second embodiment when it is desired to employ pneumatic actuators rather than hydraulic actuators.

The power for the router tamper, actuator, screw flight, etc. may be provided by pneumatic pressure obtainable from a compressor (not shown) which is driven from a power take-otf transmission. The capacity of this compressor is comparable to that required for conventional pavement breakers and the like. Without wishing to be limited by specific reference to a compressor size, one having a capacity of 125 cubic feet per minute is satisfactory.

While the present invention has been illustrated in connection with the two exemplary embodiments, it will be understood that these are illustrations and are in no sense restrictive of the invention. It is reasonably to be expected that those skilled in these arts can make numerous adaptations of the invention to suit individual design requirements and it is intended that such revisions and adaptations as incorporate the principles of our invention will be included within the scope of the following claims as equivalents thereof.

We claim:

1. A self-propelled road repair vehicle comprising an operators station, a mounting member means mounting said mounting member on said vehicle for movement both longitudinally and laterally thereof to have when the vehicle is stationary an ambit defined by its longitudinal and lateral movements, a plurality of road repair elements adjustably mounted on said mounting member for positioning thereby at a road surface cavity within said ambit and visible in all positions thereof from said station, positioning means including said mounting member for sequentially disposing said repair elements in the respective operative positions thereof, a storage hopper mounted on the vehicle for transporting road patching material, means extending from said hopper for conveying patching material therefrom to such cavity, and respective motive means for operating said mounting member, repair elements, and conveying means in stationary condition of the vehicle, said repair elements including a routing implement for trimming such cavity before delivery of patching material thereto and a tamping implement for packing and leveling patching material delivered to the cavity.

2. A vehicle as defined in claim 1, in which said tamping implement comprises a roller mounted to rotate on a horizontal axis and to swivel on a vertical axis, means for rotating said roller, and means for swivelling the roller, whereby to achieve effective packing and leveling of patching material without vehicle movement.

3. A vehicle as defined in claim 1, in which said repair elements also include a cleaning implement comprising means operable before said delivery of patching material for injecting fluid under pressure into the cavity for removal of loose particles.

4. A vehicle as defined in claim 1, in which said routing and tamping implements are mounted substantially radially of the axis of reciprocation of said mounting 8 member for rotation about said axis in angularly spaced relation to each other, and which vehicle includes means for rotating said implements in a preselected direction about said axis to the respective operative positions thereof in sequence determined by said direction of rotation.

5. A vehicle as defined in claim 1, in which said conveying means comprises a container for a charge of patching material mounted for movement to a materialdelivery position in the interval between said sequential disposition of the routing and tamping implements in their operative positions, and means for operating said container to effect delivery of said material to the cavity between the sequential implement disposition.

6. A self-propelled road repair vehicle comprising an operators station at the forward portion thereof, a carrier member mounted on said vehicle and reciprocable longitudinally thereof, a storage hopper for road patching material mounted on said carrier member and having a discharge opening, a mounting member extending forwardly of said station and pivoted on the carrier member to swing about a vertical axis extending through the discharge of said hopper, a plurality of road repair elements adjustably supported on the forward end of said mounting member for full visibility in all positions thereof from the operators station, means for moving the carrier member and means for pivoting the mounting memher to adjust the positions of the repair elements relative to the vehicle in immobile condition for locating the elements at a selected road repair point within the ambit of the carrier and mounting member, conveyor means extending from said hopper discharge opening to adjacent said repair elements for conveying patching material to such road repair point, means on the vehicle for adjusting the repair elements to respective operating positions on the mounting member, and means for operating the repair elements, said repair elements including a cutting implement for trimming a cavity in the road surface, and a tamping implement for packing and leveling patching material applied to such cavity.

7. A self-propelled road repair vehicle comprising an operators station at the forward portion thereof, a storage hopper mounted on the vehicle for transporting road patching material and having a discharge opening, conveyor means extending from said discharge opening to a delivery point forward of and visible from said operators station for conveying patching material to a road repair point, means extensible and retractable forwardly and rearwardly relative to said delivery point, means mounted on the vehicle for rotation in a generally horizontal plane and mounting thereon said station, conveyor means, and extensible and retractable means, a plurality of road repair elements, means mounting said repaid elements on said extensible and retractable means for rotation about an axis extending in the direction of movement of the extensible and retractable means, means for rotating and repair elements about said axis, means for operating said repair elements, means for operating the extensible and retractable means and means for rotating said rotatable means, to adjust the position of the repair elements in stationary condition of the vehicle for location thereof at a road repair point within the ambit of the extensible and retractable means, and means for driving said conveyor means, said repair elements including a rounting implement for trimming a cavity in the road surface, a tamping implement for packing and leveling patching material applied to such cavity, and a container for receiving patching material at said delivery point and discharging the material into the cavity, said routing and tamping implements being angularly related about said axis and said container being disposed between said implements.

8. Apparatus for use with a road maintenance vehicle, comprising a tool mounting member adapted for operative connection to an operator-controlled angularly movable portion of said vehicle and including a plurality of telescoping elements, operator-controlled means for effecting extension and retraction of said telescoping elements, a plurality of tools mounted at one end of said mounting member substantially radially of the longitudinal axis of the telescoping elements in rotatable relation to said axis and in angular relation to each other, operator-controlled means for effecting successive rotation of said tools about said axis in a predetermined direction for dis posing the tools sequentially in the respective operative positions thereof at a road repair point, power means for operating the tools in said operative positions thereof, means for carrying road repair material on the vehicle, and means extending from said material-carrying means for discharging road repair material at said repair point between disposition of said router and said tamper in their respective operative positions.

9. Apparatus as defined in claim 8, in which said means for discharging repair material comprises a container mounted on said one mounting member end and disposed between said router and tamper and operable to deposit repair material at said repair point before movement of the tamper to operative position.

10. Apparatus as defined in claim 9, in which said container includes closure means for preventing deposit of said charged material therefrom, and means for opening said closure means to allow such deposit.

11. A self-propelled road repair vehicle comprising support means on the vehicle, means affording rectilinear reciprocation and arcuate movement of said support means in a horizontal plane, a plurality of repair tools mounted on said support means for positioning thereby at a road repair point spaced from the vehicle within the ambit of the support means with the vehicle stationary, a storage hopper mounted on the vehicle for transporting road patching material, conveyor means extending from said hopper for delivering patching material from said hopper to such repair point, means including the support means for bringing the tools to their respective operative positions in predetermined sequence, and respective means for operating the support means, conveyor means, and tools, said tools including cutting means for trimming a road surface defect at a repair point before delivery of patching material thereto and tamping means for packing and leveling the delivered patching material.

12. A vehicle as defined in claim 11, in which said tools include an implement for cleaning loose particles from the cavity, and means for operating said cleaning implement before said operative positioning of the tamping means.

13. A self-propelled road repair vehicle comprising a repair tool support including a rectilinearly reciprocable end portion, means mounting said support on said vehicle for arcuate movement in a horizontal plane, a plurality of repair tools mounted on said reciprocable end portion of the tool support disposable thereby at a road repair point within the ambit of the support with the vehicle stationary, a storage hopper mounted on the vehicle for transporting patching material, means extending from said hopper for conveying patching material therefrom to a delivery point adjacent the reciprocable end portion, said conveying means being pivotally mounted for arcuate movement with the tool support, means for bringing said tools to their respective operative positions at the repair point in predetermined sequence, said tools including cutting means for trimming a road surface defect at such repair point before delivery of patching material thereto and tamping means for packing and leveling road patching material disposed in such cavity, and respective means for operating said tool support, tools, and conveying means.

14. A vehicle as defined in claim 13, in which said conveying means include a container for a charge of patching material to be applied to the cavity operable in sequence between said cutting and said tamping means.

References Cited by the Examiner UNITED STATES PATENTS 1,523,084 1/1925 Scheunemann 94-44 X 1,864,612 6/1932 Pearson et a1. 94-44 1,924,825 8/1933 Young 94-44 X 2,251,013 7/1941 Donley et a1. 175-174 2,386,025 10/1945 Wills 94-50 2,426,507 8/1947 Inksettcr 37-189 X 2,684,159 7/1954 Oldenkamp 212- 2,752,141 6/1956 Silvestri -201 X 2,839,067 6/1958 Wilkinson 212-55 X 2,854,217 9/1958 Benjamin 173-26 X 3,072,025 1/ 1963 Cronin 94-50 OTHER REFERENCES Colorado Highways Publication, September 1925, page 8.

CHARLES E. OCONNELL, Primary Examiner.

JACOB L. NACKENOFF, BENJAMIN BENDETT,

RICHARD W. COOKE, JR., Examiners.

Claims

1. A SELF-PROPELLED ROAD REPAIR VEHICLE COMPRISING AN OPERATOR''S STATION, A MOUNTING MEMBER MEANS MOUNTING SAID MOUNTING MEMBER ON SAID VEHICLE FOR MOVEMENT BOTH LONGITUDINALLY AND LATERALLY THERETO TO HAVE WHEN THE VEHICLE IS STATIONARY AN AMBIT DEFINED BY ITS LONGITUDINAL AND LATERAL MOVEMENTS, A PLURALITY OF ROAD REPAIR ELEMENTS ADJUSTABLY MOUNTED ON SAID MOUNTING MEMBER FOR POSITIONING THEREBY AT A ROAD SURFACE CAVITY WITHIN SAID AMBIT AND VISIBLE IN ALL POSITIONS THEREOF FROM SAID STATION, POSITIONING MEANS INCLUDING SAID MOUNTING MEMBER FOR SEQUENTIALLY DISPOSING SAID REPAIR ELEMENTS IN THE RESPECTIVE OPERATIVE POSITIONS THEREOF, A STORAGE HOPPER MOUNTED ON THE VEHICLE FOR TRANSMITTING ROAD PATCHING MATERIAL, MEANS EXTENDING FROM SAID HOPPER FOR CONVEYING PATCHING MATERIAL THEREFROM TO SUCH CAVITY, AND RESPECTIVE MOTIVE MEANS FOR OPERATING SAID MOUNTING MEMBER, REPAIR ELEMENTS, AND CONVEYING MEANS IN STATIONARY CONDITION OF THE VEHICLE, SAID REPAIR ELEMENTS INCLUDING A ROUTING IMPLEMENT FOR TRIMMING SUCH CAVITY BEFORE DELIVERY OF PATCHING MATERIAL THERETO AND A TAMPING IMPLEMENT FOR PACKING AND LEVELING PATCHING MATERIAL DELIVERY TO THE CAVITY.