United States Patent (19)
`
`Barton
`
`54) ROADWAY PAVEMENT PLANING
`MACHINE
`75 Inventor: Robert M. Barton, Oklahoma City,
`Okla.
`73 Assignee: Barco Manufacturing Company,
`Oklahoma City, Okla.
`21 Appl. No.: 942,618
`22 Filed:
`Sep. 15, 1978
`
`63
`
`Related U.S. Application Data
`Continuation of Ser. No. 784,556, Apr. 4, 1977, aban
`doned.
`51) int. C.’.............................................. EOC 23/12
`52 U.S. C. ........................................ 299/39; 299/89;
`404/90
`58 Field of Search ....................... 404/75, 84, 90,91,
`404/98; 299/39, 89 -
`References Cited
`U.S. PATENT DOCUMENTS
`... 299/89
`8/1957 Bradley .....
`2,801,838
`299/89
`2/1967 Christensen
`3,306,669
`404/9 X
`7/1969 Hanson ......
`3,452,461
`... 299/39
`9/1971 Walker.
`3,606,468
`... 299/39
`3,767,262 10/1973 Pentith.
`299/39 X
`3,888,542
`6/1975 Gowler ......
`... 404/91
`3,893,780
`7/1975 Gutman.
`4,029,165
`6/1977 Miller ..................................... 404/98
`
`(56)
`
`(11)
`45)
`
`4,186,968
`Feb. 5, 1980
`
`FOREIGN PATENT DOCUMENTS
`530654 7/1931 Fed. Rep. of Germany ............. 299/31
`Primary Examiner-William F. Pate, III
`Attorney, Agent, or Firm-McWilliams, Mann &
`Zummer
`ABSTRACT
`57
`A roadway pavement planing machine comprising a
`frame having forward and rearward ends, a pair of
`crawler drive assemblies disposed in side by side rela
`tion at the frame forward end upon which the frame
`forward end rests, with such drive assemblies being
`connected to the frame for independent vertical adjust
`ment of said frame relative to the respective forward
`drive assemblies, a drive assembly adjacent the frame
`rearward end on which the frame rearward end rests
`and comprising a pair of crawler type drive assemblies.
`The rearward end drive assembly as a whole is con
`nected to the machine frame for movement of the frame
`about a horizontal axis extending longitudinally of the
`frame. The frame has a planing cylinder journaled on
`same that extends crosswise of same and is disposed for
`planing engagement with the pavement, with the plan
`ing cylinder being disposed intermediate the frame for
`ward and rearward ends and having external surfacing
`including gouging cutting studs for fragmenting the
`pavement in planing same when rotated against the
`pavement surface.
`
`5 Claims, 14 Drawing Figures
`
`
`
`Page 1 of 14
`
`CATERPILLAR EXHIBIT 1023
`
`

`

`U.S. Patent
`
`Feb. 5, 1980
`
`Sheet 1 of 4
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`U.S. Patent Feb. 5, 1980
`
`Sheet 2 of 4
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`U.S. Patent Feb. 5, 1980
`
`Sheet 3 of 4
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`U.S. Patent
`U.S. Patent
`
`Feb. 5
`9
`Feb. 5
`
`1980
`1980
`
`Sheet 4 of 4
`Sheet 4 of 4
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`4,186,968
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`Page 5 of 14
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`Page 5 of 14
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`

`

`10
`
`ROADWAY PAVEMENT PLANING MACHINE
`This application is a continuation of my abandoned
`copending application Ser. No. 784,556, filed Apr. 4,
`1977.
`This invention relates to road pavement resurfacing
`machines, and more particularly to equipment for resur
`facing roadways that is especially adapted to remove a
`part or all of a roadway pavement for resurfacing or
`replacement purposes.
`In the highway maintenance field, in recent years
`several factors have emerged emphasizing the need for
`creative thinking to provide new ways and means of
`economically restoring riding quality and skid resis
`15
`tance to the surface of modern highway pavement,
`which normally is made up of either asphalt or con
`crete. The need for answers to these problems is high
`lighted by the realization by highway engineers that for
`various reasons pavement surfaces must be given atten
`20
`tion sooner than was originally anticipated. Thus, heavy
`traffic volumes and the use of studded tires are causing
`the now familiar "wheel path rutting' as well as aggre
`gate polishing with consequent rapid loss of skid resis
`tance. In addition, increasing numbers and load weights
`25
`of truck traffic have resulted in noticeably increased
`joint faulting and "washboarding'.
`With the increased emphasis on safety that has
`emerged in recent years, many state and local govern
`ments have established programs to detect and identify
`30
`roadways that have become hazardous due to deteriora
`tion of pavement surfacing in one way or another, due
`to factors such as those referred to above as well as
`others that may be the result of local conditions. Both
`the general public and state and local highway depart
`35
`ment officials now have an awareness that governing
`laws establish an obligation to provide good roadways,
`and in particular roadway pavement that is at least
`reasonably safe for the purpose of travel. Claims of
`parties injured as the result of skidding accidents are
`40
`finding response in the courts by way of large sums
`being awarded as compensatory and other damages.
`Heretofore the most frequent remedial maintenance
`procedure employed to restore highway pavement rid
`ing quality and skid resistance has been to overlay the
`45
`existing roadway pavement with asphalt. While this
`approach is a popular and effective way of correcting
`these problems, the economics involved and the energy
`shortage has caused the cost of asphalt to so drastically
`increase that costs of maintenance of this type are run
`50
`ning well ahead of available funds once thought ade
`quate for solving problems of this type. Furthermore,
`the public is becoming increasingly cost conscious and
`resistance to imposition of additional tax burdens that
`would normally be the source of much of the funding
`55
`needed to meet highway maintenance costs, which has
`created a serious dilemma in view of the fact that high
`way vehicle traffic continues to increase from year to
`year in spite of the energy shortage.
`It has become increasingly apparent that the usual
`approach of resurfacing pavement with asphalt, to cor
`rect pavement surfacing problems, will have to be seri
`ously curtailed because of the economic problems in
`volved alone. However, there are other practical prob
`lems involved, such as each time a roadway is resur
`65
`faced by using overlay procedures, the successive lay
`ers involved raise the height of the roadway, which has
`the result of interferring with natural drainage, fills up
`
`4,186,968
`2
`existing guttering, and in the case of underpasses re
`duces overhead room. Where overlaying is done across
`bridges, each overlay applied to the bridge adds to the
`dead weight that the bridge must carry with the result
`ing safety implications.
`Some thought has been given to other ways of effect
`ing correction of defective pavement surfacing. The
`sawing of grooves and grinding has proved successful
`on a limited basis, but both these methods are too expen
`sive to be used in other than special problem areas
`where they are best suited in view of special circum
`stances. The handling of pavement residue resulting
`from these procedures has been a problem and the re
`fuse involved has no salvageable value. Another ap
`proach that has been tried involves efforts to plane
`asphaltic surfacing by utilizing heater planing appara
`tus. This equipment is known to be dangerous and
`noisy, and unduly pollutes the atmosphere in use. As the
`procedures involved are concerned primarily with lev
`eling of the pavement surface and little if any of the
`material making up the defective pavement is re
`claimed, this type of equipment cannot be given much
`serious consideration as a real problem solver in this
`field.
`Serious consideration is now being given to try to
`find ways to recycle the materials making up roadway
`pavement, not only because of the increasingly higher
`costs of obtaining petroleum based products, but also
`due to the increasing scarcity of quality aggregates and
`increasing costs of transporting same from point of
`source to point of use including any processing as to
`grade or the like that may be involved.
`A principal object of this invention is to provide a
`pavement planing machine that, as it operates, effects a
`breaking up of the pavement surfacing that is being
`treated and providing for pick up and conveyance to
`waiting bulk material receiving vehicles the resulting
`pavement rubble that may then be suitably processed
`for recycling purposes.
`Another principal object of the invention is to pro
`vide a pavement planing machine of the type indicated
`that will handle both asphalt or concrete with facility
`while providing for good grade control for establishing
`the desired pavement surface grade and profile best
`suited for any given situation.
`Another important object of the invention is to pro
`vide a roadway planing machine of the rotary planer
`type that cuts a swath of eight feet or more across the
`width of the roadway at a single pass while providing
`for accurate grade control best suited for the desired
`riding condition to be obtained for a particular road
`way.
`Another important object of the invention is to pro
`vide a roadway pavement planing machine on which
`the planer drive is mounted for maximum efficiency of
`drive application, protection from working and atmo
`spheric conditions, and safety for those operating the
`machine.
`Yet other objects of the invention are to provide a
`roadway pavement planing machine that provides for
`maximum pickup of the resulting pavement rubble and
`conveying of same for efficient deposit in suitable
`pickup vehicles, while the planing type resurfacing
`action is performed by the machine.
`Still other objects of the invention are to provide a
`roadway pavement planing machine that removes some
`or all of the existing pavement for recycling purposes,
`that operates free of atmospheric and noise pollution,
`
`Page 6 of 14
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`10
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`15
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`25
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`3
`end 16, with the front end 14 being supported on a front
`and is economical of manufacture, and that is safe, reli
`drive assembly 18 and the frame rear end 16 being sup
`able, and long lived in operation.
`ported on a rear drive assembly 20.
`Other objects, uses, and advantages will be obvious
`The front drive assembly 18 comprises a pair of
`or become apparent from a consideration of the follow
`ing detailed description and the application drawings in
`crawler assemblies 22 and 24 connected to the forward
`end 14 of frame 12 through the respective hydraulic
`which like reference numerals indicate like parts
`cylinder devices 26 and 28 for pivotal movement about
`throughout the several views.
`the respective vertical axes 30 and 32 (see FIG. 3) as
`In the drawings:
`well as selective vertical adjustment of the frame for
`FIG. 1 is a diagrammatic perspective view, largely in
`ward end 14 with respect to the respective assemblies 22
`block diagram form, illustrating the basic arrangement
`of a roadway pavement planing machine arranged in
`and 24. The assemblies 22 and 24 are operably con
`nected together for vehicle steering purposes by steer
`accordance with the invention;
`.
`. .
`.
`FIG. 1A is a fragmental perspective view of the na
`ing mechanism 34.
`The rear drive assembly 20 comprises a pair of
`ture similar to that of FIG. 1 illustrating a modified
`crawler assemblies 36 and 38 connected together by
`form of the invention;
`yoke structure 40 that is pivotally connected to frame
`FIG. 2 is a side elevational view of the machine
`12 at its rear end 16 for pivotal movement about hori
`shown in FIG. 1, taken from the right hand side of the
`zontal axis 42 (see FIGS. 3 and 4). In the embodiment
`machine as shown in FIG. 1;
`FIG. 3 is a diagrammatic plan view of the machine
`illustrated, the yoke structure 40 includes shaft 44 fixed
`thereto which is journaled in frame 16 or pivotal move
`shown in FIGS. 1 and 2, showing only the main compo
`20
`ment about axis 42, which axis 42 extends longitudinally
`nents of the machine frame, the rotary planer, the ma
`of the frame 12, and in particular the direction of in
`chine crawler assemblies, the pavement rubble receiv
`ing conveyor, and associate parts;
`tended movement of the machine 10.
`The crawler assemblies 22, 24, 36 and 38 are suitably
`FIG. 4 is an end view of the machine as shown in
`powered or driven, as by employing conventional hy
`FIG. 2 taken from the right hand or rear end of the
`draulic drive motor equipment which provides for both
`machine as shown in FIG. 2;
`FIG. 5 is a plan view of the rotary planer as mounted
`forward and reverse movement of the vehicle.
`Intermediate the assemblies 18 and 20 frame 12 jour
`in the machine, with associated parts being partially
`nals planing cylinder or cutter drum 50 that extends
`broken away and shown in section and the planer drive
`transversely of the machine 10 and crosswise of the
`arrangement shown in phanton;
`intended direction of movement of same for planing
`FIG. 6 is an end view of the structure shown in FIG.
`engagement with pavement 52. The planing cylinder 50
`5;
`is journaled between hubs 54 and 56 respectively fixed
`FIG. 7 is a view similar to that of FIG. 6, but dia
`grammatically illustrating a sensing arrangement that
`to the sides 15 and 17 of the frame 12. In the specific
`arrangement illustrated, the planing cylinder 50 at ei
`may be employed in association with the machine for
`establishing and maintaining pavement surface grade as
`ther end of same is connected to the respective hubs 54
`and 56 by drive mechanism 58 (see FIGS. 5 and 8), that
`the machine is operated;
`in each instance, is connected to the planing cylinder at
`FIG. 8 is a showing of the left hand end of the struc
`60 and to the respective hubs at 62 (using suitable bolts
`ture shown in FIG. 5, with parts broken away and
`63 or the like for this purpose) for journaling the planing
`shown in section for better illustrating the planer
`mounting and driving arrangement in accordance with
`cylinder on frame 16. The respective drives 58 are
`driven by suitable hydraulic motors 64 to normally
`the invention;
`rotate the planing cylinder 50 in the direction indicated
`FIG. 9 is a view similar to that of FIG. 2 but with
`emphasis on the rear end of the machine and specifically
`by the arrow 66 of FIG. 2 when machine 10 is moved
`along the roadway being processed in the direction
`the conveyor assembly as arranged for conveying the
`45
`indicated by the arrow 65 of FIG. 2 for upcutting ex
`pavement removed by the machine to a waiting vehicle
`for recycling purposes;
`cisement of pavement 52 (note FIGS. 2 and 7). While
`FIG. 10 is a sectional view taken substantially along
`the direction of rotation 66 is the normal direction of
`rotation of the planer cylinder 50, it is preferred that the
`line 10-10 of FIG. 9;
`FIG. 11 is a sectional view taken substantially along
`drive 58 and the drive motor 64 therefor in each in
`stance be reversably operable at the option of the ma
`line 11-11 of FIG. 9;
`chine operator.
`FIG. 12 is a fragmental plan view of the machine
`adjacent one end of the planer, showing the modifica
`It will be observed that the journaling and drive ar
`rangement for planer cylinder 50 is housed thereby in
`tion of FIG. 1A in outline; and
`coaxial relation therewith for maximum efficiency of
`FIG. 13 is a fragmental view showing the cutter
`application and protection of the drive equipment in
`drum associated with a rotary brush arrangement.
`However, it should be distinctly understood that the
`volved.
`Operably associated with the planing cylinder 50 is
`specific drawing illustrations provided are supplied
`mold board 70 that forms a part of mounting assembly
`primarily to comply with the requirements of the Patent
`72 that includes a pair of mounting bars 74 and 76 that
`Laws, and that the invention is susceptible of modifica
`are fixed with respect to the mold board 70 and extend
`tions and variations that will be obvious to those skilled
`rearwardly thereof. The mounting bars 74 and 76 are
`in the art, and which are intended to be covered by the
`connected to frame 16 by the respective hydraulic cyl
`appended claims.
`inder devices 78 and 80 for vertical adjustment of the
`GENERAL DESCRIPTION
`mold board with respect to frame 12, devices 78 and 80
`being suitably resiliently connected to frame 12 for
`Reference numeral 10 of FIGS. 1, 2 and 9 generally
`adequate shock absorption purposes. Operably associ
`indicate a specific embodiment of the invention which
`ated with the respective mounting bars 74 and 76 are the
`comprises a frame 12 having a front end 14 and a rear
`
`35
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`50
`
`55
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`65
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`Page 7 of 14
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`processed, while the planing cylinder 50 is rotated in the
`respective vertical movement guidance devices 82 and
`direction indicated by the arrow 66 for upcutting plan
`84 (not shown in FIG. 1).
`The machine 10 includes conveyor assembly 90 that
`ing excisement thereof. The planing cylinder 50 has its
`projects upwardly and rearwardly thereof from mold
`side wall 57 equipped with gouging type cutters 59 of
`any suitable design arranged for gouging type pavement
`board 70 and comprises inner or lower conveyor assem
`bly 92 and outer or upper conveyor assembly 94. The
`break up action on the pavement when rotated there
`inner conveyor assembly 92 has its lower end 96 pivot
`against, and auger flanging or flighting 61 oriented to
`ally secured, as at 97, to the respective spaced apart
`feed pavement rubble broken up by the action of the
`mounting brackets 98 that in the form shown are fixed
`cutting devices 59 toward the mold board port 112, as
`to noid board 70, whereby the lower end 96 of the
`the planar cylinder 50 rotates in operation. Forward
`10
`conveyor assembly 92 is supported by mounting assem
`movement of machine 10 also induces a movement of
`bly 72 well forwardly of yoke structure shaft 44 and
`pavement rubble gathered by mold board 70 upwardly
`well below the level of its axis 42 (see FIG. 2). The
`of the mold board working face 71. Thus, pavement
`conveyor assembly 92 at its upper end 100 mounts canti
`rubble excised by planar cylinder 50 may move over the
`lever fashion the conveyor assembly 94 adjacent the
`top of cylinder 50 and into the working space 73 be
`inner end 102 of the conveyor assembly 94, the outer
`tween the cylinder 50 and mold board 70 where the
`end 106 of assembly 94, in the operating position of the
`auger action of flanging or flighting 61 on the broken up
`conveyor assembly 90, being disposed in the rearwardly
`pavement in space 73 centers such material for uniform
`and outwardly projecting relation suggested in FIG. 9
`flowing action through port 112 and onto conveyor
`for arranging the conveyor apparatus 90 to receive
`20
`assembly 92.
`beneath same a conventional highway dump vehicle
`As the machine 10 proceeds along the roadway, it is
`108 equipped with the familiar dump vehicle body 110
`steered by the operator standing at operating location
`adapted to receive from a conveyor assembly 90 bulk
`30, and using control panel 132 on which the various
`material conveyed thereby for discharge from machine
`controls for the various operating components of the
`D.
`-25
`machine are mounted for convenience of operation by
`Mold board 70 is formed with funneling port 112 for
`the operator. Pavement rubble proceeding through the
`receiving pavement rubble removed from pavement 52
`mold board port 112 drops onto conveyor assembly 92
`by the operation of planer cylinder 50, for deposit on
`that conveys it rearwardly and upwardly of frame 12
`conveyor assembly 92 which conveys the pavement
`under yoke structure shaft 44 and then through and
`rubble material in question to conveyor assembly 94 for
`30
`above the level of axis 42 to conveyor assembly 94 for
`discharge into the vehicle 108.
`further conveyance and deposit in a waiting vehicle
`Both the conveyor assemblies 92 and 94 are driven by
`108, which may, because of the particular arrangement
`drive mechanism 20 that is located at the ends 100 and
`of the conveyor assembly 90, follow along behind the
`102 of the respective conveyor assemblies 92 and 94.
`machine 10 and under conveyor assembly 90, while
`The conveyor assembly 94 is movable to the dashed line
`moving in a forward direction, and at speeds compara
`retracted position indicated in FIG. 9 by operating
`ble to the speed of the machine 10, for receiving the
`hydraulic cylinder assembly 122.
`pavement rubble from the discharge end of conveyor
`In operation, the machine 10 when located at the site
`assembly 94. The conveyor assembly 94 is preferably
`of the pavement to be planed or profiled, has its hydrau
`proportioned in length to have its discharge end 106
`lic cylinder devices 26 and 28 at its front end 14 adjusted
`extend well beyond the location of the vertical plane of
`to set the planing cylinder or cutter drum 50 at the
`the center of gravity of vehicles 108 of standard sizes.
`desired grade and slope for a planed pavement surface
`The operator of the vehicle 108 by appropriately con
`53 (see FIG. 7), as compared to the existing pavement
`trolling the speed of his vehicle relative to the speed of
`surface 55, drum 50 being operated as necessary to
`machine 10, may move the dump body 110 forwardly
`reach this setting relative to surface 55. The hydraulic
`and rearwardly of the conveyor assembly 94 to uni
`cylinder devices 26 and 23 are arranged for individual
`formly distribute the pavement rubble load along the
`operation independent of each other for selectively
`length of the dump body 110.
`positioning each side of the frame 12 relative to the
`In a preferred form of the invention, the planing
`respective drive assemblies 22 and 24 to set the planing
`cylinder 50 and cooperating mold board 70 are propor
`cylinder 50, relative to a suitable grade defining datum
`50
`tioned transversely of the machine 10 to provide a cut
`that has been conventionally established for the new
`ting swath approximating, but somewhat under, twelve
`pavement surface to be provided by the use of the ma
`chine 10. In making this setting of the planing cylinder
`feet (for instance 8.5 feet). In accordance with the in
`vention, a full twelve foot cutting swath is provided by
`70, the frame 12 of machine 10, at the rear end of the
`employing at either end of the planing cylinder 50 a set
`frame 12, merely pivots to one side or the other about
`of supplementary planing assemblies 140 (see FIGS. 1A
`axis 42.
`The hydraulic cylinder devices 78 and 80 are oper
`and 12).
`ated as the machine moves forwardly to dispose the
`Further in accordance with the invention, the ma
`chine 10, and in particular the frame 16 and components
`mold board 70 elevationally relative to the planing cyl
`it carries, is oriented and arranged so that the center of
`inder 50 for proper mold board positioning relative
`60
`gravity of the machine 10, indicated at 150 in FIG. 2, is
`thereto that will insure pickup of substantially all of the
`vertically located above and in substantial alignment
`rubble formed by the operation of planar cylinder 50.
`with the forwardly located margin of the planing cylin
`The conveyor assembly 90, and in particular the assem
`der 50, with the weight supported by the respective
`bly 94 thereof, is moved to its extended operative posi
`crawler assemblies 22, 24, 36 and 38 being substantially
`tion indicated by FIG. 9.
`65
`equal for each such assembly. This arrangement centers
`When the machine 10 is put into operation, the drive
`assemblies 22, 24, 36 and 38 move the machine 10 along
`and orients the weight of the machine, with respect to
`the right of way, over the pavement segment being
`cylinder 50, to best advantage to counter the upward
`
`45
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`forces acting on the planing cylinder 50 as the machine
`respective arms 207 of yoke 209 that is slidably mounted
`in the respective support guides 210 for vertical shifting
`10 moves in a forward direction, in operation.
`As the machine 10 operates, the pavement, whether it
`movement under the control of hydraulic cylinder de
`be asphalt or concrete, is planed or excised to the de
`vice 208 that is interposed between yoke 209 and frame
`sired grade and slope to provide a pavement surfacing 5
`member 211 fixed between brackets 202. The respective
`that is suitable for itself serving as highway traffic sur
`cables 206 have linking sections 206A and 206B con
`facing, or to which may be applied in any suitable man
`nected to the conveyor assembly where indicated at 213
`ner the new pavement material (which ordinarily would
`and 215. Extension and retraction of device 208 adjusts
`the angulation of the conveyor assembly 90.
`be asphalt). Pavement rubble removed by the machine
`10 is suitable for recycling, and for this purpose the
`The frame 16 underneath the operator's position 130
`location and spacing of the cutters 59 may be as desired
`is also arranged to provide an equipment module indi
`for achieving a particular aggregate size. The pavement
`cated by reference numeral 210 (see FIGS. 2 and 3) in
`rubble resulting is thus broken up to the proper gradia
`which the equipment for furnishing hydraulic pressure
`liquid to the respective hydraulic cylinder devices
`tion for use, the vehicles 108 being employed to take the
`newly formed aggregate material to a recycling center
`forming a part of machine 10 may be operably mounted
`for reuse. A large percentage of the pavement removed
`as part of the distribution of the mass of the frame 16 to
`from the roadway by the practice of the invention is
`achieve the indicated desired location of the machine
`useable for the indicated recycling purposes, with liquid
`center of gravity 150.
`asphalt and aggregate being added as needed.
`The crawler assemblies 22, 24, 36 and 38 may be of
`any suitable commercial type equipped with the usual
`SPECIFIC DESCRIPTION
`hydraulic drive motors 217 for effecting the application
`The frame 10 is basically only diagrammatically illus
`of forward and reverse driving movement to the usual
`trated as, generally speaking, its specifics may take any
`endless tracks 212 of the respective crawler assemblies.
`The hydraulic cylinder devices 26 and 28 are only
`suitable form. The frame is thus shown as being of rect
`angular configuration (see FIG. 3) involving suitable 25
`diagrammatically illustrated, as they may comprise any
`longitudinally extending members 160, 162, 164 and 166
`suitable hydraulic cylinder unit 220 comprising a suit
`integrated with suitable transverse frame members 168,
`able hydraulic cylinder 222 suitably anchored in frame
`16 in vertically disposed relation and reciprocably re
`170, 172, 174 and 176 to provide a basic subframe indi
`cated by reference numeral 178 that is of essentially
`ceiving ram 224 having ram head 226 operably mounted
`planar construction, to which suitable body plating or
`within cylinder 220 and shank 228 fixed to clevis struc
`the like is applied, as indicated at 180, 181, 182 and 183.
`ture 230 pivoted by suitable pins 232 to the frames (not
`An important aspect of the invention is that at the sides
`shown) of the respective crawler assemblies 22 and 24.
`of the machine 10, side plates. 180 and 182 be made part
`The rams 224 are received within the respective cylin
`of the frame 16, to which the respective hubs 54 and 56
`ders 220 for swiveling movement about the respective
`are respectively fixed. It is preferred that the side plates 35
`axes 30 and 32 (with which the respective rams 224
`coincide) under the steering operation of steering as
`180 and 182 in the areas of the hubs 54 and 56 be suffi
`ciently flexible laterally of the vehicle to provide suffi
`sembly 34, which comprises cross bar 236 pivotally
`cient flexture for proper operating self alignment of the
`connected as at 238 and 240, respectively, to the respec
`respective hubs 54 and 56 with respect to the planing
`tive clevis structures 230. Cross member 236 has fixed
`thereto as by welding a lever arm 250 pivotally con
`cylinder 50.
`.
`.
`As indicated in FIG. 2, the respective hubs 54 and 56
`nected to clevis 252 of hydraulic cylinder device 254
`have reinforcing plates 186 and 188 fixed to the respec
`having hydraulic cylinder 256 pivotally connected to
`tive plates 180 and 182 and extending between the re
`the frame 16 as at 258 and piston rod 260 operably and
`reciprocably mounted therein to which the clevis 252 is
`spective hubs and frame 178 (on the inside surfaces of
`the plates 180 and 182), for reinforcing and supporting 45
`suitably affixed.
`purposes. A forward pavement rubble retainer plate 187
`As to the rear drive assembly 20, the yoke structure
`is disposed adjacent to and forward of cutter drum 50
`40 comprises a fabricated yoke 270 having a shank 272
`(to keep the pavement adjacent drum 50) by being suit
`equipped with a clevis structure 274 at either end
`ably secured between the frame side plates 180 and 182.
`thereof, which clevis structures 274 are pivotally con
`The frame 16 mounts suitable main motor 190 that is
`nected as at 276 to the frames (not shown) of the respec
`50
`to form the prime mover of the machine 10 and may be
`tive crawler assemblies. 36 and 38.
`a diesel engine of suitable capacity for providing the
`.The yoke shank 272 has affixed to same the shaft 44
`driving power to operate all of the drives associated
`which has its end portions 276 and 278 suitably jour
`with the machine 10. Motor mounting frame members
`naled in the frame cross members 172 and 174, as indi
`192 and motor mounting brackets 194 affixed thereto
`cated in FIG. 3, for pivotal movement about the indi
`55
`may be provided for this purpose. The frame 16 also is
`cated horizontal axis 42 that extends coplanar with the
`provided with an operator instrument pedestal 196 on
`frame portion 178 (see FIG. 2).
`which the instrument panel 132 is formed as well as
`The planing cylinder 50 is of coreless annular config
`suitable guard railing (not shown) about the upper mar
`uration as shown in FIGS. 5 and 8, comprises an annular
`gin of the frame 16 for safety purposes. At the rear end
`coreless framework comprising a plurality of rings or
`of frame 16 the frame includes a pair of spaced apart
`annular segments 280 (see FIGS. 5 and 8) fixed together
`in spaced apart relation at either end of the planing
`upright members 198 between which is mounted a U
`shaped support 200 in inverted position upon which the
`cylinder 50 by employing suitable spacer bars or plates
`conveyor assembly 94 rests when in its retracted posi
`282 welded therebetween as suggested by FIGS. 5 and
`tion of FIG. 9. The members 198 also mount suitable
`8. The cylinder side wall, 57 in accordance with the
`65
`brackets 202 in which pulleys 204 are journaled over
`present invention, comprises a plurality (a pair in the
`which are trained support cables 206 connected be
`illustrated embodiment) of shell sections 284 and 286
`tween either side of the conveyor assembly 92 and the
`affixed to the respective rings 280 (by employing suit
`
`30
`
`Page 9 of 14
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`4,186,968
`9
`10
`For adjustment purposes, the runner 306 has its jour
`able bolts 288), to define cylindrically contoured shell
`naling arrangement arranged for limited vertical adjust
`281. When a sufficient number of the cutters 59 need
`repair or replacement, this can be conveniently effected
`ment relative to the frame 302 for appropriately setting
`the device 300 for a particular difference in the levels of
`in the field by removing the plates 284 and 286 and
`replacing them with corresponding plates equipped
`pavement surfaces 53 and 55, for disposing the base 303
`of frame 302 in a horizontal operating position.
`with fresh cutting implements. It is to be noted from
`The mold board 70 comprises a fabricated plough
`FIGS. 5 and 8 that the basic mass of cylinder 50 is
`shaped member 320 having an arcuate configuration
`distributed in an annular configuration about the axis of
`transversely of same that roughly complements and is
`rotation of cylinder 50 adjacent the movement paths of
`concentric with the arced configuration of the planar
`cutters 59.
`10
`cylinder 50. The spacing of the member 320 from the
`The auger forming flanges or flighting 61 comprise
`paths of movement of the cutters 59 is made appropriate
`helically contoured plates 290 suitably weld