US2984026A - Road-working machine - Google Patents

Description

May 16, 1961 w. R. THOMPSON ET AL 2,984,026

ROAD-WORKING MACHINE May 16, 1961 w. R. THoMPsoN ETAL 2,984,026

ROAD-WORKING MACHINE Filed March 12, 1956 5 sheets-sheet 2 IN VEN TOR5 May 16, 1961 Filed March 12, 1956 w. R. THOMPSON gTAL ROAD-WORKING MACHE 5 Sheets-Sheet 5 irme/V06 May 16, 1961 w. R. THOMPSON ET AL 2,984,026

ROAD-WORKING MACHINE Filed March 12, 195e 5 sheets-sheet 4 INI/EN T0125 //u /fw P. Manara# (rm i. 54m/0525 @oA/4m i. MURRAY y @um M )awwm/ May 16, 1961 w. R. THOMPSON ET AL 2,984,026

ROAD-WORKING MACHINE Filed March 12, 1956 y 5 Sheets-Sheet 5 1NVENTOR5 //u/AM P. THe/w50# 2,984,026V ROAD-WORKER; MACHINE William R. Thompson, Salinas, Cyril E. Saunders, San Francisco, and Donald E. Murray', Turlock, Calif., assignors to Thompson Scoop-Grader, Inc., San Francisco, Calif., a corporation of California Filed Mar. 12, 1956, ser. No. 571,008 `7 claims. (ci. 37-126) `This invention'relates to and, in general, has `for its object the provision of a combination grader, scariiier and road-working machine capable of simultaneously cutting or scraping dirt from a bank, culvert or road bed and delivering said dirt to a scoop for carting the same away.

There are, of course, various types of road-working machines, includingV scoops and'scraper blades. However, none of them is so arranged that the scraper may be used in co-operation with the scoop so that the scraper can cut dirt from a bank or a culvert and deliver that dirt to the scoop for carrying it away before the supporting wheels of the machine pass over the dirt.

It is one of the objects of this invention to provide a road-working machine, including front wheels, a frame section, a scraper blade assembly pivotally mounted adjacent the front end of said frame rearwardly of the front wheels of the machine, a scoop fixed intermediate the front and rear ends of said frame, a scariiier assembly mounted between the said scraper blade and scoop, means for selectively adjusting the level of -the frame, scoop, scariiier and scraper relative to the ground, and ground-engaging wheels for supporting the rear end of said frame.

It is a further object of the present invention to provide a road-working machine that has included therein scraper, scarier and scoop assemblies, wherein said assemblies can be selectively operated singly or in combination of any two or all three thereof.

It is a further object of the invention to provide a road-working machine that includes scraper, scarier and 2,984,026 Patented May 16, 1961 r ICC 2 is a top plan view of the machine illustrated in Fig. 1.

Fig. v3 is a vertical section taken on the section line 3-3 of Fig. 1.

Fig. 4 is a horizontal section taken on the section line 4*-4 of Fig.v 1.

Fig. 5 is a vertical section taken on the section line 5-5 of Fig. 4.

t Fig. 6 is a fragmentary side elevational view of the scarier and scoop assembly, showing the same with the scarier in use and the scoop being loaded.

Fig. 7 is a fragmentary side elevational view of the scarifier and scoop assembly, showing the scariiier assembly raised and -the load being dumped from the scoop.

'Fig 8 is a diagrammatic View showing the scraper cutting into a bank or shoulder and conveying the dirt to the scoop.,

Fig. 9 is 4a diagrammatic view showing the scraper cutting into or` cleaning out a culvert and conveying the Y dirt to the scoop.

scoop assemblies, wherein said assemblies can be so ad- The road-working machine illustrated in the drawings comprises a main frame A, a scraper blade assembly B suspended from said main frame rearwardly of the front ground-engaging wheels of the machine, a scoop assembly C mounted between the end of said main frame and the front ground-engaging wheels, an adjustable scarier assembly D mounted between the said scraper blade assembly and the scoop assembly and means for operating the various parts of said four assemblies.

Main Frame A Figs. 1 and 2 show a main frame including a front frame section arcuate in side elevation, a pair of parallel intermediate arms and the side walls of the scoop assembly. Said front frame includes a front arcuate frame member 1,0 and a transverse cross-member 11. A pair of intermediate arms 12 is welded at one end thereof adjacent the forward end of the front frame 10 and extends rearwardly and outwardly. Said intermediate arms 12 are welded at their other ends adjacent each end of the transverse cross-member 111. A pair of reinforcing arms 13 is welded at one end adjacent the rear end of the frame 10 and extends rearwardly and downwardly and is welded at its other end to said transverse crossmember 11. l Pivotally mounted at the forward end of said front arcuate frame member 10 is a pair of groundengaging wheels 14 for supporting the forward end of the rig and more particularly the forward end of said front frame 10. A pair of lateral braces 1S is welded Y centrally of the arms 12 and the front frame 10. Welded road, and by proper adjustment of the scraper blade assembly, can reconvey the gravel back onto the road surface and spread it to the desired depth. j

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description where that form 4, 1herlowel. forward portion thereofbypins 2l A fabri of the invention which has been selected for illustration in the drawings accompanying and forming a part of the present specification is outlined in full. In said drawings, one form of the invention is shown, butit is understood that it is not limited to such form since `the inven- 1,

tion as set forth in the claims may be embodied in other forms. i

Referring now to the drawings: i lFig. 1 is a side elevation of the road-workingmachine embodying the objects of our invention.'

tothe ends of the transverse cross-member 11 is a pair of -parallel intermediate arms 16 that extends rearwardly and downwardly, with'the free end thereof journaled by 17 to side walls `18 of the scoop assembly. The side ywallsv 18 of thevscoop assembly `are parallel and identical in shape and construction and form a part of said inain frame. Saidside wa1lsv18-are connected by transversely extending cross-members 19 and 20. A pivotal bucket 21 is journaled to'the side walls 18 at cated axle-supporting frame is welded and depended from the cross-members 19 and 20. Said supporting frame 'has arms 23 and 24, a cross-member 25 and a horizontal member'2'6; Axles 27 are ailixed to the cross-member u2,5 andto the rear end of the sidewall '18 as` indicated .at 28. Y `Journaled-on said axles 27 `are ground-engaging `'rvifheels V29' for supporting the rear end of the rig and, J,more particularly, the rear end ofthe scoop assembly. 3A-frarue extension' 30 is welded to the rear end of said front frame member 10. l The purpose of said extension 30 is to pivotally secure hydraulic jacks 31 and 32 that are employed to raise and lower the scoop assembly C and scarifier assembly D, respectively.

lScraper assembly Lugs 33 are welded to the under side of al forward arm 34 of the frontframe 10. Pivotally securedto saidlu'gs 33 by a pin 35 is a universal joint 36. This joint, in turn, is connectedto the forward end of a sub-frame 37 formed with a T-shape that carries a anged ring 38 on which a scraper .b1ade.39 is mounted. .L

U-shaped brackets .40 are pivotally axedrto eachof the lateral braces 15 by pins'f40a and Vpivotally `mounted in said U-shapedlbrackets 40 arehydraulic fjacks 41. This arrangement forms a toggle connection between the hydraulic jacks and the braces 15. Piston rods'l42 of said hydraulic jacks 41 are pivotally attached at 43 to Asaid T-shape frame 37 adjacent the ends of a cross-'bar 44 Aof said T-frame 37.V As a result of/this cons tructiodrthe scraper blade assembly can be raised or lowered and angularly tilted from the horizontal. A v

, A boss 45 is welded to the under side o f therearmof the arcuate frame 10. An adjustable arm 46 is pivotally attached to said boss 45 at onel end thereof while the other end gf Saidadiustable arm. is. pivotallyattached to @extension A47.of the..Crosrr-lvalr .44 of SaidA 'l'rfrme 37- Said adjustable. am. islfnrmed with an inner. bar 48 thatslisiesina .Sleeve .49. .Saidfba .4.8 and Sleeve 49 are prgvdedlwith a., Series. Ofspaced hOIeS 50. arranged t0. register with .Qre nthen Byfinserting la, pia thrgugh these holeshthe length of saiddjustable armw46 canbe altered so that the scraper assembly is held from shifting angularly.

Formed integrally with eahnend of the T-frame 37 is a bracket 51 (Fig. 5). Said bracket has an upper plate 52,'a downwardly extendinginner flange 53, and an adjustable lug 54 formed With an elongated `s1ot'55 therein. The inner end of said lug 54`has land 56 that holds said lug in spaced relation to the upper plate 52. Studs 57 are welded to the upperl'plate 52 vand -project downwardly therefrom through said elongated slots 55. Said studs 57 are threaded at their outer end and a nut 58 and a washer 59 holds said lugs 54 inplace. The outer end of said lugs 54 supports the annular flanged ring 38. The elongated slots formed by arrangementof said lugs 54,A land 56Y andV plate 52 permit the annular flanged ring 38 and the scraper blade 39 to be rotated horizontally. The lugs 54 are adjustable laterally by a pair of set screws 60` that arethreaded through the innerv ange 53 and bear against the .adjustable lugs .54. Lock nuts 61 lock said set screws 60 in proper position.

The annularilanged .ring ,38 is formed with a flat upper ring 62 and a,downwardly extending skirt .65..V A series of spacedholes 64.is formed in a portion of theeat upper ring 62. A.springfloaded plungerl65, arranged to register with the holes 64, ismountedon thedbracketSl adjacent the universal, joint,36. `By raising thephmger, 6 5, ,the ring 38A and the scraper blade 39,* may be rotated about aY horizontal plane and, whensaid SCIaPQlQblade iswin the. desired relative, angular position, the plunger, is inserted into one Yofthe holes` 64, lockingfthering and Lthe scraper blade 39 irl/,said desired angular position.` A lever arm 66 is1 attached tobsaid plunger-.65. Fastened t9 the Qursnd 0f Said arm 6618121 Cable@ for metall ing, the Plunger- ,Said Cableexteds t0. the .QPeratQrS Station n, the draft vehile- Toassistia holding the fins 3,8. in the fesredarlgular. pgsitipn, the. lilas. .trgav vbe forced outwardly against the skirt 63 by adjustment ofthe set screws 60. i l l,

Weldedto and depending from'the ritig 38'atldia`inetrically opposed points thereonj is'a"'pairof'a'r'cuat e fingers curved scraper blade '39 isfprovided'onits r'e'ar'face with gf bifurcated 4lugs or fingers 71. K.The said scraper blade 39 is adjustably connected to the lower ends of the arcuate fingers 68 by bolts 72. A series of lugs 73 is welded to said rear face of the scraper blade 39 adjacent the upper edge thereof and in alignment with the lugs or lingers 71. Secured to said lugs 73 and extending rearwardlyvfromV said lugs 73 adjacentlthe fingers 68 are arms 74 which are provided with a sei-ies of spaced holes 75 arranged to register with a hole formed in each.

of the yfingers l68. By inserting a bolt 76 through these holes, the scraper blade can be locked at any desired inclination.

It is therefore apparent that as a result of this construction the scraper blade 39 can be selectively tilted, angled, elevated or lowered under the influence of the hydraulic jacks 41, which are under the control of suitable fluid valves located on the draft vehicle pulling the rig. By means of the lugs 71 and 73 the scraper blade 39 can be adjusted laterally of the rig. Lateral adjustmentY of the Iscraper assembly is accomplished by means of adjusting'tlelengths of the arm 46, plunger 65 and lugs I54. It'should be noted that fluid under pressure for actuating the fluid motors is derived from Suitable pumps mounted on the draft vehicle.

Scoop assembly C APivotally monted between the rear ends 'of the vintermediate ar'ins I6 by the pins 417 is a bowl or scoop generallyde'signated by the reference numeral 78, including the sidewalls 18 and the pivotal bucket 21, said bucket having `a bottom 79 and a back 80. The pivotal bucket 21 'is journaled to the side walls 18 by the pins 22. The said bottom 79 and back Stl'are integral with each other, being welded to and supported by angular arms 81, as shw'ninFigs. 6 and 7. j The'jbottom of the bowl or'scoop 78 terminates at its end in'an inclined, 'excavating lip 82 having a sharp cutting edge 83. Each of the side walls 18'isreinforced by reinforcing member 84 welded to said side walls. Also welded to the forward ends of said sidewalls 18, to reinforce and hold said side walls 18 in spaced relationship, is a cross-member 86.

`Welded to the rear of the side walls 18, adjacent the upper edge thereof, 'are stops 87 against which the back yof the bucket rests when said bucket 21 is'being loaded oris Vin carrying position. The back 80 of the bucket has afinger 88 welded to the outer side thereof. A Spring"89 is aixed at one end to'said linger 88 and atl its other-end to the cross-member 425. Said spring'89 tends 'to vkeep the'pivotal'bucket 21 in loading position at all times.

Pivoted to the side walls 18 by pins 90 are angular arms 591. VAflixed to the forward ends 'of said angular arms' 91' is a' front apron -92 arranged to swing across Vand closeor crack open the front end of the bowl or scoop 78. The'said angular arms 91 are formed with `downwardly extending arms 93 and forwardly extending arms 94. Hydraulic 'jacks 95 are pivotally attached to the lower end 4of said `downwardlyextending arms 93 at 96. The opposite ends` of said hydraulic jacks 95 `arepivotally at- Vached adjacent'the'rear end of the sidewall 18 by pins A- pair' of bifurcated, upwardly extending lugs 97 is formed at the forward upper end of each ofthe side walls 18. Journaled `between said lugs '-97 on shafts 98' are sheaves 99. Positioned immediately belowsaid 'sheaves 99 is a pin 100. Cables 101 are aixed atv one end to the forward end 'of said arms 94 at 102 and f1at their other end they are aixed to the angular arm 81 of the bucket at; 103. When thevpivotal bucket 21 is in loading position, said cables'101 are slack, as 'illustrated in lFig. 6. When it is desired to dump the load, the hydraulic jacks 95 are actuated, forcing-piston rods "104 of said jacks forwardly.` Saidpiston rods I104 vbear against 'the d'ovm wardly extendingiarmsi93 ofthe angular arms"91,fforc ing said-angular arms 91":to swing upwardly about the pinsf90. `By movement ofthe angular arms 91 upwardly, the cables 1011are tightened against the sheaves 99 and pull the p ivoted bucket -21 upwardly 'about the pivot pins 22, dumping the contents of said bucket 21. When the jacks 95 are retracted, the spring 89 pulls the bucket 21 back to loading position. 'Ihe'pins 100 hold the cables v101 in place and inV alignment with the sheaves 99. They also act to guide the cable -101 when the front apron 92 is closedagainst said side walls 1-8 and excavating lip 82 and the iload of dirt is being transported to another location for unloading. The cable 101 is of sufficient length, of course, to 4permit said front apron 92 to move to closed position.

Located centrally of the cross-member 86 is a pair of bifurcated lugs 105, and pivotally attached to said lugs 105 by a pin '.106`is the hydraulic jack 3.1. By actuating said jack 31, said scoop assembly may be raised or lowered. The adjustment of said scoop assembly can be made independently of adjustment of other parts of the Lugs 107 are attached to the frame extension 30, and journaled to said lugs -107 by a pin 108 is an arm 109. Formed at the free" end of said arm 109 is a hole 110.

Aiixed centrally ofthe cross-member 86 are lugs 1111 that have formed therein holes 112. When it is desired to transport the Vrig for any distance, either loaded or unloaded, and the operator wishes to take the weight of the loador scoop assembly off of the hydraulic jack 3.1, the arm 109 can be rotated clockwise so that the hole `110 in said arm 109 is-in'alignment with the hole `112 of the lugs 111. A pin -113 can then be inserted in said aligned holes y110 and 112 and the arm 109 thus positioned, as shown in dotted lines in Fig. l, holds the scoop assembly in raised position.

Scarfier assembly D Attached to the transverse crossmember 11 is a series of pairs of bifurcated lugs 114. Pivotally affixed to each pair of said lugs 114 bydpins -1-15 are scarifer arms 116. A transverse scarier bar 117 is welded to the free ends of said scariier arms 116. Attached to said scariiier bar 117 in spacedorelation is a series of scariiier blades 118. Said blades have a, sharp cutting toe 119.

Located centrally of, and on the front face of the transverse scarier bar 117, is a pair of bifurcated lugs 120. Pivotally attached to said lugs 1Z0 by a pin 121 is the hydraulic jack 32. The vertical positioning of the scarifer blades 1-1`8`is controlled by actuating the hydraulic jack 32. It is also tolbe noted that said scarier blades 118 may be controlled independently or may be used in co-operation with the scooporscraper blade by actuation of the hydraulic jack 32.

Mounted on the draft vehicle (not shown) is a bankv of valves for controlling the various lluid lines 122 communicating between the various hydraulic jacks, thek source of ud under pressure and the control valves.

I Operation Referring moreparticularly to Figs. l, 6, 7, 8 and 9: In Fig. 1, the bowl or scoop 78 is shown in its ldirtcarrying position with its pivotal bucket 21 in normal position, its side arms 94 substantially horizontal, and the front apron 92in its.closed position. The hydraulic jack 31 is in retracted position, lifting the bowl or scoop 78,

er are held iii raised position, thus permitting the rig to4 By extending the jack 31, the scoop 78 can be bodily lowered to itsiexavatingor loading position, as illustrated` in Fig. 6, wherein the apron 92 has been raised tl a cracked position by partially extending the jack 95. Thus, `when the scoop is so positioned, on moving the rig forward, the.- scoop 78 can befilled. By retracting the jack 31, the bucket 21 is raised and thereafter the jack load has been dumped, the hydraulic pressure on the jacks 95 is then cut and the spring |89 attached to the said bucket returns the same to normal loading position.

In some instances, it is desirable to accomplish three operations at once; namely, moving the surface material away from the action of the scoop, scarifying the subsurface soil to dig up the same, and loading the loose subsurface soil dug up by the scariiier into the scoop.

For example, if a heavily gravelled road is being worked on and it is desirable to move aside the loose gravel surface, grade the road-bed, and then re-use the4 gravel, or if it is desired to save and replace top soil in a vfield that is being graded, the said scraper blade 39 is adjusted to clear the gravel or top soil from the surface of the road or leld and convey it laterally of the scoop 78. The scariiier blades 118 may be vertically adjusted by the hydraulic jack32 to dig into the subsurface of the road or field, digging and loosening the said subsurface material immediately in front of the scoop 78. Then said loosened subsurface material may be picked up by the scoop 78 and carted away. Thus, in one pass, three operations may be accomplished. Thereafter,A

if it is desired to replace the gravel or top soil, the scraper may be adjusted to move said gravel or top soil back in place.

The present machine may also be used with only the scraper blade 39 and scoop 78. For example, if it is Y desired to dig or clean out a culvert or cut down a bank or shoulder along the side of a road as shown in Figs. 8 and 9, in such a case, with the wheels of the rig still on the roadway, the scraper blade assembly may be moved to extend from the side of the rig by adjustment of the scraper blade 39 laterally in the lugs 71. Then by actuating the jacks 41, said scraper blade may be tilted upwardly into a bank, as shown in Fig. 8, or downwardly into a culvert, as shown in Fig. 9. Thereafter, when said rig is moved forward, earth from the culvert or bank,

as the case may be, is conveyed laterally by said scraperI into the path of the scoop and loaded thereon.

This sequence of operation is of greatimportance, for the position of the scraper blade 39 can be set relative to, and independently of, the frame, the scoop, the

scarier and the ground-engaging wheels of the rig. The,

rig may be pulled down a kroad or highway with the wheels thereof on the surface of the highway, the scraper blade so 'adjusted can dig, clear or cleanra culvert, conveying the dirt or debris onto the roadway to be picked' up in the scoop, or, if it is desired to cut down or re-` move albank or shoulder adjacent the road, said bank or shoulder may be cut into or cut down by angular,` adjustment of the scraper blade and the dirt therefrom in the operation of its several parts, one, two or three operations can be accomplished selectively at` the choice of the operator.

Having thus` described our invention, what we claim and desire to secure by Letters Patent is;A

1. A roadfworking machine. comprising a main frame including a front arcuate. frame. member mounted on a front wheel, a` transverse cross member, and a pair of parallel` armsl mounted rigidlyA to the ends of said cross memberand extending rearwardly therefrom; a scraper assembly, means for supportingv said scraper assembly from. said arcuate front` frame member and vertically raising andlowering` said assembly; a scarier assembly, means for supporting said scarilier assembly from. said transverse cross member and vertically raising and low,- ering said assembly; a scoop assembly pivotally mounted between the ends of said pair of parallel arms and being supported upon'rear wheels, and means for pivoting said scoop assembly between lowered and raised positions.

2. A road-working machine comprising a main frame including a front arcuateframe member mounted upon front wheels, a transverse cross member, and a pair of parallel arms mounted rigidly to the ends of said' cross member and extending rearwardly therefrom; a scraper assembly,y means including at least one iluid operated jack for supporting said scraper assembly from said arcuate front. frame member; a scarilier assembly, means including a iluid operated jack for supporting said scraper assembly from said transverse cross member; a scoop assembly pivotally mounted between the ends of said pair of parallel arms and being supported upon rear wheels,v aV fluid operated jack pivotally mounted from said front frame member and having a piston rod pivotally` connected to said scoop assembly, and means for selectively connecting said scoopv assembly to said front frame member in araised traveling position.

, 3. A road-Working machine comprising a main frame includingA a. front arcuate frame member mounted upon front wheels, a transverse cross member, and a pair of parallel arms mounted rigidly to the ends of said cross member and extending rearwardly therefrom; a scraper assembly, means including atleast one uid operated jack for supporting said scraper assembly from said arcuate front frame member; a scariler assembly, means including a uid operated jack for supporting said scraper assembly from. said transverse cross member; a scoop assembly pivotally mounted between the ends of said pair of parallel arms and being supported upon rear wheels, a fluid operated jack pivotally mounted from said front frame member and having a piston rod pivotally connected to said scoop assembly, said scoop assembly including an excavating lip, a pivotal bucket mounted upon a horizontal axis adjacent'saidv lip, a front apron pivotally mounted upon a horizontal axis parallel to said'bucket axis, means including a liuid operated jack for actuating said front apron between a lowered and raised position, and motion transmiting means interconnecting saidi apron and bucket for moving said bucket into a dumping position upon actuating said apron into araised position.

l4A Al road-working machine comprising a main frame including a front arcuate frame member mounted upon front wheels, a transverse cross member, and a pair of parallelv arms mounted rigidly to the ends of said' cross member and extending rearwardly therefrom; a scraper assembly universally supported from said front frame member, a pair of fluid operated jacks pivotally tmounted on said front frame member and having piston rods 'vertically disposedand pivotally connected to said scraper assembly at laterally spaced points thereon; a scarier assembly pivotally mounted from said transverse cross member upon a horizontal axis, a fluidl operatedI jack pivotally mountedi on said-frontframe member and; having'. a piston rod pivot.-

allylconneeted ftoysaidscarilierassembly; a; scoop assembly4 Pivotallx mounted-.betweenthefends otrsaid. pair ofrparallel u;

arms `and being supported upon rear wheels,` and a uid operated jack pivotally mounted on saidfront `frame mem ber and having a piston rod pivotally connected to said scarier assembly.

5.. A roadaworkingmachine comprising, amain frame including, a front arcuate frame member mounted upon front wheels,k a transverse cross member, and' a pairl of parallel arms mounted rigidly to the ends of said cross member and extending rearwardly therefrom; a scraper assembly universally supported from said front frame member, a pair of lluid operated jacks pivotally mounted on said front frame member and having piston rods vertically disposed and pivotally connected to said scraper assembly at laterally spaced points thereon; a scarier assembly pivotally mounted from said transverse cross member upon a horizontal axis, a uid operated jack pivotally mounted on said front frame member and having a piston rod pivotally connected to said scarifier assembly; a scoop assembly pivotally mounted between the ends of said pair of parallel arms and being supported upon rear wheels, a uid operated jack pivotally mounted on said front frame member and having a piston rod pivotally connected to said scariiier assembly, and means for selectively connecting said scoop assembly to said front frame member in a raised traveling position.

6. A road-working machine comprising a main frame including a front arcuate frame member mounted upon front wheels, ar transverse cross member, and a pair of parallel arms mounted rigidly to the ends of said cross member and extending rearwardly therefrom; a scraper assembly universally supported from said front frame member, a pair of fluid operated jacks pivotally mounted on said front frame. member and having piston rods vertically disposed and pivotally connected to said scraper assembly at laterally spaced points thereon; a scarier assembly pivotally mounted from said transverse cross member upon a horizontal axis, a tluid operated jack pivotally mounted on said front frame member and having a piston rod pivotally connected to said scarifer assembly; a scoop assembly pivotally mounted between the ends of said pair of parallel Iarms and being supported upon rear wheels, a duid operated jack pivotally mounted on said front frame member and having a piston rod pivotally connected to said scarier assembly, said scoop assembly including an excavating lip, a pivotal bucket mounted upon a horizantal axis adjacent said lip, a front apron pivotally mounted upon a horizontal axis parallel to said bucket axis, means including a liuid operated jack for actuating said front apron between a lowered and raised position,

and motion transmitting means interconnecting said apronl and bucketfor moving said bucket into a dumping position upon actuating said apron into a raised position.

7. A road-working machine comprising a main frame including a front arcuate frame member mounted upon front wheels, a transverse cross member, and a pair of parallel arms mounted rigidly to the ends of said cross member and extending rearwardly therefrom; a subframe universally supported from said front frame member, a pair of fluid operated jacks pivotally mounted on said front frame member and having piston rods vertically disposed and pivotally connected to said sub-frame at laterally spaced points thereon, a scraper rotatably supported on said sub-frame; a scarilier assembly pivotally mounted from said transverse cross member, a fluid operated jack pivotally mounted on said front frame member and having a piston rod pivotally connected to said scarier assembly; a scoop assembly pivotally mounted between the ends of said pair of parallel arms and being also mounted upon rear wheels, and a IuidI operated jack pivotally mounted on said front frame member and having a piston rod pivotally connected to said scoop assembly.

(References on following page) References Cited in the le of this patent UNITED STATES PATENTS Milling Sept. 12, 1905 Werts et al. Mar. 4, 1919 Barthuli Ian. 9, 1923 Hill May 20, 1930 Pursel Dec. 30, 1930 Ball et al. Dec. 1, 1931 Gove Nov. 10, 1936 10 10 Cluster ...1 Dec. 13, 1938 Click Feb. 23, 1943 Mac Donald Dec. 4, 1951 Leliter 1 Aug. 24, 1954 Brimhall May 15, 1956 Leliter Iuly 16, 1957 Armington Nov. 3, 1959 FOREIGN PATENTS Great Britain of 1907

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