US2247982A - Road grader - Google Patents

Description

F. E. ARNDT July 1, 1941.

ROAD lGRDER Filed Dec. 20, 1939 GSheetS-Sheefc 1 s it ,//yVE/YTo/Q.' FQANKUN EARNDT,

-ATT'Y July 1, 1941.

F. E. ARN DT ROAD GRADER 6 Sheets-Sheet 2 /Nl/E/yTo/Q: FRANKLIN EARNDT,

Filed Deo. 20, 1939 .Huhn 1 1 1 1 11 NQ NN RQ mo.

ATT'Y.

F. E. ARNDT July 1, 1941.

ROAD GRADER Filed Dec. 20, 1939 6 Sheets-Sheet 3 /NVE/Tof?! FRANKLIN E. ARNDT,

BYMn/L HTW July 1, 1941.

F. E. ARNDT ROAD GRADER Filed Dec. 2o, 1959 6 Sheets-Sheet 4 rig'.

/N VENTO/Q I FRANKUN E. ARNDT,

BYLA Wink/UM,

July 1, 1941. F..E. ARNDT ROAD GRADER Filed Dec. 2o, 1959 6 Sheets-Sheet 5 July 1, 1941. F. E. ARNDT ROAD GRADER Filed Dec. 2o, 1939 6 Sheets-Sheet 6 Patented July 1, 1941 ROAD GRADER Franklin E. Arndt, Galion, Ohio, assignor to The Galion Iron Works & Manufacturing Company, a corporation of Ohio Application December 20, 1939, Serial No.310,153

My invention relates to road graders, and one of its objects is the provision oi improved and eilicienlt means for adjusting the mcldboard 4of a road grader from a position under the` machine to a steep bank-cutting positionl at one -side -of the path of .travel of the machine.

More particularly it is the object of the present invention to provide improved and eicient `mechanical means operable from the operators .station for .adjusting Vthe moldboard of a road grader in elevation -and transverse -inclination and to laterally shift the positions of the moldboard forl the purpose of carrying 4on road grading operations or bank-sloping operations.

Another object of the invention is the provision of improved and efficient laterally shifting mechanism for a. road grader comprising an arcuate rack guided along the arc of a circle surrounding the frame of the machine, 4combined with drawbar lifting hangers individually operable and each operable independently `of the arcuate rack.

A further object of 'the invention is the provision of laterally shifting 'mechanism comprising an annular rack surrounding the frame of thei machine and connected by a vlink to the drawbar of the road grader, combined with extensible hangers connected to *the drawbar and means for individually actuating the hangers and means for independently rotating the annular rack.

Another object of the invention is the provision in a road grader of laterally shifting mechanism connected to the drawbar of the machine and comprising a circular rack surrounding the frame of the machine, combined with spaced-apart eX- tensible hangers connected ,to `spaced-'apart 4longitudinal rock shafts so 'located las to be cleared 4by the latterally shifting mechanism when the latter co-operates with the actuation of the hangers to move the moldboard to an lupright :bank-cutting vposition at either side of the machine.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claims.

In the accompanying drawings,

Figs. 1 4and 2, placed end to end, represent an elevation of the road grader embodying my improvements;

Figs. 3 and 4, placed end to end, 4show a plan view of the road grader .shown elevation in Figs. 1 and 2; v

Fig, 5 is an enlarged .sectional elevation of ran the annular rack encircling the main frame;

Fig. 6 is a cross-sectional elevational View taken on the line 6-8 of Fig. 2, looking forward fin the direction of the arrows, with the moldboard in road grading position;

Fig. 'l is a sectional elevational View looking forward in the direction of the arrows on the section line 6--6 of Fig. '2 but with the moldboard in upright position and the rear wheel structure shown in dotted lines for diagrammatic illustra tional purposes;

Fig. 8 is a rear View ofthe machine with the moldboard in bank-sloping position andthe rear wheels adjusted for cutting operations along one Wall of 5a ditch at one side of the roadway; and

Fig. 9 Vis a view similar to Fig. 6 except that the moldboard is extended laterally to a maximum extent; and

Fig. 10 is a sectional plan view taken on lthe line yIll-Ill of Fig. 5. Y

The machine shown in the accompanying drawings comprises a vehicle frame I2 mounted on the front steering wheel unit I3 and the, rear wheels I4, 14 as shown in Figs, 1, 2, 3, 4. The front wheels I5, I5 and the rear wheels I4, I4 are preferably of metal comprising radial spokes and circular rims having circular edges on opposite sides adapt-ed to dig into the ground'when leaned as hereinafter more fully described.

As shown in Figs. 1 and 2, the main frame 'I2 is upwardly arched and is composed of two 1ongitudinal channel beams I6, .I6 with their upper and lower flanges lextending toward yeach other yand welded together to form a box-like structure, as shown in Figs. 6 and 7. 'Ihe rear ends of the channel beams I6, I6 are spread apartin diverging relation as shown at 116', I6 in Fig. 4, and these diverging extensions slope `downwardly as shown in Fig. 2.

As shown in'Fig. 1, the forward end of the 'main I frame I2 is rigidly connected, preferably by 'we'ldv ing, to the upright post II 'I the lower end of which .is mounted by means of the ball and socket joint I8 on the yoke or bolster I9 rigidly connected to an axletree 2i) of the front steering wheel unit. The front wheels may be provided with mechanism for leaning the same and such mechanism vmay be actuated by means of the crank 2l through the rock shafts 22, 23, 124, 25 connected together by universal 'joints as shown in Figs. 1 and 2.

The accompanying drawings illustrate a pull type of grader having a vehicle tongue'26, secured by means of a plate 21 to the vertical post 2-8, the upper end of which is journaled at `29 tothe front side of the bolster IS, the lower end of rthe post 28 being journaled at 38 to the front axletree 28 as shown in Fig. 1.

As shown in Figs. 1 and 3, worm gear mechanism 3| is mounted on the tongue 26 and connected to a sprocket 32 which meshes witha chain 33, the ends of which are connected to the links 3'4 and 35. The rear ends of these links are pivoted at 36, 31 to the axletree 28. Steering may be effected by turning the wheel 38 at the operators station shown in Fig. 2, this wheel being connected by means of the rock shafts 89,`

48, 4| land 42 to the worm gear mechanism 3|.;

The rock shaft 39 is journaled in the bearings 43, 44 pivoted respectively at 45, 46V to the supporting posts 41, 48 as shown in Fig. 2.

'I'he rock shaft 4| is mounted on the plate 49 which is pivoted at 58 to the upper end of the post 5| which extends upwardly' from vthe post I1.` The lower end of the plate 49 is connected by means of a counterbalancing spring 52 to the hook 53 secured'toY the tongue 26 intermediate the ends thereof, as shown in Fig. l. i

Secured rigidly to the rear en'dsof the longitudinal beams I6, I6 is la cross-supporting structure 54'(Fig. 2), comp-rising the angle irons 55, 55 (Fig. 8) which co-operate with means for guiding the Yrear end of the main frame along the rear axletree 56. 'By means of a crank V51 connected to vgearing in the housing 58,'the rock shafts 59, 68 may be actuated to operate 'mechanism for shifting the rear end of the main fram along the axletree 56.

Mechanism Vfor leaning the rear wheels I4, |4

may be actuated by means of the crank 6| connected to the gearing-.in housing 62 for actuating the rock-shafts 63, 64 Iand thereby operate the gearing 65 to shift laterally lthe cross-piece 66, the latter being connected to the upper end of the arms 61, 68 which are secured tothe rear wheel axles.

The leaning of theY rear wheelsv may conform to the leaning of the front wheels. Therefore when lthe moldboard is inroad grading position inclined relative to the line of draft, the leaning of the rear wheels cooperates with the leaning of the front Wheels and the steering of the front wheels, .to counteract the tendency of the moldboard to shift the whole machine ktoward that side where the front end of the moldboard is located. The shifting of the rear'end of the main frame'by means of the crank 51, relativelsr to the rear Wheels, enables the rear Wheel at the operating side'of the machine to be kept in align- 'mentiwith the front wheel at the operating side of the machine. A l

Referring now to the road-working implement comprising a m'oldboard or a scraper blade 69 and the structure for supportingl the same, it will be seen that the supplemental frame 18`const itutes ardrawbar for the moldboard 69. "This of the narrow'elongated main frame, when the moldboard isshifted from road grading position uto steep bankcutting position at one side of the machine, as illustrated in Fig. 8. By referring to Fig. 3 of the drawings it will be seen that the forward portion of the supplemental frame 18 rconverges' or tapers toward the post I1.

While `the main frame is upwardly arched t'o provioleample room for the drawbar and moldbard in their various'positions Vof adjustment, the drawbar is so shaped as to have its rear end wardly and forwardly, as shown in Figs. 1 and 2,

placed end to end. The forward end portion of the drawbar is preferably horizontal, as shown in Figs. 1 and 2, when the moldboard is in road grading position at the road surface.

As shown in Fig. 1, the forward upper edges of the supplemental frame 18 are inclined downwardly and forwardly at 1|. It should be understood that the main frame and the drawbar are thus especially shaped to facilitate movement of the moldboard to the upright bank-cutting position shown in Fig. 8.

n The supplemental frame or drawbar 18 comprises spaced-apart angle irons 12, 12 connected by the transverse bracing tubes 13, 14, the end's of which are welded to the angle irons 12, 12'. Welded between the forward ends of the angle irons 12, 12' Vis a longitudinally extending tubular socket 15. VAs shown in Fig. l, an eye-bolt 16 is adapted to be swiveled to the front end of the drawbar having its screw-threaded rod 11 extended throughthe socket 15 and secured in place by the nut 18. A horizontal U-bolt 19 extends through the eye-bolt 16, as shown in Fig. 1, and this U-bolt extends through openings in the laterally extending brackets 88 and is held rigidly connected to the verticalpost I1 by means of the nuts 8|. The rear side of the post I1 has a semicircular recess for receiving the forward end of the eye-bolt 16, but it should be understood that while the U-bolt 19 occupies a horizontal vplane and the eye-bolt 16 occuplies a vertical plane, a

.universal connection is afforded to the extent that the eye-bolt maybe moved laterally on a vertical pivot relatively to the U-bolt 19 and also vertically on a horizontal pivot relatively to the U- bolt 19. By reason of lthe universal connection betweenthe'front end of the drawbar 18 and the post |1, the front end of the drawbar may be swung laterally 'and vertically and also rotated in either4 directionon the axis of the bolt 11.

To the rear ends of the heavy structural angle irons 12, 12 is Welded the cross-piece 82. outer ends of .the cross-piece'82, are welded the longitudinally extending tubular sockets 84, 85.

The socket 84 is adapted to receive the neck of a spherical head which is adapted to serve as the ball of the ball and socketV joint-86 at the lower end of ari extensible hanger, as hereinafter fully explained.

The socket is adapted to receive'at'its ends the necks of spherical heads or balls of the ball and socket joints 81 'and 88 as shown in Fig. 4. The ballY and socket joint 81 is adapted to serve as the connection to the lower end of another extensible hanger at thel opposite side of the machine.

The ball and socket joint 88 is adapted -to'serve as the connection for one end of the laterally shifting Vlink 89, as hereinafter fully explained.

By 'means of suitable guiding mechanism mounted on the lower sides of the angle` irons 12, 12 and the cross-piece 82, the circle 98 is mounted for rotation on an axis at right angles to the drawbar frame 18.`V The circle 98 has secured thereto supporting framework 9| for mounting the moldboard 69 on the circle 98 to rotate bodily therewith.

The circle 98 is provided with an'arcuate rack 92 with which meshes a pinion 93 at the lower end of a shaft adapted to be driven by Worm gearing in the housing 94.'

To the The pinion 93 is provided with la ratchet wheel 95 and associated with this ratchet'wheel is latch mechanism 95 which is arranged to .be released 'by pulling the handle 91 shown vin Fig. 2. As .shown in Figs. 2 and 4, the pull handle '91 is connected by means of the rod 93 to a link v99 which in turn is connected by the slidable rod 90 Ato 'the iatch mechanism 95. When the pull handle 91 is .released the spring will automatically snap the latch mechanism into locking posi-tion to prevent rotation of the pinion 93 and therefore when this occurs the circle will be locked in adzilsted position with the moldboard at 'anadusted angle relative to the line of draft of the machine.

When the handle 91 is pulled to release the latch mechanism 95, the circle -90 may be ,rotated by rotating the crank 2| after setting :the .shaft of the same in proper position as to the gearing in the housing |02. This gearing is connected :by the rock shafts |03, |04 and |05 to the spur gearing in the housing |05. This gearing .is connected by means of the shaft |01 and universal joints to the worm gearing in the housing 94. The worm gearing in housing 94 may be self-locking but I prefer to add the latch mechanism 5 `to securely hold the circle 90 and the moldboard 69 in adjusted positions and against movement in either direction during road grading operations.

It should be understood that the gearing in the housing |02 may be of the -type illustrated in the patent to me, F. E. Arndt, No. 2,012,463,11i1ed Aug. 26, 1930, for an Improvement in road planer or drag so that when the handle 2| ,is pushed forwardly or rearwardly the turning `of the handle may actuate either the mechanism for turning l the circle or the mechanism for the leaning o f the front wheels.

Extending laterally from the mai-n frame are brackets |08, |09 spaced above the rear end of the supplemental' or drawbar frame, Aas shown in Figs. 2, 4 and 6. Bolted to the -outer ends of vthe laterally extending bracket arms |08, |09 are vthe journal boxes ||0, as shown in Fig. -6. spaced-apart longitudinal rock shafts H2, v||.3 have their forward end portions journaled in the journal boxes ||0, ||l. Extending radially from the forward ends of the rock shafts ||2, .H3 are the crank arms ||4, which are connected by universal joints H6, l|1 to the tubes M8, H9 of the extensible hangers |20, 2| each of which comprises a rod 22 or |23. The rods 42.2, 1|23are slidable entirely through the tubes .|-|8, |:9. Each rod has a series of perforations or vtransverse openings |24, |25 which register with perforations |25, |21 in the tubes A||8, ||.9. A pin passing through registering openings in the tubes and rods holds the hangers at adjusted lengths. The lower ends of the rods |22, |23 are yconnected by means of the universal joints 86, 81 to the outer end of the cross-piece 82 at the rear end of `the drawbar frame.

The rear ends of the rock shafts |.|2, 1| -|3 are journaled in the bearings |28, 219 mounted lon the upper ends of standards which in turn are supported on the cross-piece .|3.| welded to .the tops of the diverging beam extensions i6', 46. The rear ends of the rock shafts |2, H3 are connected to worm gearing in the housing |32, |33. Large actuating wheels |34, are :connected to the worm gearing in the housing |32, |33. Consequently when the operator stands on the platform |36 at the rear end of the machine he may grasp one wheel |34 with his left hand and `the other wheel |35 with his right hand `and thus individually rock the shafts ||2, ||3 t0 .Secure adjustment in elevation and transverse inclination ofthe mo'ldboard 89.

Counterbalancing springs v| 31, |38 vare connect- .ed at .their `lower ends vto the rear end of the main trame as illustrated in Fig, 2, the upper ends of the counter-balancing springs |31, |38 vbei-ng connected by means of chains |39, |40 which in turn are connected to arcuate segments |4=| secured to the rock shafts H2, I3. rAs shown in Figs. 2 and .4 the ycounterbala'ncing `'springs |31, |38 are so Aarranged so as to act on the .rock .shafts |12, |:|3 to tend to lift "the hangers together with the rea-r end lof the drawbar and the .circle and moldboard mounted thereon, thusre` lieving `the operator of considerable work in effecting adjustments in elevation of the moldboard.

The laterally shifting mechanism for shifting lthe moldboard to its maximum extent lto one side of the machine as shown in Fig. 9 and the means for shifting the moldboard to the bank .sloping positions shown in Figs. '1 and 8, will .now be described. As shown in Fig. 4, the laterally shifting link 89 is connected to one vrend :of the cross-piece 82 at the rear end of the drawbar frame by mean-s of the ball and socket .joint 8.8. The other end of the laterally shifting linlk 89 is connected by a ball and lsocket joint |42 to the lower end of the arm |43 which 'extends radially from the ring `|44 which Ais -journaled 'at |45 to a circular guide bearing |145' secured to the channel beams l5, I6 of the main -frame I2.

Extending laterally from the channel beams Hi, I6 are plates |46, |46 and |41, |41" as .shown in Figs. 5 .and 10'. These plates may be welded rto the beams. The guide support |45' for the ring |44 is preferably made in two sections |48, |49 `and secured by means of the bolts |50, 135| between the plates |46, '|45' and |41, |41" shown in Figs. 5 and 10. The sections |48, |49 are preferably cast in one piece, then broken in two at |52, |53, Fig. 6, and the broken surfaces iitted together before bolting to the plates |45, |41, |46', |41' (Fig. 10).

`The ring |44 is also in twoI sections `with their `ends provided with radial brackets |54, |515` rbolted 'together with a plurality of shims between the brackets. This arrangement facililtata; not only `the fitting during assembly but `also the fitting of the parts to take .up wear. lThe adjustment to take up wear may be .elected by taking out `one or more shims 'between the brackets |54, |54 and |55, |55.

'I'he ring |44 is 'provided with an inner annu- Alar rack |56 with which meshes the pinion `|51 yat the forward end Aof the shaft |58 which is journaled in the bearing |59 secured to the underside of the main frame |2, as shown in Fig. v5. The shaft |58 extends rearwardly as shown in Fig. 2 and is connected to worm gearing in the housing |59. As shown in Figa, a wheel .|60 .is connected to the worm gearing in the housing |59. The wheel |50 is located adjacent the yoperators station |38 and when .this wheel is rotated, the ring |144' may be rotated and thereby Ieffect rotation of the arm |43 and translation of the laterally shifting link 189 to effect lateral shifting of the moldboard.

It should be particularly noted that the .arm |43 `can move through an angle of approximately 270 As shown in Fig. 7, the rock shafts ||2, 3 are so far spaced from the ring .|44 that not only the yar-rn |43 will clear either rock .shaft ||2 or ||3 but even the laterally shifting link 89 will'ihave ample clearance when the moldboard is moved to upright position'at either side of the machine.` In Fig. 7 the hanger |20 is relatively long, whereas the hanger |2| is relatively short. While the hangers I'Zll'and 2| are extensible in length, it is not necessary tohave the laterally shifting link 89 adjustable in length.. As shown in Figs. 6 and 7 a laterally shifting link 89 of a given length may be used in combinationr with extensible hangers either for road grading operations at the road surface or'for steep bank-cutting positions such as that shown in Fig. 7. That being true with respect to the usual limits of adjustment of the moldboard, Vit follows that various intermediate adjustments may be made by using the link 89 of a given length and adjusting the lengths of the hangers. f v

By referring tol Fig. 5', it will be seen lthat a depending bracket |83, secured to the bottom lof the box frame I2 is adapted to receive a cap screw |63' which is threaded into the bearing ring |45. The Vring bearing |45' 'is' therefore very securely but detachably secured to the box frame I2 to surround the latter while spaced therefrom. As shown in Fig. 5 a tube |8| extends downwardly and forwardly through the box frame |2' and through the ring bearing |45 and the ring |44 journaled on such ring bearing. The en'ds of rodk shaft |04 are journaled in the ends ofthe tube IBI. 'I'he tube being welded `to the box frame l2, the rock shaft |04 is journaled in fixed bearings. Y

At' the upper portion of Fig. 5 the rock shaft 23 is journaled in the bearing |82 at the upper side'of the ring bearing |45'. By comparing Figs. 1 and Z'placed end to end, with Fig. 5it will be seen that the shafts 22, 23`are connected t'o the 'mechanism for adjusting the leaning of the front wheels. It will thus be seenN that operating mechanism extends from the operators platform through the gear ring |44- to the circle for unlatching and rotating the same andthat operating mechanism alsoA extends fromv the operators platform through the gear ring |44 to the vfront wheel leaning mechanism. The operating mechanism' extending from the op- `erators station to the front wheel steering mechanism clears the top of the ring |44, vand the'rock shafts H2, |'|3, are spaced apart far enough to prevent arm |43 on the ring |44 ever striking against theV same, evenv when the moldboard is in the upright position shown-in Fig. '7.

-By comparing Figs.Y 6Y and 9 it can .readily be seen that by removing the pins at |26 and |21 in Fig. 6 and turning the ring gear |44 in an anti-clockwise direction the moldboard may be .shifted transversely of the path of the machine.

Aftery the arm I|4 has been swung into such position that the aperture in the tube |I8 will register with next to the last hole inv the rod |212, further swinging of the arm ll'4`lmay be relied on to aid the arm |43 in moving the moldboard transversely of the roadway or toward the right as viewed in Fig. 6. When the aperture in the tube ||9 registers in the last hole in the rod |23, the pin |21 may be reinserted whereupon the worm gearings in the casings |32, |33 vand |59' will lock the arms ||4, H5 and |43 in adjusted positions and the hangers |20 and |2| will cooperate with the link 89 to lock the drawbar rigidly to the main frame.

moldboard will be held `rigidly connected to the Therefore the main frame because of the latch mechanism'.

` While the' rear end of the moldboard is on road 'surface'and the pin |26 still released the anti-clockwisemovement of the arms 43 and lH5 may rvraise the right hand end of the moldboard up olf the road surface until the aperture inthe tube l |8`reg`isters with thelast aperture |24V in the'rod |22 whereupon the pin |26 may be reinserted and then the final movement of the moldboard may be effected my manipulation of It should be particmarly noted that the center of rotation of thev ring gear |44 is on a center the axis of which extends longitudinally through the upper portion ofthe main frame I2. The center of`rotation of the ring gear |44 is therefore in a relatively high position which enables the radial arm v|43 to bemoved to the relatively high position shown in Fig. 7, while the length of such arm |43 is such asnot only to clear the rock shafts |2fand ||3 between which it is movable as show nl in Figs. 2, 6 and 9 but also enable the link 89'to clear-such rock shafts as shown in Fig. 7. In other words, by elevating the center of rotation of the arm 43 the latter together Vwith the upper end of the link 89 may be moved to such elevated positions as to enable the moldboard'to more readily clear the road vsurface as it is moved from the road grading position vshownin Fig.'9 to the upright bank cutting position shown in Fig. 7., By referring to Fig. 7 it can be seen that when an approximate horizontal plane is extended throughthe rock shafts lll-2,. ||3,"it will be adjacent the axis of rotation of the gear ring, |44 andbelow the arm |43 and 'particularly*below the upper ends of the arm |43 and link 89. `When the arm |43'is Ymoved *from-the' positionfshown in Fig. 9 to the position shownin Fig. 7, it is projected upwardly through the` space between the rock shaft 3 and the `gear ring |44; likewise the link 89 is projected upwardly into Vsuch space. The highlift of the grader blade from the road surface when the gradergblade isfto be moved from road grading moldboard shown in Fig. 9.

In Fig. 9vthe right-hand rear wheel is shown in dotted `lines designated |4. In, such maximum laterally extended position,V the circle operating mechanism may shift thermoldboard to any desired anglerelative to the line of draft. While Fig.l 9 shows the moldboard horizontal for hori- Zontally trimming berms or shoulders of roadways the right-hand end of the moldboard as viewed inV Fig. 9 may be inclined downwardly for ditch-work. Adjustments for ditch-work may be made by rsubstituting a longer hanger for the one designated |2| in Fig. 9 and adjusting it to its full length and then release the pin |26, turn the arm |43 anti-clockwise, and finally replace the pin |26 after turning the arm ||4 until apertures in the tube ||8 and rod |22 register.

When the moldboard is to be shifted to an upright bank sloping position at the left-hand sideof the machine or to a position opposite to that shown inA Fig. 7, the diagonal link 89 is first reversed by connecting the socket joint 8'8 to the spherical head which is shown in Fig. 7 projecting from thev tubular socket 84. This may readilyy be done while the moldboard 69 is in the road grading positionr shown in Fig. 6. The grader blade may then be shifted to its extreme left-hand road grading position opposite to that shown in Fig. 9, when the arm |4'3 will be at the left of the ring gear |44 as viewed in Fig. 9 andl the link 89 will hang vertically with itsv lower end or socket joint E8 connected to the spherical head projecting rearwardly from the tubular socket 84. In the deft-hand upright cutting position of the moldboard the upper end of the link 89A and the upper end of the arm |43 will be 1'0- cated above a horizontal plane extending through the top ofthe vehicle frame; In both the righthandupright positionof the moldboard andl inv the left-hand upright Apositiony thereoftheA link 89 will be in suspension. It will thus be seen that the highvlift from the road surface may be had preparatory to adjustment of themoldboard to upright bank cutting position at either side of the machine.

It Will thus be seen that vby the use of VInechanism for turning the arm through an anglev of atleast 270, in co-operation with extensible hangers the moldboard may be adjusted to upright position on either sideof the machine to any bank-sloping positionr at'either side of the machine where' the cutting edge of the moldboard will be entirely outside of the path of travel of the machine. Furthermore, a wide range of lateral-adjustment of the moldboard is available for shoulder` trimming and berm work and even fordownwardly sloping ditch-work at theedges of 'eitherside of theroadway.

While hangers of extensible lengths' are preferable, detachable hangers of nxed lengths may be used throughout a wide range of adjustments by reason of the wide rangeof adjustment of the ring gear |44 and the arm Ult.l VFor instance, il the hanger |2| is of fixed length it can readily be used in co-operation with the linkv 89 andl arm |43-for adjusting the moldboard to aV laterally shifted position where the hangerA |20 yof fixed' length' mayv be replaced by another hanger having a fixed length equal toy the Vlength of the hanger |20 shown in Fig. '7;y Then the moldboard' may be adjusted to the upright position shown in Fig. 7.

The flexible connection between the frontend of the' drawbar 10 and the upright post' comprising the eye-bolt and the U-bolt'1'9`, is describedand claimed inY my co-pending application S. N. 391,369, led May 1, 1941, for an' Improvement in road graders. 'I-he curved ends-of the arcuate rack with which the pinion 'meshesas shown in Fig. 8, are shown; fully described-and claimed in my co-pending application S. "Ni 381,857, filed March 5, 1941, for an Improvement in roadgraders. .Y Y

. Obviously those skilled in the art may' make various changes vin the details and arrangement of parts without departing from thespirit and scope of the invention as defined by the claims hereto appended, and I therefore wish not toy be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment or my inventiomwhat I desire to secure by Letters Patent of the United States is: y

1'. In a-road grader, the combination with a vehicle frame having a laterally expanded rear end. portion and a narrow elongated forward portion, of a drawbar pivotally connected at its forward end to the forward end of said frame, brackets extending laterally from the narrow elongated portion of said vehicle frame, crank arms` journaled on said brackets on spaced axes, y

mechanism for actuating said` crankl arms on such spaced axes, spaced-apart hangers one connected between one crank arm and one side ofthe free endl of said drawbar and the other connected between the other crank arm and the other side of the rear end of said drawbar, an arcuate rack, mechanism mounting said rack on said frame and guiding the same relatively thereto alongvthe arc of aY circle surrounding said vehicle frame, mechanismcomprising a linking connecting said arcuate rackto one side of the free end of saiddrawbar, means4 comprising a pinion meshing with said arcuate rack to move the sameY arcuately to effect lateral shifting Yof said drawbar together with the road-Working implement carried' thereby, and means. for actuating said crank arms individually and independently of the actuation of said arcuate rack.

v 2. In a road grader, the combination with a vehicle frame, of a drawbar flexibly connected at itsforward end to said'vehicle frame, a road working implement carried by said drawbar, spaced-apart hangers pivotally connected at their lower ends to said drawbar, spaced-apart rock shafts mounted `on opposite sides of said vehicle frame to extend longitudinally thereof, crank arms extending radially from the forwardv ends of said rock shafts and p ivotally connected to the upper ends of saidhangers, mechanism connected tothe rear ends of said rock shafts to rock the same individually, an arcuate rack, means for guiding said rack along the arc of a circle surrounding said vehicle frame, mechanism comprising a link connecting said rack to one side of the free: end ofvsaid drawbar, and means for driving saidv rackarcuately toeffect lateral shifting of the drawbar together with said road working implementwhile the free end of said drawbar is suspended from said vehicle frame by said hangers and radial crank arms. f

3. In aroad grading machine, the combination with a vehicle frame, of a drawbar frame, a grader blade carried by said drawbar frame, extensible hangers connected to said drawbar frame,

. brackets extending laterally from said vehicle frame, crank arms connected to said hangers and mounted on said brackets in spaced relation to the sides of said vehicle frame, mechanism for swinging said crank arms individually on longitudinal axes spaced from the sides of said vehicle frame, va tertiary frame of arcuate shape movable along the arc of a circle which encircles said vehicle frame, bearing means on said vehicle frame supporting said tertiary frame' for arcuate adjustment, a' rack on said tertiary frame, pinion meansy co-operating with said rack to adjust the tertiary 'frame relative to said vehicle frame, andV medhamsm1 'comprising a link interconnecting said tertiary frame and; said drawbar frame to effect, laterally shifting of the vgrader blade 4 when saidtertiary frame is moved arcuately as aforesaid; the construction and arrangement being such.that adjusting the hangers to different lengths and actuating the same in co-operation with said lateral shiitingthe grader blade maybe adjustedto banksloping position at cneside of themaohine.n Y u,

4. AIn .a roadgrader, theucombination with a vehicle iframe, comprising an elongated bcxvlike portionoi a ring surrounding said ,boxrlike portion, a radial armV on said ring, a drawbar exibly connected at one end, to saidvehicle frame, a graderk blade .carried bysaid drawbar, spacedapart, hangers each extensible in length and each connected to said drawbar, a link connecting said ring-ltosaid drawbar, brackets extending laterally from saidvehicle frame, crank arms mounted on said ,brackets and connected to said hangers to swing on longitudinal axes spaced from the sides of said vehicle frame, mechanism forswinging said .Crank arms individually, and means for ifotating said ring around saidvehicle frame to efect'lateral shifting through sai d radial arm and, saidlink oi the grader blade, `the construetioniandsarrangement beingsuch thatby ad justing the lengths of said hangers and operating said crank arms and rotating said ring the grader blade may be radjusted to various laterallyshifted positicns at either side of the machine or to various steenv bank sloping positions at either .Sdeof the machine including upright positions spaced laterally from either side of the vehicle frame and outside of the path oi travel thereof. 5. In a road grader, vthe combination with a vehicle frame, of a supplemental frame connected .theretd la vroad working implement carried by said supplemental frame, spaced-apart hangers connected to said supplemental frame, means comprising spaced-apart rock shafts mounted on said vehicle frame for actuating said hangers individually, a ring surrounding said vehicle frame vand having an internal gear, a crank arm eX- tending radially from said. gear ring, a linkrrcon: necting vsaid crank arm yto one side portion of the f re e;ond of said supplemental frame, and -mechanismcomprising a pinion meshing v,with Said internal gear td effect. rotation Of tho/Same -toslaterally Shift thevsupplemcntal frametogether @with the 'roadrworkins implement. carried there.- by, the Construction and arrangement being such that the rock shafts and gear ringmaybero- -tatd Q11 different axes and that thehaneers may b e attuated dindex2erldently of the Crank armarid the latter ymay be actuated independently of the hangers. v .u v 6- In. a road. graden, the =0I1f1l riatlori with. a yehiclfrafme, of a supplementalirame connected thereto, a grader blade carried by said supplemental' frame, a tertiary frame surrounding Asaid vehicle frame, a link connecting `said tertiary frame teorie side offthe free end ofsaidsupplef rfnental frame, means for actuating said tertiary vframe arcuately to effect lateral shifting oisaid supplemental 'fr'ameV together withVv the grader blade 'carried thereby, extensible hangers one connected to one side of the free end of said supplementalframe and tlie'other connected to the'` other side'of the free end of said.` supplemental frame, twocrank arms' oneconnected to one ofVVV said extensible hangers and the other connect/edv to `the o therextensible hanger, mechanism for. suppqrting Said crank`arnis on saidvehicle frame for, rotationj on. spaced longitudinal axes each in spaced relation to the axis of rotation of said tertiary frame, and mechanism for actuating said crank arms individually but in cooperation with the actuation of said tertiary frame to eiect adjustinent ofthe grader blade to steep bank slop-4 ing position with the link in suspension. l

7. -In a road grader, the combination with a vehicle frame, of a drawbar connected thereto, a road working implement carried by said drawbar, means comprising hangers supported by said vehicle frame and spaced laterally from the sides thereof for supporting said drawbar from said frame and for adjustment relative thereto, laterally shifting mechanism between said Vehicle frame and said drawbar comprising a ring guided around said vehicle frame on arlongitudinal axis spaced Irom said hangers and having a radial arm connected by a link to one side of the free end portion of said drawbar, said supporting means seing separate from said laterally shifting mech--` anism, and means for actuating said hangers individually on longitudinal axes each spaced apart irom'the axis of rotation of said ring.

In a road'grader, the combination with a vehicle frame, of a drawbar fiexibly connected at its iront end to the iront end oi' the vehicle frame, a ymold-board carried by said drawbar, spacedapart hangers pivotally connected at their lower ends to opposite sides of4 the free end,V of said drawbar, actuating arms pivotally connected to said hangers and mounted on said vehicle frame Ior rotation on spaced-,apart axes extending longitudinally of said vehicle frame, mechanism for actuating said arms individually, an annular gear, mechanism on said frame for guiding said annular gear lor rotation aboutsaidrframe on an=axis extending longitudinally thereof, a radial arm carried by saidannular gear to rotate therewith to various positions between the aforesaid spaced-apart axes to extend laterally from either s ide ofthe vehicle frame and to positions above an approximate horizontal plane extending through the said spaced-apart axes, the positions oflsaidradial arm intermediate such laterally extending Vpositions being 'runder the vehicle f raniameans' i'or rotating said annular gear' to shiftsaid radialarm from one position'above Vsuoli horizontal plane Vat one side Vof said frameto another position above such plane atthe other sideoi' said i`rame,and ya link connectable to either sidev of the'free end of said drawbar and pivotally connected to said radialy arm, said link being in' sspension when theY moldboard is Ain steep'jbankeutting position atether side of the machine. f i y 9.`In a road grader, the combination witlia vehicle frame, ofa drawbar flexibly connected at V.its vforward end to saidvehicle frame, a road working implement` carried 'by said,YY drawbar, spacedapart hangers pivotallyconnected at Vtheir lower ends to said drawbar, spaced-apart rock shafts/mounted on opposite sides of said vehicle frame to extend longitudinally thereof, crank arms extending radially from the forward ends of saidrocklshafts and pivotally connected to the upper. ends of said hangers,A mechanism connected to the reariends of saidroek shafts to rocktiie same individually, .an arcuate rack, mea'nsfV for ggf; tpgaid Tack M9115' the are ofY a circlesurrounding saidvehicle frame, an arm extending fadiallypfiem-,Said arcuate-ratsam. movable .with Fh? latter t0 Positions .on opposite, sides 'ofv Vsaid vehicle Yframe above a horizontal plane extending through said rock shafts,; saidgarm-being movable V past the Ainner sides oit-said''rockshafts a link connecting said arm on said arcuate rack t one side of the free end of said drawbar, and means for driving said rack arcuately to effect lateral shifting of the drawbar together with the road working implement carried thereby, such lateral shifting being adapted to co-operate with the actuation of said hangers to adjust the road Working implement to upright bank cutting position with said arm above said horizontal plane and said link inside of the adjacent rock shaft without interference with the latter.

10. In a road grader, the combination with a vehicle frame, of a drawbar flexibly connected at its forward end to the front end of said vehicle frame, a moldboard carried by said drawbar, spaced-apart extensible hangers pivotally connected to said drawbar, crank arms pivotally connected to the upper ends of said hangersfrock shafts connected to said crank arms-and journaled on said vehicle frame for operation on 1,:

spaced-apart axes extending longitudinally of said Vehicle frame, mechanism for actuating said rock shafts individually to effect adjustment of said crank arms and hangers to change the position of said moldboard relative to said Vehicle frame, laterally shifting mechanism comprising an annular gear encircling said frame and connected by a radial arm and a link to ysaid-drawbar' with the gear guided for projection of one end of said link upwardly through the space ber tween said gear and the adjacent rock shaft, and means for rotating said annular gear in cooperation with the actuation of said hangers to effect adjustment of the moldboard to upright bank cutting position.

1l. In a road grading machine, the combination with a vehicle frame, of a drawbar having its forward end flexibly connected to said vehicle frame, extensible hangers pivotally connected to said drawbar, mechanism comprising spacedapartl rock shafts mounted on said vehicle frame and connected to said -extensible hangers, an operators station on said vehicle frame, mechanism for operating said rock shafts individually from said operators station, an arcuate rack, means for guiding said rack along the arc of a circle surrounding said vehicle frame, the center of such circle being spaced above the bottom of that portion of the frame above the rear end of the drawbar, an arm extending radially from said arcuate rack and movable to positions above a horizontal plane extending through said rock shafts, a link connecting said arm to one side of the rear end of the drawbar, and mechanism operable from said operators station for moving said rack arcuately along said guiding means to eifect adjustment of the moldboard to upright bank cutting position by co-operation with the lengths of the hangers and the individual actuation thereof.

12. n a road grading machine, the combination with a wheel supported main frame, of a drawbar frame flexibly connected thereto, a moldboard carried by said drawbar frame and adapted to occupy a road grading position, extensible hangers connected to said drawbar frame, crank arms supported by said main frame and spaced from opposite sides thereof, said crank arms being connected to said hangers, mechanism for actuating said crank arms on longitudinal axes spaced from opposite sides of said main frame,

through a wide angle of over to project said arm and the upper end of said link above a hori- Zontal plane extending through said spaced axes, a horizontal shaft extending through the rear portion of said main frame, a pinion on the front end of said shaft meshing with said annular gear, and mechanism for rotating said shaft to effect operation of said laterally shifting mechanism in co-operation with the actuation of said hangers to secure adjustment of the moldboard t0 upright bank cutting position.

13. In a bank 4cutting machine, the co-mbination with a vehicle frame, of a drawbar flexibly connected thereto, a grader blade carried by said drawbar, rock shafts journaled to said vehicle frame on axes spaced from the sides of the frame, crank arms on said shafts for rotation in planes extending transversely of said vehicle frame, hangers connecting said crank arms to said drawbar, mechanism for actuating said crank arms, an arcuate rack, an arcuate bearing on said main frame for guiding said rack along an arc of a circle surrounding said vehicle frame, the center ofv such circle being in a relatively high position extending longitudinally through said vehicle frame, a link connecting said arcuate rack to one side of the rear lend portion of said drawbar, and mechanism comprising self-locking Worm gearing for moving said rack along said arcuate bearing to effect through said link lateral shifting of the grader blade to adjust the latter to steep bank cutting position in co-operation with the actuation of said hangers, the construction and arrangement being such that the upper end of said link may be projected to a relatively high position by reason of the relatively high position of the center of said circle thereby enabling the grader blade to be elevated throughout its length from the road surface sufiiciently to clear the latter when such grader blade is being moved from und-er the vehicle frame to bank cutting position at one side thereof.

14. In a road grading machine, the combination with a vehicle frame, of va drawbar flexibly connected thereto, spaced-apart rock shafts journaled to said frame on spaced-apart axes extending longitudinally of said vehicle frame, extensible hangers pivotally connected to said drawbar, crank arms on the forward ends of said rock shafts and pivotally connected to said extensible hangers, an annular gear, mechanism for guiding said annular gear to rotate around said vehicle frame on an axis extending longitudinally through the upper portion of said frame with the axes of said rock shafts spaced laterally from the axis of rotation of said annular gear, a radial arm on said annular gear and movable with the latter to positions extending upwardly and diagonally outwardly above a horizontal plane extending through said rock shafts, a link connecting said arm to one side of the rear end of said drawbar, an operators station, mechanism for actuating said rock shafts from said operators station, and additional mechanism for actuating said annular gear from said operators station, the construction and arrangement being such that the upper end of said link may be projected above a horizpntal plane extending through the top of the machine by reason of the relatively high position of the center of rotation of said annular gear although the said arm is of such length as to enable the outer end thereof and the upper end portion of said link to move past and clear the rock shafts on either side of the machine thereby effecting suicient `elevation of the grader blade from the road 'surface to clear the same when being moved to steep bank cutting position at either side of the machine.

l5.` In a road grader, the combination with a vehicle frame comprising an upper narrow elongated portion, of a ring guided around said upper narrow elongated' portion, a radial arm on said ring, a drawbar flexibly connected at one end to said vehicle frame, a grader blade carried by said drawbar, brackets extending laterally from said narrow elongated portionY of said frame, spacedapart rockshafts journaled to said brackets, radial arms on the forward ends of sa-idrocksh'afts, extensible hangers connecting said radial arms to the free end of said drawbar, alink connecting .the first-named radial arm to one side of the free end oflsaid 'drawbar, mechanism for rotating said ring on a center the axis of which extends longitudinally through said narrow, elongated portion of said Vehicle frame to move saidrrst-named radial arm and thel upper end of said link topositions above a horizontal plane extending through the top vof the Vehicle frame, and mechanism for actuating said rock shafts individually to enable the hangers adjusted to diiferent lengths to co-operate withthemovement of. said link to eect adjustment of Vthe grader blade from road grading position under the vehicle frame to upright bank cutting position at one side of said frame. 16. In a bank cutting machine, the combination with avehicle frame, of a drawbar exibly connected at its forward end to said vehicle frame, a grader blade carried by said drawbar,

an arcuate rack, means for guidingl said rack along an arc of a circle surrounding said vehicle frame in an upright plane fixed relative to said frame, said rack being confined by said guiding means to adjustment in such upright plane, mechanism comprising a suspension link connecting said arcuate rack to one side of the free endr of said drawbar, spaced-apart hangers piyotally connected at their lower ends to said drawbar, mechanism comprising rock shafts mounted on said vehicle frame and spaced laterally from opposite sides of the path of said arcuate rack for actuating said hangers, and means for actuating said arcuate rack to project the upper end of said suspension linkv upwardly through the space between said path and one of said Vrock shafts, the construction and arrangement being such that the actuation of said rack co-operates withthe actuation of said hangers to effect adjustment of said grader blade to steep bank cutting position while said link remains in suspension. f

17. In a road grader, the combination with a vehicle frame, of a drawbar ilexibly connected at its forward end to said frame, a grader blade carried by said drawbar, -a ring gear, mechanism for guiding said ring gear in a circle surrounding said iframe in an upright plane fixed relative to saidY frame, said guiding mechanism permanently conning said ring gear to adjustment in such upright plane relative to said frame, a radial arm extending from said ring gear, a link connecting said arm to one side of the rear end portion of said drawbar, spaced-apart hangers pivotally connected at their lower ends to opposite sidesrof the rear en d portion of said drawbar,

same may be swung transversely of the vehicle` frame on the aforesaid longitudinal axes separately from and independently of the longitudinal axisrovffrotation of said ring gear.

- FRANKLIN E. ARNDT,

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