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Marchll', 1938.- c. A. GUsTAFsoN 2, 1_ 09,794 ‘ROAD MACHINE Filed March 8,( '1954 _L l0 Sheets-Sheet l " _A TToRNEY. March l, 1938- c. A. GUsTAFsoN 2, l 09, 794 ROAD MACHINE fFiled March s, 1954 l0 Shèets-SHeet 2 March l, 1938. 2,109,794 c; A. GUsTAFsoN ROAD MACHINE Filed Maroì’í 8, 1934 l0 Sheets-Sheet 5 MVN _mi m l H.. .f BY m ßn„mé/M n .R. 0Y mVf M/,E MT March 1, 1938. c, A. GusTAFsoN . 2,109,794 ROAD MACHINE Filed March 8, 1954 10V sheets-sheet 4> 236 234 56 237 49 . . I _5 fifa/7 Byéä É 5%/ffî e, A TTOR EY. . March 1, 1938. c. A. GUsTAFsoN ROAD MACHINE ïFiled March s; 1954 2,109,794 ~ _ 1o sheets-sheet 5 March l, 1938. C. A. GUSTAFSON 2,109,794 .V ROAD MACHINE Filed March 8, 1954 lO Sheets-Sheet 6 @s INI/ENTOR. BY (arl I7. íw?afson ~ .1 J f MATTORNEY. ¿ff/27M, March l, 1938. l Q_ A_ GUSTAFSON ROAD MACHINE Filed March 8, 1954 2,109,794 ` 10 Sheets-Slíeet 7 A TTORNEY. Marth'l, 1938. c. A. Gus'rAFsoN 2,109,794 " ROAD MACHINE 'Filed March 8, 1954 ' 1o sheets-sheet 8 m J ß .Jl u, r/J/v33, 1_ m w, a» I . 733E/37 ßóf4.J d/ 4Z E „ „„ M_.3u E@5 _ s) __ .y . l3 JM 3x Ml 37 3%# „E „y 4â_ ..J 32J68, 56N“ „Ln 3` i.;347i _ m 63 ,fb 534»Ã zl „y nià?,., 3s y” M , 3 73776.) 33MB I6 364640 432 426 428 4.14 4 3l 54 m m,H H. [,wWßi.mMN /@fm.M/Y. TEJ, March l, 1938. A. GUSTAF$<3N 2,109,794l ROAD MACHINE Filed March 8, 1934 10 Sheets-Sheet 9 36';253, 238 362. l 45] I 76 Z8 A TTORN March Í, 1938. c.' A. GUsTAFsoN 2,109, 794 ROAD MACHINEv Filed March 8, 1934 B vY. - raH l@ Sheets-Sheet l0 ifmmf?, @ ._„nv A.6mw n .R.” Patented Mar.. 1, 193s _ 2,109,794 ’ vUNITED STATES PATENTA OFFICE " 2,109,794 ROAD MACHINE Carl A. Gustafson, Peoria, lll., assignor to Cater pillar Tractor Co., San Leandro, Calif., a cor poration of California Application March s. '1934, serial No. 714,554 5 Claims. (c1. 19a-11s) ' Description 0f figures The present invention relates to road ma 5 chines. and more particularly to the prbvision of ~ Figs. 1 through 3 are general _views of the ma an improved elevating grader construction. chine. , It is an object of the invention to. provide an Fig. 1 is a left side elevation. improved elevating grader having a weight dis Fig. 21s a rear end elevation. tribution which places a substantially uniform ' ground pressure on each ground-engaging sup port. « _ sion, and having the rig/ht rear wheel in extended Another object of the invention is to provide an improved elevating grader which is adapted for use with carriers of dift'erent lengths; and position to compensate for the additional car rier length. ` which__includes adjusting means for controlling , the weight distribution of the grader to provide a substantially uniform ground pressure on each ` . Fig. 5 is a transverse vertical section looking toward the rear of the machine and taken in the rier is omitted from the view. `- ' Another object ofy the invention is to provide an improved elevating grader having compara 20 _ ,f ' _ f . ` Fig. 6 is a' horizontal sectional‘view of the front wheel and axle assembly taken in a horizontal plane indicated‘by the line 6_-6 in Fig. 1; the tively light draft and which can be easily guided. Another object of the invention> is to provide an improved elevating -grader- which can operate on level ground without side draft.“ lo Fig. 4 is a plan view of the frame construction. plane indicated by line 5--5 in Fig. 1. The car- u v15 ground-engaging support with any length -car rier. Fig. 3 is a schematic view similar to Fig. 2, il lustrating the carrier equipped with an exten draft pole being shown in elevation. ' » I Fig. l7 is a sectional view taken in the plane of 20~ the line 1-_--'l inFig. 6. ' ' y ` Fig. 8 is a rear elevationalview of the rear ' " .Another object of the invention is to provide an improved elevating grader in which the front 25 wheel and axle assembly hasfull oscillation in wheel and axle assembly with certain portions shown in section. -, horizontal andyertical planes. >,Another object of the invention is to provide . . an improved elevating grader which can be turned around sharply, and at least within a diameter , . " 25 Fig. 9 is a fragmentary section taken on the line 9-9'in Fig. 8. ' - Fig. 10 is a fragmentary side’ elevational view’y ‘l of the center of the-carrier,~ and a portion of t " frame cooperating therewith. The view is in direction looking from the rear end of the ma' ¿30 substantially equal to the grader length. " _Another object of the invention. is to provide an improved elevating grader in which the sup chine. _ . ` , Fig. 11 is.a fragmentary horizontal sectional ports therefor are adjustable' to _ prevent, the ._ view of the> mechanism illustrated in Fig. 10. grader from slipping into a cutf . Figs. 12 through 15 illustrate the power unit, 35 35 - Another object of the invention is to provide _ an improved elevating grader having ground sup- - including driving mechanism for the carrier belt ports constructed to remain clean during opera and the power control mechanism. tion, so as to promote light draft. Another object of the invention is to provide an planes indicated by lines i2-_|2, |2'--I2'in Fig. > . _ , Fig. 12 is a horizontal sectional view taken in 40 'improved elevating grader having the power unitÀ mounted to simplify the drive connection there-. Fig. 13 is an elevational view of the front end 40 of the power unit,4 similar. to that shown in Fig. from, to aid in obtaining correct weight distribu- \ 5; certain parts being shown in section to illus tion, and for accessibility for servicing and repair. ` Another object of the invention is to provide ~ 45 an improved elevating grader having an opera! tor’s seat with the grader controls grouped with respect to the seat so that all operating adjust ments canbe made by an_operator sitting in the trate the .construction more clearly. drive for the carrier belt and for the power con- ' trol mechanism. Another object of the invention is to -provide .an improved elevating grader constructed to pro- ' ~ vide economy in manufacture. and assembly. . Fig. 14 isa fragmentary' sectional-view taken 45 in the plane indicated >by line- id---M- in Fig. 12. Fig. 15- is a _schematic view illustrating the ~ ~ „ » i _ Figs. 16 through 18 illustrate a second modiii- 50; cation of the invention in which the driven parts of the grader are operated by a power take-oir ` from the draft vehicle. ‘ / ' . Other objects will Íappear'as the, _descriptionv i. Fig. 1_6 is a schematic plan view. ""¿5'5 progresses. . ' ffFig.; 17¿ is a front .elevation with the support- 55 2,109,794'. ing connection from the frame to the front wheel and axle assembly shown in section. Fig. 18 is Va. schematic view of drive connec tions from the power take-01T to the power con trol mechanism and to the endless conveyor belt. Description of machine ` The elevating grader disclosed herein is espe cially designed to obtain simplicitymf structure while providing complete flexibility in maneuver plate 26 riveted to the top faces thereof. Front bolster 21 (Fig. 1) is bolted to the bottom faces of side members 2|, 22 to provide a. connection to the front wheel and axle assembly, which is _described more specifically hereinafter. Side «members 2|, 22 are of similar construction and each comprises I-beam 3| (Fig. 5) having oppo site plates 32 welded betweenl the respective pairs of flanges thereof to provide a rigid tubular con struction for each of side members 2|, 22. ing and adjustment, and to obtain eñicient op eration. To accomplish the above objects, the various parts of the machine have been relocated ' from the conventional locations thereof found in known elevating graders, and an improved auxiliary frame members connected thereto 'to support various parts of `the elevating grader. Adjacent the front (Figs. l and 4), cross channel 36 is secured to side members 2|, 22 by bracket 31 and extends outwardly to either side thereof. At its left end, channel 36 is connected by ver frame and frame suspension are provided to obtain correct weight distribution. The frame is generally V-shaped, converging at the front end to provide a universal connection with the 20 front wheel and Aaxle assembly at the center of Frame members 2|, 22, which converge at their front ends, and are arched upwardly, form the back-bone of the` frame, and have a plurality of tical post or angle 36 to the front end of longi At the rear, the frame is connected tudinal channel 39, which extends rearwardly at widely spaced points to the rear wheel and axle and is connected to side member 2| at its rear assembly which serves to maintain the frame in a stabilized condition irrespective of oscillation end by vertical post 4| (Figs. 4 and 5) and by gusset plate 42 welded around side member 2| the axle. 25 of the front wheels during travel over obstruc tions. « Also, the engine is located in its most advan ‘ and riveted to post 4|. Similar'spaced frameworks are provided, ex tending transversely of the grader at the center to form a-support foryarious carrier adjusting y. jacent one of the rear wheels, and, consequently, mechanisms; the space between the frameworks 30 in back of the carrier. In this position, the engine _ accommodating the carrier. Below side’members tageous position, directly over the rear axle ad- ~ serves as a counter-balance for the loaded car rier, which extends outwardly past the otherf of the rear' Wheels. To compensate for varying lengths of the carrier, the other of the rear wheels 35 is extensible to a plurality of positions so that with any length of carrier a uniform pressure is transmitted from each of the _wheels to the ground. Y Such arrangement of the parts to4 obtain cor 40 rect weight distribution is important because _ when uniforml ground pressure per square inch is obtained ät all the wheels, the power required to pull the grader is reduced inasmuch as `no The grader can be ` 'wheel sinks abnormally. 45 guided easily, is adapted forneasy, short turning, and side draft is eliminated. ' The location of the engine is advantageous in other- respects, as well as in obtaining correct vweight distribution. By yirtue of locating the 50 engine in back of the carrier, alv direct drive is obtained from the engine to the driving drum at the outer end of the carrier; and the drive ' connection is locatedienti'rely on the~trailing side of theA carrier. In this position, the drive con 55 nection is not injured if the carrier strikes‘an obstruction. Moreover, the engine does’inot ob-. struct the operator’s vision, and is placed in an 60 accessible location for servicing and repair work. The elevating grader will now be described in detail, and other advantageous features thereof v- will be apparent from the description. Frame 2|, 22 and in transverse alignment with post 4I, is -cross channelt 43 riveted at one end to plate 42 and atthe other end to plate 44, welded around side -member 22. Post 46 is riveted to angle 43 and plate 44, and' extends both above and below side member 22. Parallel to channel - 43 and above side members 2|, 22, cross angle 41 is secured to plate“ and to post 46 at one end, and to plate 42 at the other end. As later described, angle 41 provides a 'support for certain of the carrier lift mechanisms. _ At its upper end post ¿46 (Figs. 2 and 5) is connected by means of gusset plate 46 to inclined angle 49 which extends downwardly toward the opposite side of the frame and is secured to plate 42. At its lower end, post 46 (Fig. 5) is con -nected by gusset 5| to upwardly extending angle 52 secured at its upper end 'to channel 43. Thus, . post 46, channelv 43, angles 41, 46, 52, and plates. 42, 44, form a framework at the rear side of the carrier; and a similar framework (Figa l and 4) is formed at the front side of the carrier. Such similar »framework comprises channel 43A, post 46A, angles 41A, 49A, and 52A, and. plates 42A and 44A. At the top, posts 46, 46A (Figs. l and 5) are connected by cross _angle 56; and adjacent angles 41, 41A are connected by cross angle 51. Betweenfthe respective ends of angles 4,6, 46A, diagonal brace members 56 are provided. -Channel 43A (Fig. 4) at its right end is con nected by plate 44A and post 46A, to longitudinal channel 6| which extends forwardly and is con nected by a suitable bracket to the right end of As noted above, the iframe> of the machine is . frontcroœ channel 36. Angle 62 serves as avbrace 65 generally lV-shaped and includes opposite tu between channels 6| and 36. From the top of bular side members which are widely spaced at post 46A (Figs. 1 and 4), bracingangle 63 ex their rear ends and converge at their front ends. Intermediate their ends, immediately ovei- the carrier, the side members are arched to provide 70 ample clearance in any adjusted position of the carrier. » - ' tends, downwardly to the iront end of channel 6|: and4 from the lower end of post 46A, bracing angle 64 extends upwar’dly to channel 6|. Be neath the carrier, bracing rod 66 extends from Side frame members 2|, 22 (Figs. 1, 2, 4, and ' the bottom'of post 46A to bracket 61 (Fig. 1) se r‘5) have their rear ends bolted to brackets 23 cured to the bottom of post' 46, and thence up welded on rear axle 214, "and converge inwardly wardly to rearv axle 24. Thus, the spaced frame 76 (Fig. 4) and have their front ends Joined by works for supporting the carrier and theadiust 2,109,794 _ Posts 38 and ¿4| (Fig. 1) support the plow in a manner later described, and are connected inter 5 mediate their ends, by longitudinal angle 1| con movement by bolt |09A, in the manner described `above. Thus, shaft || 6 and left front wheel || 8 _ 1| is also connected by -suitable gusset‘s to in clined angles 49, 49A of the spacedf‘carrier sup _ I 3` prevent side slipping of the grader. _At~ the left end of axle |0|, shaft ||6 is clamped _against nected thereto and supported intermediate its ends by post 12 mounted on channel 39. Angle 10 porting framework. _ tion wheel || 8 in any selected- one of a plurality of extended positions, as indicated in phantom lines. In’ working on a side lhill or when the grader is apt to slip into a cut, wheel«.| I0 can be extended to bear against the bank of the cut tov 5 . ing mechanism therefor are suitably connected by bracing means to frame members 2|, 22. _ are extensible,_an'd are secured in adjusted po ` 10. sition with respect to axle |0| by spaced fasten At the rear end of the frame, a framework is provided for mountingthe power unit, compris ing spaced channels 16 (Figs. 1, 2, and 4) con ingmeans. It is to be noted that stub shafts |06., ||6 are interchangeable» so that the rightl front l nected at their rear ends (Fig. 4) by cross-piece wheel can be extended if desired. Obviously, both 15 11 and at their front ends> (Fig._5) by cross-piece 18. The -front ends of channels 16 and cross piece 18 are connected by vertical posts 19 to cross portant point being that ll have provided means' front wheelsl can be made adjustable; the im 15 whereby the spacing between the front wheels can - angle 8| ¿(Fig. 4) secured at its ends`by welding to ‘ be adjusted, to provide a proper path over which thefront of themachine can travel, so that the respective side members 2 I ,» 22. Inclined angle 62 20 (Figs. 4 and 5) connects _cross-piece 18 to angle plow can properly do its work. 'Front wheels III, ||8 are drum type wheels 8|. Adjacent its right end, angle 8| has- the -verti 4cal portion of angle 83 secured thereto, whichv with crowned self-cleaning tires or rims. As extends downwardly from angle 8| and then rear- ' wheels III, ||8 are similar, only one will4 be de scribed in detail. Wheel ||8 (Figfß) comprises wardiy to axle 24. Angles 8| and 83 provide a 25 -support for a platform and steps 85 leading to hub I2| having imperforate drum members |22 rivetedto annular flanges |23 thereof, and arcu member 2| (Fig. 4), spaced angles 86 provide a " ate metal rim or tire |24 welded around the pe support for operator’s platform 81 (Figs._ 1 and ' ripheries of drum'members |22'. Hub |2I is re- cessed to receive bearings |26 which also engage From the foregoing description, it is seen .that bearing portions |21 of stub shaft |I6;"wheel 30 30 the frame consists essentially of forwardly con I I8 being secured‘on shaft I I6 by nut |28 threaded ' _ the operator’s station. 2). ' At the rear end of side _ _ ' ' verging, centrally arched tubular side _members on the end of shaft |I6. To seal the wheel and . which have spaced connectionsat their rear ends - the ~bearings therefor against the entry of dele to the rear axle, and have their front ends 'joined terious matter, collar |3| is, secured to hub -|2.|_ around shaft | I6 by suitable cap screws; and seal 35 |32 is seated in collar |3| and engages` shaft H6. At the outer end, hub |2| has' cover |33 secured 35 and supported by> means, later described, on the front axle. Varìous‘auxìliary frameworks are provided on the V-shaped main' frame to sup port -the- plow, carrier, power unit, and other means, as described hereinafter.~ 40 _ ' ` \ thereto by suitable'cap screws. tire, is provided which is journaled by suitable bearingson ,a stub shaft removably secured to Front supports l axle |0I. The front supports for the main frame include ‘a front axle having wheels mounted thereon, and a draft connection secured thereto. Means are 45 provided for supporting the main frame univer sally at the center ofthe front axle. Thus, a drum - type wheel having imperforate sides and a crown ' r The crown tire- promotes easy draft and is self-cleaned; while the imperforate drum' construction prevents mud or other soft material collecting and caklng on the inside of the tire as ' has heretofore occurred with> respect ,to spoke Axle |0| (Figs. 1, 6, and 7) is of tubular con'-- . wheels previously employed.. As a. result, the com- . bination of the drum type wheel and crown rim ' struction, being formed by welding a pair of an gles together. At itsends; axle |0| is adapted to provides for improved operation of the machine. 50 »receive stub shafts upon which drum type wheels ` `The frame is universally 4supported on _the front _ 50 wheel and axle assembiyby means nf a kingbolt with crownfrims are journaled by means of sult able bearings. At~ its right end (to the left. in pivotally connected with the frame about _a ver -Fig. 6), axle I0| has spaced, apertured blocks tical axis, arid pivotally connected with the axle about a longitudinal, horizontal axis. -Bolster |03, |04 (Figs. 6 and 7) secured therein by weld ~ 55^ing at |05. Stub shaft |06 extends through block 21 (Figi 1) has vertically spaced apertured bosses , |03 to within axlev |0_|, and is secured to the 'axle |34,- |36 in which kingbolt |36 is journaled. King-> ,_ by bolt |01 extending through axle |0| and bolt |36 hasforked lower end |31 engaging boss ` through »transverse (aperture- in block |04. At, |35,~ and nut~ |38 engaging boss |34 toprevent ‘ the end of axle |0|, shaft |06 is-securely clamped ._ 60 in position; for this purpose,.axle |0| Vand block |03 are slotted at |08 (Fig. 7) and are transversely endwise displacement; Forkêd end |31 embraces axle IOI (Figs.y 1 and 6), and has apertured por tions |39 in longitudinalV alignment with aper 60 apertured torecelve clamping bolt |09. "Thus, tured portion V|40 of axle.|0|. Bolt -|4| extends shaft I|06 is detachably mounted in axle |0|;, be-f through apertured portions |39, |40, and is jour ing securely fastened thereto at spaced pointaî naled in sleeve |42 in said apertured portion |40. Passage |43 is provided in bolt |4I for the intro duction of lubricant through a suitable fitting. ~ At left end of axle» I0| (tothe right in‘Fig. 6) ' _ From the foregoing description, it isfseen that stub shaft ||6 extends within axle |0I, through the frame is mounted for _movement about the - spaced blocks |03'A, |04A, similar to blocks |03, verticalaxis of kingbolt( |36 which is connected 70 I04_described'above. Shaft | I6 has a plurality to the front axle for -relative pivotal movement of transverse apertures I I1 selectively adapted for ‘about a, hòrizontaLlongitudinal axis. VThus, the engagement bybolt |01A when 'aligned Iwith the ' front wheel and axle assemblyv can oscillaïte uni 65 The mounting of- wheel I-|_I on shaft |06 -is de ` scribed hereinafter'. ’ ' _ aperture through/axle I0=| and block |04A. Ap ertures ||1 provide for adjustment of shaft _H6 75 and crown wheel ||0 mounted thereon, to posi versally'in vertical ‘and Phorizontal 'planes with respect to the main frame. Either wheel can move a considerable distance above the level of A75 i 4 2,109,794 the other wheel, and the wheel and axle assembly tracted position to accommodate the length of can be rotated over 90 degrees> from its trans the carrier shown in Fig. 2. Fig. 3 illustrates schematically an extended position of wheel |16 when the carrier has been lengthened by means verse position; the arched main frame providing clearance for a front wheel during such move ment. As a result, sharp turning of the machine can be effected on any type of ground. A draft connection is provided from the front of carrier extension |89. ‘ ' ~ Carrier The carrier is generally of conventional con wheel and axle assembly of the grader to thel draft vehicle. Draft pole |5| (Fig. 1 and 6) has struction, and only the improved Aconstruction 10 spaced brackets |52, |53 welded'thereon. Extend ing through bracket |53 and welded thereto is transverse ‘pipe member |54 which has brackets |56 welded on its ends. Diagonal bracing mem bers |51 (Fig. 6) ~are welded at their rear ends inbrackets |56 and converge forwardly and are welded in bracket |52. To provide for. vertical oscillation of the draft pole, a series of trans versely aligned pivotal connections are provided between draft pole |5|, and front axle |0|. 20 Brackets |53, |56 have spaced apertured ears |58 which are pivoted by means of cutter-held pins |59 in pairs of spaced ears |'6I on axle |0I. ~ thereof will be described in detail. 10 The carrier comprises upper section 20| (Fig. 10) and lower section 202 of generally similar construction which are pivotally joined at 203. Carrier 20 | (Figs. 10 and 11) comprises spaced side frame members 206, 201 which are connected 15 by a plurality of transversely and diagonally dis posed braces 208. A plurality of rollers 209 (Fig. 10) are suitably journaled in frame members 206, -201 tosupport endless carrier belt 2| |. To con fine material within the width of the belt, _side 20 boards 2|2 are supported from side frame' mem bers 206, 201 by a plurality of angle brackets 2|3. At the front end, draft pole |6| has draft bolt Lower section 202 of the carrier is similarly |62 pivotally and resiliently mounted Vtherein in constructed. The connection between the carrier sections is 25 25 any suitable manner, and draft link |63 is piv - adjustable to provide for proper alignment there otally mounted in draft bolt |62 by pin |64. of. Side members 206 (Fig. 11) of upper section Rear supports 20| has strap 2|6 secured thereto, having an The rear supports comprise rear axle 24 (Fig. apertured end positioned between frame member 206A and bracket 2| 1 'secured to member 206A. 30 8) of tubular construction which is secured by brackets 23 to respective side members 2|, 22 as Pin 203 provides a pivotal connection between above described, and also stub axles on which strap 2| 6, and bracket 2| 1 and frame member rear wheels are mounted; the rear wheels being 206A. Frame member 201A is similarly equipped -similar in construction to front wheels |||, ||8 with a bracket 2|1, and is apertured to receive. heretofore described. At the left end of axle 24, pin 203A> which extends through the apertured stub shaft |1| is secured by welding and has left end of plate 22| slidably mounted by brackets rear wheel |12 journaled thereon similarly to '222, 223 on side frame member 201. At its end, the mounting of each of the front wheels on the plate 22| has threaded extension 224 engaged by ^ - front axle. Left rear wheel`|12 is provided with adjusting screw -226 rotatably mounted in bracket 221 on side frame member 201. By rotating ad 40 40 plug |13 which can be removed to place a suit able material, such as oil or water, within the justing screw 226, plate 22| is moved alongside wheel when additional weight is necessary to counter-balance the carrier. ' . . The right rear wheel is extensible to a plurality 45 of positions to compensate for different carrier frame member `201 to adjust pin 203A in axial alignment with pin 203. It is seen, therefore, that an adjustment is provided between the car rier sections to insure proper alignment thereof. lengths, so that the weight which is carried by - The carrier is supported in a conventional manner from the frame of the grader by upper, the respective rear wheels is distributed to ob tain uniform groundpressure. Right rear wheel - lower and center carrier lifts, which will be gen ~ |16 (Fig. 8) is journaled, in the manner described erally described. 'I‘he upper carrier lift comprises a pair of chains 50 50 with respect to the other wheels, on the outer 23| (Figs. 1 and 2) having one pair of their ends end of shaft |11 which is slidably mounted with in axle 24. To secure shaft |11 and wheel |16. secured to respective posts 48, 46A. Chains 23| in a selected adjusted position, shaft |11 has a ` extend around suitable pulleys 232 (Fig. 2) con plurality of spaced» apertures |18 which are ` nected by >link 233 to opposite sides of upper sec 55 adapted to be aligned with opposite apertures in tion 20|, and are also secured to shaft 234 (Fig. 1) 55 suitably journaled on inclined angles 4.9.v 49A.l axle 24 to receive fastening bolt |19. An ex tended position of right rear wheel |16 with bolt 'Shaft 2341s rotated to wind or unwind chains .|13 engaging left-most aperture |18.;is illustrated 23| to raise- or lowerl the upper carrier by means in phantom lines in Fig. 8. ~ Means are provided for'preventing >rotation of shaft |11 to maintain apertures , |18 in align ment with the corresponding aperture in axle 24. To accomplish this purpose, shaft |11 (Fig. 9) has longitudinal groove |8| receiving key |62 on guide member |83 disposed in recess |84 formed in axle 24 and right-hand bracket 23. 'I'he upper face of guide member |83 is arcuate to engage shaft |11, and` the flat bottom face’ thereof is engaged by adjusting screw |86 thread 70 ed in bracket 23 and having lock nut |81 provided thereon. , ' v v Thus', the right rear wheel of the grader can ' be extended to provide proper weight distribution - including gearing in housing 236 at the rear end of shaft 234. The gearing in housing 236 (Fig. 2)A 604 is rotated by means including telescopic shaft 231 and reversible clutch mechanism in gear box 238 described more specifically hereinafter. The center carrier lift includes a pair of chains 24| (Figs. 1, 2, and 10) connected at their lower 65 ends to respective pins 203, 203A, and having their upper' ends connected to shaft 242 (Fig.v 5) suit ably journaled at its ends on bracketsf243 (Figs. 4 and 5.) secured to posts 46,'46A. l’Shaft 242 is rotated from gear box 238, by gearing in housing 70 244 (Fig. 2)' and shaft 245. _ 'The lower carrier lift includes a pair of chains 25| (Figs. 1 and 2) secured at their lower ‘ends tothe opposite sides of the lc wer end of carrier when_the carrier length'is extended. As illus trated in Figs. 2 and 8, wheel |16~is in its re#l _' .section 202. Chains-26| extend upwardly and 75 2,109,794 over suitable pulleys on shaft -252 (Fig, 5) jour naled at itsiends in respective channels 43, 43A, A draft connection is provided from the plow and to a plurality of positions on the frame of the machine. As seen in Figs. 10 and 11, oppo site struts 26| are provided, having their- outer 291 (Fig. 5) . ' A similar adjustable connection is beam to the iront axle. For this4 purpose, trans and are connected to shaft 253 journaled at its verse member 29| is suitably connected to beam ends on angles 41, 41A. Shaft» 253 is rotated 214 and has draft chain ~connection 292 with from gear box 238, by gearing in housing 254 draft pin 293, mounted in bracket 294 beneath axle |0| and suitably connected thereto by pin and by shaft 256 (Figs. 2 and 5). » Adjustable means are provided for maintaining 296. -To prevent undue movement of the plow the carrier properly positioned transversely with - beam 214 forwardly, chain 298 (Fig. 1) is con ' respect to the frame of the machine; and for nected thereto and to side member 2|. 'I‘he rear end?of plow beam 214 is adjustably 10 this purpose, struts are provided which are ad justable to a plurality of positions on the carrier connected to the frame by transverse member ends pivotally connected by pins 262 to opposite angles 263 on. respective frame members 206, 201.’ Each angle 263 has a plurality of apertures 264 to receive pins 262. At their inner ends, struts 26| are adapted for connection in between small angles 268 and respective posts 46, 46A, by pins 266 adapted to pass through selected of a plu rality of vertically spaced apertures 261 formed in angles 268 and posts 46, 46A. By adjusting the ends of the struts vertically) 25 on the frame and longitudinally of the carrier, the transverse position of the carrier with respect to the frame can be adjusted, so that the lower provided from the front end of beam 214 to the frame. Thus the plow can be adjusted laterally with respect tothe frame. As stated above, the 15 lateral adjustment of the carrier provides for proper positioning thereofI with respect to the plow in any position thereof` and/or with any size plow. ` - Power unit 20 The‘power unit comprises an engine and trans- I mission mechanism for transmitting a drive from' the engine to the endless carrier belt, an'd alsol to the power-control mechanism for adjusting the carrier and the plow. The engine is mounted 5 at the rear of the grader immediately over the_\\ -rear axle adjacent the rear wheel which is oppo-l . end of the carrier can be bodily shifted in proper siteto rear wheel past which the carrier extends. This location of the engine not only aids in se The carrier is held against longitudinal move . curing proper weight distribution by serving to 30 relation to the plow. _ _ ment, by opposite guide angles 269 (Figs. 10 and counter-balance-the weight of the carrier, but 11) secured to respective side frame members 206A, 201A and engageable with plates 5|,V 51A. At the lower end thereof, the carrier has chain also aids in obtaining a relatively low center of gravity, so that the machine can operate with 218 connected thereto and to draft pin 293. -, work and the like. In addition, placing the en gine at the rear of the carrier facilitates‘and Plow Plow 21| (Fig. 1) is adjustably supported fromv Àthe frame of the machine adjacent the ground or pick-up end of the carrier, in position to cast dirt on the endless carrier belt. The speciñc greater safety against overturning in side hill materially simpliñes the provision of the drive _ connections therefrom to the carrier belt and to the‘power control mechanism. . t Engine 3|| (Figs. 1, 2, and 5) is mounted at 40 its rear end on cross member 11 by bracket 3|2, construction of the plow -and its connectionsto and atits front end on cross member 18 (Fig. the frame of the machine will not-be described vin detail, inasmuch as such description is un necessary for an understanding of the invention. Plow 21| (Fig. 1) is supported by bracket 212 5)4 by bolts 3 | 3 extending through integral flanges of transmission housing 3|4. Housing 3|4 (Figs. 5 and 12) is secured by a plurality of bolts 3|5 and vertical bar 213 on Aplow beam 214. mission housing 3|4 (Figs. 1 and 5), fuel tank 3|1Í is suitably mounted on the front of engine 3| I; the front of the engine being considered that end which is foremost relative to the front of 50 the machine frame. Thus, the power unit is Plow to crankcase 8|6 of the engine. Above trans beam 214 is supported by chains 216 connected thereto at their lower ends, and connected at their upper ends to respective drums 218, 219 on shaft 28|. Shaft 29| is supported -at its 'front end by bracket 282 on post 38 and at its rear end mounted at the rear end of the grader, and the by housing 283 (Fig. 5)v on post 4|. Drum 219 drive connections from the power unit are located (Fig. 1) is loose on shaft 28| and is engaged nor 55 mally by slidable clutch element 284 slidably and .« non-rotatably mounted on shaft 28|. Spring at the front end thereof. ‘ -Two drives are provided from the power unit, 55 one of the drives being a clutch controlled drive pressed lever 286 controls movement of clutch element 284. Thus, the rear end of the plow for the endless carrier belt, and the other of the drives being a constantly running drive for the beam can be adjusted simultaneously or inde power control mechanism. pendently of -the front end of the plow beam lto control the suction of the plow, i. e., its angle with respect to the ground. Integral with drum having its end flange secured by screws 322 to The engine (Fig.. 12) includes crankshaft 32| 60 flywheel >323. Flywheel 323 has clutch cover 219 is brake drum 288 having brake band 289 ' 324 secured thereto by a plurality-of suitable associated therewith and controlled from foot cap screws. Cover 324, together with flywheel 65 pedal 290 (Figs. 1 and`2). Thus, when drum 219 is disconnected from shaft 28|, the rear end of the plow can be maintained in its adjusted position by operating foot pedal 290. Within clutch plate 321 and flywheel 323, is driven clutch l housing 283 suitable worm and worm wheel gear plate 328 pressed on hub 329 which is splined o'n ing is provided for driving shaft 28|, the gearing being driven through shaft 29| from gear box tubular shaft or sleeve 33|. Plate 328 has clutch 7,0 pending applicatipn, Serial N0. 716,324, med faces of suitable material thereon adapted to be engaged by the opposed faces of the flywheel'323 and plate 321 to transmit a drive- to the plate 328 andito shaft 33|. Shiftable clutch plate 321 March 19, 1934.*1 “ is normally urged to clutch disengaging position 75 238. For a more detailed description of the plow frame construction, reference is made to my co 75 323, forms part of a clutch, and has internal 65 teeth »325 slidably engaged by teeth' 326 on shift able driving 'clutch plate 321. Between driving - 6 2,109,794 by a plurality of springs 332 surrounding studs 333, threaded in plate 321 and extending through drum of the carrier; the drive extending sub apertures in clutch cover 324. Only one spring 332 and associated stud 333 are shown. stantially in` a, straight line parallel to and at th'e rear side of the carrier. It is to be noted that the drive consists entirely of shafts and sealed To `accomplish shifting movement of plate 321 housings so that no interruption can be caused (Fig. l2) to engage the clutch, spider 336 is ad through obstructions by dirt, mud and the like. justably threaded within apertured boss 331 of The above described drive also includes means for preventing reverse movement of the carrier cover 324, and has a plurality of cam levers 338 of the lever being pivotally connected to link 340, also plvotally connected to shiftable collar 341. By shifting movement of collar 34|, levers belt so that, when the belt is stopped, the load thereon will not be deposited'around thev plow by such reverse movement ofthe carrier belt. To accomplish this purpose, an irreversible means in the form of an automatic locking brake is 338 are oscillated to urge plate 321 to clutch en associated with a clutch driven shaft within a mounted thereon. One end of each lever 338 10 is plvoted at 339 on spider 336; the other end 15 gaging position. Adjustment of levers 338 with housing of the power unit. ' 15 Within bearing cage 369 (Figs. 12 and 14) cam respect to plate 321 is accomplished` by rotating 'spider 336 within boss 331. Spring-pressed ' 40| is secured by key 402 (Fig. 14) on shaft 364, plunger 342 in spider 336 is provided for this between respective spacers >403- (Fig. 12), nut 406> purpose;'the end of plunger 342 being adapted to on shaft 364, and bearing 361. Cam '40| is pro 20 engage in any one of a plurality of radially dis vided with a plurality of offset cam surfaces 406, 20 forming equally spaced pockets 401 between cam posed recesses 343 in plate 321. Shifting move ment of collar 34| is controlled by forked mem ber 346 (Fig. 12) _which is connected by suitable shafts and linkage to hand lever 341 (Figs. 1 and 25 5) positioned at the left of the operator’s station. From the foregoing description, _it is seen that a selective clutch controlled drive is provided be tween crankshaft 32| and tubular clutch driven Braking elements are-disposed Within pockets 401, which are adapted to lock cam 40| and shaft 364 automatically against movement in one di rection, while permitting rotation thereof in the From clutch driven shaft 33 l, a drive is trans mitted by shafting and enclosed gearing to drive the endless conveyor. Shaft 33â is supported adjacent crankshaft 32| by bearing 35E in fly opposite direction. A roller 400 (Fig. 14) is pro vided in each pocket 401; and said rollers are 30 of a diameter to permit rotation of -carri 40| and shaft 364 when disposed in the deepest portion of pockets 401 during counter-clockwise rotation wheel 323; retaining collar 352 being provided thereof, as indicated by the arrow. Upon clock- l Shaft 33| (Fig. 12) . 30 40| and retainer 369. It is to be noted that pockets 401 are deeper at one end than at the other. l 35 therefor. Seal 353 seated in collar 352 engages shaft 33E. At its outer end, shaft 33| is sup ported in bearing 354 in bearing retainer 356 wise rotation of cam 40|, rollers 40B become wedged between cam surfaces 406 and bearing cage 369 to lock cam 40| and shaft 364 'against and collar 351, which are secured together and rotation. to auxiliary housing 356 by screws 359. Seal 3_6| 4.0 is seated in collar 351 and engages shaft 33|'. ' Resilient means are provided. for urging roll ers 408 to locking position whenever counter 40 Within auxiliary housing 358 shaft 33| has in clockwise rotation of cam 40| ceases. Plungers tegral beveled pinion 362 which meshes with 409 (Fig. 14) are disposed in recesses formed in beveled gear 363 on shaft 364. Shaft 364 is jour--l substantially radial walls 4|| of pockets 401, and naled in spaced bearings 366, 361, in cover 368 are recessed to receive springs 4|2 which urge 45 and bearing cage 369, respectively. Lubricant plungers 409 outwardly against rollers 408. Dur can be introduced into housing 358 by removing ing counter-clockwise rotation of shaft 364 and filler plug 365 (Fig. 13). -‘ cam 40|, that is, when .the carrier belt is being From housing 358, a substantially linear drive driven to elevate material, rollers 408 are forced connection extends outwardly along the carrier against plungers 409-, pushing them inwardly 50 to the driving drum for the endless conveyor. against the pressure of springs 4|2. If counter Shaft 364 (Fig. 12) extends without cover 368, ’ clockwiserotation of cam 40| ceases, or if clock through seal 31| seated in cover 368, and has wise rotation _thereof starts, plungers 409 urge coupling member- 312 secured on the tapered rollers 408 into locking position, thus effectively ` end thereof by nut 313. Coupling member 312 preventing backward movement of the carrier belt and the driving train therefor. 55 has internal teeth meshing at 314 with comple mentary teeth on- coupling member 316 secured To lubricate the' brake means, trough 4 I3 (Fig. on the tapered end of shaft 311 by nut 318. 13) is suitably mounted in housing 358 to re Collar 319, seated on a reduced portion of cou ceive a part of the introduced lubricant, which pling member 316, is secured by suitable cap part is conveyed by trough 4|3 to passage 4|4 in ‘ cover 368 which extends beyond bearing 366.` 60 screws to coupling member 312 to maintain «the connection therebetween. To prevent the entry Passage 4| 6 (Figs. 12 and 13) is formed in cover of-any deleterious matter within the connection 368 above the bottom, to return excess lubricant between shafts 3,64, 311, bellows 38| is .secured to housing 358. by spring clips 382 to coupling member 316 and collar 319. ' ` ' Shaft 311v (Fig. 5) is suitably journaled by bracket 386 on post 46 and has universal con nection 301 (Figs. 2- and 5) with telescopic shaft 386.' Shaft 388 (Fig. 2) has universal connection '389 with telescopic shaft 39|, suitably mounted 0n upper section 20| and connected by coupling v392 to gearing in housing 393 to drive the drum at the outer lend of the carrier. It is seen, therefore, that a simple and direct 7a drive is provided from the engine to the driving The constantly running drive for the power control mechanism’will now be described. To provide a drive for the power control4 mecha- , nism, which is completely independent` of the clutch control `drive and the carrier belt, av drive shaft is provided connected to the crankshaft. This drive shaft extends through. the hollow 70 clutch driven shaft 33| _and has a driving con nection to the power control mechanism. Drive shaft 42|A (Fig.- 12) has integral gear 422 at its rear end meshing with »a suitable internal gear formed in flywheel 323,- to provide a 'constant 715> 2,109,794 _ pedal 416. îli’ootl pedal 416 is pivoted at 411 on drive connection therefor from the . engine. Shaft 42| extends through tubular shaft 33|, and outer splined end 423 thereof `is engaged with internal splines in worm 424, supported in respective bearings 425, 426 in bosses 421, 428 of auxiliary housing 358. Worm 424 (Figs. 12 post 4I, and is connected by rod 418 to lever 419 .v pivoted at 48| on angle ‘1|'and having clapper end 482 for striking gong. 483 to signal the oper ator of the draft vehicle. " Lever 419 vis spring-held in the position illustrated. To the right of op-- and 13) is engaged with worm wheel 43| Von ver erator’s seat 41| (Fig. 2), engine throttle control tical shaft 432, journaled by suitable bushings in lever 485 is provided. . boss 433 of auxiliary housing 358- and in boss 434 10 of cover 436 secured to said housing.` Shaft 432 extends through cover 436; and the entry of deleterious matter past such shaft is prevented by seal 431, seated in cover _436 and engaging shaft 432. Shaft 432 (Fig. 5) has universal con - \ l From the foregoing description, it is seen that all the controls for operating adjustments of the 10 grader are grouped conveniently around the op erator’s seat, and can be manipulated by an op erator in the seat. The arrangement contributes to efiicient operation, as the operator can con ‘_ serve his energy and maintain a close watch on 15 nection 44| with shaft 442 extendingupwardly the operation of the carrier and the plow, making within gear box 238 of the powercontrol mecha all adjustments quickly and easily without exer nism. Thus a direct, constantly running drive is> tion. provided from the front end of the engine to the ` 1,5 y ` ` Modified construction Figs. 16 through 18 illustrate an elevating grad 20 sisting of shafts and gearing completely housed. y er which is generally similar to that illustrated in The power control mechanism will now4 be de Figs. 1 through 15, and which will be described 20 power control mechanism, the entire drive _con scribed generally in connection with the adjust only insofar as it differs from such modiñcation.A . ments of the carrier and the plow. Fig. v15 indi- . This type of grader does not have the power plant . 25 cates schematically the drive from the power unit - thereon, and can be employed in combination through the carrier belt and through .the power . with a power take-off on the draft vehicle. Cer control mechanism, similar parts being numbered similarly. As described above, shaft 442 extends tain details in frame construction and mounting within housing 238 and has bevel gear 446 se The grader is provided with a frame construc cured thereon, meshing with opposite bevel gears 441 journaled on shaft 448. Integral with re spective bevel'gears 441 are opposite spur gears 449 forming a part of opposite trains of inter meshing spur gears rotatably mounted about a 35 plurality of shafts 448. Each shaft 4‘48 has cen tral splined portion 45| slidably and non-rotat ably engaged by double faced clutch element 452 adapted for engagement with clutch elements 453 on associated spurV gears 449, to transmit a drive 40 to associated shafts 448 in either direction by.virtue of the intermeshing of spur gears 449. Each clutch element 452 is controlled by a fork 454 and rod 456 from hand control lever 451. From each of shafts 448 (Fig. 15), a drive ex 45 tends without housing 238 to respective shafts also obtain. , . - tion, consisting of tubular members, which is 3o supported to provide flexibility in maneuvering and to obtain uniform weight distribution. The endless conveyor and the power control mecha nism are driven by a power take-off from the draft vehicle, which is not shown. . 35 . The frame (Figs. 16 and 1'1) includes arched . tubular side frame members 50|, 502 which are fabricated by welding together at 504 the flanges of opposite angles 503 (Fig. 17). At their front ends, side frame members 50|, 502 are joined by 4,0 plate 506 and bolster 501 secured to the respec tive top and bottom faces of .side members 50|, 502. The frame is otherwise similar to the con struction illustrated in Figs. 1 through 15.v A universal supporting connection is provided 45 231, 245,'256, controlling adjustment of the car from the frame to thefront- wheel- and axle as rier, and to shaft 29| having a driving connection fsembly, to allow oscillation of the assembly with with shaft 28| and controlling adjustment of the respect to the frame in_vertical and horizontal plow. 4It is to be noted that the drive foreach planes. Bolster 501 has vertically apertured boss adjustment is transmitted to a 'self-locking worm 508, in which kingbolt 5| I is secured. At its low 50 and worm wheel _gearing enclosed in the respec-v er end, kingbolt 5|| has ball portion 5|2 seated> tive housings referred-to in the preceding descrip in semi-spherical socket 5|3 formed iíi casting or socket member 5|4. Casting 5|4 is mounted in tion. - ‘ ' Operator’s station The arrangement of the operator’s station as disclosed herein provides an operator’s seat with any suitable manner at the center of axleq5|5 which-is generally similar to axle |0| described> 55 above. Collar 5 | 6 isl secured by suitable fastening bolts to casting 5|4 around ball portion 5|2,- and respect to which the controls for all operating ad- , the inner surface thereof forms a continuation justments are conveniently grouped. The group of socket 5|3; Thus, a universal connection‘is ing is such that all operating adjustments can be provided for supporting the frame on the front 60 made ‘by an operator sitting in the operator’s wheeland axleÍ assembly at the center thereof to seat. In addition, a clear view of the plow and - provide a wide range of oscillation for the assem- the carrier is provided as well as to the operator bly with respect to the frame in both horizontal „ of the 'draft vehicle for signalling. _ and. vertical planes, and to distribute the weight 65 Operator’s seat 41| (Figs. 1, 2, and 5) is mount ed by bracket 412 on side frame member 2| to the l rear of platform 81in longitudinal alignment with the plow and the pick-up end of the- carrier. As noted above, clutch control lever 341 is posi tioned immediately to the left of seat 41|, and hand control levers 451 and gear box 238 are ’ mounted immediately to the right and forwardly of seat 41|, by bracket 413 (Figs. 2 and 5). Plow control lever 286 is positioned in front of the op 75 erator’s seat, as 'are brake pedal 290 and foot equally between the two front wheels. 'I'his type 65 of universal connection can also be employed in,y place of the first. modiflcation‘described. The rear wheel and axle assembly is substan tially -identical in construction withv that illus trated in’Fig. 8, differing therefrom only by in 70 corporation of counter-balancing lweight means «which serves the same function .with respect to thev outwardly extending end of the carrier as the power unit in the ñrst modification. -Left ` rear wheel 52| (Fig. 16) Vis similar in construction 75, ' " 8 2,109,794 to left rear wheel |12 (Fig. Sil-and has intro duced through plug |13 (Fig. 16) a’mass of a suitable heavy material such as concrete, indi cated at 522. By filling the wheel with concrete or the like, the weight of the Wheel acting ad jacent the left end of the axle serves to counter balance the weight of the extending end of the carrier. . For driving the conveyor and the power control mechanism, power take-od shaft 526 (Fig. 16) extends rearwardly from a draft vehicle, not shown, and has universal connection _521 with shaft 528 journaled in bracket 529 and housing 53| on the frame. At its rear end, within hous ing 53E, shaft 528 (Fig. 18) has bevel gear con nection 532 with shaft 533 which 4is suitably journaled in housing 53€. ` From shaft 533, a constantly running drive is transmitted to the power control mechanisms and 20 a clutch controlled drive is transmitted to the endless conveyor. At its left end, shaft 533 has bevel gear connection 534 with vertical shaft 53@ (Figs. 16 and 18) which extends upwardly out of housing 53| to gear box 236 (Fig. 1) of the power control mechanism, similarly to shaft 442 (Fig. 4). At its right end, shaft 533 (Fig. 18) has clutch element 53?, shiftably and non-ro tatably mounted thereon and adapted for engage ment with complementary clutch element 535 30 integral with shaft 539. Shifting movement of clutch element 531 is accomplished by means in cluding fork 54i, engaging an annular groove therein and mounted on shiftable rod 542. Rod` 542 (Fig. 16)- extends without housing 53( and 35 is connected by link 543 to hand control lever 54d mounted for oscillatory movement on the frame adjacent the operator’s seat. Movement of lever 546, therefore, controls the transmission of a drive to shaft 539 which extends to the right 40 from housing 53| , being journaled in housing 546 on the frame and having universal connec tion 381 with shaft 388. As previously described, shaft 388 is connected to the driving means for the endless conveyor belt. ‘ trol means for adjusting said adjustable means; a power unit on said frame including an engine at the rear of said carrier, and power transmitting means at the front end of said en gine and at the rear of said carrier; a substan 10 tially linear -drive connection from said power transmitting means to~ said conveyor and extend ing along the rear side of said carrier; and a ' substantially 'linear drive connection from said power transmitting means to said power control means; said drive connections consisting essen tially of shafting and housed gearing. ' 3. In an elevating grader; a frame; a carrier including an endless conveyor; adjustable means mounting said carrier on said frame; power con trol means for adjusting >said adjustable means; power transmitting means at the rear of said carrier; said power transmitting means including a housing, a plurality of driving shafts extending from within to withoutsaid housing, and means Within said housing connecting said shafts to a source of power; and shaft connections without said housing from said shafts to said conveyor and to said power control means. 4. In an elevating grader; a frame; a carrier 30 including an endless conveyor; adjustable means mounting said carrier on said frame; a power unit on said framefincluding an engine at the rear of said carrier, and power transmitting means at the'front end of said engine and at 35 i 1e rear of said carrier; said‘power transmitting means including a housing secured to said engine, » a driving shaft extending from within to with out said housing, and means within said _housing connecting said shaft to said engine; `means With 40 -out said housing connecting said shaft to said conveyor; and means within said housing asso ciated with said shaft for preventing reverse movement of said conveyor. , Therefore, I claim as my invention: l._ In an elevating grader; a frame; a carrier including an endless conveyor; adjustable means mounting said carrier on said frame; power con 5. An elevating grader constructed to provide ease of maneuvering and substantially uniform ground pressure on all the ground supports there for, comprising a frame, a carrier for plowed material extending transversely of the frame and projecting beyond one side of the frame, an en 50 gine for driving said carrier _located at the rear of said carrier and at the side of said frame opposite to said projecting carrier side, a power control .unit for adjusting said carrier and located trol`means for adjusting said adjustable means; above the crank shaft of said engine, a sub It is seen, therefore, that .the modified con» struction described above is generally similar to that shown in Figs. 1 through 15, and obtains substantially the same advantages as to weight distribution and ease in maneuvering and in v connection from said power transmitting means to said power control means. 2. In an elevating grader; a frame; a carrier including an endless conveyor; adjustable means mounting said carrier on said frame; power con operation. a power unit -on said frame; including an engine at the rear of said carrier, and power transmitting means at the front end of said engine and at the rear of said carrier; a substantially linear drive connection from said power transmitting means to said conveyor; and a substantially linear drive stantially linear drive extending upwardly from the front end of said engine to said power con trol unit,-and a substantially linear drive from said front end of said engine to saidcarrier, and extending substantially parallel to said carrier. 60 CARL A. GUSTAFSON.