US2568627A - Earth carrying scraper - Google Patents

Description

A.R.HENRY EARTH CARRYING SCRAPER Sept. 18, 1951 4 Sheets-Sheet 1 Filed Jan. 7, 1948 my m m r 6 M Sept. 18, 1951 A. R. HENRY EARTH CARRYING SCRAPER Filed Jan. 7, 1948 4 Sheets-Sheet 2 7 w N mi m 2 m Us 0 w ii \x m L n V. B

P 1951 A. R. HENRY 2,568,627

EARTH CARRYING SCRAPER Filed Jan. 7, 1948 4 Sheets-Sheet 5 INVHVTOR,

Sept. 18, 1951 A. R. HENRY 2,568,627

EARTH CARRYING SCRAPER Filed Jan. 7, 1948 4 Sheets-Sheet 4 IINVENTOR,

I f/h/f 75? 25 1019, "/M

Patented Sept. 18, 1951 UN ITED" STATES PATENT AIbertR-Henry Salina, Kans., assignoi toflenry. Manufacturing. Co, Inc;, Topeka, Kansi, alcor poration of "Kansas Application J anuary 7, 1948; SrialNor952 Thisiinventiontrelates tosnew-and useful improvements in scrapers, and has particular ref= erence to ascraperadapted to. bevtowed bya tractor-or the likeand to. scrape up a loadof earth, carry theload to. any desired point, and ther -dump it.

A principal object of the'p-resent invention is the :provision of a scraper comprising a yoke type draftimeans adaptedxto :be-towed by'a tractor or the-like; each of the armsof said yoke beingpivotally connected at its rearward end to one corner of .a vertically 'disposedatriangular support plate, afground engagingwheel carried for rotation at a second corner of:.each'of said support plates; a bowl open at top and bottom carried pivotally between said support plates and supported therebyon: an axis atthe third corners thereof, a scraper pan carried for swinging movement within said bowl on-said-bowlaxisand pivotally connected to said supportplates at saiddraft axis, andcpoweredmea'ns for-movingsaid bowl longitudinally relative to said draft. yoke, whereby said scraper pan mayj-be tilted forwardly to lower its. forward edge to a scraping position tilted rearwardly to a carrying positionsubstantially enclosed within saidbowl,and tilted still farther rearwardly to' lower. thewrearward edge of: the scraping pan beneath said bowl, thereby dump.- ing theaload of earth carriedby said pan.

Another'object is i the provision, in a scrapers of thevclass described having a bowl: pivotally; swung betweenthe arms OfT'a" yokentype draft means; said bowlbeing movable longitudinally and vertically, between saidarms, of. rollers carriedzfor rotation ontransverse axes by said. bowl and projecting outwardly to beengaged in channels formed longitudinally in the. arms of said: yoke, whereby; said. bowl: is" maintained substantially upright regardless of the position of the scraper pan;

A furthertobject is the provision, in a scraper of theaclass describ d shaving. abowland scraper pan; carried between" outwardly spaced support.- ingwheels, of a digging: member carriedby said bowl and disposed behind. each of saidiisupporting wheels; said-digging membertbeing adapted. to be loweredinto the earth substantially simultae neously with the cuttingwedgeof the pan,.thereby cuttingfurrows. in which said wheels may rest on th'eznext pass of the scraper, theearthtmoved to form said furrows beingv moved inwardly into the path of said-scraper pan.

Other object's are simplicity and-economy of construction; and;.ease; dependability, and' efiiz ciency of operation.

With. these objectsiinview, as well ascther objects which will appear in. th course of-the specification, reference will behadto. theldrawe ings, wherein:

Figure 1 is a side elevation, partiallybroken away of a scraperuembodying. the present in-* vention, showing the bowl elevated and-scraper panlinthe dumping position.

Fig. 2 is a view of the. parts shown in Fig. 1, with the bowl, and. scraper pan. shown in. the earth carrying position.

Fig. 3-is a view of the. parts shown inFigr. 1, withthe scraper pansand auxiliary discs shown lowered to the digging position;

Fig. .4 isa plan view of. the scraper in the-carrying position.

Fig. 5 is an enlarged. fragmentary vertical section taken on lineV-V oi-Fig. 4.

Fig; 6'-is an enlarged'frag-mentaryvertical.sec-1 tion taken on linewVIe-VI of Fig-. 5;-

Fig; 7 is an enlargedfragmentary section taken on line V-IIT-VIIof Fig. 6

Fig. 8 is; an enlarged fragmentarysection taken on line VIII-.-.VIII of Fig.5:

Fig.7 9 is an enlarged fragmentary section. taken on line :IXe-IX of Figi: 5;:

Fig. 10 ris .an-J' enlarged. fragmentary section taken on line XX of Fig. 1;.showing ::the sup1- portingstr-ucture'fontonezof the discs;

Fig. 11 is an enlargedrfragmentary section taken on line XI-a-XI offFigi'. 10. J

Like reference numeralgapply tossimilara parts throughout the several :viewspand the numeral .2 applies to a draft yoke=comprisi1ig apairrof [pare allel spaced apartside arms -4' formed of vine wardly opening channel irons, a. cross-bar 6 extending between the-iorward ends ofsaid. side arms, a' pair of spaced apart drawbars. 8 rigidly connected at their rearward ends to cross-:bara 6; a brace lll rigidly fixed to theforward end of each side-arm- Mand extending forwardly: and inwardly to join thexadja'cent drawb'ar:8iintere mediate" its ends; andaa hitch: plate |2 urigidly fixed between the forward end. 1101313101155 of: draw;

disposed planar support plate 22 adjacent one corner thereof, said support plates being substantially triangular in shape. Side arms 4 are disposed adjacent the inner surfaces of said support plates. A ground-engaging wheel 24 is carried for rotation on a stub axle 26 rigidly fixed to and extending outwardly from each of support plates 22 adjacent a second corner thereof, as shown in Figs.'1-4.

A substantially rectangular scraper bowl 28 open at top and bottom and having side walls 38, a curved forward wall 32, and a curved rear wall 34, is pivotally swung between support plates 22 by means of a pair of trunnion bolts 36, each of said trunnion bolts extending through a tubular bushing 38 rigidly attached to support plate 22 and through an outwardly extending tubular bushing 48 rigidly attached to the adjacent side wall 38 of the bowl, as best shown in Fig. 8. Side walls 38 are spaced inwardly from plates 22 sufficiently to swing freely between side arms 4 of yoke 2. Forward wall 32 and rear wall 34 of the bowl are reinforced by transversely extending angle irons 44 welded to the outer surfaces thereof along their lower edges. 7

A scraper pan 42 having side walls 46 and bottom 48 is swung within bowl 28, the side walls 46 of said pan being pivotally supported on trunnion bolts 36 and spaced apart from side walls 38 of the bowl by means of spacer washers 58 carried on said bolts, as shown in Fig. 8. A shaft 52 is carried for rotation in a plurality of bearing tubes 54 welded or otherwise securely fixed to the lower surface of pan bottom 48. Said shaft is disposed transversely to the line of travel of the scraper, and its extended end portions are carried rotatably in tubular bushings 28 fixed to support plates 22. A blade 56 is securely fixed to the forward edge of pan bottom 48 by bolts 58. Said pan bottom is reinforced by a plurality of longitudinally extending gusset plates 68 welded to the lower surface thereof, and the forward edge portions of pan side walls 46 are reinforced by strengthening plates 62 welded thereto. The forward edges of said side walls and said strengthening plates are bevelled outwardly to asharp edge at 64 to permit the pan to be pulled easily through the ground.

Bar members 66 are welded or otherwise rigidly secured to the. outer surfaces of the sidewalls 38 of bowl 28. Said bar members extend convergently inwardly at the forward end of the bowl. A piston rod 68 is pivotally connected at its rearward end between the forwardly extended ends of bars 66, and extends forwardly. At its forward end said piston rod carries a piston I8 slidably carried in a hydraulic cylinder I2 pivotally connected at its forward end to hitch plate I2 by means of pivot pin I4. Fluid under pressure may be introduced into cylinder I2 ahead of piston I8 by means of pipe I6 and flexible hose I8, and behind said pistonby means of pipe 88 and flexible hose 82. Hoses I8 and 82 are interconnected with suitable pumping means not shown mounted on the tractor. Thus the piston may be moved to any position desired within the cylinder.

Referring particularly to Figs. and 9, it .will be seen that a transversely extending shaft 84 is carried in a mounting sleeve 86 welded or otherwise fixed to the outer surface of forward bowl wall 32 adjacent the lower edge thereof at each side of the bowl. Said shafts extend outwardly from each side of the bowl, and a tapered roller 88 is carried for rotation on the extended portion of each shaft. Said rollers project into and are adapted to roll within the channel irons forming side arms 4 of draft yoke 2. As shown in Fig. 9, the legs of said .channel have inner .surfaces tapered to a degree substantially equal to the taper of the roller. v

Referring to Figs. 1, 4, 10 and 11, it will be seen that a digging disc 98 is disposed immediately behind each ground-engaging Wheel 24. As best shown in Figs. 10 and 11, each of said discs is mounted on an aXle 92 carried for rotation in a bearing sleeve 94 rigidly mounted between substantially parallel side bars 96. Said side bars are pivotally connected adjacent their inner ends to bars 98, bars 98 being pivotally connected at their inner ends to ears I88 welded to reinforcing angle 44 fixed to the rearward end of bowl 28 by means of bolts I82, and extend outwardly and rearwardly therefrom. Side bars 96 are pivoted adjacent their inner ends to bars 98 by means of bolts I84.

Referring to Fig. 11, it will'be seen that bars 96 are each provided with a transverse extending ear- I86 provided with a series of spaced apart holes I88 through which bolts II 8 may be selectively inserted to fix bars 96 to bars 98, thereby adjusting the angle of disc axle 92 relative to bars 98 and to the ground. Additional longitudinally spaced holes H2 and H4 are provided in bars 98 in which bolts I84 and H8 may be respectively inserted to adjust disc 98 longitudinally relative to bars 88. A rod I I 6 is pivotally connected at its lower end to an ear I I8 fixed to one of bars 98, and extends upwardly and forwardly through a bracket I28 fixed to bowl 28. A stop collar I22 is fixed to the upwardly extended end of said rod. A coil spring I24 carried on said rod and adapted to be compressed between bracket I28 and a collar I26 fixed to said rod, is adapted to urge bars 98 resiliently downwardly. V

The operation of the scraper is substantially as follows. With the parts having the relative ositions shown in Figs. 2 and 5, fiuid'is delivered under pressure through hose 82 and pipe 88 to cylinder I2 behind piston I8, thus forcing piston rod 68 forwardly. This causes bowl 28 to be moved forwardly, turning about wheel axles 26 as an axis. Since trunnion bolts 36 carrying pan 42, move forwardly, and since pan shaft 52 is fixed relative to draft yoke 2, pan 42 tilts forwardly to bring blade'5B thereof into contact with the ground. Simultaneously bowl 28 is lowered, since it also is suspended from trunnions 36. However, the forward end of bowl 28, being guided relative to side arms 4-by rollers 88, is lowered at a slower rate than trunnion 36 is lowered, thus causing the forward end of the bowl to'be tilted upwardly. This produces a rapid opening between blade 56 and the lower edge of bowl-front wall 32.

The bowl and pan then have the relative posi-. tions shown in Fig. 3, the forward edge of the pan being lowered beneath thelevel of wheels 24 to dig a furrow or trough I28 in the earth. As bowl 28 is lowered, discs 98 are also lowered, and when the blade is fully lowered, the discs are lowered into the earth to cut a furrow in the earth bee hind each wheel 24, and to move the earth re-' moved from said furrow into the trough cut by pan 42. In the usual scraper in which the-wheels are spaced outwardly from the digging members, the Wheels will support the digging members above the bottom of the trough on subsequent passes of the scraper. ,In this scraper, on the other hand, the furrows cut by discs 98 serveas tracks for wheels 24 when the. scraper makes subs.

sequent passes, thus allowing the scraper pan blade to be lowered sufiiciently to make a full cut. Furthermore, since the dirt removed from the furrows cut by discs 90 is moved into the trough cut by the pan, said dirt will be picked up and removed by the pan on its next subsequent pass.

When the scraper has been pulled forwardly with the blade lowered as in Fig. 3 to fill bowl 28 with earth, fluid is introduced under pressure through hose 18 and pipe 16 to cylinder 12 in front of piston 10, thus forcing the piston and piston rod rearwardly with respect todraft yoke 2. This forces support plates 22 to rotate rearwardly about axles 26, thus raising bowl 28 as it is moved rearwardly. Since trunnion 36 is moved rearwardly with respect to pan shaft 52, pan 42 is tilted rearwardly. When the pan has tilted rearwardly sufliciently to be substantially enclosed within bowl 28 as shown in Figs. 2 and 5, the motion of piston 10 may be arrested and the earth transported as far as desired. When it is desired to dump the earth, piston 10 is moved still farther to the rear to tilt pan 42 still farther to the rear as shown in Fig. 1, thus dumping the earth over the rearward edge of pan bottom 48. Discs 90 are of course, elevated above the ground when bowl 28 is raised. Bowl 28 is at all times maintained substantially upright by the engagement of rollers 88 in side arms 4. The cycle may then be repeated as desired.

What I claim is:

1. A scraper comprising a pair of spaced apart parallel support members, an outwardly spaced ground-engaging wheel carried for rotation on a transverse axis by each of said support members at one corner of a vertically disposed triangle, a draft yoke having its straight arms piv otally connected to said support members on a transverse axis at a second corner of said triangle and extending forwardly, a unitary bowl open at top and bottom pivotally supported between said support members on a transverse axis at the third corner of said triangle, a roller carried for rotation by said bowl and adapted to engage a longitudinally formed track formed by the arms of said draft yoke, a scraper pan pivotally carried within said bowl on said bowl axis and pivotally connected to said draft axis, and powered means carried by said yoke for moving said bowl longitudinally relative to said yoke, whereby said scraper pan may be tilted to bring its forward cutting edge into contact with the earth, tilted rearwardly to a carrying position substantially within said bowl, and tilted still farther rearwardly to a dumping position, said bowl being bodily elevated and maintained substantially upright as said pan is tilted rearwardly.

2. A scraper comprising a pair of spaced apart parallel support members, an outwardly spaced ground-engaging wheel carried for rotation on a transverse axis by each of said support members at one corner of a vertically disposed triangle, a draft yoke having its straight arms pivotally connected to said support members on a transverse axis at a second corner of said triangle and extending forwardly therefrom, a unitary bowl open at top and bottom pivotally supported between said support members on a transverse axis at the third corner of said triangle, and disposed between said yoke side arms, a. roller carried for rotation on a transverse axis at each side of said bowl and adapted to project outwardly into guide channels formed longitudinally in the arms of said draft yoke, a scraper pan pivotally carried within said bowl on said bowl axis and pivotally connected to said draft axis, and powered means carried by said yoke for moving said bowl longitudinally relative to said yoke, whereby said scraper pan may be tilted to bring its forward cutting edge into contact with the earth, tilted rearwardly to a carrying position substantially within said bowl, and tilted still farther rearwardly to a dumping position, said bowl being bodily elevated and maintained substantially upright as said pan is tilted rearwardly.

ALBERT R. HENRY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,235,086 Werts July 31, 1917 1,320,285 Smith Oct. 28, 1919 2,010,801 Adams Aug. 13, 1935 2,262,283 Henry et al Nov. 11, 1941 2,344,301 Hand Mar. 14, 1944 2,380,021 Brown et al July 10, 1945

Images