US2152700A - Heavy duty scraper - Google Patents

Description

C. LE BLEU April 4, 1939.

HEAVY DUTY S CRAPER Filed Dec. '7, 1934 6 Sheets-Sheet 1 April 4, 1939.

116 117 fie 2.

57 5a 56 52 39 $9 65 Z 7 43 o 64 6 C. LE BLEU HEAVY DUTY SCRAPER Filed Dec. 7, 1934 '6 Sh eetsShee-t 2 Inventor Midda April 4, 1939. c. LE BLEU HEAVY DUTY SCRAPER Filed Dec. 7, 1934 6 Sheets-Sheet Aprii 4, 1939. 3 LE BLEU 2,152,700

HEAVY DUTY SCRAPER Filed D80. '7, 1934 6 Sheets-Sheet 4 Inventor April 4, 1939. 3 LE BLEU 2,152,700

HEAVY DUTY S CRAPER N S N April 4, 1939. c. LE BLEU HEAVY DUTY SCRAPER Filed Dec. '7, 1934 6 Sheets-Sheet 6 Inventor Patented Apr. 4, 1939 UNITED STATES PATENT OFFICE 22 Claims.

This invention relates generally to earth digging, scraping, leveling and transporting devices, as used in leveling of ground, building roads, excavating, grading, etc., and more particularly to the type known as heavy duty scrapers, by means of which very large amounts of dirt may be removed.

Of the manifold objects of this invention, the principal one is to provide a heavy duty scraper in which a drum-like structure, provided with a plurality of longitudinal earth retaining compartments arranged about its axis, is transversely journaled on the frame of the implement, so that when one compartment is loaded it may be swung upward with its load by rotating the drumlike structure, exposing the next compartment for loading and so on until all of the compartments if desired are load.

This construction enables a very large amount of dirt to be scraped and carried with but a relatively small expenditure of power, since the main factor which limits the size of the ordinary single-scoop scraper for practical purposes is the great frictional resistance oifered to the loading of the dirt when the latter has to pile up on itself and move back by the pressure of the incoming dirt. By dividing the predetermined capacity of the scraper into several compartments, much less power is required to load each compartment alternately, since the only resistance offered is weight of the loaded compartments in swinging them up and out of the loading position by revolving the drum-like structure.

This construction also enables the implement to be made extremely compact, that is with a very much shorter wheel base, as compared with implements employing the telescoping type of dirt carrier.

Another object is the provision of suitable shutter or closure means for retaining the dirt in the loaded compartments when transporting it from place to place, the shutter or closure means also facilitating successive discharging of material from said compartments.

A further object is the provision of an implement in which the raising and lowering means comprises a pair of hydraulic cylinders associated with the frame of the implement and individual rolling supports hinged to said frame, each of the cylinders having two pistons arranged in tandem on one piston rod with a dividing wall in the cylinder barrel between the two pistons to form 4 fluid chambers in each cylinder unit, the two end chambers being connected to the conduits supplying fluid under pressure for raising and lowering the implement and the two intermediate chambers of each cylinder being interconnected by conduits with a valve for facilitating the tilting of the implement by varying the amounts of fluid within these chambers and for uniform distribution of lifting power for raising an unevenly loaded dirt carrier.

Another object is the provision of an implement in which the rolling supports are equipped with brakes automatically controlled by the momentum of the implement, so that the momentum of the implement, especially when loaded will not tend to push the tractor when the speed of same has been slowed down.

As a further object, it provides a simple and compact yet substantial power controlled implement by means of which very large quantities of earth may be removed, transported and discharged quickly and efliciently with a minimum of power.

With these and other objects in view the invention consists in the combination, correlation and construction of parts, members and features which will be described in the specification and will be finally pointed out in the claims.

Referring to the drawings:

Figure 1 is a plan view of a heavy duty scraper implement embodying my invention.

Figure 2 is a side elevation of the implement.

Figure 3 is a section on line 33 of Figure 1.

Figure 4 is a rear end elevation of the implement.

Figure 5 is a front end elevation of the implement.

Figure 6 is a section on line 66 of Figure 3, illustrating the mounting of the earth carrier.

Figure '7 is a section on line of Figure 1, illustrating the reversing mechanism-for revolving the earth carrier.

Figure 8 is a diagrammatic view of the hydraulic power system as used for raising and lowering the implement.

Figure 9 is a diagrammatic view similar to Figure 8, illustrating the cylinders'in a position for tilting the implement transversely.

Figure 10 is a fragmentary section illustrating the earth carrier in the position for transporting material.

Figure 11 is a diagrammatic view of the automatic brake controlling system.

Figure 12 is a modified form of the earth carrier.

Figure 13 is a section on line l3- l3 of Figure 12.

ure 14.

Figure 14 is another modified form of the earth carrier. Y

Figure 15 is a section on line I5-|5 of Fig- The objects outlined above are attained by the preferred and modified forms of embodiment of the invention'shown in the drawings, which in a generic sense consists of a'cylindrical structure having a plurality of compartments adapted to receive, retain, and discharge large quantities of scraped dirt, a frame pivotally carrying said cylindrical structure, means for rotating said cylindrical structure, rolling supports for said frame at the forward. and rearward ends of same, hydraulic power units associated with the .rear

rolling supports and the. frame for raising and lowering the implement, each of said power units consisting of two cylinders in tandem interconnected by means of conduits and controlled by valves, sothat the implement may be raised and lowered by simultaneous operation of said power units, so that an unevenly distributed load may be raised, carried, discharged or lowered without undue strain on any one of the power units by.

balancing pressures within said power units, and so that, the implement may be tilted transversely by displacing the fluid within the cylinders proportionately between the power units, an auto-' matic brake system for the rolling supports to control the momentum of the implement, and means for connecting said implement to a tractor.

Referring to Figures 1 to 11 inclusive:

In a more specific sense, the preferred form of heavy duty scraper exemplified in the accompanying drawings in a practical form of embodiment, is shown as comprising a frame I consisting of side plates 2 longitudinally reinforced at top and bottom by means of channel members 3 and 4, respectively. The side plates 2 are spaced apart and secured at the forward and rearward ends to transverse members 5 and 6 respectively. The transverse members 5 and 6 are of a hollow boxed construction for rigidity and of which the inner surfaces 1 and 8 are concave as shown to conform with the periphery of a cylindrical earth carrier which will be described subsequently.

, The forward transverse member .5 has intermediate its ends and flush with the top thereof a forwardly extending then downwardly depending tongue 9 which in turn is connected through a swivel arrangement ID to a carriage or rolling support H. The carriage II has a draft tongue l2 for connection to a tractor or other vehicle.

The rear transverse member 6 is provided with brackets l3 which in turn carry a shaft 14. Pivotally mounted on shaft M are two rearwardiy extending members l5 and I6. Each of the members l5 and I6 has, near the rear, a pair of lugs 'll between which rockably'supported on pivots I8 is a short axle I9 adapted to carry at each end thereof a wheel 28.

Thus the rear end of the implement is sup ported on two carriages adapted to swing independently in the vertical plane as is necessary for raising, lowering, and tilting the implement, and also each carriage oscillates transversely in the vertical plane to compensate for uneven surface so that the load is always carried on all four wheels.

Interposed between side plates 2 is a cylindrical earth carrier 2| having a plurality of compartments 22. ments are shown. The compartments 22 are formed by partitions 23 arranged in the manner shown to form a triangular boxed section 24 In this instance three compart-- through the center of the carrier to insure rigidity. Each compartment is provided with a scraper blade 25 and slot or opening26 for scraping and admitting the scraped material respectively into the compartment.

The end plates 21 of the carrier 2| are provided with trunnions 28 which project through side plates 2 and are journaled in bearings 29 on the brackets 39. The brackets 38 are secured to the side plates 2 and their upper reinforcing channels 3. 4

The cylindrical earth carrier must be revolved to bring each successive compartment into the scraping and loading position after the preceding compartment. has been filled also the carrier must be revolved to bring each compartment successively into the discharging position. Any suitable driving means may be used to rotate the carrier in either one or both directions and the driving power: may be obtained from either the tractor engine through a power take-ofi provided for just such demand, or from an independent power plant as it is done in this instance.

The independent power plant comprises an engine 3| mounted on base plate 32 which in turn is secured on the frame 2. The engine 3| is connected directly to the jack shaft 33a of the re versing mechanism 33. The jack shaft 33a is journaled in the bearing standard 34 as shown at 35. Near the top of bearing block 34 and parallel with thejack shaft 33a are sleeve like projections 36 and 31 on which clutch discs .38 and 39 are journaled. The clutch disc 38 has on'its hub a sprocket 40 operatively connected to sprocket 41 on Jack shaft 33a by means of chain 42. The clutch disc 39 has on its hub a gear 43 meshing with gear 44 on jack shaft 33a. Slidably journaled within the bore 45 in block 34 is. a shaft 43 having at each end the clutch discs 41 and 48. The clutch disc 48 has an elongated hub 49 adapted to slidably engage the shaft 50 through spline 5| of the speed reducing unit 52. The hub 43 is also in operative engagement with a shifting lever 53 pivoted as at 54 on the case of the speed reducing unit 52 and connected as at 55 to the piston rod 55 of the hydraulic cylinder 51 which in turn is pivotally supported, as at 58, on the speed reducer case 52.

The speed reducer 52 consists of a worm '59 secured to the shaft 50 and meshing with the worm gear 89 secured to the cross shaft 6|. The cross shaft 6| is journaled near its ends in bearings 62 mounted on the base plate 32. At the ends of the cross shaft 8| are sprockets 63 connected through chains 64 with sprockets 65 secured on the shafts 66 which are journaled in bearings 61 on the brackets 30 the shafts 68 also carry the pinions 68 which in turn mesh with the ring gears 69 secured to the end plates 21 of the earth carrier 2|.

The reversing mechanism 33 operates as follows: The clutch discs 38 and 39 revolve in opposite directions by virtue of the chain drive for disc 38 and the direct gear drive for disc 39. By applying fluid under pressure to cylinder 51 the shifting lever 53 may be swung either forwardly or rearwardly to bring either the disc 48 or 41 into engagement with either disc 39 or 38 respectively, thus changing the direction of rotation of shaft 45 and, through the above described drive, the earth carrier 2|. When it is desired to maintain the earth carrier in a fixed position the reversing device is brought to the neutral position, as illustrated in Figure 7,

A hydraulic pump 10 is drivemthrough chain and sprocket assembly 1| from the jack shaft 33a to supply fluid under pressure to the hydraulic -control means. For diagrammatic flow charts see Figure 8 and Figure 9;

The pump 10 is mounted on the base plate 32 directly over the tongue 9. The tongue 9 is of a hollow boxed construction part of which may be partitioned to form a fluid reservoir 12 from which the pump 10 is supplied with fluid through the to the raising and lowering apparatus80 through conduits 8I and 82, or to the plug 19 through port 83 then by manipulating plug 19 the fluid may be directed through port 83a in plug 19 to to cylinder 51, for operating the reversing mechanism, through conduits 84 and 85, or to the return conduit 86 which leads back to reservoir 12.

The plugs 18 and 19 of the dual valve 15 are manipulated independently through individual control means 81 and 88 respectively and which may consist of plug levers 89 connected through links 90 to other levers 9| mounted on spindles 92 pivoted in bracket 93 which in turn is secured to the downwardly depending portion of the tongue 9. The spindles 92 are connected through universal joints 93 to the telescoping shafts 94 then through universal joints 95 to a set of levers 96, similar to levers 9|, which are pivotallycarried by the bracket 91 mounted on the tractor frame 98. The levers 96 are connected through links 99 to the manipulating handles I00 and IOI, which are positioned within the reach of the operator as illustrated in Figure 2.

The cylinder 51 for controlling the reversing mechanism 33 has springs I02 interposed between the ends of the piston I03 and the ends of the cylinder 51, as shown in Figure 8. These springs I02 return the piston I03 to the central position within the cylinder to maintain the reversing mechanism 33 in the neutral position when the plug 19 is turned'to the neutral position, as shown in Figure 8. Both the pressure at the ends of cylinder 51, and the liquid displacement is balanced by virtue of the chamber 11, in valve 15, communicating with both of the conduits 84 and 85, and the force of the springs in returning the piston to the central position, respectively.

The piston I03 may be equipped with a pair of opposed relief valves I04 to maintain the pressure at either side of the piston below a predetermined point.

The raising and lowering apparatus comprises two hydraulic cylinders I05 and I06 which are pivotally connected through the forked members I01 and I08 to the rearwardly extending carriage members I5 and I6, respectively, as shown at I09. Each of the cylinders I 05 and I06 has a centrally located partition IIO dividing the bore of the cylinder into two chambers, namely an upper chamber III and lower chamber H2. The piston rod II3 of each cylinder passes through both the partition I I0 and the upper head of the cylinder and caries the pistons H4 and II 5 in tandem which in turn operate in chambers III and II 2 respectively. The upper end of each piston rod I I3 is pivotally connected, as at II6, to brackets II1 which, are mounted on the upper edge of the boxed transverse member 6 of the frame I.

The upper and lower ends of the cylinders I05 and I 06 are connected to the conduits BI and 82, respectively, for directing the pressure on top of pistons I I4 to lower the implement or for directing the pressure to the bottom of pistons -I I5 for raising the implement through the manipulation of plug 18 of the dual valve 15.

The upper and lower chambers III and H2, respectively of cylinders I05 and I06 are interconnected by means of a conduit and valve system II8 'which comprisesa valve II9 having four equally spaced ports leading from the valve chamber I20 through conduits I2I, I22, I23, and I24 to the lower end of chamber III, upper end of chamber II 2 of cylinder I05, andlower end of chamber III,upper-end chamber II1 of cylinder I 06, respectively, through suitable ports I25 in \the partitions I I0 of the cylinders I05 and I06. The valve I I9 is equipped with a plug I26 having a centrally located port I 21 and the ports I28 and I29at the sides.

In practice, for raising and lowering the implement, the valve plug I26 ,is set as shown in Figure 8 and displacement of fluid through the interconnecting system II9 takes place as follows:

When raising the implement the fluid in the upper end of chamber 2 of cylinder I05 is forced out, by the upward movement of piston I I5, through conduit I22, valve port I29 and conduit I24 into the lower end of chamber III of 0 cylinder I06. In like manner the fluid in the upper end of chamber II2 of cylinder I 06 is forced into the lower end of chamber I I I of cylinder I05. This mannerv of fluid displacement is reversed when lowering the implement.

The cubic displacement of these chambers is equal, therefore, the exact amount of fluid expelled by the lower pistons of each cylinder is forced into the upper chambers of the opposite cylinders. This causes both sets of pistons to move in unison maintaining the raising and lowering of the implement on an even keel especially when the earth carrier is loaded unevenly.

For certain classes of work it is necessary to tilt the'implement so that the scraping edge is at an angle to the ground surface. This is accomplished as follows:

For instance, if it is desired to raise the left side of the implement the valve H9 is manipulated so that the port I21 of plug I26 lines up with the conduits I 2I and I22, at the same time closing the passage between conduits I23 and I24, then fluid under pressure is admitted to the cylinders through conduit 82. By virtue of,the closed passage between conduits I23 and I24 the fluid in the upper part of chamber II2 of cylinder I06 cannot escape therefore there is no movement of the pistons and piston rod consequently the right side of the implement remains stationary. Inasmuch as the cylinder I06 is not operating the full pressure is directed to cylinder I05 moving the pistons and piston rod upward, forcing the liquid from the upper part of chamber I I 2 through conduit I22, port I21 and conduit I2I into the lower part of chamber I II and thereby raising the right side of the implement. See Figure 9.

When the implement has been tilted to the desired degree the valve I I9 is turned to its original position, see Figure 8, and the implement may then be raised and lowered as described above.

In practice, when stopping or even decreasing the forward movement of the tractor, the momentum of a heavy duty implement of this type especially when loaded with twenty cubic yards, or more, of material, has a tendency to push the tractor forward overcoming the effectiveness of the tractor brakes thereby producing undue strain on the vital parts of the tractor which usually results in serious damage. Therefore it is necessary to equip the implement with suitable brakes.

The implement may be provided with any suitable manually operated or automatic brake system. However, to eliminate the human factor necessary in manually operated brake systems a'nd especially the factor of unskilled operators, I prefer to use an automaticsystem which is highly sensitive to the slightest variation of movement between the tractor and the implement and will automatically apply or release the brakes in varying degrees according to the change in tractor speed.

An automatic brake system filling the above outlined requirements is best illustrated in Figure 3 and Figure 11.

At the end of the downwardly depending tongue 9 is a block member I30 within which is slidably supported the shank I3I of the clevis I32 pivotally connected, as at I33, to the swivel arrangement I0 of the forward carriage II. The clevis shank I3I is adapted to slide longitudinally and its travel is limited adjustably by the nut I34. The distance of travel or play is just enough to actuate the brake applying device I35, and which under normal conditions is but a fraction of an inch.

The brake applying device comprises a lever I36 pivotally secured to the nut I34, as at I31, and an actuating link I38 is pivotally connected to the lever I36 and the sliding block I30 to swing the lever I36 forwardly when the momentum of the implement moves the slide block I30 forward along the shank of clevis I32. The forward swing of the lever I36 is utilized to actuate the push rod I39 and piston I40 within the cylinder I4I which in turn is suitably mounted within the downwardly depending tongue 9. The actuating of piston I40 causes fluid under pressure to be delivered from cylinder I through conduit I42, then through the T I43 and conduits I44 and I45 to the rear carriage members I5 and I6 re-.,

spectively, where it is again divided and conducted through Ts I46 and suitable conduits I 41 to the conventional hydraulic actuating mechanism within brakes I48 of the wheels 20.

Any loss of fluid in the brake system is then constantly replaced through a conduit I49 which extends from the cylinder I4I to a reservoir tank I50 which may be incorporated within the structure of the tongue 9. It will be noted that the port I5I, through which the supply of fluid is maintained within the cylinder MI, is just ahead of the piston I40 when it is in the inoperative position, as illustrated in Figure 10, so that the initial part of the pistons movement will close the port and prevent the fluid from being forced back into the reservoir I50.

The conduit I42 is also connected with the reservoir tank I50 through the branch I52 which has a valve I53 interposed therein. This valve renders the brake system operative or inoperative as the occasion demands, since by closing the valve the fluid is directed to the brakes and by opening it is directed to the reservoir tank.

The actuating lever I36 is formed as shown at I54 to present the flat portion I51 to the push rod I39. This flat portion I51 acts as a safety device because it has spring enough to bend in case there is forward movement of block I30 along clevis shank I3I after the fluid in the brake system has been compressed to capacity.

Referring again to the earth carrier 2| and particularly its position for transporting material as illustrated in Figure 10. It will be noted that the concave sides 1 and 8 on the transverse members 5 and 6 of frame I act as shutters for the openings 26 of the compartments'22 to retainthe material within these compartments until discharged.

Referring to Figures 12 and 13 inclusive:

The modified form of the invention shown in these views comprises a flxed scraper blade I56 secured to the side plates 20. of the frame Ia eliminating the blades 25 on the carrier 2| in the preferred form.

The boxed transverse member 6 of the preferred form is substituted by an arcuate shutter plate I59. An auxiliary shutter I60 comprising a boxed cross member I6I having at its ends the rearwardly extending arms I62 which are pivotally carried at the ends on the trunnions 26a, is provided. The concave surface I63 of the cross member I6I acts as a continuation of the curved plate shutter I59. The auxiliary shutter I60 rests on the stops I64 on the side plates 2a of frame Ia closing about half of the opening between the lower edge of the fixed plate shutter I59 and the scraper blade I56. The opening between the lower edge of the auxiliary shutter I60 and the scraper blade I53, as shownin Figure 12, is ample for ordinary use, however, when scraping a surface containing large boulders or rocks which will not pass through this opening the auxiliaryshutter will swing up by riding over the rocks thus automatically increasing the size of the opening enough to admit these rocks. The weight of the shutter I60 may be increased to suit by filling the hollow cross member I6I with water or other fluid through the plug hole I65.

All parts identical with those of the preferred form have the same reference number with the character (1" annexed.

Referring to Figures 14 to 15 inclusive:

The modified form of the invention shown in these views differs from the preferred form in that the end plates 21 of the carrier 2| are eliminated and the side plates 2 of frame I are utilized to close the ends of the compartments 22.

The carrier 2Ib has at each end a triangular block I66 which is fitted into the triangular boxed section 2411 and retained there by the bolts I61. These triangular blocks I66 are provided with the outwardly extending trunnions 23b which project through side plates 2b and are journalled in bearings 291) on the brackets 30b. The ends of the carrier 2 lb flt close to the side plates 21), with just the operating clearance between, thus utilizing the side plates 2b as end closures for the compartments 22b.

The trunnions 281) project beyond the bearings 29b and have secured thereon the gears I68 which mesh with the pinions I69. The pinions I69 are integral with the sprockets b which are journaled on the stud shafts I10.

In this form the shutter members 5b and 6b are similar to those in the preferred form.

A fixed scraper blade "I is secured between the side plates 2b similar to the blade I56 in the first modified form.

All parts identical with those, of the preferred form have the same reference numbers with the letter b annexed.

Having thus described my invention I claim:

1. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, an earth carrier having a plurality of compartments for scraping up and retaining the earth, pivotal means for transversely supporting the carrier within said frame, means for bringing each of said compartments successively into the loading, carrying or discharging position, shutter means on said frame for the forward and rearward sides of said carrier to retain earth within said carrier, an opening between said shutters for intaking or discharging the earth, an auxiliary shutter for the forward side of said carrier to automatically control the size of the intake opening, means for controlling the operative and inoperative positions of said scraper.

2. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, an earth carrier having a plurality of compartments for scraping up and retaining the earth, pivotal means for transversely supporting the carrier within said frame, means for bringing each of said compartments successively into the loading, carrying or discharging position, shutter means on said frame for the forward and rearward sides of said carrier to retain earth within said carrier, an opening between said shutters for intaking or discharging the earth, an

auxiliary shutter for the forward side of said carrier to control the size of the intake opening, means for controlling the operative and inoperative positions of said scraper.

3. In a machine of the character described adapted to travel over a surface to be treated and scrape up material therefrom, a main frame, a multiple compartment carrier to receive the scraped up material, means for imparting movement to the carrier to bring empty compartments successively into loading position and to move loaded compartments away from loading position, shutter means at the front and rear sides of the carrier for retaining material loaded into the compartments, an opening between said shutters for intaking material and an auxiliary shutter for said opening so that all compartments may be full at the same time.

4. In a machine of the character described adapted to travel over a surface to be treated and scrape up material therefrom, a main frame, a multiple compartment carrier to receive the scraped up material, means for imparting movement to the carrier to bring empty compartments successively into loading position and to move loaded compartments away from loading position, shutter means disposed at the front and rear sides of the carrier for retaining material loaded into the compartments, an opening between said shutters for intaking material, and an auxiliary shutter for said opening.

5. In a machine of the character described adapted to travel over a surface to be treated and scrape material therefrom, a main frame, a multiple compartment carrier mounted on the main frame to receive the scraped up material, means for imparting movement to the carrier to bring empty compartments successively into loading position-and to move loaded compartments away from loading positio shutter plates carried by the main frame at the front and rear sides of the carrier for retaining the material loaded into the compartments, an opening between said shutters for intaking material and an auxiliary shutter for said opening.

6. In a machine of the character including a plurality of material supporting units arranged about a horizontal axis to receive material, means whereby material may be loaded sccessively into each unit until all units are full, shutters for.

frame, amultiple compartment carrier journaled on the main frame to receive the scraped up material, means for imparting rotary movement .to

the carrier to bring empty compartments successively into receiving position and move full compartments away from receiving position until all compartments are full, shutter plates rigid with the main frame at the front and rear sides of the carrier to retain material in the compartments when the compartments are in certain p0- siions, said shutter plates being integral parts of the main frame, an intake opening between the lower edges of the shutter plates for intaking material and an auxiliary shutter. for the intake opening.

8. In the machine of the character described adapted to travel over a surface to be treated and scrape up material therefrom, a main supporting frame, a multiple compartment carrier pivotally supported on the main frame to receive the scraped up material, means for imparting movement to the carrier to bring empty compartments successively into receiving position and move the full compartments away from receiving positions, shutter means carried by the main frame at the front and rear sides of the carrier to retain material in the compartments when the compartments are in certain positions, an intake opening between the lower edges of the shutters for intaking material and an auxiliary shutter for the intake opening.

9. A material moving implement comprising a frame, rolling supports for said frame, a carrier pivotally supported with relation to said frame upon a horizontal axis, a plurality of segmental compartments within said carrier and arranged around the axis thereof for receiving and retaining material, said compartments having closed ends and a peripheral wall section in advance of which a filling opening occurs, a portion of which peripheral wall section is disposed, when the filling opening is in position to receive a load, at such angle that material comprising the load will not slide therefrom, and a circumscribing housing structure for the carrier having a loading opening therethrough and with which the filling opening of the carrier compartments successively register as the carrier rotates and which carrier openings are closed by the housing to retain material when moved from said registering position.

10. A material moving implement comprising a frame, rolling supports for said frame, a carrier 'pivotally supported with relation to said frame upon a horizontal axis, a plurality of segmental compartments within said carrier and having scraper blades formed on the advance edge thereof, said segmental compartments being arranged around the axis thereof for scraping up and retaining material, said compartments having closed ends and a peripheral wall section in advance of which a filling opening occurs, a portion of which peripheral wall section is disposed, when the filling opening is in position to receive a load, at such angle that material comprising the load will not slide therefrom, and a circumscribing housing structure for the carrier having a loading opening therethrough and with which the filling openings of the carrier compartments mental compartments within said carrier and arranged around the axis thereof for receiving and retaining material, said compartment having closed ends and a peripheral wall section in advance of which a filling opening occurs, a portion of which-peripheral wall section is disposed, when the filling opening is in position to receive a load, at such angle that material comprising the load will not slide therefrom, and a circumscribing housing structure for the carrier having a loading opening therethrough and with which the filling openings of the carrier compartmentssuccessively register as the carrier rotates and which carrier openings are closed by the housing to retain material when moved from said registering position and a scraper blade formed on the lower surface and in advance of the loading opening of the housing.

12. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, a rotatable earth carrier having a plurality of compartments disposed around an axis of rotation, each compartment having a loading opening, a peripheral wall extending substantially circumferentially from one side of said opening, a back wall extending from the edge of said peripheral wall in the direction of said axis of rotation and side walls connecting said peripheral and said back walls, and cooperating walls carried by said frame for closing said openings.

13. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, a rotatable earth carrier having a plurality of compartments disposed around an axis of rotation, each compartment having a loading opening, a peripheral wall extending substantially circumferentially from one side of said opening, a back wallextending from the edge of said peripheral wall in the direction of said axis of rotation and side walls connecting said peripheral and said back walls, cooperating walls carried by said frame for closing said openings; and means for rotating said earth carrier on said axis of rotation so as to bring said openings selectively into load receiv-. ing position.

14. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, a rotatable earth carrier having a plurality of compartments disposed around an axis of rotation, each compartment having a loading opening, a peripheral wall extending substantially circumferentially from one side of said opening, a back wall extending from the edge of said peripheral wall in the direction of said axis of rotation, and side walls connecting said peripheral and said back walls, cooperating walls carried by said frame for closing said openings; means for rotating said earth carrier on said axis of rotation so as to bring said openings selectively into load receiving position; and a scraper blade mounted on the front edge of each of said peripheral walls.

15. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, a cylindrical earth carrier mounted on said frame, said carrier having a plurality of peripheral earth receiving openings leading into sepsaid backs, means for bringing each of said com- 5 partments into loading, carrying or discharging positions, andcooperating wall meanslcarried by said frame for closing said openings when they are in positions in which the contained load could spill therefrom.

16. A scraper comprising a frame adapted for connection to a tractor, rolling supports for said frame, a cylindrical earth carrier mounted on said frame, said carrier having a plurality of peripheral earth receiving openings leading into separate compartments each formed by a cylindrical segment wall, a back extending from the rear edge of said wall toward the axial zone of said carrier, and side walls connecting said seg-' ment walls and said backs, means for bringing each of said compartments into loading, carrying or discharging positions, cooperating wall means carried by said frame for closing said openings when they are in positions in which the contained load could spill therefrom; and a scraper blade mounted on the front edge of each of said segment walls.

17. In a scraper, the combination of a frame; scraping and carrying means supported by said frame; a rear rolling support for said frame; a front rolling support for said frame, one of said supports being longitudinally shiftable on said frame; means for transmitting a motivating force to said scraper from a tractor, said means being so connected as to cause shifting movement of said shiftable support; and brake means for said scraper operating in consequence of shifting movement of said shiftable support.

18. In a scraper, the combination of: a frame; scraping and carrying means supported by said frame; a rear rolling support for said frame; a front rolling support for said frame, said front rolling support being connected to said frame so as to have a relative longitudinal movement; draft means for connecting said front rolling support 45 to a tractor; and a brake for said scraper operating in consequence of rearward movement of said front support relative to said frame.

19. A material moving implement comprising a frame, rolling supports for said frame; a carrier 5 pivotally supported with relation to said frame upon a horizontal axis, a plurality of segmental compartments within said carrier and arranged around the axis thereof for receiving and retaining material, said compartments having'closed 5 ends and a peripheral wall section in advance of which a filling opening occurs, a portion of which peripheral wall section is disposed when the filling opening is in position to receive a load, at such angle that material comprising the load will not 5 slide therefrom, and a circumscribing housing structure for the carrier having a loading opening therethrough and with which the filling opening of the carrier compartments successively register as the carrier rotates and which carrier 5 ing material, said compartments having closed ends'and a peripheral wall section in advance of which a filling opening occurs, a portion of which peripheral wall section is disposed when the filling opening is in position to receive a load, at such angle that material comprising the load will not slide therefrom, and a circumscribing housing structure for the carrier having a loading opening therethrough and with which the filling opening of the carrier compartments successively register as the carrier rotates and which carrier openings are closed by the housing to retain material when moved from said registering position, there being a scraper blade supported at the lower edge of said loading opening and a discharge opening-in said housing rearward of said scraper blade.

21. In a scraper, a frame, a transverse scraper blade supported in fixed position on said frame, a

bowl pivotally supported on said frame in a position behind said scraper blade to receive material scraped up thereby, and means for swinging said bowl relative to said frame and blade to dump the load rearwardly of said blade.

22. In a scraper, a frame, a transverse scraper blade supported in fixed position on said frame, there being a discharge space behind said blade, pivot means on a horizontal axis in a plane above said scraper blade, side walls extending down from said pivot means in spaced relation, a carrier wall extending from the lower portion of one side wall to the lower portion of the other side wall and being disposed in a position to receive and support thereon a load which is picked up by said blade, and means for moving said carrier wall relative to said frame so as to dump the load through said space behind said blade.

-CHARLES LE BLEU.

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