US1876604A - Spreader and evener attachment for motor graders - Google Patents

Description

Sept. 13, 1932. c. u. BRUNER ET AL SPREADER AND EVENER ATTACHMENT FOR MOTOR GRADERS Filed Aug. 18, 1931 3 Shaets-$heet l afye U-Br u-n er ilian glare Sept. 13, 1932.

c. u. BRUNER ET AL 1,876,604

SPREADER AND EVENER ATTACHMENT FDR MOTOR GRADERS Filed Aug. 18, 1931 5 sheets-sheet 2 jwuento'os 04 (I EBrune r MSLazzy/irz'q'ye p 1932- c. u. BRUNER ET AL 1,376,604

SPREADER AND EVENER ATTACHMENT FOR MOTOR GRADERS Filed Aug. 18, 1931 3 Sheets-Sheet 5 l. UB7 u 71421 VAI-SJIa JrIJ e Patented Sept. 13, 1932 srArss CECIL U. BRUNER AND WILLIAM s. LAUGHBIDGE, or MARION, xAnsAs SPREADER Ann 'RvRNER ATTACHMENT FOR MOTOR GRAnnRs Application filed August 18, 1931. Serial No. 557,877.

This invention relates to means for spreading and'evening the dirt on aroad which 1S being maintained and particularly to an attachment adapted to be applied to motor graders to this end. The-ordinary motor' grader is very liable to produce what is known as a washboard effect on the road, that is, the road bed will not be even but will be wavy with alternate humps and hollows. One of the objects of the present'invention is to provide an attachment which may be applied to' the ordinary motor grader which will smooth and level the road, distribute the loose dirt so that it will fill up the hollows and thus eliminate this washboard effect, and a further object is to provide a device of this character which will distribute the ridge of gravel or dirt made by the regular blade of the grader. I 7

Another object is to provide a device of this character in which the blade is held resiliently from chattering, in which the blade may be shifted to different angles and in which the blade may be readily raised or lowered out of or into operative position.

Other objects will appear in the course of the following description.

Our invention is illustratedin the accompanying drawings, wherein y 'Figure tachment applied to a motor grader, the grader being shown in dotted lines;

Figure 2 is a fragmentary side elevation v partly in section of the blade and the means for regulating its height from the road bed; Figure 3 is a fragmentary top plan view showing the connection between the draft bars and the blade;

Figure 4 is a fragmentary elevation of the scraper, one of the draft beams being in section; 7

Figure 5 is a perspective view of the trans-- verse draft beam;

the draft beam being in section, the telescopic the blade of our improved spreading and the grader A.

1 is a perspective view of at- I Figure 6 is an elevation of one draft bar,

evening attachment. This blade may be of any suitable construction. Bolted to the blade are the irons 11 extending Vertically upward. Braces 11a are pivoted loosely in the lower ends of these irons and extend up ward and rearward. The middle of the blade is formedwith the upwardly extending lug 12.

The draft beam 13a's shown in Figure 5 is a formed of two superposed members 14 and 6'0 15 spaced from each other for nearly their entire length and having attached thereto the forwardly extending bar 16 designed to be riveted or bolted rigidly to the rear end of I v The draw bars whereby the blade is connected to the draft beam 13 consist each of two members 18 and 19, the member 18 telescoping into the member 19. The member 18 is formed with a plurality of holes 20 so that 7073 i the member 19 may be adjusted thereon and the two members being held in their adjusted position by a pin 21. The forward endof each draft member 18 is reduced for inser tion loosely within the opening defined by the parts '14.- and 15 of the draft beam and is provided with an aperture which may be j alined'with an aperture 23 in the draft beam and secured thereto by a pin 22 as shown in Figure 6, this loose connection permits the draw bars to swing upward or downward as illustrated in dotted lines in Figure 6.

There 'are a plurality of apertures 23 in the draft beam which permit the draw bars to be laterally shifted to shift the scraper laterally. The bar 16 is braced from the draft beam by means of the braces 24 which are connected to the rear end of the draft beam in any suitable manner. It will be seen that the draft beam is detachablyconnected to these braces and to the member 16 by means of the removable pins or bolts 13a.

In order to raise or lower the blade 10, each member 19 is cut away at 25 (see Figure 2) and mounted upon the tubular member 19 is the sleeve 26. This sleeve is disposed to surround the tubular element 19 at the opening 25 and is provided with the upwardly extendingears 27 one of said ears having an arcuate rack 28 formed on its edge. Pivot ed between these ears on a pivot pin 2-9 is a cam 30 having a radially extending handle 31 provided with a spring actuated bolt 32 urged into engagement with the rack 28. This tooth is liftable out of engagement with the rack by means of the hand grip 33. Passing through a guide aperture formed in the sleeve 26 immediately beneath the cam 30 is.

bars by means of a transverse pin or bolt 37 each extending through a slot 38 in the draw bar this pin extending through the forked ends of the irons 11. The rear end of each draw bar carries upon it the upwardly extending pin 40 for a purpose to be later stated. The pins 37 permit the ready detachment of the blade 10 from the draw bars.

For the purpose of lifting the attachment off the ground into an inoperative position or lowering it into operative position, we provide a cable 41 which at its rear end is connected to a ring 42 in turn connected to two divergent cables 43 which at their ends are operatively connected to the ends of the blade 10. The cable 41 passes over a pulley 44 mounted on the cab of the grader A and then this cable passes to a winding drum 45 having the usual crank handle and ratchet for holding cable wound up to any desired extent upon the drum.

While we have illustrated a particular dis position of this-winding drum, it will be understood that this is purely illustrative of the fact that a winding drum may be used and that the winding drum or other device for this purpose is to be mounted within the cab in convenient position for the driver to operate it.

For the purpose of holding the blade to its work and preventing the blade from chattering, we mount upon the draft beam 13, the upwardly extending arm 46 having mounted therein the bell crank lever 47, this lever having a handle 48, the other end of the lever being pivoted to a rod 49 which extends downward and rearward and through the aperture in the member 12 on the blade.

The rod is provided with a collar 50 and a coiled compression. spring 51 is disposed between this collar and the upwardly extending arm 12. The arm 46 is provided with a rack 52 and the lever 48 is provided with a bolt 53 and a hand grip for releasing it whereby the lever may be held in any adjusted position. When the lever is forced fully downward, the spring 51 will be fully compressed and willbear very strongly against the blade, thus holding the blade from any chattering. By adjusting the lever, any debracing the rod 54 and interiorly screw threaded. This brace rod is supported at its inner end by providing the section 54 with an eye 58 engaging with an upwardly extending pin 40 mounted preferably upon the ported in a fork 60, asillustrated in Figure 6, this fork having a shank extending through and being rotatable in the section 18. There are two of these forked supports 60, each mounted upon one of the sections 18 and there are two of the upwardly extending pins or hooks 40 so that the brace formed of the sections 54 and 55 may be disposed either in the position shown in Figure 1 or with the cranked end of the brace disposed through the other fork on the right hand side of the machine in Figure 1 with the eye 58 engaged with a pin 40 on the left hand end of the blade or mold board 10.

The purpose of making the crank and brace rod reversible is so that it may be changed from one side to the other depending upon the adjustment of the blade 10. If it is desired to reverse the blade so as to throw the dirt either to the right end or to the left end of the blade, the blade is changed in its angular position by changing, of course, the relative lengths of the draw bars. One end ofthe blade may be raised or lowered relative to the other end or the blade may be'raised the same amount at both ends by means of the levers 31.

This attachment is designed to be disposed back of the grader blade or near to the rear of the grader depending upon the kind of grader to which the attchment is applied.

The function of the grader A. is to level and smooth and respread dirt, gravel or sand moved by the blade of the grader. This grader blade frequently wash-boards the road or leaves small gulleys or ruts in it and it also leaves a ridge at one side where the dirt, sand or gravel passes off the blade of the grader. Our device covers or fills these gulleys, smooths out ridges and is afinisher of maintained roads. Inasmuch as the blade of the spreader is provided with two wheels 35, it follows that the rocking common to the blades of graders, which rocking causes the washboard effect, is entirely eliminated.

While we have shown caster Wheels 35, it will be understood that it is not entirely necessary that caster wheels should be used, but

so tubular member 19., The rotatable section 55 is provided with two collars 59 and supthat the spindle 34 mightbe so mounted in the member 26 that it cannot rotate. Preferably, however, we use caster wheels which will follow every lateral movement of the tractor. f

It will be seen that the blade can be lifted from the ground by the cable 41 for the reason that theforward end of each of the draw bars is relatively thin as shown in Figure 6 and extends into the relatively wide slot or space formed between the members 14 and 15. When the blade 10 is to belifted, however, the upper end of the tension spring rod 49 is to be disconnected from the'lever 47. This is accomplished by loosely and removably connecting it to the member 47 by means of a loose shackle bolt 47 a. The slots 38 and the looseness of the connection of the brace 11a to the pin holding this brace in place and to the iron 11 as shown in Figure 4 permit the scraper blade to be shifted from a position at right angles to theline of draft into a slightly angular position in either direction. This shifting movement, however, need be only slight in order to reverse the blade. When it is desired to use the tractor without this attachment, the transverse draw beam 13 can be readily disconnected from the draft iron 16 and from the braces 24 and under these circumstances, of course, the cable 41 is to be disconnected from the ring 42 or the draft bars formed of the parts 18 and 19 may be disconnected from the draft beam, the rod 49 disconnected from the lever,

47 and the cable 41 disconnected, in which case the motor grader will merely carry the iron 16 and the draft beam with the upwardly extending arm 46.

WVhile we have illustrated certain details of construction and arrangements of parts, we do not wish to be limited thereto as it is obvious that many changes might be made in the details without departing from the spirit of the invention, as defined in the appended claims.

We claim 1. An evening attachment for motor graders comprising a draft beam having means whereby it may be attached to the rear end of the motor grader behind the grading blade thereof, draw bars extending rearward from the draft beam, a blade supported at the rear end of the draw bars, wheels mounted upon the draw bars for relative vertical movement, means for vertically adjusting said draw bars relative to the wheels and including levers mounted on the draw bars and operatively engaging said wheels, and means attached to the grader whereby the draw bars and the blade may be bodily raised from engagement with the road.

2. An attachment for motor graders comprising a draft beam having means whereby it may be connected to the rear end of the grader, sectional draw bars extending rearward from the draft beam, means whereby one section of each draw bar may be adjust ed upon the other section to increase or decrease the length of the draw bar, a blade operatively connected to the rear ends of the dr'aw'bars, wheels mounted upon the draw bars, manually operable means for raising or lowering the draw bars relative to said wheels, and a longitudinally extensible brace engaged at one end with one of the draw bars and extending diagonally thereto and operatively engaged at its other end with the other draw bar.

3. vAnattachment for motor graders comrisin adraft beam havin means whereb itmay be connected to the rear end of the grader, sectional draw bars extending rearward from the draft beam, the sections'being adjustable upon each other to increase or decrease the length of each draw bar, a

blade operatively conn'ectedto the rearends' of the draw bars, wheels mounted upon the draw bars, manually operable means for raising or lowering the draw bars relative to said wheels, and a longitudinally extensible brace engaged at one end with one ofthe draw bars and extending diagonally thereto and operatively engaged at its other end with the other draw bar, each of said draw bars having a seat for the forward end of said brace and each drawbar having'a member thereon with either one of which the rear endof the brace may be engaged.

4. A leveling attachment for motor grad ers including a transversely extending draft beam having means whereby it may be con nected to the rear end of the grader, draw bars extending rearward from the draft beam, a blade to which the rear ends of the draw bars are connected, an arm extending from the draft beam, a bell crank mounted on the arm and having a handle, and means whereby it may be locked in a plurality of positions, and a rod connected to the bell crank and extending through a portion of the blade, and a spring carried by said rod and operatively bearing against a portion of the blade whereby to apply yielding pressure to the blade to hold it to its work.

5. An attachment for motor graders including a transversely extending draft beam having means whereby it may be connected to the rear end of the motor grader, draw bars connected to the draft beam and extending rearward therefrom, a blade operatively connected to the rear ends of the draw bars, and means for holding the blade to its work comprising an arm extending upward from the draft beam, a bell crank mounted in the arm and having a handle, and means for locking the bell crank in any adjusted position, a rod extending rearward from the bell crank, the blade having an upwardly extending lug through which said rod freely passes,

rod and bearing against said lug, the tension of said spring being adjusted by adjusting the bell crank.

6. An evening and leveling attachment for motor graders, including a draft beam having a forwardly extending tongue adapted to be rigidly connected to the motor grader, draw bars extending rearward from the draft beam and connected thereto for swinging movement in a vertical plane, a blade operatively connected to the draw bars, means on the draw bars for vertically adjusting the blade and means for swinging the draw-bars and blade upward out of contact with the work 5 or lowering the blade into contact with the work including two convergent cables attached to the ends of the blade, and a cable connected to the convergent cables and extending forward to means whereby it may be taken up or released.

7. An attachment for motor graders including a transversely extending draft beam having means whereby it may be connected to a motor grader, draw bars extending rearward from the draft beam, a blade operatively connected to the rear ends ofthe draw bars, and means for raising or lowering the blade comprising wheels having Vertical spindles extending into the draw bars, and

cams mounted upon the draw bars and engaging said spindles to depress them or permit their upward movement, said cams havhandles whereby they may be adjusted, and means for holding the handles in any :15. adjusted position.

In testimony whereof we hereunto afiixour signatures.

CECIL U. BRUNER. WILLIAM S. LAUGHRIDGE.

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