US1413664A - Road grader - Google Patents

Description

F.'B.'KING.

ROAD GBADER. l APPLICATION FILED AuGIIg, m2o.

1,41 3,664 Y Patented Apr. 25, 1922.

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F. B,l KING.

ROAD GRADER.

APPLICATION FILED Aue.19, |920.

1,413,664- y Patented'Apr25, 1922.

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PATENT orifice.

FRANK B. KING, 0F GUTHRIE, OKLAHOMA.

Roan GRADE.

specification of Lttersratent. Patented Apr. 25, 1922.

Application led August 19, 1920. Serial No. 404,537.

To ait whom 'it may concern:

Be it known that I, FRANK B. KING, a citizen of the Unlted States, residing at Guthrie,

in the county of Logan and State of 0kla homa, have invented certain new and useful Improvements in Road Graders; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable othersr skilledin the art to which it appertains to make and use the same, reference being had tothe accompanying drawlngs, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to a roadv grader particularly applicable for grading streets or roads between curbs or forms and the invention contemplates the provisionof means whereby the surface may be graded to a proper predetermined depth and cross section below the curb, coping or forms.

In the illustrated embodiment of my invention I have shown a surface cutter and ay sub-soil cutter driven at approximately the same speed and delivering material to a conveyor or elevator which may transpose it to the sideof the road bed beyond the curb.

I have shown means for intermittently driving the machine, said means being effective in imparting a continuous rotative motion to the surface cutter and sub-soil cutter, the mechanism being Such that at regular intervals the machine will move forward and f stop, the cutters all the while continuing to rotate, however, so that the grading of the road bed may be elicently and advantageously effected without 'special individual,

attention during the grading operation.

In the drawings, Y, l Fig. 1 is a side elevat1onal vlew of a machine constructed in accordance with my invention.

Fig. 2 is a vertical, longitudinal, sectional with bearings 10 and 11 respectively, in which are mounted stub shafts carrying flange traction wheels 12 and 13 adapted to travel over the track, curb, or coping, shown at 14 and 15 (Fig. 3) to maintain the frame yand cutters on a predetermined level as the machine passes over the road bed to be graded.

The curbing, coping, or track consisting of the members 14 and 15 is laid down in advance of the introduction of the machine over the road bed and serves as a gauge for- 4 the cutters carried by the grading machine, as will appear hereinafter.

The frame 1 supports a power device or prime mover shown as consistingy of a hydrocarbon enginel, the crank shaft of which is connected to av transmission mechanism 17 in yrear thereof, which drives a shaft 18 carry- 75 ingrat one end a beveled gear 19, meshing with a complementary gear 20 on the transverse shaft 21. y v

The transverse shaft 21 drives a shaft 22 at the rear end of the frame through the medium of an endless chain or belt connection 23 in an obvious manner., and said shaft is provided with a plurality of sprockets 22 for driving the elevator fiights 24 in lrear of the machine and above the shoe 25 appro- 85 priately fastened to the rear of the frame through the medium of th'e tie-rods 26 and to lthe conveyor frame 27. The flights 24 distribute the material on the conveyor 28 lwhich travels transversely of the machine through the shaft 29 carrying the' gear 30 meshlng with the gear 31 on shaft 22.' The transverse conveyor 28 passes over idlers in the usual manner and has aninclined branch which passes around a shaft 32 on which is 95 a sprocket`33 driven from the sprocket 34 on shaft 29 through the medium of the chainy 35. VThere is a sprocket not shownfon the opposite' side of the machine corresponding to the sprocket 34 so that the dirt may be 100 discharged at either side of the frame 1 by transferring a bracket arm carrying the shaft 32" and the sprocket 33 and extending the belt or conveyor 28 to accommodate the chain. v

The shaft 21 carries a spur gear 37 meshingwith'the teeth 38 0f an idler 39, which 'carries equi-distantly 4disposed toothed segments, in the present instance three, desig- `hated 40, 41, and 42, these being spaced aparty 110 so that at uniform intervals they will succesfsively engage the spur gear 43 on the hub of the traction or flanged guide wheel 13,l it being understood that. duplicate 'mechanism is on the machine opposite to the side illustrated in Fig. 1 so that the machine is driven from both sides.I

The spur teeth 38 of the idler 39 engage a gear 44 meshing with an idler 45 of substantially the same construction as the one designated 39 but minus the segments 40, 41 and 42 and the teeth of said idler 45 mesh with a gear 46, the gears 44 and 46 being mounted on cutter shafts 47 and 48 carried by bearings 49 and 50 suspended fromthe frame 1. Therefore, when the engine is operated, the shaft`21 will be rotated to impart motion to the elevator and conveyor in rear of the machine continuously. At the same time the mechanism which transmits power to the cutter shafts 47 and 48 also becomes effective inv intermittently moving the machine forward at regular intervals and permitting the machine to stand still during definite periods in the cycle of operations.

In other words, the machine moves forward a distance determined by the number of teeth on the segments 40, 41 and 42 and remains idle dependent upon the spaced relation between the segments, but all the while the cutters and conveyor are being contin- -uously operated. rIhe purpose of this is to move the machine forward and allow it to stop while the cutters are tearing away the earth to grade the road bed to the proper depth below the top of the track, curb or coping and to give time for the material to be conveyed away from the cutters to the side of the road bed.

I have provided a novel form of rotary cutters best shown in Fig. 4 as consisting of a plurality of angles, there being four shown and arranged back te back. The angles in Fig. 4 are designated 51, 52, 53 and 54 and they are spaced apart to provide a crossshaped recess between which the cutting .elements 55 may be clamped. The cutting elements are shown as consisting of bars having curved ends 56, the bars being clamped between the backs of the angle irons to admit of adjustment in length necessary tosecure desired crown or cross section and being arranged in staggered relation; that is, those in one row are staggered with respect to those'in the next succeeding row, thus requiring one complete revolution of shaft to complete continuous cut. On the ends of the angles are fastened heads 57, to which the shafts 47 and 48 are secured. The angles are clamped together by means of suitable fastening devices such as bolts 58 but other fastening means may be employed if desired.

By reference to Fig.'2 it will be observed that the forward or surfaceremoving cutters have radial arms spaced about 90 apart, the length of the arms being less than the length of the corresponding arms of the subsoil cutters in rear thereof. rIhe purpose of this is to permit the first or surface-removing cutters to remove the surplus material from the surface and then permit the longer arms of the sub-soil cutters to remove the material to a greater depth. All of the material removed by the respective cutters, however, is passed rearwardly to the for- Vward end 59 of the shoe 25 and it is carried by the flights 24 to the conveyer 28 and discharged to the side of the machine.

rIhe machine is designed to extend entirely across the street or roadway or such section thereof as may be suitable to width of machine in use so that a uniform grading may be accomplished and so that as the machine passes along the street, the bed will be graded for the surface covering in a convenient and expeditious manner tothe required crown and cross section.

It will be'apparent that the machine will be entirely automatic in its operation, passing forward a determined distance, stopping, cutting away the material and conveying it to the side of the road bed, and then progressing for another cut.

In actual practice the segments 40, 41 and 42 will be designed to movethe machine forwardly a distance having a definite relation to the cutters so as to insure all of the surplus earth being removed from the road bed during its preparation.

Various changes in form, proportion and minor details of construction may be resorted to without essentially departing from the spirit of this invention, it being understood that such changes as are contemplated by the scope of the claims may be made without departing from the spirit thereof.

By reference to the foregoing description it w1ll be apparent that the cutter knives or bars 55 may be adjusted to provide a convex surface or crown for the roadway, a convex surface or a straight surface, the adjustability ofthe knives but affected by loosing the nuts 15 on the bolts which hold the angle irons in clamping position.

lWhat I claim and desire to secure by Letters-Patent is:

1. In a device of the class described, a

rotary cutter including transversely arranged angle irons, the flanges of which are arranged back to back to form a crossshaped recess, radial cutter bars between the flanges of the angle irons, and means for fastening the angle irons together to clamp the bars between them.

2. In a deviceof the class described, a rotary cutter including transversely arranged angle irons, the flanges of which are arranged back to back to form a crossshaped recess, radial cutter bars between the flanges of the angle irons, means for fastening the angle irons together to clamp the bars between them, and radial arms located Laurence` between the bars and arranged in rows, those in one row being in staggered relation to those in the other row.

3. A cutter for rotary graders comprising a plurality of angles arranged back to back, cutter bars clamped between the angles, bolts for fastening the angles in functional posi-l tion, a head on the end of said angles, and

means on said head for rotating the same to impart motion to the cutter bars.

4. In a device of the class described, a rotary cutter including angle irons, the flanges of which are arranged back to back to form a cross-shaped recess, radial cutter bars longitudinally adjustable between the anges of the angle irons, means for fastening the angle irons together to clam'p the bars between them.

5. ln a device of the class described, a rotary cutter comprising cutter clamping bars, radial cutter bars between the clamping bars and adjustably held there between a clamping means for binding the cutter bars between the clamping bars.

In testimony whereof I alix m si nature.

FRANK lNG.

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